US2868165A - Apparatus for building up and hardsurfacing cylindrical rollers - Google Patents

Description

2,868,165 UP AND H D-SURFACING L ROLLER 13, 1959 H. A. ALTMAN APPARATUS FOR BUILDING CYLINDRICA Filed Jan. 3, 1956 2 Sheets-Sheet 1 Jan. 13, 1959 H. A. ALTMAN 2,868,165

APPARATUS FOR BUILDING UP AND HARD-SURFACING CYLINDRICAL ROLLERS Filed Jan. 5, 1956 2 Sheets-Sheet 2 46 fi Z I N VEN TOR.

United States Patent APPARATUS FOR BUILDING UP AND HARD- SURFACING CYLINDRICAL ROLLERS Hugo A. Altman, Minneapolis, Minn.

Application January 3, 1956, Serial No. 556,843

6 Claims. (Cl. 118-620) This invention relates to methods and apparatus for refacing crushing roll surfaces without necessitating the removal of. the roll from the crushing machine.

After a period of use, the crushing rolls of an ore or rock crusher become worn and deformed. The cylindrical surface of such a roll must then be built up again to the original size and shape thereof so as to properly cooperate with the matching or adjacent roll in crushing ore supplied therebetween. In the past, common practice has been to remove the crusher roll from the ore handling and crushing machine and then taking the roll to a shop for refacing. Such practice necessitated shutting down the machine for a substantial period of time while the roll is being taken out and while a replacement roll is mounted.

Because few welding shops have the necessary facilities for handling such large and heavy rolls, they must be taken to a central shop, probably in an urban center many miles from the location of the crushing machine. The time involved and the loss of work resulting while the crushing machine is shut down for replacing the rolls thereof, and the transportation of the rolls over distances for servicing, combine to make the refacing of crusher roll surfaces a very expensive and inconvenient operation.

With these comments in mind, it is to the elimination of these disadvantages in the servicing of crusher rolls to which my invention is directed, along with the inclusion in my invention of other novel and desirable features.

An object. of my invention is to provide a new and improved apparatus of simple and inexpensive construction and operation for refacing or rebuilding the cylindrical working surface of a rock-crushing roller in an ore handling machine.

Another object of my invention is the provision of a novel mechanism to facilitate the ready and easy resurfacing and refacing of crushing rollers without necessitating that the rollers be removed from the ore and rock-crushing machine. Still another object of my invention is to provide an improved apparatus for continuously applying metal by welding on a worn cylindrical working surface of a crusher roller while the roller remains on the ore crushing machine so as to build up said surface and adapt the roller for further service in cushing ore and rock.

A further object of my invention is to provide a new and improved method for quickly and conveniently resurfacing the worn cylindrical working surface of an ore crusher roll. without necessitating the removal of the roll from the crushing machine and thereby effecting a very substantial savings in the maintaining of the ore crushing machine.

These and other objects and advantages of my invention will .more fully appear from the following description made in connection with the accompanying drawings wherein like reference characters refer to the same parts throughout the several views and in which:

Patented Jan. 13, 1959 ice Fig. 1 is a perspective view of the invention shown mounted on and in connection with a detail perspective view of a portion of an ore crushing and handling machine;

Fig. 2 is an end elevation view of the present invention shown mounted on a broken away detail portion of the ore crushing machine and being viewed from the side of the ore crushing machine opposite to that shown in Fig. 1;

Fig. 3 is a detail elevation view partly in vertical section wherein portions of the mechanism are removed for clarity and showing certain other portions broken away to show detail;

Fig. 4 is a detail section view taken on a vertical plane substantially as indicated at 44 of Fig. 3; and

Fig. 5 is a detail section view taken on a substantially vertical plane as indicated at 55 of Fig. 1 and showing certain of the operating elements in different operating relationship than shown in Fig. 1.

One embodiment of the present invention is shown in the accompanying figures and is described herein.

The invention is adapted for use with an ore-crushing machine, a portion of which is shown in Figs. 1 and 2 and indicated in general by numeral 10. The ore-crushing machine has a frame portion 11 for carrying the various operating portions of the ore-crushing machine such as the ore-crushing roll 12 which has a substantially cylindrical outer working surface 13 and which cooperates with another similar roll for crushing chunks of ore passing therebetween. The roll 13 is provided with a yieldable mounting to permit limited movement thereof. The mounting for roll 12 includes a pillow block 14 which provides a bearing for the end of the mounting shaft 15 to which roll 12 is afiixed. Pillow block 14 is movably mounted on frame 11 but is continuously resiliently urged to its normal position as by coil springs 16. Pillow block 14 is provided with a plurality of tapped holes 17 for receiving cap screws which hold a cover plate thereon which normally, during the operationof the ore crushing machine, encloses the end of shaft 15.

The present invention comprises an attachment for the ore-crushing machine 10 and includes a supporting structure indicated in general by numeral 18. Supporting structure 18 includes attachment means adapted for clamping connection with the frame 11 of machine 10, which means, in the form shown, comprise a clamp 19 having adjustable set screws 20 which comprise one of the jaws of clamp 19. Clamp 19 has a mounting bracket 21 affixed thereto. A pair of mounting rings 22 are formed integrally of bracket 21 and are disposed in spaced relation and alignment with each other. The supporting structure 18 also includes a rigid mounting shaft or rod 23 which extends through the aligned mounting rings 22 and is adjustably fixed with respect to the mounting rings by set screws 24 which are carried in suitably tapped holes in the mounting rings.

Rod 23 may be shifted upwardly and downwardly and may be swung about its longitudinal axis relative to bracket 21 and frame 11. Rod 23 has a mounting ring 25 formed on the upper end thereof and is adapted to receive the stub shaft 26 therethrough. Shaft 26 is.

tending flanges 29 and 38. Each of the sets of flanges 29 and 30 face each other and thereby define a track.

Means are provided for removably mounting the wire controlling and feeding head 31 on mounting 28. In the form shown, a pair of mounting elements 32 and 33 are disposed on opposite sides of the mounting 28 adjacent the flanges 29 and 38 respectively. Mounting elements 32 and 33 comprise, in the form shown, angle irons A connecting and mounting plate "34 is affixed as by bolts 35 to the upper end portions of mounting elements 32 and 33 and plate 34 overlies the upper flanges 29 and 38 of mounting 28, thereby interconnecting the mounting elements 32 and 33. The support for head 31, which includes mounting elements 32 and 33 and interconnecting plate 34 is movably supported on the track defined by flanges 29 and 38 by rollers 36 and 37 which are respectively journalled on opposite sides of the mounting 28 and on the mounting elements 32 and 33. Bolts 38 and 39 are mounted in the mounting elements 32 and 33 for carrying the respective rollers 36 and 37 thereon. The peripheral surfaces of rollers 36 and 37 respectively engage the lower flanges 29 and 3t). Rollers 36 and 37 are of the flanged type so as to be guided along the tracks defined by flanges 29 and 30 to thereby restrict transverse movement of the head mounting relative to mounting 28.

A pair of mounting rings 40 are fixedly secured as by welding to the plate 34 for adjustably receiving and supporting the head mounting shaft 41 therein. Mounting rings 48 are provided with set screws 42 for engaging and retaining mounting shaft 41 in a desired position. The supporting framework of head 31 is carried on mounting shaft 41 and is clamped thereto by means of a cradle 43 which surrounds shaft 41 and is secured to the head 31 as by bolts 44. Head 31 may be adjusted along the length of shaft 41 or may be rotated slightly about the axis thereof to be properly positioned. Head 3]. is of a conventional type adapted to continuously feed as by driving elements 4-5, a welding wire 46 therethrough. Head 31 is provided with driving motors 47 and 48 which are respectively adapted for A. C. and D. C. operation so as to facilitate use of the continuously feeding head 31 without regard to the nature of the power available. The head 31 has a control 59 adapted to vary the speed at which the wire 46 is fed therethrough. A guiding sheath 58 extends downwardly from head 31 to guide the wire 46 toward the peripheral surface 13 of roll 12. An electrical coupling 51 is carried on the lower end of guiding sleeve and is connected to a current-supplying bus 52 which may be connected to a conventional style welding machine adapted to supply weld current therethrough.

Connector 51 provides a sliding electrical connection to wire 46 in close proximity with the lower end of the wire so as to maintain power loss due to resistance in wire 46 at a minimum. Wire 46 is of a conventional type used in welding and may be supplied in a roll and suitably mounted on the ore crushing machine.

Driving means are provided for moving the wire-feeding head 31 longitudinally along mounting 28 as the roll 12 is rotated. In the form shown, such means include a pair of sprockets 53 and 54 which are respectively journalled at the outer and inner ends of mounting 28. A roller chain 55 is trained around sprockets 53 and 54 and is disposed between the flanges 30 and adjacent the roller 37. Connecting means are provided for attaching the head mounting to chain 55 and in the form shown, a

slide 56 is vertically shiftably mounted on the inner side of the angle iron 33 and is provided with a pair of upper and lower engaging pins or lugs 57 and 58 which are adapted to extend into links of chain 55. A mounting bolt 59 extends through an elongated opening 60 in angle iron 33 and is atlixed as in a tapped aperture 60 in slide 56. Guides 61 may be aflixed on the inner side of angle iron 33 for guiding the vertical movement of slide 56. The driving means also include a driving element 62 which is mounted for swinging oscillation relative to the rotation axis of sprocket 54. Driving element 62 also is connected with the sprocket 54 by means providing a unidirectional driving connection so as to drive sprocket 54 when driving element 62 is moved in one direction and then releasing the connection when drive element 62 is moved in another direction. In the form shown, a hub 63 is affixed to sprocket 54 and is provided with a recessed portion 64 in which a roller bearing 65 is mounted. A retaining and driving ring 66 surrounds the periphery of hub 63 and encloses bearing 65 therebetween. Ring 66 is aflixed to driving element 62 for oscillation therewith. As seen in Fig. 3, driving connection is provided between driving element 62 and sprocket 54 when driving element 62 is swung upwardly. Driving element 62 is swingably connected to a connecting rod 67 which is adjustably and swingably connected to an oscillating arm 68 which has a plurality of spaced apertures 69 along the length there of for mounting connecting rod 67 therein. Arm 68 is swingably connected by a cap screw 70 mounted in one of the tapped apertures of the pillow block 14. An actuating element or cam follower 71 is secured to the oscillating arm 68, as by bolts, and is provided with a plurality of apertures 72 to permit adjusting of the position of follower 71 with respect to arm 68. As best seen in Fig. 5 cam means are provided for driving the oscillating arm 68 and drive element 62 and in the form shown, such means include a cam actuator 73 comprising a sleeve rotatably mounted on a mounting stub 74 which is threadably secured to the end of roll shaft 15 in eccentric relation with the rotation axis thereof. Cam actuator 73 will rotate with shaft 15 and engage cam follower 71, as best seen in Fig.5.

Means are provided for securing a positive ground connection to roll 12 and in the form shown a conductor 75 is adapted for connection with another terminal of the welding machine or the ground terminal. Bus 75 is connected to the stator 76 of an electrical rotary coupling. The rotor 77 of the coupling is connected with the stator 76 in electrical conducting relation and is mounted coaxially of the rotation axis of roll shaft 15. Rotor 77 is secured to the lug 74 by an interconnection disc 78. The electrical connecting bus 75 is thereby securely and positively electrically connected to the roll 12.

Driving means are provided for driving the roll 12 at a controllable and slow speed. In the form shown, as best seen in Fig. 2, the driving belt pulleys 79 are disconnected from their wheel driving belts and an auxiliary source of rotary power indicated in general by numeral 88 is connected thereto. The auxiliary source of power includes a base 81 having a motor 82 mounted thereon which is drivingly connected to a controllable speedchanging mechanism 83 having a manual speed-changing control 84. The speed-changing mechanism 83 is coupled to a speed-reducing mechanism 85 for very substantially reducing the speed of the rotary power. The driving shaft 86 of speed reducer 85 has a drive pulley 87 keyed thereto over which is trained a driving belt 88 which is also trained over the driving pulley 79 of roller 12. Suitable means are provided for maintaining the tension on belt 88 and in the form shown such means comprise a controllably extendible member 89 such as a mechanical jack bearing against the base 81 and frame 11 of ore crushing machine 10.

Operation In operation, the motor 82 drives the roll 12 at a slow speed. The weld current will then be supplied through conductor 52 and the wire feeding head will be started by actuating one of the driving motors thereof so as to form a welded head on the outer periphery surface of roll 12. As the roll 12 and mounted shaft 15 are rotated, the eccentrically disposed c amming element 73 engages the cam follower 71, as seen in Fig. 5, and will urgeoscillating arm 68 and drive element 62 upwardly to produce rotation of sprocket 54 and movement of chain essence 55. As the upper run of chain 55 is moved to the left, as seen in Fig. 1, the wire feeding head 31 will be incrementally moved to the left along mounting 28. When cam actuator 73 has again rotated out of engagement with cam follower 71, drive element 62 will fall downwardly to be ready for subsequent driving operation. With continued rotation of roller 12 and shaft 15, the wire feeding head 31 will be moved in steps in a direction longitudinally of the roll 12 so as to cause the wire 46 to be moved in a similar manner, thereby forming sub stantially complete covering of metal on the peripheral surface of the roll 12. If the upward control mechanism 83 is adjusted by turning hand control 84, the rotation speed of roll 12 will be changed and the quantity of weld metal applied to the surface 13 is changed so as to either thicken or thin the quantity of material being applied. It is desirable that the wire feeding head 31 and wire 46 move approximately a quarter of an inch for each revolution of roll 12. This may be adjused by ad justed by adjustably repositioning the connection between connecting rod 6 7 and oscillating arm 68 to thereby effectively change the magnitude of stroke of drive arm 62. Adjustment of the magnitude of driving increment may also be changed by repositioning the cam follower 71 with respect to oscillating arm 68 and actuator 73.

The present invention may be applied to many different types of mechanisms employing such rolls as shown in the ore crusher 10, for the purpose of resurfacing such rolls. The supporting structure 18 may be adjusted in multi-directions so as to permit the head 31 to be conveniently disposed in the proper position relative to a roll to be resurfaced, regardless of the manner in which the supporting structure must be mounted on the machine frame. It will be seen that the head 31 may be moved longitudinally or arcuately relative to mounting shaft 41 and furthermore the mounting 28 may be moved longitudinally of or through an arc about the rotation axis of stub shaft 26. Furthermore, the mounting 28 may be rotated about the rotation axis of shaft 23 and also may be moved upwardly or downwardly or toward and away from the roll surface by moving rod 23 with respect to the retaining rings 22.

It should be seen that I have provided a new and improved apparatus for readily and easily resurfacing the building up of the working surface of a crusher roll without necessitating removal of the roll from the crusher machine.

It will also be apparent that I have provided a new and improved method of servicing the working cylindrical surface of a crusher roll by applying a controllable and variable auxiliary source of rotary power to the roll for turning the same and then forming a weld bead spirally on the working cylindrical working surface and on one end thereof to the other.

It will, of course, be understood that various changes may be made in the form, detail, arrangement and proportion of the parts without departing from the scope of my invention which consists of the matter described herein and set forth in the appended claims.

What is claimed is:

1. In apparatus for refacing a substantially-cylindrical surface of a crusher roll in an ore crushing machine, said apparatus comprising attachment means adapted for clamping connection to the frame of such a machine, an elongated mounting extending longitudinally substantially axially of the roll and adjacent the cylindrical surface thereof, said mounting being adjustably secured to the attachment means for adjustment in multi-directions, a supply of welding wire, a wire controlling and feeding head engaging the wire in driving relation and being constructed and arranged for driving the wire toward the surface of such a roll, said head being movably mounted on said mounting and being movable longitudinally thereof and longitudinally of the roll, electrical conducting means connected in conducting relation with said wire adjacent the roll and being adapted for connection to a source of welding current, drive means carried by said mounting and being operably connected with said head in drive relation, said driving means being constructed and arranged for moving said head along said mounting when said driving means is operated, and said driving means including an adjustably tendable oscillatory driving connection adapted for driving connection with the roll and being constructed and arranged for operating said drive means when said roll is rotated, whereby to facilitate application of the apparatus to machines of difierenttypes and to progressively move the head and welding wire axially of the roller as the latter is rotatedto thereby form a substantially spirally disposed weld bead on the roll surface from one end thereof to the other end.

2. In apparatus for refacing a substantially cylindrical working surface of a crusher roller in an ore crushing machine, said apparatus comprising an elongated mounting extending substantially axially of the roll and adjacent the cylindrical working surface thereof, said elongated mounting having attachment means adapted for clamping connection with the frame of such a machine, a supply of welding wire having an end disposed in close proximity with such a working surface of the roll, a wire-controlling and feeding head engaging the wire in driving relation and being constructed and arranged for driving the wire toward the surface of such a roll, said head being movably mounted on said elongated mounting, and adapted for movement longitudinally thereof and axially of the roller, oscillatory drive means carried by said mounting and being operatively connected with said head in drive relation, said driving means being constructed and arranged for moving said head along said mounting, and said drive means including a movable and adjustably extendible driving element and a cam follower adjustably connected to the driving element, stationary means engaging said driving element and being constructed and arranged for guiding the same, and a cam element secured on the roll and positioned adjacent the cam follower, said cam element being eccentrically disposed relative to the rotation axis of said roll for periodically drivably moving said driving element as the roll is revolved whereby to operate said driving means and progressively move feeding head along said mounting from one end of the roll of the other end thereof.

3. In apparatus for refacing the cylindrical working surface of a crusher roll in an ore crushing machine, said apparatus comprising a supporting structure having attachment means adapted for clamping connection with the frame of such a machine, said supporting structure including a track spaced from such a working surface of the roll and extending substantially axially of the roll, a supply of welding wire having an end portion disposed in close proximity with the working surface of such a roll, a wire controlling and feeding head drivably connected with said wire and constructed and arranged for driving the wire toward the surface of such a roll, said head being movably mounted on said track for movement longitudinally thereof and in an axial direction relative to the roller from one end thereof to the other end thereof, electrically conducting means connected in conducting relation with said wire adjacent the roll and being adapted for connection to a source of welding current, an adjustable driving element mounted on said supporting structure for oscillatory movement, said driving element having unidirectional driving connection with said feeding head for progressively moving the same along the track when said driving element is oscillated, means attachable to the frame of the ore crushing machine for guiding the driving element, a cam actuator securable to such a roll and positioned eccentrically of the rotation axis thereof, a cam follower secured to said driving element and drivably associated with said cam actuator to be oscillated thereby when said roll is rotated, whereby to drivably oscillate said driving element when said roll is rotated to thereby form a .continuously welded bead peripherally around the working surface of the roll and from one end thereof to the other.

4. The structure recited in claim 3 and including a variable speed auxiliary source of rotary power adapted for driving connection with said roll for rotating the same, whereby the rotation speed of the roll may be changed to vary the quantity of metal applied on the roll surface.

5. The structure recited in claim 3 wherein said driving element also has a reversible connection with said feeding head, whereby to move said head in either axial direction relative to the roller and thereby permit application of a welding bead toward one end and then toward the other end of the roll.

6. In apparatus for resurfacing a substantially cylindrical surface of a crusher roll in an ore-crushing machine, said apparatus comprising an elongated mounting extending longitudinally of the roll and adjacent the cylindrical surface thereof, attachment means on the mounting and effecting a temporary, but rigid connection to the frame of such a machine, a supply of welding wire, a wire-controlling and feeding head engaging the wire in driving relation and being constructed and arranged for driving the wire toward the surface of such a roll, said head being movably mounted on said mounting and being movable longitudinally thereof and longitudinally of the roll, drive means for moving the head longitudinally of the mounting and including a movable drive element on the mounting and extending throughout the length thereof, said drive element being coupled with the head for progressively moving the head from one end of the mounting to the other and said drive means also including an operating member for moving said drive element and thereby effecting movement of the head, means on the mounting and confining the drive element throughout its length against exposure to the surface of the roll and the spattering of weld metal during application of the weld metal to the roll surface, electrical conducting means connected in conducting rela tion with the wire adjacent the roll and being adapted for connection to a source of welding current, a variable speed auxiliary source of rotary power adapted for con nection with the crusher roll for rotating the same, whereby to facilitate application of a continuous, substantially helical bead of weld metal to the surface of the crusher roll without interruption.

References Cited in the file of this patent UNITED STATES PATENTS 129,238 Krorn July 16, 1872 759,644 Sturtevant May 10, 1904 759,931 Sturtevant May 17, 1904 1,886,503 Shockey, Nov. 8, 1932 2,187,837 Paasche Jan. 23, 1940 2,213,002 Hall Aug. 27, 1940 2,299,747 Hotter Oct. 27, 1942 2,427,350 Carpenter et al Sept. 16, 1947 2,726,628 Allenbaugh Dec. 13, 1955

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