Piercing unit for the manufacture of workpieces, particularly workpieces railway wheels

 

(57) Abstract:

Usage: metal forming, in particular the design of the piercing device for casting of railway wheels. Piercing unit contains press, the conveyor and the means of feeding and cleaning of the workpieces relative to the axis of the firmware. The means of feeding and cleaning of workpieces on the axis of the firmware is executed in a separate drive section of the roller conveyor. The section consists of two parts located opposite relative to each other and forming an aperture. Each piece is mounted on the drive trolley can be moved in mutually opposite directions. The movable press table is made with a driving focus. The emphasis has vertical movement in the frame above the rollers of the section of the conveyor and interaction with the workpiece. 3 Il.

The invention relates to the field of metal forming, and more particularly to structures bonding device for manufacturing workpieces, particularly workpieces railway wheels.

Known hydraulic broaching press, containing a frame, a stationary and placed on a movable table, a presser-bar to the actuator and the lifting cylinders.
This press has a low performance due to the fact that the workpiece on the axis of the firmware and is fed back by the stroke of the movable table. The press is a significant productive area, loading and cleaning of the workpieces on the table are special machines that take up additional space, in addition, the constant movement of the sliding table is associated with increased wear his guides and stops.

Known tufting press with lower drive force 1000 TC composition forging-rolling line for the production of wheel blanks [2]

This press is equipped with a transitional roller table on which the workpiece is filed under press. Before flashing the bottom tool (matrix), rising from under the roller table, based on the lower face of the hub of the workpiece, moving it above the conveyor until it stops at the top of the punch. In the process of firmware upper face of the hub of the workpiece abuts against the hard shaft of a punch, which provides the firmware of the holes in the hub as soon as the workpiece begins to serve up when you enable the working cylinder.

The disadvantages of this press include:

poor performance by increasing the time for tool change due to otsutstviyem aliganga, what worsens the conditions, in addition, reduced reliability and durability of the stationary section of the conveyor is located in the working space of the press as during cooling of the upper and lower tools, the coolant will get into the bearing assemblies.

Known tufting machine for making blanks of railway wheels, which contains hydraulic broaching press with a movable table, a die-holder with a bonding matrix and centering body, a transport device for feeding blanks to the press, made in the form of rollers, and means for feeding blanks to the axis of the firmware is executed and the form of transfer units blanks [3]

The disadvantages of this press is that it has a low productivity.

The invention is aimed at improving the performance of the piercing unit and the improvement of the conditions for its operation.

This problem is solved due to the fact that the piercing unit for the manufacture of workpieces, particularly workpieces railway wheels, includes hydraulic broaching press with a movable table, a die-holder with a bonding matrix and centering body of the transport device is oshibki, where the means of feeding and cleaning preparations made in the form of a separate drive section of the roller conveyor consisting of two parts located opposite one relative to another to form an aperture, and each part is mounted on the drive trolley can be moved in mutually opposite directions along the guides located on the movable table, which is made with a driving focus, established with the possibility of vertical movement in the doorway and interaction with the workpiece at its upper point lying above the plane of the roller section of the roller conveyor.

The invention is illustrated by drawings, where Fig. 1 shows a General view of the piercing unit in plan; Fig. 2 section a-a in Fig. 1; Fig. 3 - section b-B in Fig. 1.

Piercing Assembly includes hydraulic broaching press 1 with a clamping head plate 2, the piercing punch 3, a movable table 4, on which is mounted a housing 5 with the die-holder 6, matrix 7, centroptilum 8 and unit 9 for receiving and removal of drilled otters. Separate the drive section of the conveyor is made of two parts 10 and 11, located opposite one relative to another with the formation of the opening 12. Each of the parts 10, 11 what's on the movable table 4 of the press. Trucks have actuators in the form of a pneumatic cylinder 18 and 19. Centrovital 8 blanks made in the form of a truncated cone and is mounted in the upper part of the die-holder 6. Rolling table 4 may be ejected from the press with all located on the mechanisms and to return to its original position by means of a hydraulic cylinder 20.

The device 9 reception and cleaning otters made in the form of a rod 21 with a blind hole 22 and side window 23, the mating side of the bottom 24 of the inclined plane 25, and the rod 21 is sent with the possibility of vertical movement of the lift 26 in the housing 5, is rigidly fixed to the table 4 and provided with the appropriate side window 27; for further transmission otters in the duct 28 is provided an inclined storage 29 mounted on the lower cross member of the press. In addition, the housing 5 is mounted the drive stop 30 with the possibility of vertical movement over the rollers of the parts 10, 11 of the section of the roller conveyor by means of the pneumatic cylinder 31. For feeding the workpiece 32 to the press serves as the feed section of the conveyor 33, and to remove the sewn workpiece from the press serves as the cleaning section of the conveyor 34.

Piercing unit operates as follows. The workpiece 32 by the feed section of the conveyor 33 is transmitted to that raised by the pneumatic cylinder 31 into the opening 12 above the rollers of the roller conveyor, stopping along the axis of the press. The workpiece 32 is pre-formed in the previous units and has a protruding hub facing down.

Lift 26 is making the move up, interacting via an intermediate lifters on the rod 21, which when lifting first concerns centroptilum 8 (truncated cone) of the outer surface of the hub of the workpiece 32, producing alignment of the workpiece relative to the matrix 7, and then removes the workpiece from the rollers of the parts 10 and 11 of the roller conveyor, which with the help of rail carriages 15 and 16 of the pneumatic cylinders 18 and 19 are bred in the end position, freeing the working area of the press; drive stop 30 from the cylinder 31 is lowered into the lower position. Then lift 26 lowers the bar 21 and the workpiece 32, resting the bottom end of the hub on the die-holder 6 and matrix 7, in the lower operating position.

Next is performed first workpiece clamp 32 presser bar 2 press, then touch the workpiece by the punch 3, and then working stroke of the press the stitched workpiece, the punch 3 passes through the matrix 7, pushing the otter through the hole of the die-holder 6 and the cavity of the holes 22 of the rod 21, while the otter falls on an inclined plane 25, trickles down Steno is unloaded.

After flashing the workpiece is lifted off the lift 26, cantilever rollers parts 10 and 11 of the roller conveyor are brought into the working area under the workpiece 32, which lift 26 is lowered in the usual rollers of the roller conveyor and being led away from the press for cleaning a section of the conveyor 34 and further technology; then the cycle on the unit can be repeated. When the cooling water tool, and replacement rollers parts 10 and 11 of the conveyor is also divorced.

The tool change is performed as follows. Punch 3 stroke of the press slide is lowered into the matrix 7, unsnaps from the slider and move the sliding table 4 by means of the hydraulic cylinder 20 is pulled out from under the press in the area available for servicing an overhead crane, which is the replacement tool. The use of a sliding section of the roller conveyor mounted on the movable table of the press, can dramatically reduce the time of tool changing, reducing in this regard, downtime, thereby increasing the overall performance of the unit, and also greatly improves the working conditions of press machinery and service as the working area of the press and roller conveyors.

Tufting machine for making blanks, mainly is the motor with the bonding matrix and centering body, transport feeder blanks to the press in the form of a roller table, means for feeding and cleaning of the workpieces relative to the axis of the firmware, wherein the means for supplying and cleaning preparations made in the form of a separate drive section of the roller conveyor consisting of two parts located opposite one relative to another to form an aperture, and each part is mounted on the drive trolley can be moved in mutually opposite directions along the guides located on the movable table, which is made with a driving focus, established with the possibility of vertical movement in the doorway and interaction with the workpiece at its upper point, lying above the plane of the roller section of the roller conveyor.

 

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FIELD: tube production processes and equipment, possibly presses for piercing ingots cast by siphon way to sleeves.

SUBSTANCE: on working surface of head of piercing punch cone recess is formed. Dimensions of said recess are determined by next relations: Hd = (0.08 -0.15)Dp ; Db =(0.25 - 0.95)Dp; α = 30 - 45° where Hd - depth of recess; Dp - diameter of punch; Db - diameter of base of cone recess on working end of punch head; α - inclination angle of recess generatrix. It provides displacement of significant volume of more dense and more pure metal from bottom part of ingot to its mostly contaminated and low-density head part.

EFFECT: lowered number of flaws in tubes.

5 dwg

FIELD: machine engineering, possibly forming in parts deep rectangular openings by plastic working.

SUBSTANCE: rectangular broach-gage includes hyperbolic working surface and rectangular sharply pointed edge. Such sharply pointed edge forms tooth arranged along perimeter of deep rectangular opening.

EFFECT: improved operational reliability of tool, enhanced quality and accuracy of articles with such openings.

1 dwg

FIELD: technological processes.

SUBSTANCE: by means of preliminary hammer stamping, preliminary forged piece is produced with tapered hub piece. Then final forged piece is molded with tapered hub piece by stamping in trimming press with burr cutting and punching of deep cavity. Heights of hub portions in preliminary and final forged pieces are equal to each other. Angle of preliminary forged piece hub portion taper exceeds angle of final forged piece tapered hub portion cone. At that difference between volume of tapered cone that creates tapered hub portion of preliminary forged piece and volume of truncated taper that creates tapered hub portion of final forged piece, is equal to volume of punched deep cavity. Punching is done with expansion of preliminary forged piece hub portion.

EFFECT: higher quality of forged pieces and lower power inputs in their manufacture.

4 dwg

FIELD: technological processes.

SUBSTANCE: processed part is opened in core area with the help of serial forging deformations displaced at the angle relative to each other around part axis and simultaneously is placed on piercer. At that in process of forging deformations processed part is pressed to piercer with previously specified force, and piercer is moved towards this axial force, and in intervals between forging deformations following one after another it is returned in initial position synchronously with axial feed of processed part. Method is realised in device that comprises at least two forging tools that are diametrically opposite in relation to processed part, grip head with end support, axial feed and rotary drives. There is also piercer that moves axially with the help of actuator from the side of forging tools, and also working cylinder that serves for support of processed part.

EFFECT: improved quality of piercing.

9 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: work piece is broached in cold condition with upper and lower deforming tools. Broaching is carried out in two stages. One of deforming tools initially performs progressive motion to the moment of rapid increase of deforming force and makes a bridge. Ratio of bridge thickness to diameter of the deforming tool is 1/3…1/4. Further, the same deforming tool performs progressive motion simultaneously with its rotation or with rotation of the second deforming tool. Deforming tools of various diameter are used for fabrication of parts with stepped internal surface.

EFFECT: reduced metal consumption for fabrication of bush.

4 dwg, 1 ex

FIELD: process engineering.

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EFFECT: uniform filling of mould cavities, higher quality of moulded articles.

2 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to metal deformation processes and can be used for production of large seamless pipes on hydraulic presses. The ingot is calibrated by pushing it through a ring matrix. The matrix is made by the conical piercing container lower base diameter. At the same time the bar bottom part is deformed to form a mark in the centre. Then the bar is pressed in a conical piercing container on the side of the bar mark when it is centred along the container axis. At the same time in the centre of the pressed bar a mark is made for a piercing punch. Then at least one piercing is made on the side of the pressed bar bottom part. The resultant pierced bar is subjected to pulling.

EFFECT: reduced variation in wall thickness in the received tubes, reduced metal consumption, and complexity of manufacturing and expansion of assortment of tube lengths.

4 dwg, 2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy, particularly, to production of thin-wall pipes. Proposed method comprises forming and piercing of solid ingot in container insert by its needle, press ring plate and press ram, as well as quenching, straightening and artificial ageing. Prior to forming with piercing, ingot arranged in said contained is compacted by cupped blank arranged between said ring plate and ram at the needle with aligned ends of the needle and ring plate, and is removed after compaction. Note here that straightening of quenched tube is performed by gaging the tube OD to the rate of deformation of 0.5-2.5.

EFFECT: high strength and precision.

1 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: punch for broaching is made as a body of rotation with two holes. The outer diameter of the punch is alternating. The said diameter at the punch length section from its front end face being equal to the inner diameter of the produced hollow billet is equal to the said inner diameter of the hollow billet. Along the remaining length section, the punch diameter is constant and is by 2 mm less than the inner diameter of the hollow billet. One of the holes is through, has the diameter alternating by the length and the axis matching the punch axis. The diameter of the said hole at the length section from the punch front end face equal to its maximal outer diameter is equal to 2/3 of the said punch diameter. Along the remaining length section, the hole diameter is constant and is by 2 mm greater than the hole diameter at its length from the punch front end face. The second hole is fitted by an axis crossing the punch axis at the right angle. The axis of the second hole is set at the distance from the punch front end face equal to 4/5 of the punch length. The diameter of the second hole is constant along the whole hole length and is equal to 5 mm.

EFFECT: improved quality of broached billets due to the reduction of their wall thickness variation and elimination of faults, reduction of friction at the outer and inner surface of the punch.

6 dwg, 1 ex

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SUBSTANCE: according to the method the blank of hanger is made taking direction of rolled stock into account. Then blank is subject to thermal processing, both sides of blank are cleared from material and hanger is formed by means of double-sided shaped embossing. According to the first variant of the method, blank is subject to heat-cyclical processing prior to double-sided embossing. According to the second variant, double-sided shaped embossing is made in two steps and heat-cyclical processing is performed between those two steps.

EFFECT: prolonged life of hanger; increased service life of press tool.

2 dwg, 2 ex

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