CN213730225U

CN213730225U - Positioning extrusion device

Info

Publication number: CN213730225U
Application number: CN202022779334.7U
Authority: CN
Inventors: 周成刚; 鞠传军; 杨亚鹏; 宫荣成; 刘钊
Original assignee: Weihai Guangtai Airport Equipment Co Ltd
Current assignee: Weihai Guangtai Airport Equipment Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-20
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a boarding bridge passageway installation technical field specifically indicates a location extrusion device, which comprises a column, stand upper portion one side is equipped with the tight mechanism in side top, the tight mechanism in side top includes the mount pad, adjust the lead screw, sliding support, the screw seat, the boss, a bearing, the tight hydraulic cylinder in side top and side supporting seat, be equipped with the mount pad on the stand, sliding support and mount pad sliding connection, be equipped with the screw seat on the sliding support, the sliding support is improved level and is equipped with the tight hydraulic cylinder in side top, the stand lower extreme is equipped with the tight mechanism in bottom top, the stand lower extreme is equipped with the piston rod perforation, the tight mechanism in bottom top includes the tight hydraulic cylinder in bottom top, the hydraulic cylinder supporting seat, bottom guide rail support and top tight piece, the stand upper end is equipped with top pushing down the mechanism, top pushing down the mechanism including slewing bearing, fixed sliding sleeve, sliding support and top pushing down the hydraulic cylinder, the utility model discloses a location extrusion device suitable for the passageway class work piece of different dimensions, The welding precision is high, and the welding deflection is controllable.

Description

Positioning extrusion device

Technical Field

The utility model relates to a boarding bridge passageway installation technical field specifically indicates a location extrusion device.

Background

The passenger boarding bridge is a movable lifting channel used for connecting a waiting hall and an airplane in an airport, one end of the passenger boarding bridge is connected with a certain boarding port of the waiting building, the other end of the passenger boarding bridge is connected with a cabin door of the airplane, passengers enter the airplane through the corresponding boarding port through the channel, the distance between the waiting building and the airplane is shortened, and the passengers are prevented from being exposed to the sun and rain, so that the passengers can board conveniently, and the passenger boarding mode gradually becomes the mainstream boarding mode.

Disclosure of Invention

The utility model aims at solving the prior art not enough, provide a novel structure, be suitable for the location extrusion of passageway class work piece of different dimensions, welding convenience, work efficiency height, welding precision height, the controllable location extrusion device of welding deformation.

In order to achieve the above object, the utility model adopts the following technical scheme:

a positioning extrusion device is characterized in that: the vertical column comprises a vertical column, wherein a mounting hole is formed in the lower end of the vertical column, a side edge jacking mechanism is arranged on one side of the upper portion of the vertical column and comprises a mounting seat, an adjusting screw rod, a sliding support, a nut seat, a boss, a bearing, a side surface jacking hydraulic cylinder and a side surface supporting seat, the mounting seat is arranged on the vertical column, the adjusting screw rod is arranged on one side of the vertical column and fixedly connected with the vertical column, a longitudinal guide rail is fixedly arranged on the mounting seat, the sliding support is arranged on the mounting seat and is in sliding connection with the mounting seat, the nut seat is arranged on the sliding support and is fixedly connected with the sliding support, the boss is arranged above the nut seat and is fixedly connected with the mounting seat, one end of the adjusting screw rod is connected with the boss through the bearing, and the other end of the adjusting screw rod penetrates through the nut seat and is in threaded connection with the nut seat so as to be beneficial to adjusting the screw rod through rotation, the driving screw base reciprocates, and then drives the sliding support and reciprocates, the sliding support is improved level and is equipped with the tight hydraulic cylinder in side top, the last fixed side supporting seat that is equipped with of sliding support, the tight hydraulic cylinder in side top and side supporting seat fixed connection, the piston rod that the tight hydraulic cylinder in side top forms the free extrusion end to do benefit to and fix a position the side of extruding the work piece through the piston rod that the tight hydraulic cylinder in side top.

The lower end of the upright post of the utility model is provided with a bottom tightening mechanism, the lower end of the upright post is provided with a piston rod perforation, the bottom tightening mechanism comprises a bottom tightening hydraulic cylinder, a hydraulic cylinder supporting seat, a bottom guide rail supporting seat and a tightening block, one side of the upright post is provided with a hydraulic cylinder supporting seat, the other side of the upright post is provided with a bottom guide rail support, the hydraulic cylinder supporting seat and the bottom guide rail support are respectively provided with a mounting hole, the bottom pressing hydraulic cylinder is arranged on the hydraulic cylinder supporting seat and is fixedly connected with the hydraulic cylinder supporting seat, a piston rod of the bottom pressing hydraulic cylinder penetrates through a piston rod through hole of the upright post and is fixedly connected with the pressing block, the lower end of the puller block is arranged on a bottom guide rail support, a guide rail is arranged on the bottom guide rail support, the puller block is connected with the bottom guide rail support in a sliding way, the bottom jacking hydraulic cylinder is facilitated to drive the jacking block to move through the piston rod, and the bottom jacking hydraulic cylinder is used for positioning and extruding the bottom of the workpiece.

Stand upper end is equipped with top and pushes down the mechanism, top pushes down the mechanism and includes that slewing bearing, fixed sliding sleeve, sliding support and top push down the hydraulic cylinder, the stand upper end is equipped with fixed sliding sleeve, fixed sliding sleeve lower extreme is connected with the stand through slewing bearing, transversely be equipped with the sliding sleeve in the fixed sliding sleeve, sliding sleeve and fixed sliding sleeve sliding connection, transversely be equipped with sliding support in the sliding sleeve, sliding support and sliding sleeve sliding connection, sliding support one side is equipped with the top and pushes down the hydraulic cylinder, the hydraulic cylinder seat and the sliding support fixed connection of hydraulic cylinder are pushed down at the top, the piston rod that the hydraulic cylinder was pushed down at the top downwards forms the free end of pushing down to do benefit to and push down the top of work piece through the hydraulic cylinder drive piston rod is flexible downwards to push down at the top.

The top pushes down the hydraulic cylinder lower extreme and is equipped with and pushes down guiding mechanism, it includes the hydraulic extension board, pushes down guide block, slide bearing and pushes down the compact axle to push down guiding mechanism, the fixed hydraulic extension board that is equipped with in sliding support one side interval and pushes down the guide block, hydraulic cylinder and hydraulic extension board fixed connection are pushed down at the top, push down the compact axle upper end and pass and push down the piston rod lower extreme fixed connection of guide block and top push down the hydraulic cylinder, push down the compact axle and be connected with pushing down the guide block through slide bearing, the lower extreme of pushing down the compact axle forms the free end of pushing down to do benefit to and lead for pushing down the compact axle through pushing down the wire piece, push down the piston rod of hydraulic cylinder through the top simultaneously and drive and push down the compact axle and reciprocate and realize compressing tightly the top of work piece.

Be equipped with side guiding mechanism on the sliding support, side guiding mechanism includes side guide block, slide bearing and side compact axle, be equipped with the side guide block on the sliding support, side guide block and sliding support fixed connection, side guide block and side supporting seat interval parallel arrangement, be equipped with slide bearing in the middle of the side guide block, the piston rod fixed connection of the tight hydro-cylinder in side compact axle one end and side top, the other end pass side guide block and form the free end of extrusion, the side compact axle is through slide bearing and side guide block sliding connection to do benefit to and support and leading side compact axle through the guide block.

The locking mechanism is respectively arranged on the fixed sliding sleeve and the sliding sleeve, the locking mechanism comprises a knob, a screw rod and a baffle, the outside of the fixed sliding sleeve is provided with the knob, the baffle is arranged between the inner wall of the fixed sliding sleeve and the outer wall of the sliding sleeve, the outside of one end of the sliding sleeve is provided with the knob, the baffle is arranged between the inner wall of the sliding sleeve and the outer wall of the sliding support, one end of the screw rod is fixedly connected with the knob, the other end of the screw rod passes through the fixed sliding sleeve or the sliding sleeve and is fixedly connected with the baffle, the screw rod is in threaded connection with the fixed sliding sleeve or the sliding sleeve, so that when the sliding sleeve is moved to a proper position, the knob is rotated to ensure that the gasket is pressed on the outer wall of the sliding sleeve to fix the position of the sliding sleeve, when the sliding support is moved to a proper position, the knob is rotated to ensure that the gasket is pressed on the outer wall of the sliding support to fix the position of the sliding support, thereby fixing the position of the top pressing hydraulic cylinder.

Sliding sleeve left end outer wall and right-hand member outer wall are equipped with the stopper respectively, sliding support left end outer wall and right-hand member outer wall are equipped with the stopper respectively, stopper and sliding sleeve or sliding support fixed connection to do benefit to the stroke that removes about through stopper spacing sliding sleeve and sliding support, prevent sliding sleeve roll-off fixed sliding sleeve and sliding support roll-off sliding sleeve.

Sliding sleeve outer wall one side and sliding support outer wall one side are equipped with the handle respectively, handle and sliding sleeve or sliding support fixed connection to do benefit to and drive sliding sleeve or sliding support through the pulling handle and remove, and then change the position that the hydraulic cylinder was pushed down at the top.

By adopting the above structure, the utility model, have novel structure, be suitable for the location extrusion of the passageway class work piece of different dimensions, weld advantages such as convenient, work efficiency is high, welding precision is high, welding deformation is controllable.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic view of the middle side tightening mechanism of the present invention.

Fig. 4 is a schematic view of the middle top pressing mechanism of the present invention.

Fig. 5 is a schematic view of the middle bottom tightening mechanism of the present invention.

Fig. 6 is a schematic structural view of the present invention in use.

Reference numerals: the device comprises a bottom pressing mechanism 3, a side pressing mechanism 4, a top pressing mechanism 5, a slewing bearing 17, an upright column 20, a mounting seat 21, an adjusting screw rod 22, a sliding support 23, a screw seat 24, a boss 25, a side pressing hydraulic cylinder 26, a side support 27, a bottom pressing hydraulic cylinder 28, a hydraulic cylinder support 29, a bottom guide rail support 30, a pressing block 31, a fixed sliding sleeve 32, a sliding sleeve 33, a sliding support 34, a top pressing hydraulic cylinder 35, a pressing guide mechanism 36, a hydraulic support plate 37, a pressing guide block 38, a pressing shaft 39, a side guide mechanism 40, a side guide block 41, a side pressing shaft 42, a limiting block 43, a handle 44, a locking mechanism 45 and a knob 46.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

A positioning extrusion device is characterized in that: comprises a stand column 20, the lower end of the stand column 20 is provided with a mounting hole, one side of the upper part of the stand column 20 is provided with a side edge jacking mechanism 4, the side edge jacking mechanism 4 comprises a mounting seat 21, an adjusting screw rod 22, a sliding support 23, a screw seat 24, a boss 25, a bearing, a side surface jacking hydraulic cylinder 26 and a side surface support seat 27, the stand column 20 is provided with the mounting seat 21, one side of the stand column 20 is provided with the adjusting screw rod 22, the mounting seat 21 is fixedly connected with the stand column 20, the mounting seat 21 is fixedly provided with a longitudinal guide rail, the mounting seat 21 is provided with the sliding support 23, the sliding support 23 is in sliding connection with the mounting seat 21, the sliding support 23 is provided with the screw seat 24, the screw seat 24 is fixedly connected with the sliding support 23, the boss 25 is arranged above the screw seat 24, the boss 25 is fixedly connected with the mounting seat 21, one end of the adjusting screw rod 22 is connected with the boss 25 through the bearing, the other end passes screw seat 24 and with screw seat 24 threaded connection to do benefit to through the rotation regulation lead screw, drive the screw seat and reciprocate, and then drive the sliding support and reciprocate, sliding support 23 is improved level and is equipped with the tight hydraulic cylinder in side top 26, the fixed side supporting seat 27 that is equipped with on the sliding support 23, the tight hydraulic cylinder in side top 26 and side supporting seat 27 fixed connection, the piston rod that the tight hydraulic cylinder in side top 26 forms the free end of extruding, comes the side of location extrusion work piece with the piston rod that does benefit to through the tight hydraulic cylinder in side top.

The lower end of the upright post 20 of the utility model is provided with a bottom tightening mechanism 3, the lower end of the upright post 20 is provided with a piston rod perforation, the bottom tightening mechanism 3 comprises a bottom tightening hydraulic cylinder 28, a hydraulic cylinder supporting seat 29, a bottom guide rail supporting seat 30 and a tightening block 31, one side of the upright post 20 is provided with the hydraulic cylinder supporting seat 29, the other side is provided with the bottom guide rail supporting seat 30, the hydraulic cylinder supporting seat 29 and the bottom guide rail supporting seat 30 are respectively provided with a mounting hole, the bottom tightening hydraulic cylinder 28 is arranged on the hydraulic cylinder supporting seat 29 and is fixedly connected with the hydraulic cylinder supporting seat 29, a piston rod of the bottom tightening hydraulic cylinder 28 passes through the piston rod perforation of the upright post 20 and is fixedly connected with the tightening block 31, the lower end of the tightening block 31 is arranged on the bottom guide rail supporting seat 30, a guide rail is arranged on the bottom guide rail supporting seat 30, the tightening block 31 is connected with the bottom guide rail supporting seat 30 in a sliding way, so as to be beneficial to the bottom tightening hydraulic cylinder to drive the tightening block to move through the piston rod, used for positioning and extruding the bottom of the workpiece.

The upper end of the upright post 20 of the utility model is provided with a top pressing mechanism 5, the top pressing mechanism 5 comprises a slewing bearing 17, a fixed sliding sleeve 32, a sliding sleeve 33, a sliding support 34 and a top pressing hydraulic cylinder 35, the upper end of the upright post 20 is provided with a fixed sliding sleeve 32, the lower end of the fixed sliding sleeve 32 is connected with the upright post 20 through a slewing bearing 17, a sliding sleeve 33 is transversely arranged in the fixed sliding sleeve 32, the sliding sleeve 33 is connected with the fixed sliding sleeve 32 in a sliding way, a sliding support 34 is transversely arranged in the sliding sleeve 33, the sliding support 34 is connected with the sliding sleeve 33 in a sliding way, a top pressing hydraulic cylinder 35 is arranged on one side of the sliding support 34, a hydraulic cylinder seat of the top pressing hydraulic cylinder 35 is fixedly connected with the sliding support 34, a piston rod of the top pressing hydraulic cylinder 35 downwards forms a free pressing end, so as to be favorable for driving the piston rod to extend and retract downwards to press down the top of the workpiece through the top pressing hydraulic cylinder.

The top pushes down hydraulic cylinder 35 lower extreme and is equipped with and pushes down guiding mechanism 36, it includes hydraulic extension board 37, pushes down guide block 38, slide bearing and pushes down the compact axle 39 to push down guiding mechanism 36, the fixed hydraulic extension board 37 and the guide block 38 that pushes down that is equipped with in sliding support 34 one side interval, hydraulic cylinder 35 and hydraulic extension board 37 fixed connection are pushed down to the top, the piston rod lower extreme fixed connection who pushes down guide block 38 and top and push down hydraulic cylinder 35 is passed to the compact axle 39 upper end of pushing down, and the compact axle 39 of pushing down is connected with the compact guide block 38 through slide bearing, the lower extreme of pushing down compact axle 39 forms the free end of pushing down to do benefit to and push down the compact axle direction for pushing down through the lead block of pushing down, the piston rod through the hydraulic cylinder is pushed down at the top simultaneously and drives to push down the compact axle and reciprocate and realize compressing tightly the top of work piece.

Be equipped with side guiding mechanism 40 on sliding support 23, side guiding mechanism 40 includes side guide block 41, slide bearing and side hold-down shaft 42, be equipped with side guide block 41 on sliding support 23, side guide block 41 and sliding support 23 fixed connection, side guide block 41 and side supporting seat 27 interval parallel arrangement, be equipped with slide bearing in the middle of the side guide block 41, the piston rod fixed connection of tight hydro-cylinder 26 in side hold-down shaft 42 one end and side top, the other end passes side guide block 41 and forms free extrusion end, side hold-down shaft 42 is through slide bearing and 41 sliding connection of side guide block to do benefit to and support and lead the side hold-down shaft through the guide block.

The locking mechanism 45 is respectively arranged on the fixed sliding sleeve 32 and the sliding sleeve 33, the locking mechanism 45 comprises a knob 46, a screw rod and a baffle, the knob 46 is arranged outside the fixed sliding sleeve 32, the baffle is arranged between the inner wall of the fixed sliding sleeve 32 and the outer wall of the sliding sleeve 33, the knob 46 is arranged outside one end of the sliding sleeve 33, the baffle is arranged between the inner wall of the sliding sleeve 33 and the outer wall of the sliding support 34, one end of the screw rod is fixedly connected with the knob 46, the other end of the screw rod passes through the fixed sliding sleeve 32 or the sliding sleeve 33 and is fixedly connected with the baffle, the screw rod is in threaded connection with the fixed sliding sleeve 32 or the sliding sleeve 33, so that when the sliding sleeve moves to a proper position, the knob is rotated, a gasket is abutted against the outer wall of the sliding sleeve to fix the position of the sliding sleeve, when the sliding support moves to a proper position, the knob is rotated, so that the gasket is abutted against the outer wall of the sliding support to fix the position of the sliding support, thereby fixing the position of the top pressing hydraulic cylinder.

Sliding sleeve 33 left end outer wall and right-hand member outer wall are equipped with stopper 43 respectively, 34 left end outer walls of sliding support and right-hand member outer wall are equipped with stopper 43 respectively, stopper 43 and sliding sleeve 33 or sliding support 34 fixed connection to do benefit to the stroke that removes about through stopper spacing sliding sleeve and sliding support, prevent sliding sleeve roll-off fixed sliding sleeve and sliding support roll-off sliding sleeve.

Sliding sleeve 33 outer wall one side and sliding support 34 outer wall one side are equipped with handle 44 respectively, handle 44 and sliding sleeve 33 or sliding support 34 fixed connection to do benefit to and drive sliding sleeve or sliding support through the pulling handle and remove, and then change the position that the hydraulic cylinder was pushed down at the top.

As shown in the attached drawings 1-6, the utility model can adopt two modes when in use, one mode is to arrange two groups of positioning extrusion mechanisms, a channel workpiece is placed between the two groups of positioning extrusion mechanisms for positioning extrusion, the other mode is to position one side of the channel workpiece through a positioning device, then the positioning extrusion mechanism is placed on the other side of the channel workpiece, the distance between the positioning extrusion mechanisms on the two sides is determined according to the width of the channel workpiece so as to conveniently clamp the channel workpieces with different sizes, and when in use, the positioning extrusion mechanism is arranged on one side of the channel workpiece for explanation,

before use, all mechanisms in the positioning extrusion mechanism are adjusted to reverse limit positions, a fixed sliding sleeve of the top pressing mechanism is rotated through a slewing bearing, so that the top pressing hydraulic cylinder is rotated to one side far away from a channel workpiece, the side pressing hydraulic cylinder and the bottom pressing hydraulic cylinder are both contracted, interference in the subsequent assembly process is prevented,

when the assembly is carried out, firstly, the bottom part of the channel workpiece is positioned and clamped: as shown in attached figures 1, 2, 5 and 6, a bottom part of a channel type workpiece is placed on a bottom guide rail support of a bottom jacking mechanism, a jacking block abuts against the side edge of the bottom part of the channel type workpiece, the bottom guide rail support is fixed on a welding platform through screws and mounting holes after the channel type workpiece is placed stably, a hydraulic cylinder support is fixed on the welding platform through the screws and the mounting holes, and then the jacking block is driven by the bottom jacking hydraulic cylinder to position and extrude the bottom part of the channel type workpiece;

secondly, positioning and clamping the side edge part of the channel workpiece: referring to the attached drawings 1, 2, 3 and 6, the side pressing shaft is abutted against the outer wall of the left part of the channel workpiece, so that the lower end of the upright post is fixed on the welding platform through a screw and a mounting hole, and the side pressing shaft is driven by the driving side jacking hydraulic cylinder to move so as to position and extrude the side edge of the channel workpiece;

and finally, positioning and clamping the top part of the channel workpiece: referring to fig. 1, fig. 2, fig. 4 and fig. 6, the top hydraulic cylinder is rotated to face the top member of the channel-type workpiece through the slewing bearing, and then the top hydraulic cylinder is driven, so that the lower pressing shaft at the lower end of the top hydraulic cylinder 35 abuts against the outer wall of the top member of the channel-type workpiece,

the other side of the channel type workpiece can be also provided with a positioning extrusion device according to the steps, one group of positioning and the other group of extrusion can be carried out, or the other side of the channel type workpiece is provided with a positioning mechanism, for example, the right side of the bottom part of the channel type workpiece, the right side part of the channel type workpiece and the right end of the top part of the channel type workpiece are positioned through the positioning mechanism, then the left side of the channel type workpiece is provided with the positioning extrusion mechanism, the positioning extrusion mechanism is matched with the positioning extrusion mechanism to realize the positioning extrusion of the channel type workpiece, the hydraulic cylinders are provided with control starting switches, because the channels are longer, a plurality of groups of positioning extrusion mechanisms can be arranged on the two sides of the channels, after the process is finished, welding of all welding seams is started, after the welding is finished, the top pressing hydraulic cylinder drives the pressing shaft to ascend to be separated from the outer wall of the top part of the channel type workpiece, and then the top pressing hydraulic cylinder is rotated to the other side far away from the channel type workpiece through a rotary support, the side surface tightly pushes the hydraulic cylinder to drive the side surface pressing shaft to be away from the outer wall of the side part of the channel type workpiece, the bottom top tightly pushes the hydraulic cylinder to drive the pressing block to be away from the bottom part of the channel type workpiece, the channel type workpiece is lifted out of the tool, and the manufacturing process is completed.

Claims

1. A positioning extrusion device is characterized in that: the vertical column comprises a vertical column, wherein a mounting hole is formed in the lower end of the vertical column, a side tightening mechanism is arranged on one side of the upper portion of the vertical column and comprises a mounting seat, an adjusting screw rod, a sliding support, a nut seat, a boss, a bearing, a side tightening hydraulic cylinder and a side support seat, the mounting seat is arranged on the vertical column, the adjusting screw rod is arranged on one side of the vertical column and fixedly connected with the vertical column, a longitudinal guide rail is fixedly arranged on the mounting seat, the sliding support is arranged on the mounting seat and slidably connected with the mounting seat, the nut seat is arranged on the sliding support and fixedly connected with the sliding support, the boss is arranged above the nut seat and fixedly connected with the mounting seat, one end of the adjusting screw rod is connected with the boss through the bearing, the other end of the adjusting screw rod penetrates through the nut seat and is in threaded connection with the nut seat, the side tightening hydraulic cylinder is horizontally arranged on the sliding support, the side supporting seat is fixedly arranged on the sliding support, the side propping hydraulic cylinder is fixedly connected with the side supporting seat, and a piston rod of the side propping hydraulic cylinder forms a free extrusion end.

2. The positional extrusion apparatus of claim 1, wherein: the utility model discloses a hydraulic cylinder support device, including stand, stand lower extreme, bottom guide rail support, mounting hole, piston rod perforation, bottom guide rail support, the tight hydraulic cylinder in top is arranged in the bottom on the hydraulic cylinder support and with hydraulic cylinder support fixed connection, the piston rod that the tight hydraulic cylinder in bottom top passed the stand perforates with top tight piece fixed connection, top tight piece lower extreme is arranged in on the bottom guide rail support, be equipped with the guide rail on the bottom guide rail support, top tight piece and bottom guide rail support sliding connection.

3. A positional extrusion apparatus as claimed in claim 2, wherein: the utility model discloses a hydraulic cylinder, including stand, fixed sliding sleeve, sliding support, sliding sleeve and fixed sliding sleeve sliding connection, the stand upper end is equipped with top pushing mechanism, top pushing mechanism includes slewing bearing, fixed sliding sleeve, sliding support and top and pushes down the hydraulic cylinder, the stand upper end is equipped with fixed sliding sleeve, fixed sliding sleeve lower extreme is connected with the stand through slewing bearing, transversely be equipped with the sliding sleeve in the fixed sliding sleeve, sliding sleeve and fixed sliding sleeve sliding connection, transversely be equipped with sliding support in the sliding sleeve, sliding support and sliding sleeve sliding connection, sliding support one side is equipped with the top and pushes down the hydraulic cylinder, the hydraulic cylinder seat and the sliding support fixed connection of hydraulic cylinder are pushed down at the top, the piston rod that the hydraulic cylinder was pushed down at the top forms freely and pushes down the end downwards.

4. A positional extrusion apparatus as claimed in claim 3, wherein: the hydraulic cylinder lower extreme is pressed down at the top is equipped with and pushes down guiding mechanism, it includes hydraulic support board, pushes down guide block, slide bearing and pushes down the hold-down shaft to push down guiding mechanism, sliding support one side interval is fixed and is equipped with hydraulic support board and pushes down the guide block, hydraulic cylinder and hydraulic support board fixed connection are pressed down at the top, push down the hold-down shaft upper end and pass and push down the guide block and the piston rod lower extreme fixed connection of top hydraulic cylinder, push down the hold-down shaft and be connected with the guide block that pushes down through slide bearing, the lower extreme of pushing down the hold-down shaft forms the free end that pushes down.

5. A positional extrusion apparatus as claimed in claim 1 or 2 or 3 or 4 wherein: the side guide mechanism is arranged on the sliding support and comprises a side guide block, a sliding bearing and a side pressing shaft, the side guide block is arranged on the sliding support and fixedly connected with the sliding support, the side guide block and the side support seat are arranged in parallel at intervals, the sliding bearing is arranged in the middle of the side guide block, one end of the side pressing shaft is fixedly connected with a piston rod of the side pressing liquid cylinder, the other end of the side pressing shaft penetrates through the side guide block to form a free pressing end, and the side pressing shaft is connected with the side guide block in a sliding mode through the sliding bearing.

6. A positional extrusion apparatus as claimed in claim 3 or 4, wherein: the locking mechanism is arranged on the fixed sliding sleeve and the sliding sleeve respectively, the locking mechanism comprises a knob, a screw rod and a blocking piece, the knob is arranged on the outer side of the fixed sliding sleeve, the blocking piece is arranged between the inner wall of the fixed sliding sleeve and the outer wall of the sliding sleeve, the knob is arranged on the outer side of one end of the sliding sleeve, the blocking piece is arranged between the inner wall of the sliding sleeve and the outer wall of the sliding support, one end of the screw rod is fixedly connected with the knob, the other end of the screw rod penetrates through the fixed sliding sleeve or the sliding sleeve and is fixedly connected with the blocking piece, and the screw rod is in threaded connection with the fixed sliding sleeve or the sliding sleeve.

7. The positional extrusion apparatus of claim 6, wherein: the outer wall of the left end and the outer wall of the right end of the sliding sleeve are respectively provided with a limiting block, the outer wall of the left end and the outer wall of the right end of the sliding support are respectively provided with a limiting block, and the limiting blocks are fixedly connected with the sliding sleeve or the sliding support.

8. A positional extrusion apparatus according to claim 3, 4 or 7 wherein: and handles are respectively arranged on one side of the outer wall of the sliding sleeve and one side of the outer wall of the sliding support, and the handles are fixedly connected with the sliding sleeve or the sliding support.