CN1124910C - Synchronously automatic centering regulator for dual-jar pick-off unit and its regulation method - Google Patents

Abstract

The present invention relates to a synchronously automatic centering regulator for dual-tong pick-off mechanisms and a regulation method thereof. The synchronously automatic centering regulator is formed by that a pick-off vehicle, a pick-off mechanism regulator, a casting mold and a loop synchronous controller are connected with one another, wherein the pick-off mechanism regulator is arranged on the pick-off vehicle; the loop synchronous controller is connected with the pick-off mechanism regulator by a signal controlling pipeline; the pick-off mechanism regulator is formed by that tong rams, a fastening screw nut, a regulating screw nail, a rotating shaft, a bracket, an oil cylinder, a screw bolt, a shaft lug, a pin shaft, a pull rod, alloy pieces, an upper tong jaw, a lower tong jaw and chain pieces are together connected. The dual-tong pick-off mechanisms can synchronously and automatically center by the regulator through the regulation method of the regulator, and the success rate of the double tongs for picking in one step can be more than 95%.

Description

Adjuster and control method thereof in the synchronously automatic school of dual-jar pick-off unit

The present invention is adjuster and a control method thereof in the school synchronously automatically of dual-jar pick-off unit, belongs to centrifugal casting apparatus.

The removal mechanism of domestic and international single station or multistation centrifugal casting machine is general at present adopts one two pawl pincers, trielcon or multijaw pincers, centrifugal cast iron spare for small-bore (Φ 50mm～Φ 200mm), normal employing one is two pawls pincers or trielcon, and, usually when installing, equipment just pickup pincers and casting mold are adjusted to same center, production is during with a kind of product of specification, this center need not adjust all the time again, only just can be when the product of conversion different size with both centers school again in once.Different with above-mentioned type is, two casting mold centrifugal casting machines have two casting molds, and removal mechanism must be joined two secondary pickups pincers, and two secondary pickups pincers must move simultaneously when ordinary production.If adopt above-mentioned removal mechanism, difficulty is just compared at the center that each pickup all requires two secondary pickup pincers to aim at two casting molds simultaneously respectively, in actual production, often there is following several situation to occur: when 1. two pincers centers overlap with each self-corresponding casting mold center respectively, usually pickup is smooth, and the efficient of a pickup success can reach 100%; When 2. two pincers centers were all higher or on the low side than the casting mold center of correspondence, pickup was not smooth, and a pickup success rate of this situation is almost nil; 3. ought be wherein the center of secondary pincers more higher or on the low side than corresponding casting mold center, center of another secondary pincers is more on the low side or higher or when overlapping, a pickup success rate of these five kinds of states is about 50% than corresponding casting mold center; More than the mean value of a pickup success rate of several situations be about 30～35%, as seen, the efficient of a pickup success is lower.

Purpose of the present invention is exactly in order to overcome and solve general two pawls or the trielcon of adopting of removal mechanism of existing centrifugal casting machine, and require two pincers to aim at difficulty of two casting mold centers simultaneously respectively, in actual production, make the mean value of a pickup success rate only have 30～35%, low shortcoming and the problem that waits of success rate, adjuster and control method thereof in the synchronously automatic school of a kind of pair of casting mold horizontal centrifugal casting machine usefulness of research and design dual-jar pick-off unit, make the two secondary pickups pincers can synchronization actions and can adjust its center automatically and realize in the school to two casting molds the mean value of a pickup success rate being brought up to more than 95%.

The present invention realizes by following technical proposals: the structural representation of adjuster as shown in Figure 1 in the synchronously automatic school of dual-jar pick-off unit; Its removal mechanism controller structure schematic diagram is shown in Fig. 2～4; Principle schematic is shown in Fig. 5～7 in its automatic school, and its dual-jar pick-off unit synchronizing control loop apparatus structure schematic diagram as shown in Figure 8.Adjuster is connected and composed jointly by pickup car 1, removal mechanism adjuster 2,3, casting mold 4,5 and synchronizing control loop device in the synchronously automatic school of dual-jar pick-off unit, its interconnected relationship is: removal mechanism adjuster 2,3 is installed on respectively above the pickup car 1, and the synchronizing control loop device is connected with removal mechanism adjuster 2,3 by control signal pipeline 24,25; Wherein: removal mechanism adjuster 2 or 3 by tong arm 6, tighten up nut 7, adjustment screw 8, rotating shaft 9, carriage 10, oil cylinder 11 or 35, bolt assembly 12, axle ear 13, Assembly of pin 14,16,19,20, pull bar 15, hard metal tip 17, go up chela plate 18, chain sheet 21, chela plate 22 connects and composes jointly down, its interconnected relationship is: an end of tong arm 6 is connected with pickup car 1 by rotating shaft 9 and is supported on above the carriage 10; The other end of tong arm 6 is connected with chain sheet 21 by Assembly of pin 20; Chain sheet 21 is connected to form gripper with upper and lower chela plate 18,22, and gripper is connected with an end of pull bar 15 by Assembly of pin 16, and the other end of pull bar 15 is connected with oil cylinder 11 by axle ear 13; Oil cylinder 11 is fixed on the tong arm 6 by bolt assembly 12; Adjustment screw 8 is installed on above the carriage 10; Removal mechanism synchronizing control loop device is by pumping plant 31, a pressure valve 32, overflow valve 33, reversal valve 30,34, one-way throttle valve 26,27,28,29 and pipeline 24,25 connect and compose jointly, and its interconnected relationship is: pumping plant 31 is connected with reversal valve 30,34 with overflow valve 33 respectively; Overflow valve 33 is connected with a pressure valve 32; Reversal valve 30,34 is connected with one-way throttle valve 26,27,28,29; One-way throttle valve 26 and 27 is connected in parallel; One-way throttle valve 28 be connected with the two ends of oil cylinder 11,35 respectively by pipeline 24,25 again after 29 are connected in parallel.

The control method of adjuster is as follows in the school synchronously automatically of this dual-jar pick-off unit: the adjustment process in the school is automatically synchronously, and gripper is in releasing orientation before the pickup, and the center of gripper all is positioned at the below (see figure 5) at casting mold center; The hydraulic oil cylinder driving pull bar opens gripper during pickup, and chela at first touches the lower inner wall of foundry goods and compresses the foundry goods (see figure 6) gradually under gripper opens in the process; Then force the gripper center up to be moved, realize the left and right sides fine motion adjusting of horizontal direction simultaneously by between bearing pin 16 and the pull bar and the gap between bearing pin and the pin shaft hole, in the school of the direction that is up to the standard, up to the contact of last chela and when compressing on the foundry goods inwall, the center nature of two grippers overlaps (see figure 7) with the center of casting mold; The driving oil cylinder of two pickups pincers is connected in parallel and 4 one-way throttle valves are set in oil piping system, make their the pincers speed of opening identical, the actions of two pincers just can be synchronously; The tong arm of this adjuster can be up and down within the specific limits; In opening the pincers process, in case chela is depressed into the foundry goods lower inner wall down, under the reaction force of foundry goods, tong arm just can and draw close the gripper center around skew on the axial rotary gradually to the casting mold center, till two centers overlap; By the effect of movable tong arm, gripper and casting mold can be finished process in the mutual school automatically; When the casting mold of displacement different size, only need replacing dewclaw nipper and chain sheet to get final product; The also available screw fine setting of this adjuster, the gripper center should be below the casting mold center before opening pincers, adjustment screw is installed on the carriage, can by it regulate gripper center and casting mold center before pickup relative position and their vertical range is remained between more suitable 3～5 millimeters; The accurate distance of level is fixed between two pincers, and the spacings of two pincers horizontal directions are to adjust in advance on the pickup car and be added on fixing according to the horizontal range at two casting mold centers; Regulating in the school of every secondary pickup pincers horizontal direction is to realize by the left and right sides fine motion of the gap between the gap between dewclaw nipper and the pull bar and bearing pin and the pin shaft hole in opening the pincers process; The driving cylinder of this adjuster is connected in parallel, two direction of pull unanimities of two removal mechanism, and the driving force direction of these pincers tensioning is consistent with the pickup direction of pull, this helps chela fully to sting tight foundry goods inwall, reduces skidding, and foundry goods is taken out smoothly.

The present invention compared with prior art has following advantage and beneficial effect: (1) this adjuster is compared with the sort of fixed tong arm that can not regulate the center automatically, and in performance and use, the former wants much good and practical; Two pawl nippers are tungsten carbide buttons, and the hardness ratio hardness of grey iron of carbide alloy T8 is much higher, help gripper and sting tight foundry goods, and it can successfully be taken out from casting mold.And two pawl nippers and trielcon and multijaw nipper are relatively, obviously, structurally two pawls more simple, be more convenient for daily maintenance and loading and unloading; (2) with the removal mechanism of this adjuster, when the casting mold of displacement different size, only need replacing dewclaw nipper and chain sheet to get final product, also more or less freely and quick for the relative position of adjusting between two jaws and casting mold.This two pawls pincers more are adapted to produce small-bore (Φ 50mm～Φ 200mm) foundry goods, are particularly suitable for production weight is light, length is short iron drain-pipe and other sleeve class alloy-steel casting; (3) the pickup pincers adopt mode in the different schools, and its pickup effect is made a world of difference.For example, when the center fixation of two pickups pincers, all can aim at casting mold center separately respectively owing to be difficult to guarantee in each pickup process two pincers centers, thereby the efficient of a pickup success is lower; When installing in this school of two pickups pincers employing, owing to can get rid of the situation that the former misaligns, the pickup success rate just greatly improves, and the contrast situation sees also in the automatic school of gripper center fixation and gripper, following table 1:

Below Figure of description is further specified as follows: Fig. 1 is the structural representation of adjuster and control method thereof in the school synchronously automatically of dual-jar pick-off unit, Fig. 2～4th, dual-jar pick-off unit adjuster schematic diagram, wherein Fig. 3 be the A-A of Fig. 2 to view, Fig. 4 is that the B-B of Fig. 2 is to view; Fig. 5～Fig. 7 is a situation schematic diagram in the synchronously automatic school of this adjuster, and wherein: Fig. 5 is that two gripper centers all are positioned at casting mold central lower situation schematic diagram; Fig. 6 is that down chela at first touches foundry goods lower inner wall and measuring phase schematic diagram gradually; Fig. 7 is that two gripper centers overlap the situation schematic diagram with the casting mold center; Fig. 8 is removal mechanism synchronizing control loop figure.

Table 1

During the jaw center fixation, the relative position at jaw center and casting mold center		Pickup success rate (%)	Average efficiency (%)	In the time of in the automatic school of jaw, the relative position at jaw center and casting mold center		Pickup success rate (%)	Remarks
								Pincers 1	Pincers 2	Pincers 1	Pincers 2
The top	The top			0～10	30～ 35							The top	The top		Can get rid of
		The top	Centering			～50	The top	Centering		Can get rid of
The top	The below			Almost zero							The top	The below		Can get rid of
		Centering	The top			～50	Centering	The top		Can get rid of
Centering	Centering			100							Centering	Centering	100
		Centering	The below			＜50	Centering	The below		Can get rid of
The below	The top			Almost zero							The below	The top		Can get rid of
		The below	Centering			＜50	The below	Centering		Can get rid of
The below	The below			Zero							The below	The below		Can get rid of

Embodiments of the present invention can be as follows: (1) presses Fig. 1～shown in Figure 4, design, processing, makes or orders, chooses each parts, for example, the all available machine-tooled method processing and manufacturing of these parts, but tong arm 6 A3 steel, rotating shaft 9 can select for use the 35# steel to make, but pickup car 1 A3 steel is welded; Carriage 10 can be made with the A3 steel, bearing pin 14,16,19,20 can be made with the 35# steel, chain sheet 21 can be made with the 45# steel, upper and lower nipper 18,22 can be made with the A3 steel, pull bar 15 can be made with the A3 steel, axle ear 13, bolt assembly 12, all available A3 steel of adjustment screw 8 are made, oil cylinder 11 can be ordered by required specification, and tightening up nut 7 can choose by required specification in market; Processing and chosen each parts after, can be by shown in Fig. 1～4, and be connected and installed by the described interconnected relationship of top specification, just can implement the removal mechanism adjuster; (2) by shown in Figure 8, the seamless steel pipe of pipeline 24,25 optional Φ 18 * 3 specifications; One-way throttle valve 26,27,28,29 optional LI-63B types; Reversal valve 30,34 optional 22D ₂-63B type; Pumping plant 31 optional BZ100/y types; Play pressure valve 32 optional 22D ₂-10B type; Overflow valve 33 optional ECG-06B types; Oil cylinder 11,35 optional Φ 63 * 50 specifications.After having chosen each parts, and connection is installed by the described annexation of top specification, just can be made into removal mechanism synchronizing control loop device, described by top specification again, the synchronizing control loop device is connected with the removal mechanism adjuster, through simple debugging, just can implement this adjuster preferably again.The inventor is through in a few years research, design, test, in school-run workshop of South China Science ﹠ Engineering University, produced this adjuster model machine, through on centrifugal tube casting machine, carrying out the application test by the above control method of top specification, respond well, reached purpose of the present invention.

Claims (3)

1, adjuster in a kind of synchronously automatic school of dual-jar pick-off unit, it is characterized in that: it is connected and composed jointly by pickup car (1), removal mechanism adjuster (2,3), casting mold (4,5) and synchronizing control loop device, its interconnected relationship is: removal mechanism adjuster (2,3) is installed on respectively above the pickup car (1), and the synchronizing control loop device is connected with removal mechanism adjuster (2,3) by control signal pipeline (24,25); Wherein: removal mechanism adjuster (2) or (3) by tong arm (6), tighten up nut (7), adjustment screw (8), rotating shaft (9), carriage (10), oil cylinder (11) or (35), bolt assembly (12), axle ear (13), Assembly of pin (14,16,19,20), pull bar (15), hard metal tip (17), go up chela plate (18), chain sheet (21), chela plate (22) connects and composes jointly down, its interconnected relationship is: an end of tong arm (6) is connected with pickup car (1) by rotating shaft (9) and is supported on above the carriage (10); The other end of tong arm (6) is connected with chain sheet (21) by Assembly of pin (20); Chain sheet (21) is connected to form gripper with upper and lower chela plate (18,22), and gripper is connected by the end of Assembly of pin (16) with pull bar (15), and the other end of pull bar (15) is connected with oil cylinder (11) by axle ear (13); Oil cylinder (11) is fixed on the tong arm (6) by bolt assembly (12); Adjustment screw (8) is installed on above the carriage (10).

2, by adjuster in the synchronously automatic school of the described a kind of dual-jar pick-off unit of claim 1, it is characterized in that described removal mechanism synchronizing control loop device is by pumping plant (31), a pressure valve (32), overflow valve (33), reversal valve (30,34), one-way throttle valve (26,27,28,29) and pipeline (24,25) connect and compose jointly, and its interconnected relationship is: pumping plant (31) is connected with reversal valve (30,34) with overflow valve (33) respectively; Overflow valve (33) is connected with a pressure valve (32); Reversal valve (30,34) is connected with one-way throttle valve (26,27,28,29); One-way throttle valve (26) is connected in parallel with (27); One-way throttle valve (28) be connected with the two ends of oil cylinder (11,35) respectively by pipeline (24,25) again after (29) are connected in parallel.

3, the control method of adjuster in a kind of school synchronously automatically of dual-jar pick-off unit is characterized in that: the adjustment process in the school is automatically synchronously, and gripper is in releasing orientation before the pickup, and the center of gripper all is positioned at the below at casting mold center; The hydraulic oil cylinder driving pull bar opens gripper during pickup, and chela at first touches the lower inner wall of foundry goods and compresses foundry goods gradually under gripper opens in the process; Then force the gripper center up to be moved, realize the left and right sides fine motion adjusting of horizontal direction simultaneously by between bearing pin (16) and the pull bar and the gap between bearing pin and the pin shaft hole, in the school of the direction that is up to the standard, up to the contact of last chela and when compressing on the foundry goods inwall, the center nature of two grippers has overlapped with the center of casting mold; The driving oil cylinder of two pickups pincers is connected in parallel and 4 one-way throttle valves are set in oil piping system, make their the pincers speed of opening identical, the actions of two pincers just can be synchronously; The tong arm of this adjuster can be up and down within the specific limits; In opening the pincers process, in case chela is depressed into the foundry goods lower inner wall down, under the reaction force of foundry goods, tong arm just can and draw close the gripper center around skew on the axial rotary gradually to the casting mold center, till two centers overlap; By the effect of movable tong arm, gripper and casting mold can be finished process in the mutual school automatically; When the casting mold of displacement different size, only need replacing dewclaw nipper and chain sheet to get final product; The also available screw fine setting of this adjuster, the gripper center should be below the casting mold center before opening pincers, adjustment screw is installed on the carriage, can by it regulate gripper center and casting mold center before pickup relative position and their vertical range is remained between more suitable 3～5 millimeters; The accurate distance of level is fixed between two pincers, and the spacing of two pincers horizontal directions is the horizontal ranges according to two casting mold centers, adjusts in advance on the pickup car and is added on fixing; Regulating in the school of every secondary pickup pincers horizontal direction is to realize regulating by the left and right sides fine motion of the gap between the gap between dewclaw nipper and the pull bar and bearing pin and the pin shaft hole in opening the pincers process; The driving cylinder of this adjuster is connected in parallel, two direction of pull unanimities of two removal mechanism, and the driving force direction of these pincers tensioning is consistent with the pickup direction of pull, this helps chela fully to sting tight foundry goods inwall, reduces skidding, and foundry goods is taken out smoothly.

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