Forging mechanism chetyrehvalkovoj radial crimping of the forging machine and the method of its operation control
(57) Abstract:The invention relates to the field of metal forming and can be used in radial-tube forging machines. In chetyrehvalkovoj car in forging mechanism introduces a device that allows you to change modes forging posted on eccentric shafts driven pair of strikers. The method of controlling the operation of the forging mechanism is the displacement of the eccentric shafts of one pair of the heads relative to the other pair of Cam shafts 180o. Changing modes forging is carried out in the forging process without readjusting the radial crimping machine. The invention allows to expand the technological capabilities and improve performance radial crimping machine. 2 S. and 4 C.p. f-crystals, 4 Il. The invention relates to the field of metal forming and can be used in radial crimp machines (RUM).The traditional method of operation of a forging mechanism is in the device and adjustment of him when jaunty produce blows on the workpiece synchronously (4x1) i.e. all four striker simultaneously come to the point of impact. (see "Technology of rotary forging and rolling" H.A. Shestakov, A. A. Shevchenko, Moscow Higher trehvalkovyh RUM (to implement ways of forging waste-free technology of forging thick-walled pipes (for example, patent of Russia No. 2000161, 2010655), where the work of Boykov should be alternately aligned (synchronous) mode 4x1 - simultaneous blow, then in pairs - in 2x2 mode, i.e., two diametrically spaced striker hit the forging, the other two from forgings removed.I.e. you need to change a pairwise manner strikes in the forging process is to change the technology (mode) forging.This level of design RUM allows you to provide this technology is one of the methods described below:
adjustment of the forging mechanism RUM in the Assembly
- dual forging mechanisms one RUM, with strikers one mechanism working raccoglitore relatively Boykov other forging mechanism, i.e.< / BR>where x is the sign of simultaneity (patent Austria N 276009, B 21 J 7/14, 1969)
Each method has significant drawbacks:
to change the mode of forging, in the first case, you need to stop and changeover forging mechanism disassembly and subsequent Assembly.
the second method is characterized by the work of Boykov in spaced vertical planes, which does not provide waste-free technology for the implementation of the patents 2000161, 2010655.As a prototype adopted forging is of chetyrehvalkovoj RUM is to enable the forging mechanism, i.e. two commands: "start", "Stop".In this case, as a rule, the work of Boykov occurs synchronously mode only 4x1 - 4 striker simultaneously hit the forging. Or, if the relevant Assembly work forging mechanism only raccoglitore, i.e. two brisk one line simultaneously hit the forging, two from forgings removed (2x2).Change the mode of operation of the forging mechanism associated with the stop, disassembly, reconfiguration, followed by Assembly and debugging.The proposed device and method of control in the process of forging mechanism to change modes, forging, turning from 4x1 mode 2x2 and back with a short stop drive, but without the need to readjust and then settings.The basis of operation control of the forging mechanism has the ability to perform reverse drive (Fig. 4), and hence, change the mode of operation, which is carried out according to the following scheme management: enable CNR mode 1 - 4x1 ---> "Stop"---> enable (CNL) mode N 2x2; or what is the same: the rotation of the actuator in one direction clockwise ---> "Stop" ---> the rotation of the actuator in the other direction, counterclockwise in Fig. 1, 4.When the operating mode is changed initially affect the drive, which shall stop the forging mechanism, and then the reverse.Next, the work included a control device placed at the ends of the eccentric shafts with diameters location Boykov, as shown in Fig.1 - two designated A-A.Thus, in comparison with the traditional structure of the forging mechanism chetyrehvalkovoj RUM, in the present invention, is added to the control unit by a pair of strikers.The control device is a sectional construction of conjugate pairs of elements whose functions are similar to the functions of the elements of the overrunning clutch double-acting. (Reference couplings edited Poles Century C. the publishing house "engineering" edition II, Leningrad, 1979, S. 215.The proposed construction of the control device can be considered as a transducer angle of conjugate pairs of control elements in the displacement angle of the Cam shaft operated the rich, each associated pair of the control device of "Star" and "the Cage" provides fragmented action, and it provides a free path within a predetermined angle (60o) for a fixed position of the eccentric shaft and only the turn of the last section of the device leads to the implementation of the method.Thus, the operating mode is changed by changing the position of the eccentric shaft driven pair of strikers in relation to the position of the eccentric shaft unmanaged pair.Initially, the control is performed by the reverse drive, and then the control device placed at the ends of the two Cam shafts located diametrically father.The device consists of a reversible electric drive (Fig. 1, 4) wheels 1, "gears-clips" 2 (Fig. 2, 3), sitting freely on the bushing 5, the rollers 3, "star-holder" 4 and 41(the two elements in the device, "stars" 6 bearing 7, the eccentric shaft 8, beskonechnogo fixed connection 9, elements of the actuator (rocker stone, link, Boyko) 10. In Fig. 1 dedicated head of Fig. 3 is shown symbolically eccentric.Conjugate pairs of the control device 4-2, 4-41, 41
FIELD: plastic working of metals, possibly forging ingots and billets in hydraulic forging presses.
SUBSTANCE: apparatus includes two holders of upper and lower strikers having inclined surfaces. Said holders are kinematically coupled with two holders of lateral strikers having inclined surfaces corresponding to those of holders of upper and lower strikers. Four strikers are secured to respective holders by means of clamps and tightening studs. Each of upper and lower strikers has two working portions mutually divided by cutout. Each of lateral strikers has one working portion entering cutouts of upper and lower strikers. At least one adjusting plate is placed between holder of lower striker and lower striker. Lower striker is secured to its holder by means of two Г-shaped clamps. Inclined surfaces of said clamps are forced to inclined surfaces of holder of lower striker; riffled surfaces of said clamps are forced to two friction plates arranged on lateral surfaces of lower striker. Pins passing through openings of adjustment plates and entering openings of holder of lower striker are mounted in lower striker.
EFFECT: lowered cost of making tool, reduced time period for readjustment of it.
2 cl, 5 dwg
FIELD: plastic working of metals, namely constructions of radial swaging machines.
SUBSTANCE: in housing of machine four-striker swaging unit is mounted in the form of four kinematically joined one to other holders of strikers with inclined surfaces. Two holders have П-shaped contour, they embrace two other holders of strikers, arranged horizontally and joined with two sliders. The last are mounted with possibility of simultaneous reciprocation motion with the aid of common drive. Said drive is in the form of two crank mechanisms mounted horizontally and symmetrically relative to swaging unit. Strikers are secured to Said holders. Machine also includes devices for controlling position of strikers and for protecting drive members against overloads. Said devices are in the form of movable supports joined with crank mechanisms, screw pair, hydraulic cylinders and gear transmissions with electric drive.
EFFECT: enlarged manufacturing possibilities, enhanced operational reliability and efficiency of machine, simplified design of its drive unit.
FIELD: plastic working of metals, possibly radial forging of ingots and blanks.
SUBSTANCE: method comprises steps of forging heated blank in one set of strikers mounted in simultaneously moving holders at deformation degree 30 - 90%. Forging process includes individual procedures of squeezing blank, feeding and tilting it. Individual squeezing procedures are realized by depth whose value is determined according to given relation. Method is performed in apparatus having strikers with working surface formed by several planes; holders of upper and lower strikers with inclined sliding faces relative to which inclined sliding faces of holders of lateral strikers are moved. Lateral strikers are coupled with holders of upper and lower strikers through eight guides with П-shaped cross section. Strikers have cross sections with working portions in the form of isosceles trapezium. Forming lock joint inner faces of П-shaped guides and embraced by them faces of holders of strikers are inclined by angle 0 - 170° relative to mounting plane of guide to striker holder.
EFFECT: improved efficiency and quality of forging, improved wear resistance of tools.
6 cl, 10 dwg, 1 ex, 3 tbl
FIELD: plastic working of metals, namely production of calibrated forgings with elongated axis from ingots and preliminarily deformed billets in presses of four-striker forging apparatuses.
SUBSTANCE: apparatus includes holders of upper, lower and lateral strikers. Method comprises steps of heating billet and performing rough and calibration forging by passes at feeding billet after each squeezing and tilting between passes; after rough forging of blank with cross section area F = (1.05 - 1.4)Fn where Fn - surface area of cross section of calibrated forging, placing rigid support or supports between holders of upper and lower strikers. Calibration forging operation is realized until closing holder of upper striker with rigid support or supports during one or several passes.
EFFECT: possibility for producing calibrated forged products of different cross section and different size in one set of strikers, enhanced efficiency of method due to absence of period for readjusting tool.
2 cl, 1 dwg, 1 ex, 1 tbl
FIELD: plastic working of metals, possibly forging ingots and billets of different steels and alloys in hydraulic forging presses.
SUBSTANCE: apparatus includes two holders of upper and lower strikers with inclined surfaces and two holders of lateral strikers kinematically coupled with first two holders. Holders of lateral strikers have inclined surfaces corresponding to inclined surfaces of holders of upper and lower strikers. Holders of lateral strikers are mounted on lateral surfaces of holders of upper and lower strikers with use of eight П-shaped cross section guides. Strikers are mounted in holders. Two guides of holders of upper and lower strikers are secured to holder of lower striker symmetrically at both sides. Said guides have П-shaped cross section, they embrace apparatus at lateral and front sides and have movable contact with guides of holders of lateral strikers. Guides of holders of upper and lower strikers have windows in lateral sides in front of holders of lateral strikers for passing holders at opening apparatus.
EFFECT: improved design of apparatus.
2 cl, 8 dwg
SUBSTANCE: facility contains holders of top and bottom heads and two holders of side heads. To holders there are affixed corresponding heads. Heads, fixed to holders, located in one of two mutually perpendicular planes, allows two operating sections. These sections are located from the each side of facility plane of symmetry. Heads, fixed to holders, located in the different plane, allows one operating section each. Current operating section can be located between mentioned two operating sections. In facility there is at least one system for movement at least one head relative to its holder. System contains hydraulic actuator with rod or plunger and control system, hydraulic actuator and facility position measuring of head relative to its holder. Head is connected to rod or plunger of hydraulic actuator with ability of fixed movement relative to corresponding holder in vertical or horizontal symmetry plane of facility. Hydraulic actuators are located in bodies of corresponding holders of heads. In pipelines of operating fluid supply to hydraulic actuators there are built in back pressure valves.
EFFECT: laboriousness reduction of facility repurposing for different dimension type.
10 cl, 12 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used in production of downhole rod pump cylinders. Pipe semis are produced by hot forging at fixed forging mandrel with conical working surface. Locating shank is used for fixing forging mandrel in channel of as-forged part. After channel boring cold radial forging with channel surface broaching is carried out with the help of extra mandrel. Hot and cold forging are performed by hammers at radial forging machine. After every reduction in said hot and cold processes hollow billet and half-blank are fed and edged. Liquid process lubricant is fed in billet deformation area, forged part centering area and broaching area. Feed is performed via radial channels in forging mandrel and centering shank. Start of edging is set to hollow billet and pipe half-blank angle not earlier that the feed start.
EFFECT: accurate sizes, higher surface quality, reliable operation of the machine.
10 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: technological line of radial forging contains a forging block, a heating device placed on both sides of it along the forging line live rollers and an additional heating device. The latter is in the form of a pusher furnace located along the forging line on the opposite side of the forging block relative to the heating device. There is an additional roller between the live rollers. An additional roller has the ability to connect the live rollers to ensure the movement of workpieces from one roller to another and disconnection. Thrusts are provided which can be mounted on the live rollers line in a position which stops the workpiece in front of the forging unit and in a position which transmits the workpiece from one live roller to another via an additional roller.
EFFECT: expansion of technological possibilities and increase of productivity of a technological line of radial forging.
3 cl, 4 dwg, 1 ex