The disk milling cutter

 

The disk milling cutter of similar design with the disk element of small diameter is used for quarry mining machines (machines for the development of the open method), drilling machines and road-building machines, and roll crushers. The disk milling cutter comprises a disk element, which has an outer wedge-shaped in the context of cutting edge and an axial bore and mounted on the console and removable mounted in a holder cone axle with the possibility of free rotation around it and in the axial direction is fixed to it by means of a combined radial-thrust bearing. This pin from its mounting has the shape of a truncated cone, the cone holder is associated with the specified cone shape tapered hole, the pin is connected to the cone holder with fixing screw, the side surface of the trunnion performs the function of the internal reference surface combined radial-thrust bearing. The wall of the axial bore in the disk element performs the function of the outer bearing surface of this combined radial-thrust bearing. The disk element is made solid and has a blind hole, as the radial peak slip, and as a thrust bearing is provided at least one ball bearing, the inner cylindrical raceway or sliding radial bearing formed on the trunnion and the outer raceway or slide of this radial bearing formed in the housing bore of the disk element. Each of these raceways or sliding radial bearing provided with a raceway for a set of balls of the ball bearing. The diameter of these balls is larger than the diameter of needle rollers or cylindrical rollers, respectively, when performing a radial bearing in the form of a sliding bearing is greater than the thickness of sleeve liner, and mutually facing each other, the ring of the mechanical side of the disk element and the holder of the milling cutter made in the form of seals. In one of the side surfaces forming the wedge-shaped section of the disk element, made going to the raceway close the hole for insertion of the balls inside the disk element. The roller cutter has high strength, durability and performance, and also has a simple construction and inexpensive to manufacture. 7 C.p. f-crystals, 6 ill.

The present invention apply is the movie and the axial hole and which is installed on the console and removable mounted in a holder cone axle with the possibility of free rotation around it and in the axial direction is fixed to it by means of a combined radial-thrust bearing, when this pin from its mounting has the shape of a truncated cone, the cone holder is associated with the specified cone shape tapered hole, the pin is connected to the cone holder with fixing screw, the side surface of the trunnion performs the function of the internal reference surface combined radial-thrust bearing and the wall of the axial bore in the disk element performs the function of the outer bearing surface of this combined radial-thrust bearing. The disk element is asymmetrically performed side surfaces that form its wedge-shaped part. The disk milling cutter of similar design with the disk element of small diameter is used for quarry mining machines (machines for the development of the open method), drilling machines and road-building machines, and roll crushers.

Because of the asymmetric disk element, and also because of the problems arising in the process of separation of the extracted or mined material from an array of efforts mount this disk element on the axle must be designed to transfer and radial and axial forces. Similar forces taking into account the principle of operation of the disk milling cutters have bristowe on it in the process, the moments of forces is significantly reduced, you receive the option of either using a mining machine, equipped with disc cones with smaller, compact disc elements for the development of more solid rock, or to reduce the energy required for such mining machines, and to reduce wear.

In mining machines, such as surface miners, rotating around its horizontal axis by the Executive body separated from the array of working tools material usually moves along the spiral channels from the outside inwards towards the centre of the specified Executive of the authority, where the material falls onto the conveyor. These tools are located in these spiral channels with a certain step from each other across the width of the Executive body of the mining machine. The space available for moving separated from the array of material, is the space between the housing Executive body of the mining machine, spiral channels with working tools and the line of the face (the plane of the face). Use as working tools drill bits for drilling or cutters with round rod allows thanks to their compact design to fit into winowiecki design, significantly limited the possibility of lateral movement separated from the array of material.

To ensure cost-effective performance development of a free radial height of the wedge-shaped part of the disk milling cutter (free radial height of the wedge-shaped part corresponds to the smallest distance from the outer side surface of the hub disk element to the top of the cutting edges of the Executive body of the mining machine and is referred to as the depth of the incision should be up to 1/4 of the diameter of the disk member with the highest possible rigidity. For this reason, the disk milling cutter, so that it was possible to equip the Executive body quarry mining combine, you must be in the form of a disk Mineralogy, having a narrow and rugged construction.

Disk milling cutter successfully applied in tunneling and mining industry for the extraction, respectively the development of hard rock. When spinning a disc milling cutter for strong breed her with a sectional wedge-shaped disk element has on rock crushing and simultaneously otkachivayuschee action. To achieve a similar effect with a disk milling cutter should be pressed to prednagruzki. Therefore, the disk milling cutter for their reliable operation must be sufficiently strong and rigid for the perception of similar design loads. Similar to the structural strength of the cone is determined not only by its size and shape, but the choice of material for its manufacture and properties of this material after improvement, and mount the disk element to the trunnion. If the disk milling cutters, the diameter of the disk element which is 300 mm or more, the design of such tools does not cause any particular problems, with smaller instruments with asymmetric shape of the disk element bearing assemblies must have a special version, because they cannot be used commercially available bearings, which are too large dimensions.

Thus, in particular, from article "Kontinuierlicher Gewinnungsvorgang im Festgestein", published in the journal "Surface Mining - Braunkohle & Other Minerals", the 53rd year of publication (2001), No. 2, S. 185-190, Fig.2, the right drawing, the famous small disk milling cutter with asymmetrical in terms of the performance of the disk element, which has the axis of its both sides, based on the mounting rack, and between that axis and the disk element includes a sliding bearing. This bearing skidding pad is. This sleeve liner is divided down the middle in a vertical plane into two parts, which as a result of the split bearing sleeve. Acting on the tool radial forces are transmitted by both halves of the sleeve liner on the axis, and the axial forces are transmitted to the mechanical ring washers on the mounting rack of the disk milling cutter. The separation of the sliding bearing, respectively, the sleeve liner into two parts, allows you to eliminate any side play in the area of annular washers under the action of radial load. In addition, the use of sliding bearing allows the disk milling cutter compact. However, the presence of bilateral support leads, obviously, to increase the size of the disk milling cutter along its width. In addition, this design is not completely solved the problems with the seal.

Narrower design you can get if you use the console attachment disk milling cutter, as it is known, for example, from the directory: Mechanized underground mining ores strong low-power fields /C. M. Lizorkin, B. L. gericke, Y. B. Uzun. Chita (Russia) 1999, S. 130. This is known from the abovementioned prior art cone shown in Fig.1. On a rotating bonds the economic hole With a tapered trunnion D. On the axle D has a cylindrical track E rolling bearing F with cylindrical rollers that perform the function of a radial bearing. Between this cylindrical track E rolling and cone stud D on the circumference previous track G rolling bearing N. This bearing N simultaneously performs the function of thrust and radial bearing. Disk element consists of three parts: the outer cutting ring I and the two split between the inner rings J and K, respectively forming the support ring and at the same time retaining ring ball bearing. These three structural element connected between a tightening their bolts L.

The disk element of the cone rests on a pin D through a combined antifriction bearing comprising bearing F cylindrical roller and ball bearing N. Internal path E rolling bearing F with cylindrical rollers and the inner lane G rolling bearing N performed, as described above, the cantilever protruding part of the stud D. In contrast, the outer track M rolling bearing F with cylindrical rollers and the outer track N rolling bearing N are the hole inside nutrena space of this combined bearing is closed on the outside cover of O. In this case, to reduce the size of the milling cutter along the width of the disk element is performed based only on one row of cylindrical rollers and one adjacent rows of balls. The advantage of this design of the disk milling cutter and the trunnion D is the ability to perform disk element of a relatively small diameter and width. It is obvious that when the console mounting studs should strive for the maximum possible reduction in the width of the disk milling cutter, however, the design with the two adjacent to each other by bearings F and H the width of the disk element is still quite large. In addition, a composite disk element I, J and K, respectively, all the disk milling cutter is a rather complicated and expensive to manufacture. Simultaneously, the composite disk element has only limited rigidity. With decreasing diameter of the disk element is reduced and the rigidity of the assembled housing of the milling cutter, tightened bolts.

From the application DE 3442875 C2-known further equipped with disc cutters and cutters with round rod or drill bit for drilling a screw or drum cutting Executive body for use in underground workings of ugenia are located in the screw channels sequentially in the cutting direction. According to this publication on the building drum of the Executive body in the screw channels are installed parallel to each other two annular side walls, a closed stripsaver sheet to the speakers of the disk milling cutter together with their holders did not impede the movement separated from the array of material between the screw channels in the establishment of congestion of this material. The side walls and stripsody sheet do not solid, thereby allowing you to place the disk milling cutter on the building drum of the Executive body in between the screw channels. The result is an effective protection built-in screw channels of the disk milling cutters along with their holders and at the same time ensures the smooth transportation of separated from the array of material. Cutters with round rod or drill bit for drilling attached to stripsaver sheet.

The present invention is to develop a disc milling cutter indicated at the beginning of the description of the type which, on the one hand, would have the smallest possible dimensions with the achievement of all the associated advantages small, compact disk milling cutters and thereby allow wasmoen, on the other hand, would combine the advantages of disk milling cutters medium size (the diameter of the disc element from 250 to 350 mm), such as high strength, durability and performance. The disk milling cutter together with its holder should be so narrow as not to hinder the movement separated from the array of material. In addition, such a roller cutter should be simple and inexpensive to manufacture. In addition, when the small diameter disk member and a short reference section of the axis of the cutting depth of the disk milling cutter should be up to 1/4 of the diameter of the disk element.

The specified task in relation to the disk milling cutter indicated at the beginning of the description type is solved due to the fact that the disk element is made solid and has a blind hole, as the radial bearing is provided a needle roller bearing, cylindrical roller bearing or a slide bearing as a thrust bearing is provided at least one ball bearing, the inner cylindrical raceway or sliding radial bearing formed on the trunnion and the outer raceway or slide of this radial bearing formed in the housing bore of DuChene for a set of balls of the ball bearing, the diameter of these balls is larger than the diameter of needle rollers or cylindrical rollers, respectively, when performing a radial bearing in the form of a sliding bearing is greater than the thickness of sleeve liner, and mutually facing each other, the ring of the mechanical side of the disk element and the holder of the milling cutter made in the form of seals, and in one of the side surfaces forming the wedge-shaped section of the disk element, made going to the raceway close the hole for insertion of the balls inside the disk element. Thus, the disk element is made according to the invention is a solid and therefore has high strength. This disk element not only performs the function actually working tool, but also is a component of the angular contact bearing. In the raceway radial bearing, which may be a cylindrical roller bearing, needle roller bearing or a sliding bearing, the raceway, which is a component of the bearing, which primarily performs the function of a thrust bearing. The diameter of the balls is larger than the diameter of cylindrical rollers or needle is against the closure in the axial landing disk element on the axle. Since the diameter of the balls of a combined radial-thrust bearing more clearance between the disk member and the axle, for the Assembly of the disk milling cutter in one of the side walls, forming a wedge-shaped section of the disk element, you should consider going to the raceway of the bearing hole intended for the introduction of the balls inside the disk element and re-closed after the introduction of the balls inside the disk element. Due to the sealed design of the disk milling cutter (disk element which is made solid with one hand and has a labyrinth seal with the other hand) excludes the ingress of foreign bodies in the bearing unit. Thus it is possible to provide continuous lubrication of the bearing unit, which in turn allows for the operation of the disk milling cutter without the need for its maintenance. Selected in accordance with the invention, the method of fastening the stud holder cone allows without any problems to replace the tools.

According to one of preferred embodiments of the invention when performing a radial bearing in the form of a needle roller bearing or a cylindrical roller bearing companie rollers and balls are mutually interleaved.

In accordance with another preferred embodiment of the invention when performing a radial bearing in the form of a cylindrical roller bearing these cylindrical rollers are always in pairs next to each other two rollers on a common axis and are held by the separator.

According to another preferred variant of the invention, when performing a radial bearing in the form of a sliding bearing bushing liner is made on the plot raceway balls holes and the exhaust from them a donation.

Preferably next to the radial plane in which lies the top of the wedge in the cut side of the disk element, in the middle of the crossed raceways, respectively, the radial sliding bearing.

In accordance with another embodiment of the invention parallel to the first bearing, it is preferable to set at least one ball bearing.

In addition, when performing a radial bearing in the form of a sliding bearing is preferable that the thickness of its sleeve liner corresponded to the diameter of the needle roller.

According to the following preferred variant of the first element and the holder of the milling cutter is invited to perform in the form of a labyrinth seal.

Other advantages of the proposed invention in more detail below on the example of the preferred variants of its implementation with reference to the accompanying drawings on which is shown:

in Fig.1 is known from the prior art disk milling cutter,

in Fig.2 is a side view of a cantilever holder disk milling cutter with a combined bearing unit consisting of a ball bearing and needle roller bearing,

in Fig.3 is a cross - section of the disk milling cutter plane a-a in Fig.2,

in Fig.4 - the console is mounted in a holder disk milling cutter with a combined bearing unit consisting of a bearing and sliding bearing,

in Fig.5 is a cross - section of the disk milling cutter plane a-a in Fig.4,

in Fig.6 is a perspective view of the stub liner, forming a sliding bearing.

In Fig.2 schematically illustrates the proposed invention the roller cutter (the so-called Mineralogy), the holders 2 which are mounted on swivel having the form of a roll, i.e., the cylindrical body 1 of the Executive body of the mining career harvester. Each of these holders 2 has a horizontal tapered bore 3 axle 4. This pin 4 is supported by a bearing integral is e 2 mounting screw 8 washer 17.

The lateral surfaces 6 and 7, forming a wedge-shaped section of the disk unit 5, is asymmetric. The choice of material for manufacturing these lateral surfaces 6 and 7 of the wedge-shaped side of the disk element, and the purpose of their actual sizes depend on the specific conditions of use of the tool and its layout as well as from property produced or developed material about his ability to separate from the array and the size of his pieces.

Used in a similar design bearings for reliability should have a high load carrying capacity and in accordance with this must be intended to absorb the high loads acting on the disk element 5 in the axial and radial directions during extraction extracted or mined material. Because disk mineralische because of the presence of a limited mounting space for placement of the bearings is impossible to use standard, commercially available bearings, according to the invention is provided by a special construction of the support or bearing Assembly. This bearing unit is a combination of rolling bearings, one of which is made in the form of a ball is Lipnik. The inner lane 10A rolling needle bearing 10 is made on the lateral surface of the cantilever protruding from the holder portion of the axle 4, and the outer track 10b rolling elements of the bearing are made on a disk element 5 inside opposite to the inner raceway. The location of the radial bearing to ensure uniform distribution of perceived bearing unit load is picked so that the radial plane in which lies the top of the wedge-shaped side of the disk unit 5 (corresponds to the section plane a-a), exactly in the middle of the crossed both raceway this radial bearing. Between the two raceways 10A and 10b are drawn Cup needle roller 10C. The inner lane 9a rolling bearing 9 is made axially in the middle of the track 10 bearings needle roller bearing 10, and the outer track 9b rolling of the ball bearing 9 is located in the middle of the outer tracks 10b rolling needle bearing 10 opposite to the specified external raceways.

Such a combined bearing is completed, as shown in Fig.3, ball and roller rolling elements 9c and 10C, while around the entire circumference of one bulb 9c Perry is redouane ball and roller rolling bodies, consistent with the specific conditions of use of the tool. In another embodiment, the radial bearing can also be done in the form of a cylindrical roller bearing. In this case, cylindrical rollers, as they are compared with the needle rollers 10C have a different ratio between their diameter and length, come in pairs. In order to avoid distortion of the cylindrical rollers of the rolling elements (balls 9s and a pair of cylindrical rollers) must be separated from each other and to provide directional rolling with separators. If the needle rollers 10C can without any problems be inserted from the side directly into the annular gap, introducing balls 9s inside the disk unit 5 due to their larger diameter in this storage element 5 should make the opening 12 closed by a cap 11 or screw. Needle roller bearing 10 is able to absorb high radial load. In contrast, the bearing 9 allows mainly to transfer all forces acting in the axial direction. Due to the fact that the balls have a larger diameter compared to the diameter of the needle roller 10C, respectively, cylindrical rollers, providing geometric C is nick 9 can also include a second ball bearing.

The above combined bearing effectively protected from contamination from the closed (solid) on the one hand the design of the disk unit 5 and due to the presence of labyrinth seal 13 with the other hand.

In Fig.4 and 5 show a second embodiment of a combined bearing. In this case, instead of needle roller bearing 10 or the cylindrical roller bearing for radial efforts used the stub liner 14 in combination with a ball bearing 9. In this sleeve insert 14 according to Fig.6 holes under 15 balls 9s, simultaneously performing the functions of the separator and cavities for bookmarks lubrication. If necessary, the size of these cavities to bookmark lubrication can be increased by running the exhaust from these holes 15 additional recess 16 with a variable-alternating axial direction.

Claims

1. The disk milling cutter, comprising a disk element (5) which has an outer wedge-shaped in the context of cutting edge and an axial bore and mounted on the console and removable mounted in a holder (2) of the milling cutter axle (4) with the possibility of free rotation around it and the specified pin (4) from its mount has the shape of a truncated cone, the holder (2) of the milling cutter is associated with the specified cone shape tapered bore (3), pin (4) is connected with the holder (2) of the milling cutter mounting screw (8), the side surface of the trunnion (4) performs the function of the internal reference surface combined radial-thrust bearing and the wall of the axial bore in the disk element (5) performs the function of the outer bearing surface of this combined radial-thrust bearing, characterized in that the disk element (5) is made solid and has a blind hole, as the radial bearing is provided a needle roller bearing (10)the cylindrical roller bearing or a slide bearing as a thrust bearing is provided at least one ball bearing (9), the inner cylindrical track (10A) rolling or sliding radial bearing formed on the axle (4) and the outer track (10b) of the rolling or sliding of this radial bearing formed in the housing bore of the disk element (5), each of these raceways or sliding radial bearing provided with a track (9a, 9b) rolling for a set of balls (9c) ball bearing (9), the diameter of these balls (9c) more diameter and the de bearing greater than the thickness of the stub liner (14), and mutually facing each other, the ring of the mechanical side of the disk element (5) and the holder (2) cone made in the form of seals, and in one of the side surfaces (6, 7) forming a wedge-shaped section of the disk element (5) made passing to the raceway close the opening (12) for introducing balls (9c) inside the disk element.

2. The disk milling cutter according to p. 1, characterized in that when the radial bearing in the form of needle roller bearing (10) or in the form of a cylindrical roller bearing combined bearing has a set of needle rollers (10C) or cylindrical rollers and balls (9c), the said rollers and balls are mutually interleaved.

3. The disk milling cutter under item 1 or 2, characterized in that when the radial bearing in the form of a cylindrical roller bearing these cylindrical rollers are always in pairs next to each other two rollers on a common axis and are held by the separator.

4. The disk milling cutter according to p. 1, characterized in that when the radial bearing in the form of a sliding bearing bushing insert (14) is performed on the plot raceway balls holes (15) and the departure of the ora is the top of the wedge in the cut side of the disk element (5), in the middle of the crosses paths (10A, 10b) of the rolling elements, respectively, the radial sliding bearing.

6. The disk milling cutter according to any one of paragraphs.1-6, characterized in that parallel to the first bearing (9) has at least one ball bearing.

7. The disk milling cutter according to any one of paragraphs.1, 4-6, characterized in that the thickness of the sleeve liner (14) of the sliding bearing corresponds to the diameter of the needle roller (10C).

8. The disk milling cutter according to p. 1, characterized in that the seal on the mutually facing each other annular end sides of the disk element (5) and the holder (2) of the milling cutter is made in the form of a labyrinth seal (13).

 

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