CN205702612U - A kind of plate-shaped workpiece milling auxiliary mould - Google Patents

Abstract

This utility model relates to machining equipment field, is specifically related to a kind of plate-shaped workpiece milling auxiliary mould.This frock at least includes a horizontal delivery device and a vertical lifting body；Horizontal delivery device includes push rod and push rod gathering sill or push rod fairlead；Upwards postponing at the surface of push rod top ends and have push rod fairlead, push rod is positioned at the tube chamber of push rod fairlead and can make linear reciprocation action along lumen shaft length direction, has spacing between the putter shaft of push rod bottom face and underface；The oblique cutting of top ends of push rod has lozenges；Roller or ball is arranged at the bottom face of push rod；This frock also includes spring, and the elastic force of spring pushes direction and push rod pushes roller or ball is made the direct of travel of lifting action and arranged in the same direction.This frock is simple and efficient to handle and efficiency is high, can increase this clamping workpiece rigidity while not interfering former workpiece positioning states, and use cost is also available effectively to be reduced.

Description

A kind of plate-shaped workpiece milling auxiliary mould

Technical field

This utility model relates to machining equipment field, is specifically related to a kind of plate-shaped workpiece milling Auxiliary mould.

Background technology

In mechanical processing process, usually cause work due to factors such as the shaped flat of workpiece, thin-walleds Part structural rigidity is poor.For the workpiece of said structure poor rigidity, once enter milling operation, just Vibration and noise can be caused because of the effect of cutting force, at finished surface, the knife mark that shakes occurs therewith, make Machined surface roughness is poor, machining accuracy reduction；Time serious, even result in milling-cutting cutter disc tipping Situation is offset with the location dimension after secondary clamping；The qualification rate of strong influence workpiece and processing Manufacturing cost.For the Milling Process of large-sized sheet-type part, the most all use in sheet member 3 to 4 points of periphery use pressing plate to compress, and use supporting construction to be supported in the middle of sheet member Processing mode；What supporting construction was conventional has manual spiral support and low pressure shoring auxiliary to support work Dress.Manual spiral support leans on operator's to feel to regulate the height of support completely, once too low, Without supporting role, once too high, change former workpiece positioning states, it is clear that operating error degree is very big. Although manual adjustment and prison can be carried out in the way of table measurement is played in cooperation in manual handling thereof Survey, but also inevitably result in complicated property and the time-consuming of operation.The low pressure shoring of the latter auxiliary Helping supporting way, then must be equipped with the hydraulic system that a whole set of price is high, this is to many enterprises Speech is all no small financial burden.

Utility model content

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of rational in infrastructure And the plate-shaped workpiece milling auxiliary mould of practicality, it is simple and efficient to handle and efficiency is high.This frock This clamping workpiece rigidity can be increased while not interfering former workpiece positioning states, thus large-scale Plate-shaped workpiece Milling Processes realizes high accuracy to this workpiece reliably and assists support merit Can, use cost is also available effectively to be reduced.

For achieving the above object, this utility model have employed techniques below scheme:

A kind of plate-shaped workpiece milling auxiliary mould, it is characterised in that: this frock at least includes one Horizontal delivery device and a vertical lifting body；Described horizontal delivery device includes push rod and use In the push rod gathering sill or the push rod fairlead that guide push rod to make linearly operating along self bar length direction；? At the surface of push rod top ends, upwards postponing of vertical shape has push rod fairlead, and push rod is positioned at push rod In the tube chamber of fairlead and linear reciprocation action can be made along lumen shaft length direction, push rod bottom face with just There are spacing, push rod and push rod fairlead between the putter shaft of lower section and constitute above-mentioned vertical jack Structure；The oblique cutting of top ends of push rod has lozenges, this lozenges towards the bottom face of push rod, and Angle is there is between lozenges and push rod axis；Arrange at the bottom face of push rod and be used for and between lozenges Formed and roll the roller or ball coordinated；This frock also include for push push rod make unidirectional straight line move The spring made, the elastic force of described spring pushes direction and push rod pushes roller or lifting made by ball The direct of travel of action is arranged in the same direction.

This frock includes that profile is the shell body of threeway shape；Level in shell body runs through shell body Horizontal tract constitutes above-mentioned push rod fairlead, the vertical tract structure connecting horizontal tract in shell body Become above-mentioned push rod fairlead；Spring is stage clip, and this frock also includes along push rod the most coaxially arranged Guide post, sheathed spring on described guide post；Guide post is fixed in horizontal tract, spring The one end in portion is resisted against the close end of push rod, and on guide post, radial direction has been screwed for protecting Holding stage clip and be in the pre-loading screw of pressured state, the other end of spring is resisted against this pre-loading screw On.

With push rod with spring abutting end as tail end, be radially arranged with U-shaped at the tail end of push rod Draw-in groove；U-shaped draw-in groove profile is shoulder hole channel-shaped structure and its small-bore end end face composition of two-period form With the face that coordinates of spring, the profile of guide post is in the rank of the two-period form identical with U-shaped draw-in groove grooved Ladder shaft-like structure；The enlarged diameter section of guide post embeds in the large aperture section of U-shaped draw-in groove, and major diameter Segment length is less than large aperture segment length, and enlarged diameter section coordinates to form limit between takeing on the hole of U-shaped draw-in groove Position push rod pushes the first Horizontal limiting unit of direction shift length along spring.

Being arranged with the stopper slot of strip counterbore shape at described push rod outer wall, this stopper slot flute length is parallel Push rod length direction, and stopper slot along push rod outer wall to spring direction extend with the tail running through push rod End end face；The horizontal tract of shell body extends radially through layout screwed hole, and stop screw passes this spiral shell Pit end extend in the vallecular cavity of stopper slot, between stop screw and the cell wall of stopper slot and bottom land Having gap, stop screw and stopper slot collectively form spacing push rod to spring direction shift length The second Horizontal limiting unit.

Guide post relatively and the other end horizontal direction of push rod abutting end extends shell body, and Arrange at its elongated end and be easy to hand-held knurled nut.

Radially being arranged with the spacing hole of counterbore shape at the outer wall of push rod, this spacing hole is rectangular along push rod bar Setting is upwardly extended to by push rod outer wall vertical；The vertical tract of shell body extends radially through and arranges spiral shell Stricture of vagina installing hole, caging bolt is through threaded mounting hole and in stretching into the vestibule of spacing hole；Caging bolt Top end face and the hole wall of spacing hole and bottom surface, hole between have spacing；Caging bolt is common with spacing hole Coordinate to constitute the vertical position-limiting unit of spacing mandril lift.

Horizontal tract arranges that horizontal axle sleeve, push rod constitute sliding with this trunnion axis inner room and coordinate, and is pushing away It is arranged with sealing ring at one section of body of rod outer wall between lozenges place shaft and the push rod tail end of bar, This sealing ring constitutes sealing with trunnion axis inner room and coordinates；Vertical axle sleeve, push rod is arranged in vertical tract Constitute sliding with vertical axis inner room to coordinate, at the shaft of the close bottom face of push rod, be arranged with use equally The sealing ring coordinated is sealed in constituting with vertical axis inner room.

It is arranged with the roller groove embedded for roller, roller groove along its axis at the bottom face of described push rod Groove depth less than the wheel footpath of roller, the two ends wheel shaft of roller is respectively embedded into two relative cell walls of roller groove In and therewith constitute revolution coordinate.

Push rod includes push rod body, protective cover and the cylinder slide block structure the most sequentially coaxially arranged Becoming, cylinder slide block forms the carrier disposed for roller or ball；Protective cover profile is downward opening Barrel-shaped structure, and the internal diameter of protective cover is more than external diameter at the vertical tract place on shell body；Top The body of rod constitutes the cooperation section directly abutting sheet member to be processed, the sole arrangement stud section of push rod body； Stud section along protective cover axially penetrate through protective cover and and the top end face of cylinder slide block between constitute screw thread join Close.

The beneficial effects of the utility model are:

1), abandoned traditional unstable manual external force support brought error greatly, and Hydraulic system supports the defect with high costs caused.This utility model uses horizontal delivery device Coordinate the modular mode of vertical lifting body, using push rod as force side, using push rod as Force rod, using corresponding groove set as guide part, thus utilizes push rod top end lozenges and push rod The inclined-plane latching characteristics of ball or roller at bottom face, finally achieves push rod thin plate the most to be processed Part steady against effect.The spring force mechanism that this utility model is used, it is different from tradition Craft force or hydraulic pressure force, but merely with the elastic reaction of spring self, thus water Flat propelling movement push rod is allowed to move ahead, and makes the lozenges on push rod push roller or ball, finally Push rod is made to produce lift motion.This utility model is had an effect to push rod lift, whole process by spring Stablize gently, it is not necessary to the extra external force such as craft or hydraulic pressure drives, and what frock supported initially connects Touch fluctuation range is in very in zonule all the time, thus is prevented effectively from and produces former workpiece positioning states Raw destroy, too increase frock folder rigidity, it is therefore prevented that tipping that cutter phenomenon of shaking causes and manufacturing deficiency, Improve processing stability and the crudy of sheet member especially large-scale sheet part.

2), as the further preferred scheme of such scheme, this utility model uses shell body conduct Dust-proof and the bearing substrate of whole frock, thus provide push rod, push rod and spring to accommodate Space.The threeway shape design of shell body, forms above-mentioned fairlead or gathering sill with each tract, its knot Structure arranges succinct and reasonable.The preferred stage clip of spring, and assist guiding further with guide post, Thus utilize the elastic thrust of stage clip, ensure the push rod traveling purpose along set direction.Spacing spiral shell The layout of nail so that spring is under suitable pretightning force state all the time.Spring can keep pre- Clamp force, push rod produces the action that moves ahead the most all the time under the elastic force of spring, and then makes push rod Lozenges has a top lift, owing to this top lift is complete all the time to ball or ball or even push rod all the time The predictable spring force of full dependence is used as original thrust, and therefore top lift the most just can be in all the time In one stable and controlled interval.

3), the layout of U-shaped draw-in groove, it is achieved that push rod is effectively connected with guide post.By this kind Bridging mode, on the one hand ensure that push rod and the assembling integraty of guide post and steadiness.The opposing party Face, then make use of the stairstepping engagement formation between U-shaped draw-in groove and guide post, thus achieving pressure Spring reliable against while, also ensure that the limit effect to push rod maximum travel distance.Guide The enlarged diameter section length of bar is necessarily less than the large aperture segment length of U-shaped draw-in groove；In other words, guide Bar is as spacing without other, it may be that can make certain string axial along guide post in U-shaped draw-in groove Dynamic action.The distance of this axial vibration action, namely spring is relative to the maximum jacking of push rod Distance.The maximum travel distance to push rod spacing after, the backway of push rod should also be as Limit.The restriction of this backway then relies on the second Horizontal limiting unit, namely stopper slot collocation limit Position screw realizes.Owing to stopper slot is to extend through push rod tail end end face along its length Unilateral through slot structure, therefore, stop screw only need to rely on the close push rod top end with stopper slot Cell wall between constitute spacing cooperation, can realize for push rod direction of retreat, namely spacing push rod to The distance limit effect of spring direction displacement, it is rational in infrastructure and implementation succinct, and work can Lean on and stablize.On the basis of above-mentioned Horizontal limiting unit, this utility model in like manner arranges that vertical limits Bit location, to realize the push rod process limit effect along jacking direction.

4), horizontal axle sleeve and the setting of vertical axle sleeve, it is ensured that the traveling motility of push rod and push rod, And the tract avoiding horizontal tract or vertical tract directly to contact push rod or push rod and cause can be synchronized Wear condition, to extend the service life of shell body self.In addition, it is contemplated that push rod and push rod Use as moving part after all, it is therefore necessary between corresponding axle sleeve and the corresponding body of rod, lubrication is set Fat or lubricating oil, to promote its action response.The setting of sealing ring, it is to avoid grease or profit The possibility that lubricating oil in the tract of lubricating oil place outwardly permeates, ensure that equipment the most accordingly Functional reliability and cleanliness factor.

5), the preferred roller groove of bottom face of push rod coordinates the combinative structure of roller, thus on the one hand protects Demonstrate,prove the rolling fiting effect of lozenges at push rod and push rod, on the other hand then achieve roller and top The Perfect Matchings purpose of bar.Push rod body pierce through the protection cover, and and cylinder slide block between constitute threaded engagement, So that push rod is integrally formed.Wherein, push rod body is responsible for constituting against coordinating with sheet member bottom surface to be processed. Protective cover then plays the cover to shell body corresponding site and sets and protect purpose, to avoid operator by mistake At most bar causes Personal Risk with the place that coordinates of vertical tract, also can play certain dust-proof simultaneously With the infiltration situation avoiding top milling liquid.Cylinder slide block then as the supporting body of roller, serves With push rod directly coordinate purpose.The modules of push rod is respectively taken charge of its duty and works in coordination, module Production and the assembling mode changed in turn ensure that it possesses high interchangeability and maintainability, can be effectively Reduce while it manufactures cost, promote its later stage maintenance efficiency greatly.

Accompanying drawing explanation

Fig. 1 is working state schematic representation of the present utility model；

Fig. 2 is schematic top plan view of the present utility model；

Fig. 3 is the structural representation of guide post and knurled nut.

Illustrate each label as follows with concrete component names corresponding relation of the present utility model:

A-sealing ring b-sheet member to be processed

11-push rod 11a-lozenges 11b-U type draw-in groove 11c-stopper slot

The 12-push rod fairlead 13-horizontal axle sleeve of stop screw 14-

21-push rod 21a-spacing hole

211-push rod body 212-protective cover 213-cylinder slide block 211a-stud section

22-push rod fairlead 23-caging bolt 24-vertical axle sleeve 25-roller

31-spring 32-guide post 32a-enlarged diameter section 33-pre-loading screw

40-shell body 50-knurled nut

Detailed description of the invention

For ease of understanding, here in connection with Fig. 1-3 to concrete structure of the present utility model and work process Make described further below:

This utility model is embodied as structure as shown in Figure 1-2, outside as parts supporting body Housing 40, arranges horizontal tract and vertical tract in shell body 40, two tracts are fitted to each other formation The threeway tract structure of similar tee T.

The horizontal thrust bar knot cooperatively formed by push rod 11 and guide post 32 is disposed in horizontal tract Structure, more specifically coordinates, and is: push rod 11 tail end arranges U-shaped draw-in groove 11b, with U-shaped draw-in groove The two-period form stepped groove-shaped structure of 11b, coordinates the two-period form rank of guide post 32 as shown in Figure 3 Ladder axle structure, thus the unidirectional seam forming both coordinates.Small-bore section at U-shaped draw-in groove 11b Nose end at guide post 32 shaft between pre-loading screw 33, the spring of sheathed stage clip structure Portion 31, with provide push rod 11 with the faintest propelling movement power, to ensure that push rod 21 is located all the time Under the impetus of top lift slightly.The position of pre-loading screw 33 opposite shell body 40 is such as Shown in Fig. 2.One end extending shell body 40 of guide post 32 is arranged and is easy to hand-held annular knurl spiral shell Female 50, shaft then can be directly anchored on shell body 40.Arrange such as Fig. 1 at push rod 11 outer wall Shown stopper slot 11c, coordinates stop screw 14, to form spacing push rod 11 backway Spacing restraining structure.

The cylinder slide block 213 with roller 13, protective cover from bottom to top it is sequentially arranged in vertical tract 212 and push rod body 211.Roller 13 embeds the roller groove 21b at the bottom face of cylinder slide block 213 In coordinate being constituted revolution therewith, and the wheel face of roller 13 simultaneously with the lozenges 11a of push rod 11 Between constitute roll coordinate.Protective cover 212 tips upside down at the end face of vertical tract, to play protection effect Really.Push rod body 211 1 aspect is as directly supporting end, to realize treating the flat of processing sheet part b Steady support effect, the most then as linkage section, to be respectively communicated with fixing protective cover 212 and circle Post slide block 213, finally makes three form integrative-structure.At the outer wall of cylinder slide block 213 same Arrange the spacing hole of similar above-mentioned stopper slot 11c, to be collectively forming spacing top with caging bolt 23 The spacing restraining structure of bar 21 lift height.

Certainly, for ensureing work response and the sensitivity of structure, and guarantee that the actual of frock makes With the life-span, outside push rod 11 and this kind of moving part of push rod 21, also it is arranged with one layer of axle sleeve structure. Sealing ring a is arranged at face, to ensure tract internal and external environment with coordinating of the corresponding body of rod at corresponding axle sleeve Sealing.

Work process of the present utility model is as follows:

Assemble each parts, lay in the U-shaped draw-in groove 11b at guide post 32 to push rod 11, fixing On guide post 32 to shell body 40.By being pre-adjusted the pressure of stage clip, make the pretightning force of stage clip In the range of being in suitably, and then realize the workpiece stress between lozenges 11a and push rod 21 The regulation purpose of situation, finally realizes the auxiliary support effect that weak spring controls.By aforesaid operations, Can make the initial contact fluctuation range set of this frock in very zonule, be prevented effectively from former The destruction of workpiece positioning states, adds frock folder rigidity, it is therefore prevented that the tipping that cutter phenomenon of shaking causes And manufacturing deficiency.

This utility model compared with prior art, has the advantage that

1, reliability is high, supporting & stablizing.In this frock, auxiliary supports and only provides power Stage clip, and exert a force for the conventional torsion of the axial elasticity rate of stage clip more stable reliably, thus Make push rod 21 energy reliable and the contact part of all-the-time stable.Additionally, the big I of elastic force is passed through The length of stage clip namely spring 31 adjusts, and is easily controlled.After elastic force is adjusted, with regard to energy It is always maintained at this elastic force of stablizing and is supplied to the lozenges 11a at push rod 11.When push rod 11 is connecing When receiving the energy conducted at push rod 21 because of Milling Process vibration, due to lozenges 11a's Latching characteristics, makes push rod 11 rely on lozenges 11a and device body to become a firm entirety, Milling for part provides stable support force, thus prevents part significantly shaking when milling Dynamic situation, and then the surface that the most just improve sheet member b to be processed especially large-scale sheet part adds Working medium amount.

2, the labor intensity of workman can be effectively alleviated, strong interference immunity simultaneously, reliable and stable.This Utility model uses protective cover 212 to arrange in pairs or groups the dust-proof of shell body 40 and the built-in design of component, milling Add and will not affect the support effect of frock because of useless pin and cutting fluid man-hour.

3, highly versatile, is widely used.This utility model uses integrated design, for Irregular piece surface is when the global design of fixture, it is only necessary to according to the difference of part to be processed Adjust length or the elastic force of spring 31 of push rod 21, without redesigning other dresses Put, while ensureing self high workload efficiency, also possessed extremely strong structure versatility.

Claims (9)

1. a plate-shaped workpiece milling auxiliary mould, it is characterised in that: this frock at least includes One horizontal delivery device and a vertical lifting body；Described horizontal delivery device includes push rod And be used for guiding push rod (11) to make the push rod (11) of linearly operating along self bar length direction (11) Gathering sill or push rod fairlead (12)；Vertical shape at the surface of push rod (11) top ends Upwards postponing and have push rod fairlead (22), push rod (21) is positioned at the pipe of push rod fairlead (22) Intracavity and linear reciprocation action, push rod (21) bottom face and underface can be made along lumen shaft length direction Push rod (11) shaft between have in spacing, push rod (21) and push rod fairlead (22) composition State vertical lifting body；The oblique cutting of top ends of push rod (11) has lozenges (11a), this wedge Shape face (11a) is towards the bottom face of push rod (21), and lozenges (11a) and push rod (11) Angle is there is between axis；Arrange at the bottom face of push rod (21) and be used for and lozenges (11a) Between formed roll coordinate roller (25) or ball；This frock also includes for pushing push rod (11) Make the spring (31) of unidirectional linearly operating, the elastic force of described spring (31) push direction with Push rod (11) pushes roller (25) or ball is made the direct of travel of lifting action and arranged in the same direction.

A kind of plate-shaped workpiece milling auxiliary mould the most according to claim 1, its feature It is: this frock includes that profile is the shell body (40) of threeway shape；Water in shell body (40) The flat horizontal tract running through shell body (40) constitutes above-mentioned push rod fairlead (12), shell body (40) In connect horizontal tract vertical tract constitute above-mentioned push rod fairlead (22)；Spring (31) For stage clip, this frock also includes along the guide post (32) that push rod (11) is the most coaxially arranged, institute State the upper sheathed spring (31) of guide post (32)；Guide post (32) is fixed in horizontal tract, One end of spring (31) is resisted against the close end of push rod (11), on guide post (32) Being screwed for keeping stage clip to be in the pre-loading screw (33) of pressured state, spring of radial direction The other end in portion (31) is resisted against on this pre-loading screw (33).

A kind of plate-shaped workpiece milling auxiliary mould the most according to claim 2, its feature Be: with push rod (11) with spring (31) abutting end as tail end, at push rod (11) Radially it is arranged with U-shaped draw-in groove (11b) at tail end；U-shaped draw-in groove (11b) profile is the rank of two-period form Ladder hole slot columnar structure and its small-bore end end face constitute with spring (31) coordinate face, guide post (32) profile is in the ladder shaft-like structure of the two-period form identical with U-shaped draw-in groove (11b) grooved； The enlarged diameter section (32a) of guide post (32) embeds in the large aperture section of U-shaped draw-in groove (11b), And enlarged diameter section (32a) length is less than large aperture segment length, enlarged diameter section (32a) and U-shaped card Coordinate to form spacing push rod (11) along spring (31) propelling movement side between the hole shoulder of groove (11b) To the first Horizontal limiting unit of shift length.

A kind of plate-shaped workpiece milling auxiliary mould the most according to claim 3, its feature It is: at described push rod (11) outer wall, be arranged with the stopper slot (11c) of strip counterbore shape, should Stopper slot (11c) flute length parallel push rods (11) bar length direction, and stopper slot (11c) is along push rod (11) outer wall extends to spring (31) direction with the tail end end face running through push rod (11)；Outward The horizontal tract of housing (40) extends radially through layout screwed hole, and stop screw (13) is through being somebody's turn to do Screwed hole end extend in the vallecular cavity of stopper slot (11c), and stop screw (13) is with spacing Gap, stop screw (13) and stopper slot (11c) is had between the cell wall of groove (11c) and bottom land Collectively form the spacing push rod (11) the second Horizontal limiting to spring (31) direction shift length Unit.

5. according to a kind of plate-shaped workpiece milling auxiliary mould described in Claims 2 or 3 or 4, It is characterized in that: guide post (32) relatively and push rod (11) abutting end other end level to Extend shell body (40), and arrange at its elongated end and be easy to hand-held knurled nut (50).

6. according to a kind of plate-shaped workpiece milling auxiliary mould described in Claims 2 or 3 or 4, It is characterized in that: being radially arranged with the spacing hole of counterbore shape at the outer wall of push rod (21), this is spacing Hole is upwardly extended setting along push rod (21) bar length direction by push rod (21) outer wall vertical；Shell body (40) vertical tract extends radially through and is threaded installing hole, and caging bolt (23) passes spiral shell Stricture of vagina installing hole in stretching into the vestibule of spacing hole；The top end face of caging bolt (23) and spacing hole Spacing is had between hole wall and bottom surface, hole；Caging bolt (23) coordinates with spacing hole to constitute limit jointly The vertical position-limiting unit of position push rod (21) lift.

7. according to a kind of plate-shaped workpiece milling auxiliary mould described in Claims 2 or 3 or 4, It is characterized in that: horizontal tract arranges horizontal axle sleeve (14), push rod (11) and this horizontal axle sleeve (14) between constitute sliding coordinate, lozenges (11a) the place shaft in push rod (11) with push away It is arranged with sealing ring (a), this sealing ring (a) at one section of body of rod outer wall between bar (11) tail end Coordinate with constituting between horizontal axle sleeve (14) to seal；Vertical axle sleeve (24) is arranged in vertical tract, Constitute sliding between push rod (21) with vertical axle sleeve (24) to coordinate, the close bottom of push rod (21) It is arranged with equally at the shaft in face for sealing, with constituting between vertical axle sleeve (24), the sealing ring coordinated (a)。

8. assist according to a kind of plate-shaped workpiece milling described in claim 1 or 2 or 3 or 4 Frock, it is characterised in that: it is arranged with for roller along its axis at the bottom face of described push rod (21) (25) roller groove embedded, the groove depth of roller groove is less than the wheel footpath of roller (25), roller (25) Two ends wheel shaft be respectively embedded into two relative cell walls of roller groove in and constitute revolution therewith and coordinate.

9. according to a kind of plate-shaped workpiece milling auxiliary mould described in Claims 2 or 3 or 4, It is characterized in that: push rod body (211) that push rod (21) includes the most sequentially coaxially arranging, Protective cover (212) and cylinder slide block (213) are constituted, and cylinder slide block (213) is formed for rolling The carrier that wheel (25) or ball dispose；Protective cover (212) profile is downward opening barrel-shaped Construct, and the internal diameter of protective cover (212) is more than at the vertical tract place on shell body (40) External diameter；Push rod body (211) constitutes the cooperation section directly abutting sheet member to be processed, push rod body (211) Sole arrangement stud section (211a)；Stud section (211a) axially penetrates through along protective cover (212) Protective cover (212) and and the top end face of cylinder slide block (213) between constitute threaded engagement.