CN208004751U - A kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot - Google Patents

Abstract

The utility model is related to a kind of devices for being rotatably inserted into core base and preparing large-scale compound steel ingot, including ingot mould, cap mouth, elevating mechanism, swing mechanism, core base rotary lifting mechanism and protective atmosphere cover；Cap mouth is set at the top of the ingot mould, elevating mechanism is set to ingot mould side, is liftably equipped with swing mechanism thereon；The overhanging end of swing mechanism sets chuck, and protective atmosphere cover is clamped to the lower section of swing mechanism overhanging end by chuck；Core base rotary lifting mechanism is made of motor, transmission mechanism and bull stick, and transmission mechanism is driven by motor, is worm drive between bull stick and transmission mechanism；The top center of protective atmosphere cover sets through-hole and is passed through for bull stick, and under transmission mechanism drive, bull stick can be used for fixed core base in lifting moving, the bottom end of bull stick while rotating；Using device described in the utility model, after molten steel injects ingot mould, it is rotatably inserted into molten steel after metal core base is preheated, interior tissue fine, super uniform, super fine and close various large-scale steel ingots can be obtained.

Description

A kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot

Technical field

It being rotatably inserted into core base the utility model is related to cast metals production technical field more particularly to one kind and preparing large size again Close the device of steel ingot.

Background technology

Currently, molding is still to produce a kind of important method of steel ingot, especially when producing small lot big cross section steel ingot, With irreplaceable role, the compression ratio of finished product can be improved, obtains the more fine and closely woven uniform product of interior tissue.However, With the increase of ingot shape size, setting rate declines rapidly, thus brings a series of quality problems, and such as segregation aggravates, is loose And shrinkage cavity increase, non-metallic inclusion increase, column crystal is flourishing, equiax crystal is coarse etc., lead to the internal soundness of steel ingot significantly Decline.

In order to improve the internal soundness of static ingot, according to the Solidification Characteristics of steel ingot, it is developed a variety of raising steel ingots The method of internal soundness：

Patent document CN103212674 and CN201157895 disclose a kind of cold in cast base and side wall water flowing pressure But the technology of ingot casting can produce the steel ingot of substance bigger by this mold pressure cooling technology, but this method is only suitable for Medium and small ingot shape, when steel ingot size increases, water cooling ingot mould decrease with obvious effects.

Patent document CN200910010862 discloses a kind of method of more ladle combined casting inhibition macrotype ingot aliquations, this method It is poured into a mould using multiple casting ladle echelons, the carbon content of molten steel is continuously decreased according to the rule of segregation in different casting ladles, different casting ladles Duration of pouring interval gradually increases, and alleviates the segregation of large-scale steel ingot to a certain extent, but this method is in control steel ingot crystal grain Effect is little in terms of degree and loose shrinkage cavity, and process parameter control difficulty is big.

Patent document CN101927336 discloses a kind of using continuous casting billet as crystallizer die cavity progress composite casting extra-thick plate blank Method, this extra-thick plate blank forms crystallizer by 2 pieces or 2 pieces or more of continuous casting billet, and the solidification of pour steel therebetween is compound It forms, distinct disadvantage existing for this method is that the interface between slab and solidified structure is easy oxidation, detaches, and leads to compound mistake Effect.

Patent document CN101406937 and CN101279359 disclose a kind of installation of the heart in the mould low temperature plug production The manufacturing method of low-aliquation large-scale hollow steel ingot, this method by arranging a circle or a few circle low temperature rod irons in advance in steel ingot cavity Increase steel ingot cooled and solidified speed, obtains the low-segregation large-sized steel ingot that comparison of ingredients is uniform, tissue is relatively fine.But in this method Bar and ingot weight ratio need to control within the scope of 0.8%~3%, and cooling effect is bad, and bar preheating temperature is relatively low When, molten steel is also easy to produce hole with bar combination interface.

Patent document 201510835843.8,201510138188.0,201410742466.9 and 2014104875430 is all Disclose a kind of method that steel core is set in mold and carries out composite casting large size alloy steel ingot, due to before pouring into a mould in mold it is pre- The steel core of one or more low temperature is set, therefore the cooling of melt can be strengthened inside melt, to improve the setting rate of melt, Refine as cast condition interior tissue.It is quiet when steel core preheating temperature is not high since steel core surface adsorbs bulk gas but in these methods It is only motionless, when molten steel is around its solidification, the defects of interface between molten steel and steel core can form stomata, slag inclusion, therefore be easy to make At compound interface mass defect.In addition, in mold when cloth, technological operation is comparatively laborious, and the molten steel for injecting ingot mould is also easy Steel core is washed upside down, composite quality is influenced.

Patent document 201710545204.7 discloses a kind of method that two-way cooling dynamic pours into a mould composite ingot, this method The core base of the preset rotation in ingot mould while realizing inside and outside while cooling melt, eliminates lacking between core base and molten steel It falls into, but still there are technological operation inconvenience, the problems such as hollow core base cannot be prepared.

Invention content

The utility model provides a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot, injects ingot mould in molten steel Afterwards, molten steel will be rotatably inserted into after the preheating of metal core base, can obtain interior tissue fine, it is super it is uniform, it is super it is fine and close it is various greatly Shaped steel ingot.

In order to achieve the above object, the utility model is realized using following technical scheme：

A kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot, including ingot mould, cap mouth, elevating mechanism, oscillating machine Structure, core base rotary lifting mechanism and protective atmosphere cover；Cap mouth is set at the top of the ingot mould, elevating mechanism is set to ingot mould side, thereon Liftably it is equipped with swing mechanism；The overhanging end of swing mechanism sets chuck, and protective atmosphere cover is clamped to oscillating machine by chuck The lower section of structure overhanging end；Core base rotary lifting mechanism is made of motor, transmission mechanism and bull stick, and transmission mechanism is driven by motor, It is worm drive between bull stick and transmission mechanism；The top center of protective atmosphere cover sets through-hole and is passed through for bull stick, in transmission mechanism Under drive, bull stick can be used for fixed core base in lifting moving, the bottom end of bull stick while rotating；In the drive of swing mechanism Under, protective atmosphere cover and core base rotary lifting mechanism can move integrally the surface of ingot mould；In core base rotary lifting mechanism Drive under, bull stick can drive core base while rotation while rise or fall；The outside of protective atmosphere cover is equipped with induction heating apparatus, The side of protective atmosphere cover is equipped with admission line for being connect with outer protection gas transmission pipeline.

The elevating mechanism is made of column, screw rod and slide, and column and screw rod are vertically arranged, and slide is sheathed on column With on screw rod, slide is lifted with screw rod cooperation, and column play the guiding role.

It is additionally provided with chassis, the ingot mould and elevating mechanism are set on chassis, and the column wherein in elevating mechanism passes through spiral shell Bolt is fixedly connected with chassis.

The swing mechanism is made of oscillating table and axis pin, and oscillating table is hinged by the slide in axis pin and elevating mechanism, And it can horizontally rotate around hinge joint.

Compared with prior art, the utility model has the beneficial effects that：

(1) the utility model uses stocking or forging material as core base to be composite, after molten steel injects ingot mould, from mold Core base after preheating is rotatably inserted into inside molten steel by top, and operation is simple and reliable, and technology controlling and process is easy, be suitble to upper note, bet with And the various steel ingots of vacuum pouring；

(2) it is inserted into the core base of rotation into molten steel, can make to generate mutual fricting shearing between core base and molten steel, to remove The gentle body of micro amount of oxygen compound on core base surface makes core base surface expose clean metal, convenient for having been formed between core base and molten steel Full metallurgical binding eliminates the boundary defect between core base and solidified structure；

(3), can be with action of forced stirring molten steel flow when core base rotates, and then dendrite coarse in melt is cut, increase forming core Rate, thinning microstructure；

(4) the defects of stirring molten steel using the core base of rotation, dendrite can be prevented to overlap, mitigate loose and shrinkage cavity, makes molten Matter is more evenly distributed, and mitigates various segregation defects；

(5) it is inserted into the lower core base of relative temperature into molten steel, acceleration cooling can be carried out to molten steel from inside, improve molten steel Degree of supercooling, improve nucleation rate, thinning microstructure；

(6) core base is preheated under protective atmosphere, core base can be preheating to higher temperatures in the case that core base surface is non-oxidizing Degree, improves the quality of compound interface；

It (7) can be by adjusting the temperature inside the parameter adjustments metal baths such as the quantity, size, preheating temperature of core base , the reasonable control to process of setting is realized, to the high-quality large-scale steel ingot of any shape of casting out, size and weight；

(8) large hollow ingot casting can be prepared after solid core base being replaced with hollow core base, is used as the blank of annular forging piece, it will The core base of same material is replaced with the core base of unlike material, can prepare the hollow or solid composite ingot casting of unlike material, uses In making dual-metal clad steel pipe or bimetal composite rod wire rod.

Description of the drawings

Fig. 1 is that a kind of use state being rotatably inserted into the device that core base prepares large-scale compound steel ingot described in the utility model is shown It is intended to one (core base warm, core base are solid core base).

Fig. 2 is that a kind of use state being rotatably inserted into the device that core base prepares large-scale compound steel ingot described in the utility model is shown It is intended to two (core base is inserted into molten steel process, and core base is solid core base).

Fig. 3 is that a kind of use state being rotatably inserted into the device that core base prepares large-scale compound steel ingot described in the utility model is shown It is intended to two (core base is inserted into molten steel process, and core base is hollow core base).

Fig. 4 is a kind of vertical view for being rotatably inserted into core base and preparing the device of large-scale compound steel ingot described in the utility model.

In figure：1. 9. bull stick of chassis 2. bolt, 3. column, 4. screw rod, 5. slide, 6. axis pin, 7. oscillating table, 8. motor 10. 15. induction heating apparatus of transmission mechanism 11. chuck, 12. admission line, 13. core base, 14. protective atmosphere cover, 16. cap mouth 17. 18. molten steel of ingot mould

Specific implementation mode

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：

As Figure 1-Figure 4, a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot described in the utility model, packet Include ingot mould 17, cap mouth 16, elevating mechanism, swing mechanism, core base rotary lifting mechanism and protective atmosphere cover 14；The ingot mould 17 pushes up Portion sets cap mouth 16, and elevating mechanism is set to 17 side of ingot mould, is liftably equipped with swing mechanism thereon；The overhanging end of swing mechanism is set Chuck 11, protective atmosphere cover 14 are clamped to the lower section of swing mechanism overhanging end by chuck 11；Core base rotary lifting mechanism by Motor 8, transmission mechanism 10 and bull stick 9 form, and transmission mechanism 10 is driven by motor 8, are spiral between bull stick 9 and transmission mechanism 10 Transmission；The top center of protective atmosphere cover 14 sets through-hole and is passed through for bull stick 9, and under the drive of transmission mechanism 10, bull stick 9 can revolve The bottom end of lifting moving while turning, bull stick 9 is used for fixed core base 13；Under the drive of swing mechanism, protective atmosphere cover 14 and Core base rotary lifting mechanism can move integrally the surface of ingot mould 17；Under the drive of core base rotary lifting mechanism, bull stick 9 Core base 13 can be driven to be risen or fallen in rotation；The outside of protective atmosphere cover 14 is equipped with induction heating apparatus 15, protects gas The side of atmosphere cover 14 is equipped with admission line 12 for being connect with outer protection gas transmission pipeline.

The elevating mechanism is made of column 3, screw rod 4 and slide 5, and column 3 and screw rod 4 are vertically arranged, and slide 5 is arranged In on column 3 and screw rod 4, slide 5 is lifted with the cooperation of screw rod 4, and column 3 play the guiding role.

It is additionally provided with chassis 1, the ingot mould 17 and elevating mechanism are set on chassis 1, and the column 3 wherein in elevating mechanism is logical Bolt 2 is crossed to be fixedly connected with chassis 1.

The swing mechanism is made of oscillating table 7 and axis pin 6, and oscillating table 8 passes through the slide 5 in axis pin 6 and elevating mechanism It is hinged, and can horizontally rotate around hinge joint.

The method for being rotatably inserted into core base and preparing large-scale compound steel ingot based on device described in the utility model, including following step Suddenly：

A. prepare raw material：Steel billet to roll or forge adds 13 head of core base and tail portion as core base 13 to be composite Work is tapered, and tail portion connects a bull stick 9；The iron scale for going to 13 surface of decoring base is dried after cleaning up；

B. installation core base 13：Downward by head one end of core base 13,9 one end of bull stick upward, passes through protective atmosphere cover 14 solid It is scheduled on transmission device, transmission device is set to 17 side of ingot mould, by elevating mechanism, swing mechanism and core base rotary lifting mechanism group At wherein elevating mechanism is for driving core base 13 and 14 integral elevating of protective atmosphere cover to move, and swing mechanism is for driving core base 13 and the rotation of 14 integral level of protective atmosphere cover, core base rotary lifting mechanism be used to drive 13 rotation and lifting of core base by bull stick 9； Start hoisting mechanism, core base 13 and protective atmosphere cover 14 is driven to move upwardly together, when the bottom end of protective atmosphere cover 14 is higher than ingot Stop behind 16 top of cap mouth on mould 17；

C. molten steel is poured into a mould：It will be in molten steel injection ingot mould 17 melted in advance；

D. preheating core base 13：As shown in Figure 1, core base 13 and protective atmosphere cover 14 are rotated to ingot mould 17 by swing mechanism Surface, be filled with inert gas into protective atmosphere cover 14, while starting the sensing heating for being set to 14 outside of protective atmosphere cover Device 15 preheats core base 13, and preheating temperature is 100 DEG C~1200 DEG C；

E. it is rotatably inserted into core base 13：It drives core base 13 and protective atmosphere cover 14 to move downward by lifting gear, works as protection 14 lower end of atmosphere cover stops declining when touching the covering slag on 18 surface of molten steel；Made under core base 13 using core base rotary lifting mechanism Drop, core base 13 is rotatably inserted into molten steel 18 while decline；Core base 13 decline during by lifting gear by protective atmosphere cover 14 rise；Stop declining (as shown in Figure 2) after core base 13 is fully inserted into molten steel 18, stop again after the time for reaching process stipulation Rotation, until molten steel 18 obtains clad steel ingot after solidifying；Remove bull stick 9, drives protective atmosphere cover 14 from ingot by rotating mechanism 17 top of mould is removed, and initial position is returned to.

The material of the core base 13 and molten steel 18 is identical or different, and core base 13 is solid core base or hollow core base；When core base 13 with molten steel 18 be material of the same race, and core base 13 be solid core base when, prepared steel ingot be material of the same race solid composite steel Ingot；When core base 13 and molten steel 18 are material of the same race, and core base 13 is hollow core base, prepared steel ingot is the sky of material of the same race The compound steel ingot of the heart；When core base 13 and molten steel 18 are unlike material, and core base 13 is hollow core base, prepared steel ingot is xenogenesis The bimetallic Hollow Compound steel ingot of material；It is made when core base 13 and molten steel 18 are unlike material, and core base 13 is solid core base Standby steel ingot is the bimetallic solid composite steel ingot of heterogeneous material.

The iron scale on 13 surface of decoring base is removed using pickling, machining or blasting method.

Following embodiment is implemented under premised on technical solutions of the utility model, gives detailed embodiment With specific operating process, but the scope of protection of the utility model is not limited to following embodiments.Side used in following embodiments Method is conventional method unless otherwise instructed.

【Embodiment 1】

In the present embodiment, after pouring into a mould molten steel into ingot mould from top, it is rotatably inserted into solid core base, it is 85 tons to prepare weight Q345 alloy steel ingots for.

Specific preparation process is as follows：

It selects the Q345 alloyed steel round billet 1 forged as core base 13 to be composite, the middle section of core base 13 is added Work is at the cylinder of 760 × 1800mm of φ, and the cone that head processing tapering is 90 °, tail portion is processed into tapering transition Section 320 × 1200mm of φ cylinder, core base tail portion weld 1 bull stick 9, then by manufactured 13 surface degreasing of core base, De-scaling, cleaning, drying.

Downward by the head of core base 13,9 one end of bull stick upward, is fixed on across protective atmosphere cover 14 on transmission mechanism 10, Then screw rod 4 is rotated, slide 5 is promoted, drives core base 13 and protective atmosphere cover 14 to move up, when the bottom end of protective atmosphere cover 14 Stop behind the top for being highly more than cap mouth 16.

As shown in Figure 1, Q345 molten steel 18 melted in advance is injected in ingot mould 17；Oscillating table 7 is rotated, by 13 He of core base Protective atmosphere cover 14 rotates to the top of ingot mould 17, is filled with inert gas into protective atmosphere cover 14 by admission line 12, together Shi Qidong induction heating apparatuses 15 preheat core base 13, and preheating temperature is 600 DEG C.Screw rod 4 is rotated backward, is moved down Slide 5 drives core base 13 and protective atmosphere cover 14 to move down, when the bottom end of protective atmosphere cover 14 touches 18 surface of molten steel When covering slag, stop declining slide 5.

Motor 8 is started, core base 13 is rotated and declined using transmission mechanism 10, core base 13 is rotating and is inserted into molten steel 18, Slide 5 is gradually promoted during this, is stopped declining (as shown in Figure 2) after core base 13 is fully inserted into molten steel 18, is reached Process Planning It stops rotating after the fixed time, until molten steel 18 removes bull stick 9 after solidifying, oscillating table 7 is turned round again, leave 17 top of ingot mould, i.e., The solid composite steel ingot of available 85 tons heavy of material of the same race.

【Embodiment 2】

In the present embodiment, after vacuum pouring molten steel, it is rotatably inserted into hollow core base, it is empty to prepare the 16MnR that weight is 120 tons For heart alloy steel ingot.

Specific preparation process is as follows：

The hollow steel cylinder of welding is selected to make hollow core base 13, the material of core base 13 is 16MnR, and the stack shell part of core base 13 is done At the cylinder type hollow steel cylinder of 1000/ 600 × 2000mm of φ of φ, head uses taper close for 120 ° of conical bloom welding Envelope, tail portion use thickness to be welded for the circular steel plate of 100mm, and in piece bull stick 9 of steel plate center weld, then by manufactured core 13 surface degreasing of base, de-scaling, cleaning, drying.

Downward by the head of core base 13,9 one end of bull stick is fixed on across protective atmosphere cover 14 on transmission mechanism 10 upward, so Rotation screw rod 4 (driving of manually or electrically device) afterwards promotes slide 5, drive core base 13 and protective atmosphere cover 14 to moving up It is dynamic, stop after the height of 14 bottom end of protective atmosphere cover is more than the top of cap mouth 16.

By in 110 tons of 16MnR molten steel 18 injection ingot mould 17 melted in advance, the head cover of vacuum pouring room is opened；Rotation Core base 13 and protective atmosphere cover 14 are rotated to the top of ingot mould 17 by oscillating table 7, by admission line 12 to protective atmosphere cover 14 It is inside filled with inert gas, while starting induction heating apparatus 15 and core base 13 is preheated, core base 13 is preheating to 720 DEG C.Instead To rotation screw rod 4, slide 5 is moved down, drives core base 13 and protective atmosphere cover 14 to move down, when the bottom of protective atmosphere cover 14 When termination contacts the covering slag on 18 surface of molten steel, stop declining slide 5.

Motor 8 is started, core base 13 is rotated and declined using transmission mechanism 10, core base 13 is rotating and is inserted into molten steel 18, Slide 5 is gradually promoted during this, is stopped declining (as shown in Figure 3) after core base 13 is fully inserted into molten steel 18, is reached Process Planning Stop rotating again after the fixed time, until molten steel 18 removes bull stick 9 after solidifying, oscillating table 7 turns round, leave 17 top of ingot mould to get To the Hollow Compound steel ingot of 120 tons heavy of material of the same race.

【Embodiment 3】

In the present embodiment, after pouring into a mould molten steel into ingot mould in a manner of betting, it is rotatably inserted into the core base of unlike material, prepares weight For amount is 24 tons of 16MnR/SUS304 stainless steel composite ingot.

Specific preparation process is as follows, selects the SUS304 stainless steel bars that internal diameter is 450 × 1600mm of φ as core base 13, core 120 ° of cone is processed on the head of base 13, then center weld piece bull stick 9 in tail portion removes manufactured 13 surface of core base Oil, de-scaling, cleaning, drying.

Downward by the head of core base 13, bull stick one end 9 upward, is fixed on across protective atmosphere cover 14 on transmission mechanism 10, Then screw rod 4 is rotated, slide 5 is promoted, drives core base 13 and protective atmosphere cover 14 to move upwards, when 14 bottom end of protective atmosphere cover Stop behind the top for being highly more than cap mouth 16.

It will be in 22.5 tons of 16MnR molten steel 18 injection ingot mould 17 melted in advance using bet method；Oscillating table 7 is rotated, it will Core base 13 and protective atmosphere cover 14 rotate to the top of ingot mould 17, and inertia is filled with into protective atmosphere cover 14 by admission line 12 Gas, while starting induction heating apparatus 15, core base 13 is preheated, core base 13 is preheating to 450 DEG C；Rotate backward screw rod 4, slide 5 is moved down, drives core base 13 and protective atmosphere cover 14 to move downward, when the bottom end of protective atmosphere cover 14 touches steel When the covering slag on 18 surface of liquid, stop declining slide 5.

Motor 8 is started, core base 13 is rotated and declined using transmission mechanism 10, core base 13 is rotating and is inserted into molten steel 18, Slide 5 is gradually promoted during this, is stopped declining (as shown in Figure 3) after core base 13 is fully inserted into molten steel 18, is reached Process Planning Stop rotating again after the fixed time, until molten steel 18 removes bull stick 9 after solidifying, oscillating table 7 turns round, leave 17 top of ingot mould to get To height be 1555mm, the composite ingot that quality is 24.5 tons, cut head-tail and get quality for 24 tons of 16MnR/ SUS304 stainless steel Hollow Compound steel ingots.

Above-mentioned specific embodiment shows that interface can be prepared at low cost in metallurgy using device described in the utility model In conjunction with the compound steel ingot of large size, device described in the utility model has easy to operate, and technical process is easy to control, be suitble to upper note, Bet and the various compound steel ingots of vacuum pouring, production cost is low, and solid liquid interface bond quality is good, steel ingot dense internal organization, Finished product rate is high, shape of ingots, the features such as dimensions and kind are varied.

The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (4)

1. a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot, which is characterized in that including ingot mould, cap mouth, elevator Structure, swing mechanism, core base rotary lifting mechanism and protective atmosphere cover；Cap mouth is set at the top of the ingot mould, elevating mechanism is set to ingot mould Side is liftably equipped with swing mechanism thereon；The overhanging end of swing mechanism sets chuck, and protective atmosphere cover is gripped by chuck In the lower section of swing mechanism overhanging end；Core base rotary lifting mechanism is made of motor, transmission mechanism and bull stick, and transmission mechanism is by electricity Machine drives, and is worm drive between bull stick and transmission mechanism；The top center of protective atmosphere cover sets through-hole and is passed through for bull stick, is passing Under motivation structure drives, bull stick can be used for fixed core base in lifting moving, the bottom end of bull stick while rotating；In swing mechanism Under drive, protective atmosphere cover and core base rotary lifting mechanism can move integrally the surface of ingot mould；In core base rotation and lifting Under the drive of mechanism, bull stick can drive core base to be risen or fallen in rotation；The outside of protective atmosphere cover is equipped with sensing heating The side of device, protective atmosphere cover is equipped with admission line for being connect with outer protection gas transmission pipeline.

2. a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot according to claim 1, which is characterized in that institute Elevating mechanism to be stated to be made of column, screw rod and slide, column and screw rod are vertically arranged, and slide is sheathed on column and screw rod, Slide is lifted with screw rod cooperation, and column play the guiding role.

3. a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot according to claim 1, which is characterized in that also Equipped with chassis, the ingot mould and elevating mechanism are set on chassis, and the column wherein in elevating mechanism is solid by bolt and chassis Fixed connection.

4. a kind of device for being rotatably inserted into core base and preparing large-scale compound steel ingot according to claim 1, which is characterized in that institute It states swing mechanism to be made of oscillating table and axis pin, oscillating table is hinged by the slide in axis pin and elevating mechanism, and can be around hinged Point horizontally rotates.