CN102059660A - Combined type brazing ultrahard abrasive grinding wheel matrix suitable for ultrahigh-speed grinding - Google Patents

Abstract

The invention discloses a combined brazing superhard abrasive grinding wheel substrate suitable for ultrahigh-speed grinding. The combined brazed superabrasive grinding wheel base includes a bottom plate, a fixed ring, a pressure ring, a cover plate and an insert; on the outer wall of the annular groove, several installation grooves are evenly arranged along the circumference of the bottom plate; each of the A T-shaped insert is installed in the above-mentioned installation groove; the fixed ring is matched and installed in the annular groove and connected with the bottom plate, and is used to limit several inserts; corresponding to each insert, the fixed ring The upper connection is used to tighten the insert on the outer wall of the annular groove; the pressure ring covers the top of all the inserts and connects with the bottom plate for pressing the insert; the cover plate fits Installed in the central circular opening of the pressure ring and connected to the bottom plate, a part of the cover plate covers the fixed ring. The invention has the advantages of small connecting seam width, good integrity, reliable working performance, safe structure and suitable for ultra-high-speed grinding.

Description

A Combined Brazed Superhard Abrasive Grinding Wheel Substrate Suitable for Ultra-high Speed Grinding

the

technical field

The invention relates to a combined brazing superhard abrasive grinding wheel substrate, in particular to a combined brazing superhard abrasive grinding wheel substrate suitable for ultra-high-speed grinding.

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Background technique

The base body of the combined brazing superabrasive grinding wheel has an outer circular surface for brazing abrasive grains, and several connecting seams formed by interconnecting inserts are evenly distributed on the outer circular surface. The large width of the connecting seam causes the abrasive grains brazed on the outer circular surface to be unequally spaced, which leads to fluctuations in the grinding force of the combined brazed grinding wheel and affects the grinding quality. The effect on grinding quality is more obvious under ultra-high speed grinding conditions. At the same time, the traditional combined brazed grinding wheel structure cannot meet the design requirements of anti-deformation under the action of ultra-high speed and large centrifugal force. Although the integral brazed superabrasive grinding wheel does not have the above-mentioned joints and the spacing between the abrasive grains is uniform, its manufacturing size should not be large, and it is not suitable for ultra-high-speed grinding. Therefore, it is imperative to develop a combined brazed grinding wheel structure suitable for ultra-high-speed grinding.

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Contents of the invention

The technical problem to be solved by the present invention is to provide a combined brazed superabrasive grinding wheel base body suitable for ultra-high-speed grinding with good integrity, reliable working performance and small insert joint seam width.

The present invention comprises a bottom plate, a fixed ring, a pressure ring, a cover plate and an insert; an annular groove is arranged on the bottom plate with the center of the bottom plate as the center; A plurality of installation grooves are provided; a T-shaped insert is installed in each of the installation grooves; all the inserts form a matrix for connecting abrasive grains; connection, used to limit several inserts; corresponding to each insert, a tightening mechanism for tightening the insert on the outer wall of the annular groove is connected to the fixing ring; the The pressure ring is covered on the top of all the inserts and connected with the bottom plate for pressing the inserts tightly; the cover plate is fitted in the center round opening of the pressure ring and connected to the bottom plate, and a part of the cover plate covers on the retaining ring.

The base body of the combined brazed superabrasive grinding wheel in the present invention adopts a top-pressing clamping method to fix the insert, that is, the clamping mechanism on the fixing ring applies a radial clamping force to the insert, and the press ring presses the insert The block exerts a compressive force along the axial direction, pressing one by one to make the insert stick to the bottom plate and tighten it. Furthermore, the sides of the first part of the overall T-shaped inserts are connected to each other to form a matrix for connecting abrasive grains; the width of the connection seam between the above-mentioned inserts is small, and the abrasive grains of the grinding wheel can be optimized effectively. Sequential and equidistant arrangement, thereby ensuring the integrity of the connection between all inserts, improving the ability of the combined brazed superabrasive grinding wheel base to resist centrifugal force deformation and its working reliability under high-speed rotation. The linear speed of the grinding wheel can reach more than 180m/s, which is suitable for ultra-high speed grinding.

As an improvement of the present invention, each of the inserts includes a first part and a second part connected to the first part; a stopper is connected to the lower side of the second part; the stopper of the insert Arranged in the annular groove, clamped on the outer wall of the annular groove; the second part of the insert is fitted in the installation groove; the first part of the insert is outside the installation groove; the first parts of all the inserts are mutually composed Substrate for bonding abrasive grains.

As an improvement of the present invention, the clamping mechanism includes a clamping pin and a tapered screw; the tapered screw is threaded in an internally threaded hole vertically penetrating the fixing ring; the clamping pin penetrates One end of the side wall of the above-mentioned fixing ring abuts against the tapered surface of the tapered screw, and the other end abuts against the end surface of the second part.

As the screw-in depth of the tapered screw increases, the length of the pin pushed out of the fixed ring also increases, so that the pin exerts a radial pressure on the insert.

As a further improvement of the present invention, the end surface of the second part is an inclined surface.

The pin pushes against the end surface of the second part. Since the above-mentioned end surface is an inclined plane, the pressure exerted by the pin on the insert is decomposed into a radial force and an axial force, which further ensures the fit between the insert and the bottom plate. intensify.

As an improvement of the present invention, several wire grooves are uniformly arranged on the pressure ring.

The insert is pressed into each installation groove of the bottom plate by the pressure ring to play a clamping role. Due to the problem of processing dimensional accuracy, the height of the inserts placed in the installation grooves cannot be consistent. Therefore, processing several wire grooves on the pressure ring is conducive to the deformation of the pressure ring, so that each insert can be fitted with the pressure ring, thereby better clamping.

As an improvement of the present invention, the two opposite end surfaces of the first part are inclined surfaces parallel to each other.

A row of abrasive grains on the brazing orderly arranged superabrasive grinding wheel may not be parallel to the axial direction of the grinding wheel, for example, in a helical shape. Therefore, in order to meet the equal spacing between the abrasive grains of the grinding wheel, some end faces are also inclined. When the abrasive grains are arranged in this way, it is easy to make the distance between the abrasive grains at the connection between the insert and the insert equal to the grinding distance at the non-joint, that is, to ensure that the distance between all the abrasive grains on the surface of the grinding wheel is equal, the abrasive grains are evenly distributed, and the grinding The process is stable.

the

Description of drawings

Fig. 1 is the exterior view of the base body assembly of the combined brazed superabrasive grinding wheel;

Fig. 2 is the overall assembly structure diagram of the combined brazing superabrasive grinding wheel substrate;

Fig. 3 is a three-dimensional structure diagram of one direction of the insert;

Fig. 4 is a three-dimensional structure diagram of another direction of the insert;

Fig. 5 is a partial assembly structure diagram of the base body of the combined brazed superabrasive grinding wheel.

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Detailed ways

As shown in FIG. 1 and FIG. 2 , the ultra-high-speed grinding wheel base in this embodiment includes a bottom plate 1 , a fixed ring 2 , a pressure ring 3 , a cover plate 4 and an insert 5 .

An annular groove 1-1 is provided on the upper side of the bottom plate 1 with the center of the bottom plate 1 as the center. Several installation grooves 1 - 2 are uniformly arranged on the outer wall of the annular groove 1 - 1 along the circumferential direction of the bottom plate 1 . An insert 5 is installed in each of the installation grooves 1-2.

As shown in FIG. 3 and FIG. 4 , each of the inserts 5 is T-shaped as a whole, which includes a first part 5-1 and a second part 5-2 connected to the first part 5-1. A stop 5-3 is attached to the underside of the second part 5-2. The two opposite end surfaces 5-1-1 and 5-1-2 of the first part 5-1 are inclined surfaces parallel to each other. Of course, the above two end faces 5-1-1 and 5-1-2 may also be straight faces parallel to each other. The outer surface 5-1-3 of the first part 5-1 is an arc surface. In addition, the end surface 5-2-1 of the second part 5-2 is also an inclined surface.

As shown in Fig. 2 and Fig. 5, the block 5-3 of the insert 5 is arranged in the annular groove 1-1, and is stuck on the outer side wall of the annular groove 1-1. The second part 5-2 of the insert 5 is fitly installed in the installation groove 1-2. The first part 5-1 of the insert 5 is outside the installation groove 1-2. The first parts 5-1 of all the inserts 5 are assembled together to form a matrix for connecting abrasive grains.

The fixing ring 2 is fitly installed in the annular groove 1-1, and is connected to the bottom plate 1 by screws, so as to limit the positions of several inserts 5 . Corresponding to each insert 5 , a tightening mechanism 2 - 1 is connected to the fixed ring 2 . Each said tightening mechanism 2-1 includes a tightening pin 2-1-1 and a tapered screw 2-1-2. The tapered screw 2-1-2 is threaded in the internal threaded hole 2-1-3 vertically passing through the fixing ring 2. The said tightening pin 2-1-1 runs through the side wall of the above-mentioned fixed ring 2, and one end of it abuts on the tapered surface of the tapered screw 2-1-2, and the other end abuts on the end surface of the second part 5-2.

The pressure ring 3 covers all the inserts 5 and is connected to the bottom plate 1 by screws for pressing the inserts 5 tightly. Preferably, several wire grooves 3-1 are uniformly arranged on the pressure ring 3 .

The cover plate 4 is fitly installed in the central circular opening of the pressure ring 3 and connected to the bottom plate 1 by screws. A part of the cover plate 4 covers the fixing ring 2 .

Claims (6)

1. combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding is characterized in that: comprise base plate, retainer plate, trim ring, cover plate and insert; Center with base plate on described base plate is that the center of circle is provided with a cannelure; Along base plate on the lateral wall of described cannelure several mounting grooves are set equably circumferentially; One integral body is installed in each described mounting groove is inserting of T word shape; All are inserted and form the matrix that is used to connect abrasive particle mutually; Described retainer plate cooperation is installed in the cannelure and interconnects with base plate, and it is spacing to be used for several are inserted; Insert corresponding to each, be used for described inserting held out against jacking mechanism on described ring slot outside wall connecting on the described retainer plate; Described trim ring covers all tops of inserting and base plate interconnects, and compresses inserting being used for; Described cover plate cooperation is installed in the center round mouth of above-mentioned trim ring, and is connected on the base plate, and a part of described cover plate covers on the described retainer plate.

2. the combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding according to claim 1 is characterized in that: each described inserting comprises first and the second portion that is connected in the described first; On the downside of described second portion, connect a block; The described block of inserting is arranged in the cannelure, is stuck on the lateral wall of cannelure; Described second portion cooperation of inserting is installed in the mounting groove; Described first of inserting is in outside the mounting groove; All firsts of inserting form the matrix that is used to connect abrasive particle mutually.

3. the combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding according to claim 1 is characterized in that: described jacking mechanism comprises that one holds out against a pin and a cone screw; Described cone screw is threaded in the internal thread hole that vertically places described retainer plate; Describedly hold out against the sidewall that pin runs through the said fixing circle, the one end withstands on the conical surface of cone screw, and the other end withstands on the end face of second portion.

4. the combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding according to claim 3, it is characterized in that: the end face of described second portion is an inclined-plane.

5. the combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding according to claim 1 is characterized in that: some roads wire casing evenly is set on described trim ring.

6. the combined type soldering super-abrasive grinding wheel matrix that is applicable to superhigh speed grinding according to claim 1, it is characterized in that: two opposing end faces of described first are the inclined-planes that is parallel to each other.

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