GB2078143A - Machine for processing rubber bodies of revolution - Google Patents

Abstract

The machine has mounted on a bed a charging device (2) for feeding a blank (3) to a gripper mechanism (4). This has a reciprocating motion drive (5) to shift the blank (3) to a blank fastening arrangement (6). This has a drive (12) for imparting reciprocating and a drive (11) for imparting rotary motion thereto. Securing devices (45) are mounted on the bed to retain the blank driving fastening. Devices (49) carry cutting tools (13) to process the blank (3), each having a drive (16) for imparting rotary and axial motion to the cutting tool (13). After processing a pusher (14) with a reciprocating drive (15) laterally removes the blank. The reciprocating drive (12) for the fastening arrangement (6), the reciprocating drive (5) for the gripper mechanism (4) and the reciprocating drive (15) for the pusher (14) are kinematically associated with a distributing shaft (17) rotatable by a motor (18) also coupled with the drive (11) for imparting rotary motion to the fastening arrangement (6). <IMAGE>

Description

SPECIFICATION Machine for processing rubber articles in the form of bodies of revolution The present invention relates to rubber industry, and more particularly to the machine for processing rubber articles in the form of bodies of revolution.

The present invention may be used to best advantage for processing reinforced collars for shafts of mechanisms and machines and for fitting them with steel spring rings.

Besides, the present invention may be used for processing, for example, round cross-section rings, flanged collars and other rubber articles in the form of bodies of revolution.

At present the requirements for the quality of processing surfaces of rubber articles and also the demand for the latter have grown considerably.

The primary object of the present invention is to provide a machine for processing rubber articles in the form of bodies of revolution which would allow labour productivity to be raised through automation of all processes in treating blanks of rubber articles.

Another important object of the present invention is to provide a machine for processing rubber articles in the form of bodies of revolution which would allow the quality of processing the articles to be improved.

Still another object of the present invention is to provide a machine for processing rubber articles in the form of bodies of revolution which would allow the output per unit of production area to be increased.

Yet another important object of the present invention is to provide a machine for processing rubber articles in the form of bodies of revolution which would allow safety of operation to be enhanced.

These and other objects are attained by providing a machine for processing rubber articles in the form of bodies of revolution, comprising a bed mounted whereon are: a charging device for feeding a blank; a gripping mechanism having a reciprocating motion drive and intended for shifting the blank from said charging device; an arrangement for fastening the blank, having a drive for imparting reciprocating and a drive for imparting rotary motion thereto; a plurality of devices for securing said blank during treatment in said arrangement for fastening the blank; a plurality of devices for setting and securing cutting tools to process the blank, each intended for fastening a suitable cutting tool and having a drive for imparting axial motion to the suitable cutting tool; a pusher disposed on said bed after said arrangement for fastening the blank and having a drive for imparting reciprocating motion thereto, the drive for imparting reciprocating motion to said arrangement for fastening the blank, each said drive for imparting axial motion to each corresponding cutting tool, the drive for imparting reciprocating motion to said mechanism for gripping the blank and the drive for imparting reciprocating motion to said pusher being kinematically associated with a distributing shaft rotatable by a motor also coupled with the drive for imparting rotary motion to said arrangement for fastening the blank.

Providing a machine for processing rubber articles in the form of bodies of revolution, according to the invention, allows to raise labour productivity by automation of all processes.

Concentration of mechanical treatment operations for processing the blank allows the output per unit of production area to be increased.

Automation of the process for treating rubber articles enables the operator to attend to multiple machines at a time, his work consisting actually in observing operation of the machine and replenishing the charging arrangement with rubber blanks.

As a result of obviating numerous manual operations and of the necessity for the operator to have access to the working zone of the machine, the quality of processing rubber articles and the conditions of work are improved and safety of operation enhanced.

It is advantageous that the machine for processing rubber articles in the form of bodies of revolution has the arrangement for fastening the blank mounted on the bed in a vertical manner so as to ensure vertical location of the axis of rotation of the rubber article to be processed. Such being the case, the end surfaces of the blank will be oriented horizontally for the article to assume the most stable spatial position, which facilitates orientation and feed of the blank to the treatment zone to be fixed in the arrangement for fastening the blank. Such a location of the rubber blank is also favourable for subsequent mechanical treatment operations (shifting the processed article and fitting it with a spring ring).

It is desirable that the machine for processing rubber articles in the form of bodies of revolution has the arrangement for fastening the blank made in the form of a spindle located in a sleeve rotatable around its axis so as to ensure the most simple gearing diagram of the drive for imparting rotary motion from the machine motor to the arrangement for fastening the blank, i.e. to ensure constant rotation of the arrangement for fastening the blank without other additional complications in the functional diagram of the machine.

It is favourable that the machine for processing rubber articles in the form of bodies of revolution has the drive for imparting reciprocating motion to the arrangement for fastening the blank made in the form of a lever-and-cam mechanism so as to allow the process of setting and securing the blank prior to processing and also the process of loosening and removing the processed article to be automated.

Besides, this would make it possible to impart reciprocating motion to the rotating arrangement for fastening the blank and also to fasten and loosen the blank in the course of rotation of the arrangement for fastening the blank.

It is expedient that the machine for processing rubber articles in the form of bodies of revolution has a compensating washer installed on the bed coaxially with the spindle so as to allow stable centring of the rotating blank after processing at the moment of braking when touching the stationary surface of the bed by killing the kinetic energy of the rotating processed blank.

Besides, as a result of continuing temporary joint rotation of the blank and the compensating washer during braking, the bearing surface of the processed blank is protected against mechanical damage (scores, scratches).

It is desirable that the machine for processing rubber articles in the form of bodies of revolution has each device for securing the blank in the course of treatment provided with an antifriction bearing pressing the blank to the arrangement for fastening the blank, disposed inside a heatinsulating cap and mounted on a mandrel hingedly connected with a bracket secured on the bed, which will allow to ensure a reliable pressing of the blank being processed in the course of rotation to the arrangement for fastening the blank and to build up a sufficient braking torque between the blank and the arrangement for fastening the blank.

Besides, this will ensure a slight friction between the antifriction bearing and the blank contact surface, thereby precluding relative slipping between the antifriction bearing and the blank at places of application of clamping force, which, in turn, preserves good condition of the surface of the blank being treated. Use of heatinsulating caps for protecting antifriction bearings against heat liberated during rotary friction is equired to prevent overheating of antifriction bearings and ensure a long service life thereof.

It is favourable that the machine for processing rubber articles in the form of bodies of revolution has brackets of the devices for securing the blank mounted on the bed relative to each other so as to allow the distance therebetween to be adjusted, which will make possible processing groups of articles of standard dimensions by adjusting the distance from the axis of rotation of the arrangement for fastening the blank.

It is expedient that the machine for processing rubber articles in the form of bodies of revolution has each device for setting and securing a suitable cutting tool provided with a housing to accommodate a holder of the cutting tool, placed inside a spring, the housing being installed in a manner offering the possibility for the adjustment thereof in height on an independent bracket secured on the bed, which will allow spatial position of the cutting tool to be altered both during adjustment for different standard dimensions of blanks being processed and in the course of auxiliary adjustment (correction of the value of plunge cutting of the tool) with the machine operating, thereby ensuring safe operation and precise dimension of the surface being processed even with a slight wear of the cutting tool.

Besides, presence of the spring ensures reliable trouble-free operation of the machine even in the event of sudden disappearance of the pneumatic medium actuating the cutting tools.

It is favourable that the machine for processing rubber articles in the form of bodies of revolution has brackets of each device for securing a suitable cutting tool mounted on the bed relative to each other in a manner offering the possibility for adjusting the distance therebetween, which allows the machine to be used for processing rubber articles of different standard dimensions for adjusting the distance relative to the blanks being processed.

It is desirable that the machine for processing rubber articles in the form of bodies of revolution has each cutting tool fixed in the holder in a manner offering the possibility for the tool to rotate around its axis through the use of a screw joint in order to simplify the design of the movable cutting tool.

Besides, rotation of the cutting tool increases the length of the working surface thereof and improves heat-dissipation, thereby extending the life of the cutting tool and the efficiency and endurance thereof. Fitting the cutting tool in the holder allows the former to be re-set with the purpose of full utilization of the material of the cutting tool.

It is favourable that the machine for processing rubber articles in the form of bodies of revolution has said screw joint made in the form of a screw pair consisting of a groove provided on the surface of the holder of a suitable cutting tool and a boss fitting said groove, located on the housing of the device for securing a suitable cutting tool, which will furnish the simplest design of the screw joint with a complicated pattern of working motions of the cutting tool.

Besides, the helical motion of the cutting tool ensures slow penetration thereof into the working zone with rather limited duration of the plunge-cut cycle, which promotes the longest contact between the cutting tool and the surfaces being treated, thereby improving the quality of processing.

It is advantageous that the machine for processing rubber article in the form of bodies of revolution has the working surfaces of each cutting tool made in the form of a cylinder with the rounded end, which is necessary to ensure normal penetration of the rotating and axially moving cutting tool into the surface being processed. The rounded end of the working surface of each cutting tool promotes gradual penetration of the axially moving tool into the resilient edge of the blank, the resultant recoverable elastic strain allowing the material of the blank to be continuously removed in the course of processing.

It is desirable that the machine for processing rubber articles in the form of bodies of revolution has each drive for imparting axial motion to each suitable cutting tool made pneumatic in order to ensure the simplest mechanical cycle association between the cutting tools and the blank being treated.

It is advisable that the machine for processing rubber articles in the form of bodies of revolution has the drive for imparting reciprocating motion to the mechanism for gripping the blank and that for imparting reciprocating motion to the pusher made in the form of link gears, which will make possible the use of the most practicable and simple means to develop mechanisms contributing to compact arrangement of the machine components and ensuring cycle association of actuating mechanisms driven by the distributing shaft. The most essential condition is gradual displacement of the blanks being processed in order to obviate the possibility of sharp impact loads being applied thereto.

Reinforced rubber blanks with regular geometric shape and dimensions tend to distort even with small dynamic loads being applied thereto.

Besides, rubber blanks with high coefficient of friction, when in contact with other materials, fail to move smoothly when gripped from the charging device to be fed to the arrangement for fastening the blank.

After processing a rubber blank, e.g. reinforced collar for sealing shafts of mechanisms and machines the former is sent to be fitted with a spring ring.

With dissociated operations of mechanical treatment of the blank and fitting it with a spring ring, said operations are performed on different machines. In the production line said machines are arranged in a definite sequence, each fulfilling its specific functions. The system of machines arranged in a process line takes up considerable production areas and complicates the general design layout, inter-operation handling of articles, and upkeep and maintenance of the machines. On the whole, said system reduces the output per unit of production area.

With dissociated operations in a mechanized production line the blank, prior to be processed and fitted with a spring ring, should be oriented in a definite way. Repeated mechanical action on the reinforced collar blank of regular geometric shape results in deformation thereof, thereby increasing production losses and reducing high quality output.

It is, therefore, favourable that the machine for processing rubber articles in the form of bodies of revolution, e.g. reinforced collars for sealing shafts of mechanisms and machines, has mounted on the bed a hopper for keeping spring rings with a device for dropping the same onto a processed collar blank, disposed above the pusher coaxially therewith, and a mechanism for slipping a spring ring onto said blank, located after the pusher coaxially therewith, which makes it possible to combine related operations of the production process in one unit, wherein once oriented collar blank goes through the entire set of operations.

Besides, labour consumption for processing the articles is reduced and production area economized, i.e. the output per unit of production area is increased.

The design of the machine made according to the invention allows labour productivity to be increased by automation of all working processes and combining related operations of the production process (mechanical treatment of the collar blank and providing it with a spring ring). As a result of obviating numerous manual operations and of the necessity for the operator to have access to the working zone of the machine, the output per unit of production area is increased, the quality of processing and the conditions of work are improved, and safety of operation enhanced.

Automation of production processes enables the operator to attend to multiple machines at a time, his work actually consisting in observing the operation of the machine and periodically replenishing the charging device with collar blanks and the hopper with spring rings.

The invention will now be described with reference to a specific embodiment thereof taken in conjunction with the accompanying drawings, wherein: Fig. 1 illustrates a general partially cut-away view of a machine for processing rubber articles in the form of bodies of revolution, according to the invention; Fig. 2 is a schematic plan view of a machine with three devices for securing suitable cutting tools, according to the invention; Fig. 3 is a side elevation, on the side of slippingon of spring rings, of a machine without devices for setting and securing suitable cutting tools, according to the invention; Fig. 4 is a schematic representation of a device for setting and securing a suitable cutting tool, according to the invention; Fig. 5 is a section taken on line Y-Y in Fig. 4.

According to the invention, the proposed machine has mounted on a bed 1 (Fig. 1) a charging device 2 which may be of any construction known in the prior art.

In the present embodiment the charging device 2 is made in the form of a vibrating hopper having an electromagnetic drive (not shown). The charging device 2 is intended for feeding a blank 3 of an article to a mechanism 4 for gripping the blank 3, mounted on the bed 1, having a reciprocating motion drive 5 and intended for shifting the blank 3 to an arrangement 6 for fastening the blank 3.

The gripping mechanism 4 is actually a grip 7 secured on a carriage 8 capable of moving with the aid of rollers 9 along guides 10 secured on the bed 1.

The reciprocating motion drive 5 is meant for moving the blanks 3 to the arrangement 6 for fastening the blank 3, provided with a drive 11 for imparting rotary and a drive 12 for imparting reciprocating motion thereto, with the blank 3 mounted thereon, which latter is processed during rotation by a set of cutting tools 13 to be pushed after processing by a pusher 14 located on the bed 1 after the arrangement 6 for fastening the blank 3 and provided with a drive 15 for imparting reciprocating motion thereto, the drive 12 for imparting reciprocating motion to the arrangement 6 for fastening the blank 3, each drive 16 for imparting axial motion to each suitable cutting tool 13, the drive 5 for imparting reciprocating motion to the mechanism 4 for gripping the blank 3 and the drive 15 for imparting reciprocating motion to the pusher 14 being kinematically associated with a distributing shaft 17 rotatable by a motor 18 also coupled with the drive 11 for imparting rotary motion to the arrangement 6 for fastening the blank 3.

Kinematic association of all the drives 12, 1 6, 5 and 15 with the distributing shaft 17 rotatable by the motor 18 imparting rotary motion to the drive 11 contributes to automation of all processes in treating the blank, thereby raising labour productivity. Besides, automation of the treatment process allows the output per unit of production area to be increased and enables the operator to attend to multiple machines at a time.

As a result of obviating numerous manual operations and of the necessity for the operator to have access to the working zone of the machine, the quality of processing rubber articles and the conditions of work are improved and safety of operation enhanced.

Kinematic association of the motor 18 and the drive 11 for imparting rotary motion to the arrangement 6 for fastening the blank is accomplished as follows. The motor 18 actuates a driven pulley 22 coupled with a sleeve 23 of the arrangement 6 for fastening the blank 3 through an intermediate shaft 19 with the end thereof mounting a driving pulley 20 by means of a belt drive 21.

The arrangement 6 for fastening the blank 3 vertically mounted on the bed 1 represents a spindle 24 enclosed in the sleeve 23 rotatable around its axis.

Such a location of the arrangement 6 for fastening the blank 3 ensures a vertical location of the axis of rotation of the blank 3 being processed, which permits the blank 3 to assume the most stable spatial position, thereby simplifying orientation and feeding the blank 3 to the treatment zone. Such a location of the blank 3 is also favourable for subsequent shifting of the blank 3 after processing.

The motor 18 is associated with a driven gear 26 through the intermediate shaft 19 mounting a driving gear 25. The gear 26 is fitted on a driven shaft 27 mounted on the bed 1 and coupled with a reduction gear 29 by means of an elastic coupling 28.

The reduction gear 29 has a shaft 30 with two output ends, one of which mounts a cam 31 coupled with a pneumatic switch 32 and the other carries a driving bevel gear 33 housing the end of the distributing shaft 17. The distributing shaft 17 is mounted on the bed 1 by means of bearing assemblies 34 with a cam 35 kinematically associated with a lever 36 fixed therebetween.

The lever 36 is connected with a housing 37 of the reciprocating motion drive 12 of the arrangement 6 for fastening the blank 3. Installed in said housing 37 with the aid of a bearing 38 and nuts 39 and 40 is in the end of the spindle 24.

The spindle 24 is enclosed in the sleeve 23 and is associated therewith through a feather key 41.

The sleeve 23 can rotate around its axis with.the aid of bearings 42 secured with a nut 43.

A compensating washer 44 is fitted on the bed 1 coaxially with the spindle 24, thereby ensuring stable centring of the rotating blank 3 after processing at the moment of braking, when contacting the stationary surface of the machine bed 1, by killing the kinetic energy of the rotating processed blank.

Besides, as a result of a continuing momentary rotation of the processed blank 3 jointly with the compensating washer 44 during braking, the bearing surface of the processed blank 3 is protected against mechanical damage (scores, scratches, etc.).

Installed on the bed 1 above the arrangement 6 for fastening the blank 3 are two devices 45 for securing the blank 3 in the course of processing thereof on the arrangement 6 for fastening the blank 3. Said devices 45 for securing the blank 3 are arranged on the bed 1 symmetrically with the axis of rotation of the blank 3. Each device 45 for securing the blank 3 includes an antifriction bearing (not shown) enclosed in a heat-insulating cap 46 mounted on a mandrel 47 (Figs. 2 and 3) hingedly connected with a bracket 48 fixed on the bed 1.

Such a construction of each device 45 for securing the blank 3 ensures a reliable pressing of the blank 3 being processed in the course of rotation to the arrangement 6 for fastening the blank 3 and builds up a sufficient braking torque between the blank 3 and the arrangement for fastening the blank 3.

Besides, such a construction of the device 45 for securing the blank 3 ensures a slight friction between the heat-insulating cap 46 wherein the antifriction bearing is enclosed and the contact surface of the blank 3, thereby precluding relative slipping between the heat-insulating cap 46 and the blank 3, which, in turn, preserves good condition of the surface of the blank 3 under treatment. Use of the heat-insulating caps 46 for protecting antifriction bearings against heat liberated during rotary friction is required to prevent overheating of the antifriction bearings and ensure a long service life thereof.

The present embodiment shows two devices 45 for securing the blank 3 in the course of processing on the arrangement 6 for fastening thd blank 3. However, the number of such devices 45 is optional, conditioned by the best way of fastening the blank 3 in the course of processing the latter on the arrangement 6 for fastening the blank 3.

Brackets 48 (Fig. 2) of the devices 45 for securing the blank 3 are fixed on the bed 1 relative to each other in a manner offering the possibility to adjust the distance therebetween, which makes it possible to use the machine for processing the blanks 3 of different standard dimensions.

The bed 1 carries three devices 49 for setting and securing three respective cutting tools 13.

Said devices 49 are arranged around the blank 3 installed on the arrangement 6 for fastening the blank 3.

A horizontal plane (Fig. 2) shows three devices 49 for securing the cutting tools 13, disposed in different sectors of the circumference whose centre is in the axis of rotation of the blank 3, which ensures compactness of the machine construction and the most optimal version of applying the forces produced by the cutting tools in the course of processing the blank.

However, the number of such devices 49 is optional, determined by the best manner of processing the rubber blank 3.

Each device 49 for setting and securing a suitable cutting tool 13 includes a housing 50 (Figs. 4 and 5) accommodating a holder 51 for the cutting tool 13 (Fig. 4), placed inside a spring 52 (Fig. 5), the housing 50 being installed with the possibility of being adjusted in height on a bracket 53 thereof fastened on the bed 1.

Adjustment of the housing 50 in height on the bracket 53 thereof is possible due to the presence of an axially fixed screw 54 in the housing 50 and of a guide nut 55 on the bracket 53. The T-shaped guide nut 55 has a slot receiving strips 56 attached to the housing 50 by screws 57. Lock screws 58 fix the housing 50 on the bracket 53 following the adjustment of the height of the cutting tools 13.

Such a design of the devices 49 (Figs. 4 and 5) for setting and securing a suitable cutting tool 13 allows spatial position of each cutting tool 13 to be altered both during adjustment for different standard dimensions of the blanks 3 (Fig. 1) being processed and in the course of auxiliary adjustment (correction of the value of penetration of the cutting tool 13) with the machine operating, thereby ensuring safe operation of the machine and precise dimensions of the surface of the blank 3 being treated even with a slight wear of the cutting tool 13.

Besides, the presence of the spring 52 (Figs. 4 and 5) ensures reliable trouble-free operation of the machine in the event of a sudden disappearance of the pneumatic medium actuating the cutting tools 13.

The brackets 53 of the devices 49 for securing a suitable cutting tool 13 are fastened on the bed 1 relative to each other in a manner offering a means for the distance therebetween to be adjusted, thereby making possible the use of the machine for processing the blanks 3 (Fig. 1) of different standard dimensions.

Each cutting tool 13 (Figs. 4 and 5) is fitted in the suitable holder 51 in a manner offering the possibility to rotate around its axis through the use of a screw joint.

Each cutting tool 13 (Figs. 4 and 5) is fitted in the suitable holder 51 in a manner offering the possibility to rotate around its axis through the use of a screw joint.

The screw joint is a screw pair consisting of a groove 59 provided on the surface of the holder 51 of the suitable cutting tool 13 and a boss 60 fitting said groove 59, located on the housing 50 of the device 49 for securing the cutting tool 13.

Rotary motion of the cutting tool 13 increases the length of the working surface thereof, thereby improving heat-dissipation, which, in turn, extends the life of the cutting tool 13 and the efficiency and endurance thereof.

Fitting each cutting tool 13 in a suitable holder 51 allows the former to be re-set with the purpose of full utilization of the material of each cutting tool 13.

Besides, the helical motion of each cutting tool 13 ensures slow penetration thereof into the working zone with a rather limited duration of the plunge-cut cycle, which promotes the longest contact between each cutting tool 13 and the surface of the blank 3 (Fig.1) being treated, thereby improving the quality of processing.

In the given embodiment the working surface of each cutting tool 13 (Fig. 4) is made in the form of a cylinder with the rounded end, which is necessary to ensure normal penetration of the rotating and axially moving cutting tool 13 (Fig. 1) into the surface of the blank 3 being treated. The rounded end of the working surface of each cutting tool 13 promotes gradual penetration of the axially moving tool into the resilient edge of the blank 3, the resultant recoverable elastic strain allowing the material of the blank 3 to be continuously removed in the course of processing.

Each drive 16 (Figs. 4 and 5) for imparting axial motion to each suitable cutting tool 13 is made pneumatic and contains a sleeve 61 located in the housing 50 of the device 49 for securing the cutting tool 13. The sleeve 61 houses a cup 62 with the ends thereof carrying bearings 63 associated with the holder 51 of the cutting tool 13. Placed between the sleeve 61 and the cup 62 is a sealing ring 64. The cup 62 is closed with a cover 65. The side of the sleeve 61 opposite to the holder carries a cover 66 with a union 67 connected with the pneumatic switch 32 (Fig. 1).

Making each drive 16 pneumatic ensures the simplest mechanical association between the cutting tools 13 and the blank 3 being treated.

However, each drive 1 6 (Figs. 4 and 5) for imparting axial motion to each suitable cutting tool 13 may be of any design known in the prior art.

The drive 5 (fig. 1) for imparting reciprocating motion to the mechanism 4 for gripping the blank 3 and the drive 15 for imparting reciprocating motion to the pusher 14 are made in the form of link gears.

The drive 5 for imparting reciprocating motion to the mechanism 4 for gripping the blank 3 in the direction of the arrangement 6 for fastening the blank 3 contains a link 68 hingedly installed on the bed 1 and associated with the carriage 8.

The slot of the link 68 receives a slide block 69 hingedly coupled with the end of a crank 70 secured on a driven bevel gear 71 meshed with the driving bevel gear 33 and mounted on the bed 1.

The drive 15 for imparting reciprocating motion to the pusher 14 comprises a link 72 (Fig.3) with one end thereof associated with the pusher 14 and the other hingedly secured on the bed 1. The slot of the link 72 receives a slide block 73 hingedly connected with the end of a crank 74 fixed on the distributing shaft 17.

Another embodiment of a machine for processing rubber articles in the form of bodies of revolution, e.g. reinforced collars 75 for sealing shafts of mechanisms and machines, and subsequently fitting them with spring rings 76 has mounted on the bed 1 (Fig.3) a hopper 77 for keeping the spring rings 76 with a device 78 for dropping the same onto the processed collar blank 75, disposed above the pusher 14 coaxially therewith, and a mechanism 79 for slipping the spring ring 76 on said collar blank 75, located after the pusher coaxially therewith.

The device 78 for dropping the spring rings 76 onto the processed collar blank 75 includes a curvilinear chute 80 secured on the bed 1 through a post 81, and a splitter 82 of the spring rings 76.

The mechanism 79 for slipping the spring ring 76 onto the collar blank 75 contains a T-shaped plate 83 with a curvilinear working edge, said plate 83 being mounted on a pin 84 through bracket 85 fixed on the bed 1. The plate 83 (Fig. 2) is controlled by a spring 86 with one end thereof secured on the plate 83 and the other on one of the brackets 85.

The foregoing embodiment of the machine makes it possible to combine related operations of the production process in one unit, wherein once oriented collar blank 75 goes through the entire set of operations.

Besides, labour consumption for processing the articles is reduced and production area economized, i.e. the output per unit of production area is increased.

The machine for processing rubber articles in the form of bodies of revolution operates as follows.

The blanks 3 to be processed are placed in the charging device 2, and the latter is switched on. A continuous chain of the blanks 3 is fed to the gripping mechanism 4.

Then the motor 18 is turned on to impart rotary motion to the spindle 24 of the arrangement 6 for fastening the blank 3. Rotary motion to the spindle imparting rotary motion to the arrangement 6 for fastening the blank 3. Rotary motion to the pindle 24 is imparted by the driven pulley 22 with the sleeve 23 and the feather key 41. Simultaneously, the spindle 24 of the arrangement 6 for fastening the blank 3 is imparted reciprocating motion by the drive 12 with a time lag in the uppermost and the lowermost positions of the arrangement 6 for fastening the blank 3.

At the same time, the gripping mechanism 4 starts reciprocating in the following sequence: the driving gear 25 and the driven gear 26 impart rotary motion through the intermediate shaft 27 and the elastic coupling 28 from the motor 18 to the reduction gear 29, the output shaft 30 whereof is connected with the driving bevel gear 33 meshed with the driven bevel gear 71 mounting the crank 70.The rotating crank 70 rocks the link 68 through the slide block 69 relative to the lower hinge secured on the bed 1. The upper end of the link 68 reciprocates the carriage 8 with the aid of rollers 9 moving along the guides 10, whereat joint motion of the grip 7 ; and the drive 1 5 of the pusher 14 occurs with a phase shift of nearly 1800 in such a manner that, with the gripping mechanism 4 approaching the extreme left position, the spindle 24 of the arrangement 6 for fastening the blank 3 is immobilized in the lowermost position.

During the standstill of the spindle 24 in the uppermost position each cutting tool 13 performs one double stroke: forward stroke actuated by the drive 16 for imparting axial motion to each cutting tool 13 and backward stroke actuated by the compressed spring 52 fitted on the holder 51 of the cutting tool 13.

With the grip 7 moving from the extreme right position to the left, one blank 3 is gripped from the charging device 2 to be fed to the arrangement 6 for fastening the blank 3 until their axes align.

The rotating spindle 24 grips the blank 3 on the upward stroke and centres the same.

Simultaneously, the device 45 for securing the blank 3 presses the latter to the spindle 24.

Following this, the rotating blank 3 assumes the uppermost position to rotate therein for a certain time.

With the rotating blank 3 in the uppermost position, the cutting tools 13 approach the former from different directions, process the same and withdraw simultaneously. The blank 3 pressed to the spindle 24 by the device 45 for securing the blank 3 goes down together with them.

As this takes place, the blank 3 is first lowered onto the compensating washer 44, whereas the spindle 24 proceeds to go down to be liberated from the processed blank 3.

The processed blank 3 is braked by the compensating washer 44, and the next blank 3 is gripped by the grip 7 to push the processed blank 3 to a distance equal to the outer diameter of the latter.

The pusher 14 shifts the processed blank 3 along the surface of the bed 1 in the transverse direction.

In the course of mechanical treatment of the blank 3, it is possible to adjust the value of penetration of each cutting tool 13 by clockwise or counterclockwise rotation of the screw 54 fixed~ in the axial direction.

To this end, prior to adjusting the cutting tools 13 in height, the lock screws 58 are loosened to be re-tightened after the adjustment for the cutting tools 13 to assume a stable position relative to the blank 3.

In case of wear or blunting of the working surface of the cutting tool 13, the latter is reinstalled on a different sector of the circumference whereon said cutting tools 13 are arranged.

The pneumatic switch 32 ensures the working stroke for each cutting tool 13 by supplying compressed air into the drive 16 for imparting axial motion to the cutting tool 13, whose backward stroke is effected through the spring 52 fitted on the holder 51, the screw pair in the form of the groove 59 receiving the boss 60 provides a simultaneous turn for the cutting tool 13 around its longitudinal axis.

In the event of the embodiment of the machine intended for processing reinforced collars 75 operation is effected in the manner hereinabove set forth, with the difference that the spring rings 76 are charged into the hopper 77 for keeping spring rings 76.

The hopper 77 is switched on, following which the spring rings 76 intended for assembly with the reinforced collars 75 are fed to the device 78 for dropping thereof. One spring ring 76 is supplied for the collar 75 to be shifted to the mechanism 79 for slipping the spring rings onto the collars by means of the splitter 82.

The pusher 14 displaces the collar blank 75, whereas the curvilinear surface of the T-shaped plate 83 presses the spring ring 76 to the collar 75, thereby assembling the two. During the subsequent stroke of the pusher 14 the preceding collar together with the spring ring 76 fitted thereon is pushed off the bed 1 of the machine.

The operation cycle of the machine is automated, the work of an operator actually consisting in periodically replenishing the charging device 2 with blanks 3 and the hopper 77 with spring rings 76, and in observing the operation of the machine and periodically adjusting the cutting tools 13.

The operating cycle may be calculated in such a way that processing the blank and fitting it with the spring ring will take a maximum of three seconds.

Depending on the standard dimension of the article to be processed, the capacity of the machine may be changed by varying the speed of rotation of the distributing shaft 17.

Claims (16)

1. A machine for processing rubber articles in the form of bodies of revolution, comprising a bed mounted whereon are: a charging device for feeding a blank of the article; a mechanism for gripping the blank having a reciprocating motion drive and intended for shifting the blank from said charging device; and arrangement for fastening the blank, having a drive for imparting rotary and a drive for imparting reciprocating motion thereto; a plurality of devices for securing said blank during treatment in said arrangement for fastening the blank; a plurality of devices for setting and securing cutting tools to process the blank, each intended for securing a suitable cutting tool and having a drive for imparting axial motion to the suitable cutting tool; a pusher disposed on said bed after said arrangement for fastening the blank and having a drive for imparting reciprocating motion thereto, the drive for imparting reciprocating motion to said arrangement for fastening the blank, each said drive for imparting axial motion to each corresponding cutting tool, the drive for imparting reciprocating motion to said mechanism for gripping the blank and the drive for imparting reciprocating motion to said pusher being kinematically associated with a distributing shaft rotatable by a motor also coupled with the drive for imparting rotary motion to said arrangement for fastening the blank.

2. A machine as claimed in claim 1, wherein said arrangement for fastening the blank is mounted on the bed in a vertical manner.

3. A machine as claimed in claim 1 or 2, wherein said arrangement for fastening the blank is made in the form of a spindle located in a sleeve rotatable around its axis.

4. A machine as claimed in claim 1 or 2 or 3, wherein said drive for imparting reciprocating motion to the arrangement for fastening the blank is made in the form of a lever-and-cam mechanism.

5. A machine as claimed in claim 3 or 4, wherein a compensating washer is installed on the bed coaxially with the spindle.

6. A machine as claimed in any of the claims 1-5, wherein each device for securing the blank is provided with an antifriction bearing pressing said blank to the arrangement for fastening the blank, disposed inside a heat-insulating cap and mounted on a mandrel hingedly connected with a bracket secured on said bed.

7. A machine as claimed in claim 6, wherein brackets of said devices for securing the blank are mounted on said bed relative to each other so as to allow the distance therebetween to be adjusted.

8. A machine as claimed in any of the claims 1-7, wherein each said device for setting and securing a suitable cutting tool is provided with a housing to accommodate a holder of the cutting tool placed inside a spring, said housing being installed in a manner offering the possibility for the adjustment thereof in height on an independent bracket secured on said bed.

9. A machine as claimed in claim 8, wherein each said bracket of each said device for securing a suitable cutting tool is mounted on the bed relative to each other in a manner offering the possibility for adjusting the distance therebetween.

10. A machine as claimed in claim 9, wherein each cutting tool is fixed in said suitable holder in a manner offering the possibility for said tool to rotate around its axis through the use of a screw joint.

11. A machine as claimed in claim 10, wherein the screw joint is made in the form of a screw pair consisting of a groove provided on the surface of said holder of the suitable cutting tool and a boss fitting said groove, located on said housing of each said device for securing the suitable cutting tool.

12. A machine as claimed in any of the claims 1-11, wherein the working surface of each cutting tool is made in the form of a cylinder with the rounded end.

13. A machine as claimed in any of claims 1-12, wherein each drive for imparting axial motion to each suitable cutting tool is made pneumatic.

14. A machine as claimed in any of the claims 1-13, wherein the drive for imparting reciprocating motion to said mechanism for gripping the blank and that for imparting reciprocating motion to the pusher are made in the form of link gears.

15. A machine for processing rubber articles in the form of bodies or revolution as claimed in any of the claims 1-14, e.g. reinforced collars for sealing shafts of mechanisms and machines, wherein mounted on said bed is a hopper for keeping spring rings with a device for dropping the same onto the processed collar blank, disposed - above said pusher coaxially therewith, and a mechanism for slipping a spring ring onto said blank, located after said pusher coaxially therewith.

16. A machine for processing rubber articles in the form of bodies of revolution, substantially as described in the embodiments thereof and in the accompanying drawings.