CN2920474Y - Digital controlled hydraulic stretching machine - Google Patents

Abstract

The utility model provides a digital controlled hydraulic stretching machine; the machine includes a machine frame which is arranged on a bearing oil box and integrated to one body by a round nut, a locking nut and an adjusting nut; the top of the machine frame is fixed with a guide element and a drawing oil tank to be connected with the punch element; the bottom of the machine frame is fixed with a mould-locking element and a mould-locking oil tank and still includes an electrical system, a digital control device and a hydraulic system. The beneficial effects are that the equipment has high production efficiency, small size and mould-locking force; the device has an amplification function to the mould-locking force; a small oil tank can produce the relatively large mould-locking force; the drawing depth is large and the device can save the energy and lower the consumption; when the device is used as the punch blanking and trimming, the drawing depth and mould-locking force can be adjusted according to the actual needs; thus the device effectively controls the molding quality of the products, improves the service life of the mould and prevents the breaking and wrinkling phenomena in the drawing process. The equipment can be widely used in all the industries which need the drawing technology, such as the automotive parts, fire equipment, aluminum products, ceramic products, stainless steel products, daily hardware and so on.

Description

Numerical control hydraulic pull and stretch machine

Technical field

The utility model relates to a kind of numerical control hydraulic pull and stretch machine, and these pull and stretch facility have the function of big clamp force in the time of can using small oil tank can satisfy pull and stretch with less hydraulic pressure power output.

Background technology

Common pull and stretch machine is the general equipment of use of processing five metals drawing part product institute on the existing market, is applicable to the drawing and forming to various sheet metals, as the drawing and forming of unlike materials such as aluminium sheet, copper coin, steel plate, corrosion resistant plate.But in the production use, the mould volume of common hydro-drawing machine is big, make complicated, caused the cost height, equipment will carry out the locked mode pressurize to mould in drawing process, has increased the energy consumption of lathe again, and operation is very complicated during the Installation and Debugging mould, defectives such as production efficiency is low, and floor space is big.Standard machinery pull and stretch body is long-pending huge and high, and large equipment can only be produced miscellaneous goods, has increased the energy consumption of lathe again, also has ceaselessly defectives such as pull and stretch action is up and down turned round, safety coefficient is not high, and production efficiency is low, and noise is big.

Summary of the invention

For solving the problem that exists in the above-mentioned technology, the purpose of this utility model provides a kind of numerical control hydraulic pull and stretch machine, is to accelerate operating rate to solve one, enhances productivity; The 2nd, cut down the consumption of energy, reduce equipment volume, save cost.

For achieving the above object, the technical solution adopted in the utility model provides a kind of numerical control hydraulic pull and stretch machine, this machine includes the frame on the fuel tank that is installed in load-bearing, be fixed with the pull and stretch oil cylinder at frame top, be fixed with clamping mechanism and Mode-locking oil cylinder in the frame bottom, also include electrical system, numerical control device and hydraulic system, wherein: described frame includes at least four identical columns and passes pull and stretch oil cylinder platen successively, the locked mode platen, working plate combines with support, and pass through round nut respectively, locking nut, adjusting nut is linked as a fixed frame, and be installed on the described fuel tank, on described locked mode platen and working plate, respectively be provided with the T type groove that two installation molds are used;

Described clamping mechanism is installed in the centre of the working plate and the support of frame, and slide at the working plate easy on and off, this mechanism includes upper bracket, and by on the working plate that is bolted to described frame, upper bracket is connected with an end of long connecting rod by bearing pin, the other end of long connecting rod is connected by bearing pin with an end of elbow connecting rod, the other end of elbow connecting rod is connected by bearing pin with undersetting, undersetting is by being bolted on the described support, on frame, be fixed with an end of the guide rod that extends through sliding support, the other end of guide rod is fixed by hex nut by the backing-out punch base plate, the backing-out punch seat is fixed on the backing-out punch base plate by hexagon socket cap head screw, the backing-out punch nut is screwed in and inserts ejecting on the screw rod in the backing-out punch seat, is connected with an end of short connecting rod with sliding support by bearing pin, and the other end of short connecting rod and elbow connecting rod are connected and fixed by bearing pin;

Described Mode-locking oil cylinder includes oil cylinder guiding end cap, cylinder body, cylinder cover, be fixed on the support of described frame by hex nut with stud, by round nut piston in the Mode-locking oil cylinder and piston rod locking are connected as a single entity, on the cylinder cover of Mode-locking oil cylinder, are provided with trimmer valve;

Described pull and stretch oil cylinder extends through cylinder cover by stud and is fixed on the described pull and stretch oil cylinder platen by hex nut; the pull and stretch oil cylinder includes the piston by the fixedly connected one of round nut; hollow shaft-like piston rod and cylinder body; piston and piston rod are at cylinder body and be located in the guiding end cap of inferior part of the cylinder block and slide up and down; the pull and stretch oil cylinder has guiding mechanism and punch mechanism is installed; by screw the pull and stretch screw rod is fixedly mounted in the piston rod; insert dress mould screw rod is arranged in pull and stretch screw rod one stomidium; dress mould screw rod one end has screw thread; other end polished rod part; the polished rod position that described installation punch mechanism is included in dress mould screw rod is established and is crossed elongated slot; there is 5 °～15 ° inclined-plane its end; insert in pull and stretch screw rod one stomidium by dress mould screw rod; on the pull and stretch screw rod, be provided with pressing plate; tapered wedges in bolt passes pressing plate and places horizontal wedge anchorage seat is connected; tapered wedges one end has 5 °～15 ° inclined-plane; the threaded end of dress mould screw rod is connected with the pull and stretch punch; screw bolt; tapered wedges is strained; under the ramp effect of tapered wedges; promote dress mould screw rod and up carry, pull and stretch punch end face and pull and stretch screw rod end face are fixed together tightly.

Described hydraulic system includes fuel tank, hydraulic pump, motor, shaft coupling and is fixed on hydraulic manifold block on the described support, electro-hydraulic reversing valve, check valve and overflow valve to be formed, on described motor, be fixed with the hydraulic pump that is connected with pump seat, rotate by described shaft coupling, install and fix electro-hydraulic reversing valve, check valve, overflow valve on described hydraulic manifold block, hydraulic manifold block is provided with into and out of hydraulic fluid port and overfall.

Being provided with axle in described Mode-locking oil cylinder seals with combination seal with combination seal and hole.

The guiding mechanism of described pull and stretch screw rod includes the gathering sill that is located on the pull and stretch screw flight, work is straight-line up and down in gathering sill is fixed on feather key in the fairlead by screw, one end of pull and stretch screw rod is connected with by the fixing guided bearing circle of circlip for shaft, be installed on the pull and stretch screw rod by adjusting nut and locking nut, and the length that fixes and regulate the pull and stretch screw rod by piston rod nut, guide and limit bar by bolting is arranged on pull and stretch oil cylinder platen, at the other end of piston rod guide collar by bolting is arranged, make guide collar moving linearly up and down in the guide and limit bar.

Effect of the present utility model is: this equipment is innovated at the hydraulic system of common deep drawing hydraulic machine and standard machinery pull and stretch machine, cylinder part, control system etc.; the needs of big clamp force when this equipment makes small oil tank just can satisfy pull and stretch with less hydraulic pressure power output; simultaneously when clamping mechanism arrives top dead centre; Mode-locking oil cylinder is consumed energy no longer, but also can carry out drawing depth and clamp force adjustment according to actual needs.Use that this equipment makes the production efficiency height, volume is little, clamp force is big; clamping mechanism applied mechanics principle is adopted the toggle parts; this mechanism has the amplification of power; so a small oil tank can produce bigger clamp force; drawing depth is dark, energy-saving and cost-reducing; and can be as punch press blanking and side cut; can carry out drawing depth and clamp force adjustment according to actual needs; control the forming quality of product so effectively; improved die life, prevented from drawing process to be pulled open and phenomenon such as wrinkling.This equipment is applicable to the pull and stretch of plastic deformation thin plate, blanking, side cut, punching press, bending, flanging, extruding, to the compacting of pulverulent product, to the needs of technologies such as the press-fiting of parts, alignment.Can be widely used in auto-parts, fire-fighting equipment, aluminum products, enamelware, stainless steel products, haberdashery and hardware one is essential with the industry of deep-drawing technique.

Description of drawings

Fig. 1 is a pull and stretch machine assembly of the present utility model;

Fig. 2 is the rack section structural representation of Fig. 1;

Fig. 3 is the pull and stretch oil cylinder part-structure schematic diagram of Fig. 1;

Fig. 4 is the clamping mechanism part-structure schematic diagram of Fig. 1;

Fig. 5 is the Mode-locking oil cylinder part-structure schematic diagram of Fig. 1;

Fig. 6 is the hydraulic system structure schematic diagram of Fig. 1;

Fig. 7 is that the punch structure schematic diagram is installed in pull and stretch oil cylinder pull and stretch screw rod bottom among Fig. 3.

Among the figure:

1, pull and stretch oil cylinder

1-1, hex nut 1-2, stud 1-3, cylinder cover

1-4, round nut 1-5, piston 1-6, piston rod

1-7, circlip for shaft 1-8, hole combination seal 1-9, guided bearing circle

1-10, cylinder body 1-11, pull and stretch screw rod 1-12, axle combination seal

1-13, guiding end cap 1-14, screw 1-15, feather key

1-16, guide collar 1-17, piston rod nut 1-18, fairlead

1-19, adjusting nut 1-20, locking nut 1-21, bolt

1-22, pressing plate 1-23, guide and limit bar 1-24, tapered wedges

1-25, bolt 1-26, wedge block 1-27, dress mould screw rod

1-28, screw 1-29, bolt

2, frame

2-1, locking nut 2-2, round nut 2-3, pull and stretch oil cylinder platen

2-4, column 2-5, adjusting nut 2-6, locked mode platen

2-7, working plate 2-8, support 2-9, backing-up screw

3, clamping mechanism

3-1, eject screw rod 3-2, backing-out punch nut 3-3, bolt

3-4, upper bracket 3-5, backing-out punch seat 3-6, backing-out punch base plate

3-7, long connecting rod 3-8, hex nut 3-9, hexagon socket cap head screw

3-10, bearing pin 3-11, short connecting rod 3-12, elbow connecting rod

3-13, guide rod 3-14, bearing pin 3-15, undersetting

3-16, sliding support

4, Mode-locking oil cylinder

4-1, piston rod 4-2, axle combination seal 4-3, oil cylinder guiding end cap

4-4, cylinder body 4-5, stud 4-6, round nut

4-7, piston 4-8, hole combination seal 4-9, hex nut

4-10, cylinder cover

5, electrical system 6, numerical control device 7, hydraulic system

7-1, electro-hydraulic reversing valve 7-2, overflow valve 7-3, check valve

7-4, hydraulic manifold block 7-5, hydraulic pump 8, fuel tank 9-1, pull and stretch punch

The specific embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated numerical control hydraulic pull and stretch machine structure of the present utility model and course of action.

The operation principle of this numerical control hydro-drawing machine is: as shown in Figure 1; this machine includes the frame 2 on the fuel tank 8 that is installed in load-bearing; be fixed with pull and stretch oil cylinder 1 at frame 2 tops; be fixed with clamping mechanism 3 and Mode-locking oil cylinder 4 in frame 2 bottoms; also include electrical system 5, numerical control device 6 and hydraulic system 7; drive hydraulic pump by motor by shaft coupling; produce the hydraulic pressure energy; by the oil cylinder of numerical control control electro-hydraulic reversing valve control pull and stretch oil cylinder 1 and clamping mechanism 3, thereby finish the forming technology process that locked mode one pull and stretch one moves back mould one die sinking (material returned).

The structure mid frame 2 of numerical control hydraulic pull and stretch machine of the present utility model as shown in Figure 2, at least four identical column 2-4 pass successively by pull and stretch oil cylinder platen 2-3, locked mode platen 2-6, working plate 2-7,2-8 combines with support.At least four root posts are combined into a fixed frame 2 by pull and stretch oil cylinder platen 2-3 and round nut 2-2, locking nut 2-1, adjusting nut 2-5, locked mode platen 2-6, working plate 2-7, support 2-8, and be installed on the fuel tank 8, support 2-8 then is assemblied on the fuel tank 8, each locking nut 2-1 is furnished with backing-up screw 2-9, as long as tighten backing-up screw 2-9, just can prevent that locking nut 2-1 is loosening.Between locked mode platen 2-6 and the working plate 2-7 distance, only need to adjust adjusting nut 2-5, make it to reach the clamp force that the product pull and stretch needs.Two T type grooves are respectively arranged on locked mode platen 2-6 and the working plate 2-7, install and use for mould.

Described clamping mechanism 3 as shown in Figure 4; described clamping mechanism 3 is installed in the centre of the working plate 2-7 and the support 2-8 of frame 2; and slide at working plate 2-7 easy on and off; this mechanism includes upper bracket 3-4; and be fixed on by bolt 3-3 on the working plate 2-7 of described frame 2; upper bracket 3-4 is connected with the end of long connecting rod 3-7 by bearing pin 3-14; the other end of long connecting rod 3-7 is connected by bearing pin 3-14 with the end of elbow connecting rod 3-12; the other end of elbow connecting rod 3-12 is connected by bearing pin 3-14 with undersetting 3 15; undersetting 3-15 is fixed on the described support 2-8 by bolt 3-3; on frame 2-8, be fixed with the end of the guide rod 3-13 that extends through sliding support 3-16; the other end of guide rod 3-13 is fixed by hex nut 3-8 by backing-out punch base plate 3-6; backing-out punch seat 3-5 is fixed on the backing-out punch base plate 3-6 by hexagon socket cap head screw 3-9; backing-out punch nut 3-2 is screwed in and inserts ejecting on the screw rod 3-1 in the backing-out punch seat 3-5; be connected with the end of short connecting rod 3-11 by bearing pin 3-10 with sliding support 3-16; the other end of short connecting rod 3-11 and elbow connecting rod 3-12 are connected and fixed by bearing pin 3-10, make Lip river alive, each movable position not have stuck phenomenon.Eject screw rod 3-1 and be used for the liftout effect, if need not liftout attachment when work, can directly take out and eject screw rod 3-1, it is extremely convenient to load and unload.

Described Mode-locking oil cylinder 4 as shown in Figure 5, include oil cylinder guiding end cap 4-3, cylinder body 4-4, cylinder cover 4-10, be fixed on by hex nut 4-9 with stud 4-5 under the platen of support 2-8 of described frame 2, piston 4-7 and piston rod 4-1 are fused by round nut 4-6 locking, are provided with trimmer valve on cylinder cover 4-10.Seal all adopts axle combination seal 4-2 and hole combination seal 4-8, and material is low friction filled polytetrafluoroethylene ring and O type rubber seal, compositions such as guide ring.

The pull and stretch oil cylinder 1 that has guiding mechanism and installation punch mechanism is as Fig. 3, shown in Figure 7; pull and stretch oil cylinder 1 is fixed by stud 1-2 and pull and stretch oil cylinder platen 2-3; piston rod 1-6 is a hollow stem, is made up of pull and stretch screw rod 1-11, guided bearing circle 1-9, fairlead 1-18, feather key 1-15, guide collar 1-16 and guide and limit bar 1-23, piston rod nut 1-17, adjusting nut 1-19, locking nut 1-20 etc.The distance of regulating pull and stretch screw rod 1-11 is to realize with adjusting nut 1-19 after unscrewing (reverse) locking nut 1-20, guide effect by feather key 1-15, so 1-11 moving linearly of pull and stretch screw rod, its regulated quantity is to decide according to the pull and stretch workpiece size.Insert dress mould screw rod 1-27 is arranged in pull and stretch screw rod 1-11 one stomidium; dress mould screw rod 1-27 one end has screw thread; other end polished rod part; the polished rod position that described installation punch mechanism is included in dress mould screw rod 1-27 is established and is crossed elongated slot; there is 5 °～15 ° inclined-plane its end; insert in pull and stretch screw rod 1-11 one stomidium by dress mould screw rod 1-27; dress mould screw rod 1-27 afterbody adopts tapered wedges 1-24 clamping device to be connected with pull and stretch screw rod 1-11; promptly on pull and stretch screw rod 1-11, be provided with pressing plate 1-22; tapered wedges 1-24 in bolt 1-25 passes pressing plate 1-22 and places the horizontal wedge anchorage seat 1-26 that adorns mould screw rod 1-27 afterbody is connected; tapered wedges 1-24 one end has 5 °～15 ° inclined-plane; the threaded end of dress mould screw rod 1-27 is connected with pull and stretch punch 9-1; screw bolt 1-25; tapered wedges 1-24 is strained; under the ramp effect of tapered wedges 1-24, promote dress mould screw rod 1-27 and up carry, pull and stretch punch 9-1 end face and pull and stretch screw rod 1-11 end face are fixed together tightly.

Guide collar 1-16 and guide and limit bar 1-23 prevent that piston rod 1-6 from rotating.Seal all adopts axle combination seal 1-12 and hole combination seal 1-8, and material is low friction filled polytetrafluoroethylene ring and O type rubber seal, compositions such as guide ring.

Described hydraulic system 7 as shown in Figure 6, hydraulic manifold block 7-4, the electro-hydraulic reversing valve 7-1, check valve 7-3 and the overflow valve 7-2 that include fuel tank 8, hydraulic pump 7-5, motor, shaft coupling and be fixed on the described support 2-8 form, on described motor, be fixed with the hydraulic pump 7-5 that is connected with pump seat, rotate by described shaft coupling, install and fix electro-hydraulic reversing valve 7-1, check valve 7-3, overflow valve 7-2 on described hydraulic manifold block 7-4, hydraulic manifold block 7-4 is provided with into and out of hydraulic fluid port and overfall.Hydraulic system 7 is transmitted and the liquid that shares out the work in order to produce, and makes this machine realize exercises.Lubricating of electromagnetism check valve supply clamping mechanism 4 each movable position.Fuel tank 8 is a weldment, and it is supporting the weight of each parts of pull and stretch machine, fills up hydraulic oil according to type in its capacity case.

Described electrical system 5 and numerical control device 6 are the technology of existing common pull and stretch machine routine, can be manually control and the two-in-one circuit of automatic control, control action instruction to the controlling of each electro hydraulic valve in the hydraulic means and Oil pump electrical machinery, also can constitute automatic control system controlling each electro hydraulic valve in the hydraulic means and Oil pump electrical machinery by existing man-computer interface, Programmable Logic Controller, rotary encoder, oil cylinder stroke mechanism and drive circuit by hand push button.

Numerical control device 6 operations to this numerical control hydraulic pull and stretch machine are illustrated:

Button and displaying symbol explanation on the control panel panel:

Red light shows the energising of this equipment of expression, and green light shows this machine of expression in working order.

Parameter is provided with: button and displaying symbol are clicked the man-computer interface display screen on the panel, eject main menu, click parameter and the ejection submenu are set, split cavity backhaul, the setting of pull and stretch backhaul and dwell time.

The die sinking backhaul is provided with: click die sinking backhaul is provided with key and the numerical chracter frame promptly occurs, selects data.Click then and determine that selected data show.

Use locked mode, pull and stretch, when moving back mould, die sinking key, only effective manually the time, rotary switch is forwarded to manipulated key, press correspondent button, carry out corresponding action.

When using auto-programming key, unidirectional key, two-way key, single action, only effective automatically the time, when rotary switch is forwarded to unidirectional key, press the auto-programming button, program is carried out work by following process, at first for locked mode one pull and stretch (having the dwell time to be provided with) moves back mould one die sinking, unison counter accumulative total adds 1, gets back to automatic armed state.When needing two-way die sinking, rotary switch is forwarded to two-way key, press the auto-programming key, program is carried out work by following process, and locked mode one pull and stretch (having the dwell time to be provided with) moves back mould/die sinking (working simultaneously).Unison counter accumulative total is got back to automatic armed state.When rotary switch is forwarded to the single action key, press the pull and stretch oil cylinder key on the screen again, press the auto-programming button, program is carried out work by following process, and pull and stretch one moves back mould, gets back to automatic armed state.Press Mode-locking oil cylinder key button on screen, program is carried out work by following process, and automatic armed state is got back in locked mode one die sinking (can cut edge).The man-computer interface display screen can show every working procedure and each run-length data.

All enter the current functional status that is provided with recently after setting completed, more than four job orders, just finish one action circulation (locked mode one pull and stretch one moves back mould one die sinking).

The power supply of electrical system 5 adopts three-phase and four-line, and voltage is 380 volts, and motor starts by A.C. contactor, drives oil pump 7-5 and pressure oil output by shaft coupling.Adopting miniature circuit breaker, electrothermal relay is the usefulness that plays protection when line short leaks electricity.When auto-programming is worked, by the work of the whole operation of numerical control device 6 controls.

Claims (3)

1, a kind of numerical control hydraulic pull and stretch machine; this machine includes the frame (2) on the fuel tank (8) that is installed in load-bearing; be fixed with pull and stretch oil cylinder (1) at frame (2) top; be fixed with clamping mechanism (3) and Mode-locking oil cylinder (4) in frame (2) bottom; also include electrical system, numerical control device and hydraulic system (7), it is characterized in that:

Described frame (2) includes at least four identical columns (2-4) and passes pull and stretch oil cylinder platen (2-3), locked mode platen (2-6), working plate (2-7) successively and combine with support (2-8), and be linked as a fixed frame (2) by round nut (2-2), locking nut (2-1), adjusting nut (2-5) respectively, and be installed on the described fuel tank (8), respectively be provided with the T type groove that two installation molds are used at described locked mode platen (2-6) and working plate (2-7);

Described clamping mechanism (3) is installed in the centre of working plate (2-7) Yu the support (2-8) of frame (2), and slide at working plate (2-7) easy on and off, this mechanism includes upper bracket (3-4), and be fixed on by bolt (3-3) on the working plate (2-7) of described frame (2), upper bracket (3-4) is connected by the end of bearing pin (3-14) with long connecting rod (3-7), the other end of long connecting rod (3-7) is connected by bearing pin (3-14) with an end of elbow connecting rod (3-12), the other end of elbow connecting rod (3-12) is connected by bearing pin (3-14) with undersetting (3-15), undersetting (3-15) is fixed on the described support (2-8) by bolt (3-3), on frame (2-8), be fixed with an end of the guide rod (3-13) that extends through sliding support (3-16), the other end of guide rod (3-13) is fixing by hex nut (3-8) by backing-out punch base plate (3-6), backing-out punch seat (3-5) is fixed on the backing-out punch base plate (3-6) by hexagon socket cap head screw (3-9), backing-out punch nut (3-2) is screwed in and inserts ejecting on the screw rod (3-1) in the backing-out punch seat (3-5), be connected with an end of short connecting rod (3-11) with sliding support (3-16) by bearing pin (3-10), the other end of short connecting rod (3-11) and elbow connecting rod (3-12) are connected and fixed by bearing pin (3-10);

Described Mode-locking oil cylinder (4) includes oil cylinder guiding end cap (4-3), cylinder body (4-4), cylinder cover (4-10), be fixed on the support (2-8) of described frame (2) by hex nut (4-9) with stud (4-5), by round nut (4-6) piston (4-7) in the Mode-locking oil cylinder (2) and piston rod (4-1) locking are connected as a single entity, on the cylinder cover (4-10) of Mode-locking oil cylinder (4), are provided with trimmer valve;

Described pull and stretch oil cylinder (1) extends through cylinder cover (1-3) by stud (1-2) and is fixed on the described pull and stretch oil cylinder platen (2-3) by hex nut (1-1); pull and stretch oil cylinder (1) includes the piston (1-5) by the fixedly connected one of round nut (1-4); hollow shaft-like piston rod (1-6) and cylinder body (1-10); piston (1-5) and piston rod (1-6) are at cylinder body (1-10) and be located in the guiding end cap (1-13) of cylinder body (1-10) bottom and slide up and down; the pull and stretch oil cylinder has guiding mechanism and punch mechanism is installed; by screw (1-28) pull and stretch screw rod (1-11) is fixedly mounted in the piston rod (1-6); insert dress mould screw rod (1-27) is arranged in pull and stretch screw rod (1-11) stomidium; dress mould screw rod (1-27) end has screw thread; other end polished rod part; the polished rod position that described installation punch mechanism is included in dress mould screw rod (1-27) is established and is crossed elongated slot; there is 5 °～15 ° inclined-plane its end; insert in pull and stretch screw rod (1-11) stomidium by dress mould screw rod (1-27); on pull and stretch screw rod (1-11), be provided with pressing plate (1-22); tapered wedges (1-24) in bolt (1-25) passes pressing plate (1-22) and places the horizontal wedge anchorage seat (1-26) of adorning mould screw rod (1-27) afterbody is connected; tapered wedges (1-24) end has 5 °～15 ° inclined-plane; the threaded end of dress mould screw rod (1-27) is connected with pull and stretch punch (9-1); screw bolt (1-25); tapered wedges (1-24) is strained; under the ramp effect of tapered wedges (1-24); promote dress mould screw rod (1-27) and up carry, pull and stretch punch (9-1) end face and pull and stretch screw rod (1-11) end face are fixed together tightly.

Described hydraulic system (7) includes fuel tank (8), hydraulic pump (7-5), motor, shaft coupling and is fixed on hydraulic manifold block (7-4) on the described support (2-8), electro-hydraulic reversing valve (7-1), check valve (7-3) and overflow valve (7-2) to be formed, on described motor, be fixed with the hydraulic pump (7-5) that is connected with pump seat, rotate by described shaft coupling, install and fix electro-hydraulic reversing valve (7-1), check valve (7-3), overflow valve (7-2) on described hydraulic manifold block (7-4), hydraulic manifold block (7-4) is provided with into and out of hydraulic fluid port and overfall.

2, numerical control hydraulic pull and stretch machine according to claim 1 is characterized in that: be provided with axle and seal with combination seal (4-8) with combination seal (4-2) and hole in described Mode-locking oil cylinder (4).

3, numerical control hydraulic pull and stretch machine according to claim 1, it is characterized in that: the guiding mechanism of described pull and stretch screw rod (1-11) includes the gathering sill that is located on pull and stretch screw rod (1-11) screw thread, work is straight-line up and down in gathering sill is fixed on feather key (1-15) in the fairlead (1-18) by screw (1-14), one end of pull and stretch screw rod (1-11) is connected with by the fixing guided bearing circle (1-9) of circlip for shaft (1-7), be installed on the pull and stretch screw rod (1-11) by adjusting nut (1-19) and locking nut (1-20), and the length that fixes and regulate pull and stretch screw rod (1-11) by piston rod nut (1-17), on pull and stretch oil cylinder platen (2-3), have by the fixing guide and limit bar (1-23) of bolt (1-21), the other end at piston rod (1-6) has by the fixing guide collar (1-16) of bolt (1-29), makes guide collar (1-16) moving linearly up and down in guide and limit bar (1-23).

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