JPS59178147A - Screw press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A forging press, which is installed as a die forging machine for reasons of convenience, is equipped with a friction wheel transmission device (friction press).
Since the impact power is extended, in many cases 4 Q lvi
If it exceeds N (meganewtons), and in principle 8
If a full impact force of 0 M N or more is required, the press is equipped with a gear transmission. For this purpose, the flywheel is provided with an external toothing, on which the gear rim formed by the external toothing engages the motor and the driven pinion.

Activate the pinion /in addition, 'electric motor or /l
l j motor should be used.

The IL mode drive type has the advantage of being easier to supply energy, but produces peak currents.

This is because the necessary energy to be supplied to the flywheel must be obtained within the time the flywheel is accelerated to a predetermined number of revolutions.

Therefore, special wiring is required for the total limitation of the peak current r'N, which increases the construction cost and lengthens the cycle time.

Since the linear motor is accelerated from standstill to the required speed twice during each working interval and then braked, a corresponding loss of current heat cannot be avoided, and moreover, the ineffective energy consumed by the motor cannot be avoided. The disadvantage is that it causes a bump. The desired torque requires a correspondingly large and heavy motor, and this heavy motor has an unfavorable relationship between torque and thrust moment, and has the following structure: jjg
This can lead to the formation of defects. In other words, the screw, complete with the hand wheel and gear rim, is fixedly fixed in the axial direction on the upper side of the press stand, and the screw nut is inserted into the carriage of the soleless. This leads to the formation of structural defects in that the material becomes rough due to undesirable pressure and torsional stresses.

Hydraulic motors, especially Akinal piston motors, have smaller structural dimensions and a significantly lower power consumption compared to electric motors, so both 1U11 and 1U11 drive pinios can be used individually or in pairs. Can be placed in a diameter range of
It has the following structural points. In the next step, a screw with a flywheel and teeth [rim and rim] is inserted into the NAND inserted into the top side of the press stand. Only one positive force is applied in the area. In order to supply the hydraulic motor, an oil station consisting of an electric motor, an oil pump, a high pressure storage device, a control layer, a filtration device, an oil cooling device, etc. is necessary. It is placed on the factory floor or on the bench next to the Oino(Ste=/Yongen S press machine) and is connected to a hydraulic motor via a flexible high-pressure conduit that supplements the interlocking of the press. The construction cost of this tank is extremely high, taking into account the need for operational safety!

The present invention relates to a press of the type described above, which is equipped with a gear transmission driven by a hydraulic motor. In other words, the flywheel is connected to the screw through a slipping clutch so that one rotation is transmitted, and the NAND is inserted into the second part of the 7° rest stand! Axial direction j1) (moving screw and k (jiij adjusted screw) 0 less,
Said (on the flywheel, JJQ.

An external tooth row is formed over a width corresponding to the large press stroke and the force, which is the sum of the width of the moving pinion, and a plurality of pinions are provided that engage with the gear rim made up of this external tooth row. , the plurality of pinions are each driven by one or each pair of hydraulic Aquinal piston motors, and the 1ζ Aquinal piston motor equipped with the gear rim is mounted on the upper part of the press stand. The object of the present invention is to reduce the structural cost of the above-mentioned type of press and to improve its operational efficiency. It is to increase the

Having achieved this object, the invention provides a platform in which one axial piston motor or a pair of axial piston motors each assigned to one pinion is driven by one electric motor in each case. An adjustable pump for reversing the conveying direction is provided.

The advantage of the screw press according to the invention is that it has a high electric drive efficiency. This is because the extensive load offset that can occur with hydraulic tanks in conventional drive types with a central oil supply is eliminated. Furthermore, the disadvantages caused by electricity in a purely electric drive (high peak load on !18, high peak negative on !; 7ζ wiring limiting i, reactive power of the motor) and i7 of the screw bearing caused by the drive device
．． ) In order to avoid musical shortcomings and to take into account the reliability of operation in hydraulic drives, other hydraulic Nigozukuri 111S (one oil motor or one oil pair each assigned to one pinion) The disadvantages due to the arrangement of the motor (oil pump and control medium) are largely avoided by eliminating the part of the high-pressure oil line, in particular the part that compensates for the movement of the oil pressure. Overall, the advantages of the JTR solution of the present invention are significant over prior art solutions.

It is also possible to configure the plant form surrounding the upper crossbeam of the press stand at the same time as a storage container for oil and as a filler container. In order to increase the reliability of operation, according to another embodiment of the invention, the platform comprises an upper part of the press stand, which has a container, a cooler, a filter for the oil and a control element provided in the oil circuit. It is designed as an oil sump surrounding the crossbar 9 of the oil tank and as a leakage chamber for the total oil quantity in the oil circuit.

According to a further embodiment of the invention, each axial piston motor is assigned to each of seven pinions, or each one
A pump with control Jll+4 and reversible conveying direction, which is effected by a pair of axial piston motors and one electric motor in each case, is arranged in a closed circuit, which circuit is connected to the supply F? A plurality of stepped pressures (one of these steps can be controlled as a brake pressure) are used to close the medium of the tank and to release phlegm to the filling pump. It has a compact l'14.1;ν value and increases the reliability of operation by +1. stomach).

Next, the structure of the present invention will be specifically explained using an example of l::<l uji.

Stand 1 of the saw blade 0less forms a press stand 1-ru [snow? IS i:i, i bar 2, upper horizontal beam 3,
The support (-14) and the tightening head 6 cause the horizontal
It consists of a preloaded tensile rod 5 connecting the support 11.4 and the support 11.4. Pillar 4 ρ′(,
The upper half of the f19 molding is guided by a vertically moving carriage 7.The lower half of this carriage 7 is a double m of the lower horizontal beam 2
i is fixed at 8. The carriage 7 is moved 4X by screws 9. The screw 9 is recessed into a nut 10 placed in the horizontal beam 3 at the top of the stand 1. The nut 10 is supported axially on the one hand via a collar surface in an oppositely stepped hole in the crossbar 3;
On the other hand, it is held by a ring 11 fixed to the crossbar 3. Furthermore, a rotation holding member (not shown) for the nut 10 is provided within the cross beam 3. The lower end 1116 of the screw 9 and the head 12 are rotatably but axially connected to the carriage 7 by a double-acting axial bearing 13. Neshishaft 15
A clutch disc 16 is fixed to the pin 14, and this clutch disc 16 is frictionally connected to a springboard 17. For this reason, Kunsochi Yen/Saka 16 is the flywheel 17.
The tightening pin 20 is inserted between the boss 18 of the force 11 and the pressure ring 19.
It is tightened by. The torque transmitted by the frictional connection is increased by adjusting the preload of the spring packet 21 on the clamping pin 20. The gear rim 22 of the small momentum 17 is provided with an outer 1ψ row across its entire width, and the gear driver 22 is driven and assisted through all of the pinion 23 that engages with the tooth row. In the example of J[, a plurality of pinions 23, for example, six pinions 23, are provided on the outer periphery of the gear rim 2 (see FIG. 3).

The pinion 23 is supported within the shaft-mounting pedestal 24. This bearing pedestal 24 is attached to the upper side beam 3' of the stand 1.
Kj is supported by a surrounding platform 25. Each pinion 23 has an axial 2-stone motor 260 located at the second 1113 of the pinion/23, and an axial piston motor 2 located at the bottom of the pinion 23.
Move all 4 by 6u. The width of the gear rim 22 is
During the entire stroke of the screw 9 carried out by this tooth [L, 22, the beanion 23 always remains in contact with the external toothing of the gear rim 22.
ii::'? The dimensions are selected to the extent that it can be engaged with.

The engine 213o and 26u, which are attached to the biniono 23, are supplied with oil by one oil pump 27, each driven by one 110 auxiliary motor 28. is supplied. In this case, the bearing pedestal 24 of each one pinion 23
The axial piston motors 26o and 26u assigned to the pinion 23, the oil pump 27, and the electric motor 28
and supports. The oil supply pressure and supply amount of each oil pump 2γ can be adjusted, and the oil supply direction can also be reversed. Each oil pump 27 is connected via two parallel conduits 29 to a control block 30 with control medium. The 1J control block 30 itself is connected via two parallel conduits 31 to respective upper and lower Aki/Al piston motors 26.

The container or containers for storing, cooling and filtering the oil are indicated at 32. This container 32 supplies oil to fill the circuit and receives oil flowing from the circuit. An oil container 32 can be assigned to each circuit or a common oil container 32 can be arranged 4 in the circuits of the screw press halves or in the entire circuit. The platform 25 has an inner side wall 33 and an outer side wall 33.
2. Oil reservoir 3 with ;I and bottom, f, ;1ni33;n
3' (11°4) In this case, the oil reservoir 3
3 provides full hydraulic pressure and is present in the oil circulation path 1゛,
Constructed of sufficient dimensions to receive oil (11).

Hereinafter, the details of the driving force 11, 11, and 11, i++ are calculated based on the schematic diagram of oil 11J10, 6 in Figure 4, and theory 1 is made. 1 to 6, driven through six one-onions 23, comprising a screw 9 and a gear rim 22 connected to the screw 9 be done.

In Figure 4, note: 1 of these 6 uniions 23
The number 7 is shown. Each pinion 23 is driven by a pair of Aki/Aru piston motors, and the Aki/Ko is the 41st gear.
It is driven by one Aki/Al piston motor 26 as shown in FIG.

Aki/'no' Rubiston motor 26 has an oil pump 0
Oil is supplied by 27, and this oil pump 02
7, it is driven by the L motor 28. pump 27
By reversing the conveyance direction, the rotation direction of the Aki/Al piston motor 26 is also reversed. The A/A piston motor 26 acts as a working process to move the screw 9 downward in the 10,000 rotation direction, and in the other rotation 1H direction.
This acts as a return stroke to cause the same 9 to move upward and return to its starting position. The electric motor 28 (d) is operated at a constant speed during the acceleration phase for the downward and upward movement of the screw 9 and maintains a high electrical efficiency of the electric motor 28. The motor efficiency is converted and used completely by the oil pump 2γ, which acts as a torque converter.For this purpose, the oil valve knob 27 is actuated via a pressure gauge 35 and a control device 36 in relation to the pressure. Adjustment device 37.Adjustment device 37
In the advantageous axle/aluminum piston motor 0 used in this embodiment, the piston axis is swiveled toward the drive axis. This turning range is 9 for each working stroke and return stroke of the screw 9.
The turning angle is limited due to the helical rotation of the blade. This turning angle is determined by a constant i"!] li of the electric motor 28,
The number defines the oil bonder 2 funnel conveyance HH. ,
A piston cylinder device is used as the 1IA1 node device 37, and its negative force is the f! of the pump 39 driven by the electric motor 38. This is carried out in communication with the pressure reservoir 40 via the 1iX36.

During the 1'/l-operation process of the screw 9, the screw, the carriage 7
During the downward movement of the flywheel 17, the predetermined rotational speed is 't4j
It is accelerated by the drive device until the required amount is stored for the forging operation. The conveyance l of the pump 27, which corresponds to this rotational speed, is kept constant, and thus the rotational speed of the momentum l117 is also kept constant. Just before the upper forging die half fixed to the carriage γ hits the lower forging, l'J no. By being shifted to the left from 11'L'ii (4th! Nu 14g), the conduit 31 leading to the axial piston motor 26 is closed for a short time. A conduit 42a connecting the valve 41 to the pressure limiting valve 42 is placed so that in this conduit 42a the pressure (maximum operating pressure) which acts completely on the pressure limiting valve 42 is controlled by the relief valve 421). )
is formed, and when the control piston is shifted to the left within the four-stroke valve 41, the pressure within the conduit 42a disappears, so that 1. A short circuit is formed in the conduit 31 against the slight spring force of the fl <In spring. During this time, the conveying direction of the pump 27 is reversed. As soon as the pressing is finished, the four-stroke valve 41 returns to its non-working position, so that the screw 9 is driven in the opposite direction and accelerated to a predetermined rotational speed. Immediately before the upward movement of the screw 9 ends, the pump 27 rotates, and as a result, the flywheel 17 and the screw 9
The rotational speed of the screw 9 decreases to zero during the remaining nine strokes of the screw 9. The downward rotation causes the control piston in the four-stroke valve 41 to move from its non-working position to the right, causing the conduit 42 to move from its non-working position to the right.
a is connected to the second pressure limiting valve 43. The second pressure limiting valve 43 regulates the force 11J1 to stop the flywheel 17 via the pressure limiting valve 42, which causes the flywheel 17 to crawl. Limit pressure to low pressure.

Reverse 'l'j (when a small amount of oil i+i flows out as oil by the L1 limit valve 42, 43 and the four-stroke valve 41; i':J, closed by the port driven by the motor 44) 45 Supplied within the circuit.

11 by the pressure limiting valve 47, which is necessary for the pump 27.
A six-stroke valve 46 is provided which is centered by a spring and controlled by a pressure 101 in order to maintain the supplied supply pressure k i1'iM. This 6 stroke valve 4
6 is arranged so that the low pressure side of each of closed', ti, l iJl 1r6 is connected to the pressure limiting valve 47 by 1d. In this case, the member, clam j1:, is maintained by bo/no 045. oil'; A: '+'] to helmet fl, j
jA from the circuit to maintain the illumination and cool it down.
The container 32 is poured into the portion 32b of the container 32, pre-cleaned by settling, and the portion 32 of the container 32 is deposited in the portion 32b of the container 32.
The oil led to 2C is led through a filter 50 and a cooler 51 by a pump 049 assisted by an electric pump 48, and is stored in a container 320 section 32a.

According to the illustrated embodiment, the axial piston motor 26
(constant motor) and axial piston 7 Zenno 27 (
A regulating pump) and a -19 axial piston machine are provided. This is because the axial piston machine is most suitable. However, the invention is not limited to this axial piston machine only, but also suitable oil pumps and oil motors with different construction principles. Instead of the preferably closed circuit according to the exemplary embodiment shown, it is also possible to drive the oil motor and the oil pump in an open circuit.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a screw flange according to an embodiment of the present invention, Fig. 2 is a side view (fi), and Fig. 6 is a plan view.
．． FIG. 4 is a schematic hydraulic circuit diagram of the screw (screw) 0less according to FIG. 1. 1...stand, 2,3...horizontal beam, 4...post, anti-l
Jl rod, 6 Tightening head, 7- Carriage, 8
・Table 1-1j19 ・Screw, 1o Nut, 1
1 ring, 12 head, 13-Agi/Al'tII
Il receiver, 14 Bin, 15 Yaft, 16 Clutch disc, 17, flywheel, 18...Boss, 19-K1
f linog, 20...tightening pin, 21/banu packet,
22 Gear rim, 23... Vinyl word, 24 ・11!1
+1 pedestal rB<, 25-・Plant forno 3.26
, 26o, 26u...Axial piston e-ta, 27...Oil pump, 28.Electric motor, 2
9-conduit, 30 ・Control block, 31-conduit' (〒,:
32. Container, 33. Oil sump, 32a. 32+), :;2(:・part, 32a-side wall, 33b
j subsection, 3:6]...1 law wall, 35...pressure gauge, 36...
Control H+H+ device row, 3γ・Adjusting device, 38・Electric motor; 39 Point 0.40・-Pressure reservoir, 4-1・
-・4 rows 1'l'' valve, 42 Pressure limiting valve, 42a... Conduit, 421 Relief valve, 43... Pressure limiting valve, 44...
・Motor, 45 Pump, 46...6 stroke valve, 47...
Pressure City 1] l Exhibition well, 48... Electric motor, 49... Pump, 50... Filter, 51. Cooling section (1 other person) Fl[J 2

Claims (1)

[Claims] 1. fi? A machine press comprising a flywheel coupled to rotate together with the screw via a reclutch, and a screw moving axially in a nut inserted into a crosspiece of a part of the press stand, the flywheel being connected to the flywheel. , the maximum press stroke plus the drive and III pinion width, and a plurality of pinions are provided that engage the gear rim formed by the external tooth row. Then, each of the plurality of pinions is driven by one hydraulic axial piston motor or one pair of hydraulic axial piston motors. In the version arranged in a plant form with a burr, each one pinion/alternative piston motor (1-7) is assigned to one pinion (23) on the platform (25). 26) Or, each one of the Aki7al piston motors (26o, 26u) is provided with an adjustable and reversible pump (27) driven by one low-movement motor (28). 2. A screw press, characterized in that the platform (25) has a container (32), a cooler (51), a filter (50) for oil and a control member ( 30), configured as an oil sump (33) surrounding the upper crossbeam (3) of the press stand (1) and as a leakage chamber for the total oil quantity in the oil circuit. A press 0 to 6 according to range 1, with an axial piston motor (26) or a pair of axial piston motors (260° 26u) fitted with their respective pinions (23) and adjustable and - The l1'1 main pump (27) for reversing the feed direction was connected to the supply pressure and IH1 for multiple C1, g7 months, all the control parts, and to the 'zone 0' (45) for filling. arranged in a closed circuit, one of the plurality of pressure stages being controllable as brake pressure;
fj, $,, Iα Surroundings The press described in item 1 or 2.