DE202014009142U1 - Device for descaling forgings consisting of iron or steel alloys or non-ferrous materials - Google Patents

Abstract

Device for descaling iron or steel alloy or non-ferrous material forged parts (57) weighing 0.1 kg to 4 kg, in particular 0.1 to 19 kg, preferably 0.1 to 50 kg, the inductively heated to forging heat and forged and then on different sides at a speed of 0.2 to 2 m / s to the only during this period in the millisecond range, z. B. between 20 and 50 milliseconds, spraying spray jets can be passed, which can be sprayed onto the surfaces to be descaled at an angle (δ) deviating from 90 degrees, the spray jets each passing through a nozzle valve (1) for supplying pressurized liquid, with an internally sleeve-shaped housing (2), which has an opening (51) at one end for connection to a pressure fluid line and at its opposite, coaxial end an exchangeable nozzle body or a connection or a supply line to such, with an arranged in the housing Valve body (10) which is arranged axially and radially locked in a central bore (3), the valve body (10) having a one-piece longitudinal section (13) facing a valve seat, which has a chamber or bore (26) penetrating it centrally, in which a prestressed compression spring element (27) is arranged, en shut-off body (28) is loaded in the direction of a valve seat body (29) which is also arranged coaxially to the shut-off body (28) and which is arranged in the sleeve-shaped housing (2), and that the compression spring element (27) receiving the pressure spring element (27) is designed as a bore (26) Chamber of the valve body (10) is connected via at least one control channel (22, 23, 24) to a connection opening of the housing, which for the controlled or regulated supply and discharge of pressure fluid into which the compression spring element (27) and the shut-off body (28) receive Chamber (26) is used, with at least one bypass channel (41, 42, 43, 44) being connected to the end connection opening (51) for supplying the pressure fluid, which bypass channel (41, 42, 43, 44) penetrates the valve body (10) and into an annular channel designed as an annular space (48) opens out, which is formed on the one hand by the inside of the housing (2) and on the other hand by the outer circumferential surface of the valve body (10), this annular channel (48) also at a Ra around (49) is connected in a pressure medium conducting manner, which is formed between the end face of the valve body (10) facing the shut-off body (28) and the end face of the valve seat body (29), on the other hand, the valve nozzles (1, 63) in segments, spray bars or as individual nozzles are arranged, which can be controlled individually or in groups in the millisecond range intermittently in the open position or in the shut-off position, with a detection device (64) that works either with light barriers or with photocells or with a gamma head or other sensors that enable the passing of the forged part to be descaled (57 ) and then forwards a signal to the device responsible for this, which then controls the nozzle valves, which then spray their spray medium jets (65 and / or 66), offset in time, onto the forged part to be descaled and descaling it, with the nozzle valves (1 , 63) by an adjusting device (70) together with regard to their S. spray angle are adjustable and in particular the adjustment device in a suitable electronic or electrical control, for example in a PLC control, ...

Description

genus

The invention relates to a device for descaling forgings consisting of iron or steel alloys or non-ferrous materials.

State of the art

Small to medium forgings in a weight range of about 0.1 to 4 kg, in particular from 0.1 to 19 kg, preferably from 0.1 to 50 kg are usually heated inductively, which due to the shorter heating time a correspondingly low scale formation compared to gas- or oil-heated heating devices entails (magnitude of about 0.5 percent by weight compared to 2.5 to 4% in gas or oil heating). This type of heating is mainly used for smaller material cross sections in the size range of about 25 to 100 mm. Due to the low mass and thus comparatively low heat content, these parts cool relatively quickly and are therefore usually rarely descaled.

The temperature of the blocks before descaling is about 1,000 to 1,250 ° C. Usually these blocks cool not only by the influence of the actual descaling, but especially during the delivery time and also by the influence of stray water. This can lead to the fact that the subsequent forming operations can no longer be carried out, especially for small and very small parts.

In the prior art, nozzle assemblies with constant water flow under high pressure or with switching valves in conjunction with low-pressure pre-flooding of the spray bar to avoid pressure shocks during descaling worked. This also causes a constant flow of water from the nozzles. Possible solutions here are nozzle check valves, which should close against spring pressure up to about 7 to 8 bar and prevent the flow of water through the pre-flooding. In practice, however, these are leaking over time due to deposits and contamination of the media used - circulating water or fresh water - and leakage of water can not be ruled out.

From the DE 28 15 838 A1 a system for removing the scale of steel pieces is known, which are heated forging in a press or with a die hammers, by means of high pressure water jets, the plant is associated with a single press or a single die hammers, all working phases, namely Spraying each piece with high pressure water, removing the scales from its surface and returning the equipment to its initial state, starting anew each time and running completely automatically when detecting a piece of a sensing element, for example a photoelectric cell which is disposed on the path of movement, which is traversed by the piece on the way from the heating furnace to the press and the die hammer. The jets of water are delivered by two or more jets which are components of a hydraulic system controllable by an oleodynamic system which, in turn, operates each time the sensing element, for example the photoelectric cell, moves on the way to the press the piece located on the sledgehammer. The system is further characterized in that the scanning element formed, for example, as a photoelectric cell after the detection of a piece located on the way to the press or the die causes the excitation of a relay which controls a solenoid valve equipped with two electromagnets, such that a End portion of an oil-dynamic cylinder is associated with a pressure fluid container and the fluid pressure drives the piston of the oleodynamic cylinder, wherein the piston of a hydraulic cylinder which is connected to the piston of the oleodynamic cylinder, a quantity of water through the hydraulic system drives, whereby the nozzles their water jets on the piece, the relay being energized by the scanning element, preferably in the form of a photoelectric cell, via a suitably dimensioned time delay element whose delay time corresponds to the time required for the piece, and the like m to get from the scanning to the nozzles. The period of time during which the nozzles deliver water jets to the piece is controllable by means of a timing member which causes the return of the electrovalve to its initial position when the piece is hosed down its entire length. The system is designed such that the hydraulic system and oleodynamic system after the completion of the discharge of water through the nozzles return to their initial state, wherein a further injection phase begins by the nozzles, after another piece was determined by the preferably as a photoelectric cell. The nozzles, through which the jets of water are discharged onto the pieces, are mounted along a tube in the form of a ring and directed radially against the interior of the ring passing through the piece, the ring and the nozzles being arranged in a chamber separated from one Conveyor belt is carried, which carries the pieces of the heating oven to the press or the die hammer, wherein the conveyor belt is driven in dependence on the properties of the pieces to be forged with variable speed. In the of the hydraulic cylinder to the nozzle provided with the ring extending hydraulic circuit, a check valve is arranged, which prevents suction of the water contained in the ring in the hydraulic cylinder when the corresponding piston moves back in the cylinder. Between the hydraulic cylinder and the outer hydraulic supply network from which the piston sucks water after each spray phase of the nozzles, at least one check valve is installed, which prevents transmission of the generated during the ejection phase of the nozzle hydraulic pressure in the supply network, further comprising a filter is, by which the water entering the hydraulic cylinder is filtered and the penetration of foreign matter is prevented. In addition, the plant is characterized in that the piston of the oleodynamic cylinder, which controls the piston of the hydraulic cylinder, is driven by the pressure fluid in a liquid container, which is connected to the oleodynamic cylinder via a line piece and a reversing valve, via which the hydraulic fluid alternatively to compress the water contained in the hydraulic cylinder upstream of the piston of the oleodynamic cylinder or to return that piston and the piston of the hydraulic cylinder to its initial position downstream of the piston of the oleodynamic cylinder, during which the piston returns from the external hydraulic supply network the amount of water is sucked into the hydraulic cylinder, which is required during the subsequent injection phase of the nozzle. In addition, a timer member is provided, by means of which the solenoid valve during a period in which the compression of the piston is maintained in the position causing the oleodynamic cylinder, which is necessary and sufficient for spraying the piece over its entire length. After the return of the solenoid valve to its initial position, the connection between the liquid container and the downstream of the piston part of the oleodynamic cylinder is opened again after completion of the compression phase of the piston in the oleodynamic cylinder, wherein the liquid contained in the other part of the oleodynamic cylinder from the Cylinder ejected and passed into a collecting container, from which it is returned to the circuit, while in the hydraulic cylinder, the water suction takes place. Between the liquid container and the solenoid valve, a control valve is arranged, by means of which the amount of the pressure fluid fed into the oil-dynamic cylinder is variable. This system should work independently, each associated with a single press and therefore includes only very small amounts of water and hydraulic fluid quantities and their pressurized equipment parts have very small dimensions and weights, so that in case of bursting the risk to persons and property extremely low should. The jet of water discharged from the nozzles is metered in its quantity and in its duration, depending on the dimensions of the piece, in such a way that the water jet is interrupted when the piece leaves the area of action of the nozzles.

The DD 1 22 038 B3 relates to a device for the automatic induction heating of rod ends in the transverse transport method using Spaltinduktoren without additional transport and feeders for the inductor coating.

The Publication Doris Schulz: Blasting of individual parts and bulk material: More efficiency in descaling. JOT - Journal of Surface Technology, Wiesbaden: Springer, 6. 2010, 72-74, - ISBN P-ISSN 0940-8789 , generally describes the descaling of forgings.

The DE 200 00 822 U1 relates to a device for hydromechanical descaling with a plurality of liquid jet nozzles, on which the workpiece to be descaled is moved, with at least one liquid pump, the liquid jet nozzles are distributed to a plurality of spaced apart in the direction of movement of the workpiece bodies or the liquid jet nozzles are arranged in one place, and the workpiece is moved past the liquid jet nozzles several times, each time only a part of the liquid jet nozzles is active. The liquid jet nozzles may be arranged on bars or rings, wherein the bars are arranged pivotable about their longitudinal axis.

The DE 10 2007 011 016 B3 describes a nozzle valve, for use in the industrial sector for supplying pressurized fluid, with an inner sleeve-shaped housing having at one end an opening for connection to a pressure fluid line and at its opposite, coaxial end a replaceable nozzle body or a connection or a supply line to such, having a valve body disposed in the housing, which is arranged axially and radially locked in a central bore, wherein the valve body has a valve seat facing one-piece longitudinal portion having a centrally penetrating him chamber or bore, in which a Preload standing pressure spring element is arranged, which loads a shut-off body in the direction of a likewise arranged coaxially to the shut-off valve seat body, which is arranged in the sleeve-shaped housing, and that the pressure spring element aufneh ending as a bore formed chamber of the valve body is connected via at least one control channel to a connection opening of the housing, which is used for controlled or regulated supply and discharge of pressure fluid in the pressure spring element and the shut-off receiving chamber, wherein at the end-side port opening for supplying the pressure fluid at least one bypass channel is connected, which penetrates the valve body and opens into an annular channel, which is formed on the one hand by the inside of the housing and the other by the outer surface of the valve body, said annular channel is connected to a space druckmittelleitend, between the shut-off facing the front side of the valve body and the end face of the valve seat body is formed on the other hand.

task

The invention has for its object to provide a Entzunderungsvorrichtung for descaling of iron or steel alloys or non-ferrous materials existing forgings, which allows descaling at low temperature losses and low energy consumption.

solution

This object is solved by the features of claim 1.

Some advantages

In the present invention, inline shut-off and shut-off nozzle valves are used which switch in the millisecond range and inject spraying means only during the passage of a forging, and which after descaling reliably and completely prevent the spray flow from the nozzle. Thus, the spray flow, for example, when using water, the water flow, limited only to the actual descaling process. This results in an extremely low Sprühmittelbedarf, for example, water needs, for the actual Entzunderungsprozess, along with low energy consumption and lower treatment costs for the spray medium used, the low cooling of the parts by a vagrant spray, for example, water, and beyond a dry environment for the upstream and downstream facilities, such as transport facilities. Water, but also a suitable other spraying and descaling medium, for example gases or dry ice, may preferably be used as spraying agent. The short switching times allow the descaling of such small forgings, since they only suffer a slight temperature loss, with low energy consumption.

For this purpose, nozzles are used, as they are derived from the applicant DE 10 2007 011 016 B3 are each known and used in each case a nozzle valve with an inner sleeve-shaped housing having at its front side an opening for connection to a hydraulic fluid line and at its opposite, coaxial end a replaceable nozzle body or a connection or a supply line to such, with a in the housing arranged valve body which is arranged axially and radially locked in a central bore, wherein the valve body has a valve seat facing one-piece longitudinal portion having a centrally penetrating him chamber or bore in which a biased compression spring element is arranged, which is a shut-off in Direction to a likewise coaxial with the shut-off valve arranged valve seat body, which is arranged in the sleeve-shaped housing, and that the pressure spring element receiving as a bore formed chamber of the valve body via mi At least one control channel is connected to a connection opening of the housing, which serves for the controlled or regulated supply and discharge of pressure fluid in the compression spring element and the shut-off receiving chamber, wherein at the end-side port opening for supplying the hydraulic fluid at least one bypass channel is connected to the Passing through the valve body and opens into an annular channel, which is formed on the one hand by the inside of the housing and the other by the outer surface of the valve body, said annular channel is connected druckmittelleitend to a space between the shut-off facing the end of the valve body and the end face of the valve seat body on the other hand is formed. These nozzles can be operated in inline arrangements. It is possible to attach the relevant valve in the longitudinal axis direction to a connection means, for example on a spray bar. As a result, a favorable maintenance access at a lower height is possible. This is an advantage that comes to the fore especially with selective descaling. The nozzle valves of this type are individually controllable, compared to firmly connected systems such as spray rings, spray bars or individual casings of spray nozzles. This results in an overall energy savings, as not needed nozzles do not splash and minimizing signs of wear by stray water is given. It is also possible to save main spray valves by shifting to the beam. Finally, individual nozzle valves can be grouped together so that group controls are possible (Function sectioned bar). Pre-flooding is not required because beams or piping systems remain filled with water. In addition, different drive or control times are possible. Switching tips can be cushioned by successively switching on / off, despite very fast switching times for the individual nozzle valves.

The nozzle valves can be adjusted by an adjusting device together with respect to their spray angle and the adjustment can be included in a case of need in a suitable electronic or electrical control, for example in a PLC control, which control not only the nozzle valves in the millisecond range, but possibly also adjusts and locks all the nozzle valves in a suitable manner with respect to their spraying agent jets and, if necessary, together with or in succession subject to spraying agent and regulates and regulates, depending on the temperature and / or volume and / or dimensions of the forgings to be descaled.

In all cases results in an extremely low Sprühmittel-, especially water consumption, which is environmentally friendly and energy-saving. In this way, even small components, such as those used for the electronics industry, desaturate.

Further inventive embodiments

Further inventive embodiments are described in claims 2 to 7.

In the embodiment according to claim 2, the valve nozzles are arranged in different planes whose spraying agent jets the respective surfaces to be descaled under a z. B. brush sharp angles of incidence.

In the embodiment according to claim 3, the valve nozzles are arranged in a star or circular or rectangular manner in the descaling station and the conveyor track. The spraying agent jets encase the forging part to be descaled as it passes through with their spray jets, so to speak, the forging from all sides and descaling it extremely short term on all its surfaces. This results in a uniform distribution of the jet pressure (Impact) and the specific application (water application in g / cm ² ).

In a further embodiment, the descaling device has a height adjustment device with which the inclination of the conveyor track can be adjusted and locked in the respective desired angular position in order to change the angle depending on the mass of the forgings to be descaled if required. As a result, the gravitational force can also be used for conveying, depending on the mass of the forgings to be descaled - claim 4.

According to claim 5, the conveyor track on a nozzle gap through which the Sprühmittelstrahl passes and impinges on the front at an acute angle to the forging to be descaled.

In the embodiment according to claim 6, a nachspritzendes nozzle valve is provided, the angle is adjustable and can be locked in the respective desired position.

An advantageous embodiment is described in claim 7, which is characterized by a reservoir in which hydraulic oil is arranged, which is conveyed by a motor driven, adjustable in their capacity pump in a line which opens into a cylinder of a printing cylinder, in a differential piston is longitudinally displaceably and sealingly guided, the annular surface is acted upon by the hydraulic oil via the line and thereby moves the cylinder, with a water tank which is connected via a line and a check valve to a cylinder chamber druckmittelleitend, in which the smaller piston of the differential piston is guided longitudinally displaceable and sealing, and that the cylinder space in which the larger cylinder of the differential piston is guided longitudinally displaceable and sealing, is connected via a line to an accumulator, which in the illustrated embodiment as Druckgasbehä Lter is formed, which is connected via a safety valve to a return line, with a shut-off device, wherein the differential piston serves as a pressure booster, wherein the line ( 80 ) is connected via the check valve and the line to the high pressure side of the pressure booster, wherein the pressurized medium - water - the nozzle valves applied to three / two-way valves, which serve for pilot control, with a filter and a pressure relief valve and a multi-way valve.

In the drawing the invention - partly schematically - exemplified. Show it:

1 to 5 refer to a nozzle valve according to the prior art after the date of the applicant DE 10 2007 011 016 B3 , in detail, as follows:

1 an axial section through an inventive nozzle valve;

2 a guided orthogonal to the longitudinal axis of the nozzle valve cross-section along the line II-II of 1 ;

3 a guided orthogonal to the longitudinal axis of the nozzle valve cross-section along the line III-III of 1 ;

4 an end view in the direction of arrow A of the 1 ;

5 an inline built-in nozzle valve in section;

6 a device according to the invention in a schematic side view;

7 a similar device as in 6 shown, partly in section, partly in side view;

8th the arrangement of nozzle valves in the region of a nozzle gap provided in the conveying device;

9 another embodiment of the invention;

10 the arrangement of nozzle valves as nachspritzende nozzles and

11 a circuit diagram for a device according to the invention.

The reference number 1 refers to a total of a nozzle valve, as it can be used, for example, in the industrial sector, for example in devices for descaling.

The nozzle valve has a housing 2 on, that's a bore 3 owns that from the lengths sections 5 . 6 . 7 . 8th and 9 consists of different diameters and are arranged coaxially with each other. The length section has an external thread 4 ,

With 10 Overall, a valve body is referred to, in this case from the piston-shaped thickening 11 , an adjoining, approximately cylindrical longitudinal section 12 and an enlarged diameter cylindrical length portion 13 exists, which are all materially connected together in one piece and how the housing 2 consist of a steel alloy. The valve body 10 is against an annular shoulder 14 of the length section 6 the bore 3 axially locked in one direction. On the opposite side acts against the piston-shaped thickening 11 of the valve body 10 a nut 15 in internal thread 16 of diameter compared to the piston-shaped thickening 11 enlarged length section 5 the bore 3 is screwed in and with her front side 17 against the facing this side of the piston-shaped thickening 11 rests and this fixed axially.

The on their outer surface 18 cylindrical outer surface of the piston-shaped thickening 11 of the valve body 10 is slidable on the cylindrical inner wall of the longitudinal section 6 at.

In the area of the piston-shaped thickening 11 is the case 2 on one side with a connecting piece 19 with internal thread 20 and connection port provided with a non-illustrated pressure fluid line for supplying control fluid for controlled or controlled feeding to a ring collection channel 21 to connect. To the ring collection channel 21 of the housing 2 are about the circumference of the piston-shaped thickening 11 a plurality of, for example, three control channels extending at equal angular distances from each other 22 . 23 and 24 connected in a centric bore 25 the piston-shaped thickening 11 discharge fluid-conducting. This hole 25 is on a coaxial, enlarged diameter bore 26 connected fluid-conducting, in their deepest a compression spring element 27 , in this case a helical compression spring, supported under prestress, which is a spherical shut-off body 28 against a valve seat body 29 burdened in Absperrsinne. The shut-off body 28 is in one in the cylindrical length portion 13 arranged guide sleeve 30 stored, the one to the hole 26 cylindrical, coaxial bore 31 has, so that the over the connecting piece 19 brought control fluid the shut-off 28 can apply. The guide sleeve 30 is in a cylindrical bore 32 also coaxial with the bore 26 runs, arranged and against an annular shoulder 33 axially locked.

On both sides of the ring collection channel 21 is ever present a present as an O-ring sealing element 34 respectively. 35 in a corresponding groove of the piston-shaped thickening 11 arranged, each sealingly against the inner wall of the Längenabschittes 6 is applied.

Also the valve seat body 29 has a arranged in an annular groove, also present designed as an O-ring sealing element 36 on, on the cylindrical inner wall of the longitudinal section 8th liquid-tight.

The reference number 37 denotes a union nut, which on the with the external thread 4 provided length section 38 of the housing 2 is screwed on and a nozzle body 39 with spray opening 40 releasably locked.

In the embodiment shown in the drawing, the valve body 10 four bypass channels 41 . 42 . 43 and 44 associated with the longitudinal axes at an acute angle α to longitudinal axis 45 of the nozzle valve 1 run. Of these longitudinal axes are in 1 only two longitudinal axes 46 and 47 each extending at the acute angle α, shown. As you can see, the bypass channels penetrate 41 . 42 . 43 and 44 with their center lines straight, the piston-shaped thickening 11 and also a part of the materially adjoining part of the valve body 10 , for example, the cylindrical length section 12 and open into an annulus 48 out, from the inner wall of the length section 7 on the one hand and the outer jacket surface of the valve body provided here 10 on the other hand is formed. This annulus 48 is also to a room 49 connected, on the one hand by the valve seat body 29 and on the other hand from the common end face 50 of the length section 13 and the guide sleeve 30 is formed essentially.

With the length section 5 or the opening provided here 51 is connected to a suitable, for example, under high pressure pressure fluid source (not shown). In this way, the pressure fluid from the opening 51 over the bypass channels 41 . 42 . 43 and 44 in the annulus 48 as well as in the room 49 to arrive and also acts against the restoring force of the compression spring element 27 pressure-effective surface of the shut-off body 28 , which in addition by the control pressure, over the connecting piece 19 and the control channels 22 . 23 and 24 as well as the holes 25 . 26 and 31 is introduced. If the control pressure is turned off, the much higher pressure in the rooms 48 . 49 is pending, the shut-off 28 against the restoring force of the compression spring element 27 in open position, so that the pressure fluid to the nozzle body 39 flow and out of the spray opening 40 is able to emerge. If the control fluid again via the connecting piece 19 fed, the shut-off comes 28 back in his in 1 Shut-off position shown, so that no more hydraulic fluid from the nozzle body 39 emerges.

at 52 is provided with an internally threaded measuring opening for connecting a measuring device. This connection opening 52 but can also be omitted in case of need.

Furthermore, it is possible to use the connecting piece 19 not laterally, but to arrange axially and the housing 2 To make cylindrical on its outside, so that the entire nozzle valve receives a cartridge-like, cylindrical shape, which is designed to be compact.

How to get out 5 recognizes, can by this particular embodiment of the nozzle valve according to the invention 1 an in-line arrangement done. In 5 is with the reference numeral 53 a spray bar of a descaling device, not shown, with the connecting piece 54 the nozzle valve 1 coaxial, thus inline, is attached.

at 55 a workpiece to be descaled is shown.

Instead of welding, as shown, the nozzle valve 1 also by screw, by bayonet connection or the like with the connection piece 54 be connected fluid-tight. The direction of flow thus takes place from the spray bar 53 in the axial direction through the nozzle valve 1 ,

With the reference number 56 is a trained in the illustrated embodiment as a chain conveyor conveyor means, which may also be a sliding link or the like. The chain conveyor 56 or the like is driven by a motor and promotes the forgings to be descaled 57 to a conveyor track 58 , which belongs to a likewise motor-driven conveyor. The conveyor track 58 can also promote the parts magnetically. The conveyor track 58 is inclined at an acute angle γ of, for example, 15 degrees to the horizontal, so that in case of need to be descaled even hot forgings 57 be transported under their own weight in the direction of Z. The conveyor track 58 may be associated with rolling bearings mounted rollers (not shown), so that the forgings 57 Move towards Z at a relatively high speed of 0.5 to 2 meters / second. If necessary, but also the conveyor track 58 be driven by a motor.

at 59 suitable height adjustment devices can be provided with which the inclination of the conveyor track 58 change in case of need and can also be locked in the desired angular position. In this way, the angle γ can be adjusted according to the mass of forgings to be descaled 57 change if necessary.

As you can see, owns the conveyor track 58 a nozzle gap 60 through which the spray jet 61 pass through and on the front 62 can hit at an acute angle. The nozzle valve 1 can this be adjustable in its angular position and in the particular desired angular position also be locked.

With the reference number 63 is an injector nozzle valve designated whose angle δ in the illustrated embodiment is 45 degrees, but as well as the nozzle valve 1 adjustable and also lockable in the respective desired position. The injector nozzle valve 63 can be like the nozzle valve 1 be designed constructively.

With the reference number 64 is a recognition device called, which works either with photocells, photocells or with a gamma head or other sensors and the passing of the forged Schmiedeteils 57 detected and then passes a signal to the competent device, which then controls the nozzle valves, which then their spraying agent jets 65 and or 66 , also offset in time, spray on the black part to be descaled and desalt it. The scale falls below the conveyor track where suitable collection containers or the like, not shown, are arranged, for example scraper conveyors which convey the scale and, if necessary, when using a liquid as a spray, the spray liquid to a treatment or separation station (not shown).

Out 7 a device of the embodiment according to the invention is shown in somewhat greater detail. The conveyor track 58 has guide rails for this purpose 67 . 68 and 69 on.

The nozzle valves 1 are by an adjusting device 70 together adjustable in terms of spray angle. The adjusting device 70 can be included in a suitable electronic or electrical control, for example in a PLC control, which not only control the nozzle valves in the millisecond range, but optionally also adjusts and locks all the nozzle valves in a suitable manner with respect to their Sprühmittelstrahlen and optionally together or sequentially depending on Temperature and / or volume and / or dimensions of the forgings to be descaled with spray applied and switched on and off.

In the case of the 8th and 9 apparent embodiments, the nozzle valves are approximately star-shaped to be descaled forging 57 arranged in approximately constant radius, so that the spray jets ( 9 cover).

In 10 are the nachspritzenden nozzle valves shown, which are arranged in different planes and their Sprühstahlen on the rear in the direction of transport Z surface 71 of forgettable forging 57 judge. This will make the back side surface 71 descaled from above and / or below and / or laterally with spray jets.

The end 11 apparent circuit diagram shows a reservoir 72 in which a suitable hydraulic oil is arranged by a motor 73 driven, optionally adjustable in their capacity pump in a line 74 which is conveyed in a cylinder 76 a printing cylinder 77 terminates, in which a differential piston 78 is guided longitudinally displaceable and sealing, the annular surface by the hydraulic oil via the line 75 is applied and thereby moves the cylinder in the direction T.

at 79 a water tank is provided, which is connected by a pipe 80 and a check valve 81 to a cylinder room 82 pressure medium line is connected, in which the smaller piston of the differential piston 78 is guided longitudinally displaceable and sealing.

The cylinder space in which the larger cylinder of the differential piston 78 is longitudinally displaceable and sealing, is via a pipe 83 on a battery 84 connected, which is formed in the illustrated embodiment as a pressurized gas container, via a safety valve 85 on a return line 86 connected.

at 87 a shut-off device is arranged.

The differential piston 78 serves as a pressure intensifier.

The administration 80 is over the check valve 81 and the line 88 connected to the high pressure side of the pressure booster. The pressurized medium, in this case water, acts on the nozzle valves 89 . 90 . 91 . 92 ,

at 97 and 98 Three-way / two-way valves for pilot control are shown.

99 is a filter and 100 a pressure relief valve and 101 a multi-way valve.

The features described in the claims and in the description and apparent from the drawing features may be essential both individually and in any combination for the realization of the invention.

LIST OF REFERENCE NUMBERS

1

nozzle valve

2

casing

3

drilling

4

external thread

5

Length of the bore

6

Length of the bore

8th

Length of the bore

9

Length of the bore

10

valve body

11

Thickening, piston-shaped, end section

12

Length section, cylindrical

13

Length section in diameter enlarged

14

annular shoulder

15

nut

16

inner thread

17

front

18

Outer casing surface

19

spigot

20

inner thread

21

Ring collection channel

22

control channel

23

control channel

24

control channel

25

Bore, centric

26

Bore, centric

27

Compression spring element, helical compression spring

28

shut-off

29

Valve seat body

30

guide sleeve

31

drilling

32

drilling

33

annular shoulder

34

Sealing element, O-ring

35

Sealing element, O-ring

36

Sealing element, O-ring

37

Nut

38

longitudinal section

39

nozzle body

40

spray opening

41

bypass channel

42

bypass channel

43

bypass channel

44

bypass channel

45

longitudinal axis

46

longitudinal axis

47

longitudinal axis

48

annulus

49

room

50

front

51

opening

52

measurement opening

53

spray bars

54

spigot

55

workpiece

56

chain conveyors

57

forging

58

conveyor track

59

height adjustment

60

die gap

61

Sprühmittelstrahl

62

Front of the forge

63

Nozzle valve, re-injection

64

recognizer

65

spray

66

spray

67

guide rail

68

guide rail

69

guide rail

70

adjustment

71

rear surface

72

reservoir

73

engine

74

pump

75

management

76

cylinder

77

pressure cylinder

78

Differential piston of the pressure booster

79

tank

80

management

81

check valve

82

cylinder space

83

management

84

Akkumulat

85

safety valve

86

Return line

87

Shut-off

88

management

89

Multi-way valve

90

Multi-way valve

91

Multi-way valve

92

Multi-way valve

93

94

95

96

97

Third / two-way valve

98

Third / two-way valve

99

filter

100

Pressure relief valve

101

Multi-way valve

A

view direction

T

Lifting direction of the differential piston

V

Lifting direction of the differential piston

Z

conveyor

α

Angle of the respective longitudinal axis of the bypass channels 41 to 44 to the longitudinal axis 35 of the nozzle valve

γ

angle

δ

Spray angle, impact angle

bibliography

• DD 1 22 038 B3
• DE 28 15 838 A1
• DE 200 00 822 U1
• DE 10 2007 011 016 B3
• Doris Schulz: Blasting of individual parts and bulk material: More efficiency in descaling. JOT - Journal of Surface Technology, Wiesbaden: Springer, 6.2010, 72-74, - ISBN P-ISSN 0940-8789

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2815838 A1 [0005]
• DD 122038 B3 [0006]
• DE 20000822 U1 [0008]
• DE 102007011016 B3 [0009, 0013, 0024]

Cited non-patent literature

• Publication Doris Schulz: Blasting of individual parts and bulk material: More efficiency in descaling. JOT - Journal of Surface Technology, Wiesbaden: Springer, 6. 2010, 72-74, - ISBN P-ISSN 0940-8789 [0007]

Claims (7)

Device for descaling forgings consisting of iron or steel alloys or non-ferrous materials ( 57 ) having a weight of from 0.1 kg to 4 kg, in particular from 0.1 to 19 kg, preferably from 0.1 to 50 kg, inductively heated to forging heat and forged and then on different sides at a speed of 0.2 to 2 m / s at the only during this period in the millisecond range, z. B. between 20 and 50 milliseconds, spraying spray jets are pasted, which can be sprayed at a different angle of 90 degrees (δ) on the surfaces to be descaled, the spray jets each by a nozzle valve ( 1 ) for supplying pressurized fluid, with an inner sleeve-shaped housing ( 2 ), which has an opening ( 51 ) for connection to a pressure fluid line and at its opposite, coaxial end has a replaceable nozzle body or a connection or a supply line to such, with a valve body arranged in the housing ( 10 ), which in a centric bore ( 3 ) is arranged axially and radially locked, wherein the valve body ( 10 ) a one-piece longitudinal section facing a valve seat ( 13 ) having a centrally penetrating chamber or bore ( 26 ), in which a prestressed compression spring element ( 27 ) is arranged, which is a shut-off ( 28 ) in the direction of a likewise coaxial with the shut-off ( 28 ) arranged valve seat body ( 29 ) loaded in the sleeve-shaped housing ( 2 ) is arranged, and that the compression spring element ( 27 ) receiving as a bore ( 26 ) formed chamber of the valve body ( 10 ) via at least one control channel ( 22 . 23 . 24 ) is connected to a connection opening of the housing, for the controlled or regulated supply and discharge of hydraulic fluid into the pressure spring element ( 27 ) and the shut-off body ( 28 ) receiving chamber ( 26 ), wherein at the end-side connection opening ( 51 ) for supplying the pressure fluid at least one bypass channel ( 41 . 42 . 43 . 44 ), which connects the valve body ( 10 ) penetrates and into an annular space ( 48 ) formed annular channel, the one hand through the inside of the housing ( 2 ) and on the other hand by the outer circumferential surface of the valve body ( 10 ), this annular channel ( 48 ) also to a room ( 49 ) is connected to the pressure medium line, which between the shut-off ( 28 ) facing the front side of the valve body ( 10 ) and the end face of the valve seat body ( 29 ) is formed on the other hand, wherein the valve nozzles ( 1 . 63 ) are arranged in segments, spray bars or as individual nozzles which are controllable individually or in groups in the millisecond range intermittently in the open position or in the blocking position, with a recognition device ( 64 ), which works either with photocells or with photocells or with a gamma head or other sensors which allow the forging part to be descaled ( 57 ) and then passes a signal to the device responsible for it, which then actuates the nozzle valves, which then spray their spray ( 65 and or 66 ), offset in time, spray onto the forged part to be descaled and desaturate it, preferably the nozzle valves ( 1 . 63 ) by an adjusting device ( 70 ) are adjustable in terms of their spray angle and in particular the adjusting device in a suitable electronic or electrical control, for example in a PLC control, is involved, in particular not only the nozzle valves ( 1 . 63 ) in the millisecond range, but preferably also all nozzle valves ( 1 . 63 ) are adjusted and locked with respect to their spray jets, preferably the nozzle valves ( 1 . 63 ) together or successively according to the temperature and / or volume and / or dimensions of the forgings to be descaled ( 57 ) can be switched on and off inline. Descaling device according to claim 1, characterized in that the valve nozzles ( 1 . 63 ) are arranged in different planes whose spraying agent jets spread over the relevant surfaces to be descaled at, for example, an acute angle of incidence. Descaling device according to claim 1 or 2, characterized in that the valve nozzles ( 1 . 63 ) star or circular or rectangular in the descaling station around the conveyor track ( 58 ) are arranged. Descaling device according to Claim 1 or one of Claims 2 to 3, characterized by a height adjustment device ( 59 ), with which the inclination of the conveyor track ( 58 ) in the respective desired angular position and can be locked to the angle (γ) depending on the mass of forgings to be descaled ( 57 ) if necessary. Descaling device according to claim 1 or one of claims 2 to 4, characterized in that the conveyor track ( 58 ) a nozzle gap ( 60 ), through which the spray jet ( 61 ) and on the front ( 62 ) at an acute angle to the forging part to be descaled ( 57 ). Descaling device according to claim 1 or any one of claims 2 to 5, characterized by an injecting nozzle valve ( 63 ) whose angle (δ) is adjustable and lockable in the respective desired position. Descaling device according to Claim 1 or one of Claims 2 to 6, characterized by a storage container ( 72 ), in which hydraulic oil is arranged, which by a by a motor ( 73 ) driven in their capacity adjustable pump in a line ( 74 ), which can be conveyed in a cylinder ( 76 ) of a printing cylinder ( 77 ), in which a differential piston ( 78 ) is guided longitudinally displaceable and sealing, the annular surface by the hydraulic oil via the line ( 75 ) and thereby moves the cylinder, with a water tank ( 79 ), which via a line ( 80 ) and a check valve ( 81 ) to a cylinder space ( 82 ) is connected to the pressure medium line, in which the smaller piston of the differential piston ( 78 ) is longitudinally displaceably and sealingly guided, and that the cylinder space in which the larger cylinder of the differential piston ( 78 ) is guided longitudinally displaceable and sealing, via a line ( 83 ) to an accumulator ( 84 ) is connected, which is formed in the illustrated embodiment as a pressurized gas container via a safety valve ( 85 ) to a return line ( 86 ) is connected to a shut-off device ( 87 ), wherein the differential piston ( 78 ) serves as a pressure intensifier, wherein the line ( 80 ) via the check valve ( 81 ) and the line ( 88 ) is connected to the high-pressure side of the pressure booster, wherein the pressurized medium - water - the nozzle valves ( 89 . 90 . 91 . 92 ) acted upon with three- / two-way valves ( 97 . 98 ), which serve for precontrol, with a filter ( 99 ) and a pressure relief valve ( 100 ) and a multi-way valve ( 101 ).

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