Stepped hole end face roll extrusion cutter
Technical field
The utility model belongs to the Machining Technology field, relates to the rolling and processing technology, is specifically related to a kind of stepped hole end face roll extrusion cutter.
Background technology
Processing technologys such as normal at present employing ream is cut, grinding, roll extrusion are treated machined surface and are carried out fine finishining, so that to be processed roughness reaches designing requirement.The valve body structure of existing high-voltage switch gear is as shown in Figure 1, and its inside is provided with a plurality of coaxial stepped holes, and the aperture of the stepped hole of this part is less relatively, and the roughness of stepped hole end face is had relatively high expectations, and designing requirement is 0.8um.And adopt ream to cut technology to the processing of stepped hole end face, and can not reach the roughness requirement of design, ream is cut, grinding technics processing if adopt; Though can reach the roughness requirement of design; But efficient is very low, to the fine finishining difficulty of stepped hole end face, influences the production efficiency of valve body.
The utility model content
The purpose of the utility model is to provide a kind of stepped hole end face roll extrusion cutter that uses simple in structure, convenient, to solve in the prior art stepped hole end face fine finishining difficult technologies problem.
For realizing above-mentioned purpose; The utility model adopts following technical scheme: stepped hole end face roll extrusion cutter; Comprise handle of a knife; Be rotatably equipped with cutter head through bearing arrangement on the handle of a knife, the center of rotation axis of bearing arrangement extends towards the week of handle of a knife laterally, and the end of described cutter head has the roll extrusion portion that is rotary structure; The center of rotation axis conllinear of the centre of gyration axis of roll extrusion portion and said bearing arrangement, the revolution side face that central axis is changeed in the wraparound of said roll extrusion portion is the roll extrusion working face that is used for the end face to be processed of stepped hole is carried out rolling and processing.
Described handle of a knife is made up of linearly extended knife bar and the mount pad that is used to cutter head is installed that is fixedly installed on the knife bar end; Described cutter head is a roller; Mount pad is provided with the pilot hole coaxial with said bearing arrangement; The axis of pilot hole and the central axis of knife bar intersect, and the coaxial rotation of described roller is assemblied in the pilot hole on the said mount pad.
There is contiguous block the end that being used to of described knife bar assembled mount pad through thread connection, and the side towards knife bar on mount pad has been wholely set mounting groove, and described contiguous block correspondence is fixedly mounted in the described mounting groove.
Described contiguous block is a slide block; Said mounting groove is a chute; The bearing of trend of chute is perpendicular to the bearing of trend of knife bar; On chute, be provided with and supply slide block to slide with the slideway of adjusting slider position, slideway extends along the chute bearing of trend, and also being provided with on the described roll extrusion cutter is used for sliding at slide block is fixed on the slide block fixed structure of chute with slide block after putting in place.
Described chute is the T type groove structure; Slide block is the T type structure with the corresponding cooperation of T type groove; Have the corresponding both wings flange that embed to cooperate with T type groove on the slide block of T type structure, described slide block fixed structure comprises the anticreep Stop structure that being used between roof pressure fit structure, T type groove and the T type slide block of roof pressure face that cooperates with said T type groove roof pressure that the end that is used for assembling mount pad on the said knife bar has and T type groove prevents that T type slide block from deviating from from T type groove and the thread joined structure of knife bar and T type slide block.
Pilot hole on the described mount pad is a through hole; Described bearing arrangement by the groove on the through-hole wall face of mount pad, on the roller outer peripheral face groove, be arranged in the rolling element of said two grooves and be sleeved on the bearing pressure ring that being used on the roller compress rolling element and form, be useful on clamp nut in the end of roller through thread connection to the bearing pressure ring pretension.
The roll extrusion portion of described roller is a truncated cone, this truncated cone towards the radius of an end of mount pad radius less than an end that deviates from mount pad of truncated cone.
The tapering of described truncated cone is α, and the angle of the axis of pilot hole and the central axis of knife bar is β, and α/2 equal 90 degree with the β sum.
The beneficial effect of the utility model is: the stepped hole end face roll extrusion cutter that the utility model provided comprises handle of a knife and cutter head; Cutter head rotates through bearing arrangement and is assemblied on the handle of a knife, and the center of rotation axis of bearing arrangement extends towards the week of handle of a knife laterally, and the cutter head end has roll extrusion portion; The revolution side face of roll extrusion portion is the roll extrusion working face; When adopting above-mentioned end face roll extrusion cutter that the stepped hole end face is carried out rolling and processing, the roll extrusion cutter is moved stepped hole, the central axis of the knife bar of roll extrusion cutter and the central axis of stepped hole coincide; And the roll extrusion working face that makes cutter head roll extrusion portion is when being pressed on the end face to be processed of stepped hole; Under the handle of a knife effect, roll extrusion working face and end face to be processed are adjacent to and certain crush will be arranged, when handle of a knife drives the cutter head rotation; Under the effect of elasticity between the end face to be processed of the roll extrusion working face of the roll extrusion portion of cutter head and stepped hole and friction; On end face to be processed, realize rolling and rolling, thereby realize rolling and processing, and then realized improving the purpose of workpiece surface roughness and mechanical performance the end face to be processed of stepped hole.The roll extrusion cutter that the utility model provided simple in structure, easy to use is convenient to the stepped hole end face is carried out rolling and processing, is specially adapted to the little stepped hole of radial dimension.
Description of drawings
Fig. 1 is the structural representation of existing high-voltage switch gear valve body;
Fig. 2 is the structural representation of a kind of embodiment of the rolling tools that provide of the utility model;
Fig. 3 is Fig. 2 right side view;
Fig. 4 is the structural representation of mount pad among Fig. 2;
Fig. 5 is the A-A cutaway view of Fig. 4;
Fig. 6 is the structural representation of slide block among Fig. 2;
Fig. 7 is the user mode sketch map of the rolling tools shown in Fig. 2;
Fig. 8 is roller and the view of handle of a knife that is among Fig. 7 in the rolling tools of user mode.
The specific embodiment
Extremely shown in Figure 6 like Fig. 2; The embodiment of stepped hole end face roll extrusion cutter; Roll extrusion cutter in the present embodiment is made up of handle of a knife and the cutter head that is installed on the handle of a knife, and handle of a knife offers pilot hole 41 by forming along linearly extended knife bar 1 and the mount pad 4 that is used to cutter head is installed that is connected in the knife bar end on mount pad 4; The axis of pilot hole and the central axis of knife bar intersect; Described cutter head is a roller 2, and roller 2 is assemblied in the pilot hole through the bearing arrangement rotation that is arranged between roller and the pilot hole, and an end of the pilot hole that extends mount pad of roller 2 has the roll extrusion portion that is used for stepped hole end face to be processed is carried out rolling and processing; Roll extrusion portion is rotary structure; Revolution side face around roller axis in the roll extrusion portion is the roll extrusion working face that is used for the end face to be processed of stepped hole is carried out rolling and processing, and in the present embodiment, the structure of roll extrusion portion is around the rotating truncated cone of roller axis; This truncated cone towards the radius of an end of mount pad radius less than an end that deviates from mount pad of truncated cone; The tapering of truncated cone is α, and the angle of the axis of pilot hole and the central axis of knife bar is β, and α/2 will equal 90 degree with the β sum; Make roll extrusion portion when the end face to be processed to stepped hole carries out rolling and processing, the plain line C of the revolution of roof pressure on the end face to be processed of stepped hole keeps vertical with the central axis of knife bar on the roll extrusion working face of truncated cone.
Pilot hole in the present embodiment is a through hole; Bearing arrangement between roller and the pilot hole is a rolling bearing structure; This rolling bearing structure is made up of groove on the groove on the pilot hole internal face, the roller outer peripheral face and the rolling element between two grooves 5, and rolling element is a ball in the present embodiment, for ease of ball is installed; End at roller is set with bearing pressure ring 6, and this bearing pressure ring 6 carries out pretension by 7 pairs of bearing pressure rings of the fastening nut of thread connection on roller.During assembling, behind the pilot hole of mount pad that roller, ball are all packed into, bearing pressure ring is sleeved on the roller, then with the fastening nut spinning on roller, at last with the suitable pretightning force fastening nut of screwing, accomplish the assembling of rolling bearing structure.
In the foregoing description, roller, ball and mount pad constitute rolling bearing structure, and roller is equivalent to bearing inner race, and mount pad is equivalent to bearing outer ring.In other embodiments, bearing also can directly be installed to realize the rotation assembling of roller and mount pad between mount pad and ball.
End that is used to assemble mount pad at knife bar 1 has the slide block 3 as contiguous block through thread connection; Side towards knife bar on mount pad 4 is wholely set the chute 42 as mounting groove; The bearing of trend of chute is perpendicular to the bearing of trend of knife bar, and described chute is provided with and supplies slide block to slide with the slideway of adjusting slider position, and slideway extends along the bearing of trend of chute; And for anti-limited slip block is deviate from from chute; The structure of chute is the T type groove structure, and slide block is the corresponding T type structure that is slidingly matched with the scarf groove of T type groove structure, has the corresponding both wings flange 31 that cooperates that embeds with T type scarf groove on the slide block of T type structure.When slide block moves to the appropriate location in slideway; Slide block fixed structure through being arranged on the roll extrusion cutter is fixed on slide block in the chute; In the present embodiment; The slide block fixed structure comprises the anticreep Stop structure that being used between roof pressure fit structure, T type groove and the T type slide block of roof pressure face that cooperates with said T type groove roof pressure that the end that is used for assembling mount pad on the said knife bar has and T type groove prevents that T type slide block from deviating from from T type groove and the thread joined structure of knife bar and T type slide block; During use, the turn knife bar spurs knife bar and T type slide block through the screw fit between knife bar and the slide block in opposite directions; Knife bar and T type slide block along the thread connection portion between knife bar and the slide block axially on be clamped on the T type groove from both sides, thereby realize the fixed connection of knife bar, slide block and mount pad.Above-mentioned connection fixed form is relatively good, realizes the fixed connection of knife bar, slide block and mount pad, when the position of needs adjustment slide block in chute; The turn knife bar; Through the screw fit between knife bar and the slide block knife bar and T type slide block are moved towards away from each other direction mutually, knife bar and T type slide block no longer clamp T type groove, and T type slide block can slide in T type groove like this; After slip puts in place, again knife bar, slide block and mount pad are fixed together again.In other are implemented, also can adopt other slide block fixed structure, like bolt connection structure; After slide block moves into place, through bolt slide block is fixed in the chute, when needs adjustment slide position; Can unscrew bolt; Let slide block in chute, slide, after slip puts in place, through bolt slide block is fixed in the chute again again.
The structure of mount pad 4 through slide block 3 and chute 42 connected with knife bar 1; Like this through adjusting the relative position relation of slide block and chute; Can do accommodation to the roll extrusion cutter according to the radial dimension of stepped hole end face, enlarge the scope of application of roll extrusion cutter, improve the service efficiency of roll extrusion cutter.Simultaneously,, can also directly change mount pad, not need more changing knife rod this moment, save maintenance cost if infringement appears in the pilot hole of the assembling of corresponding rotation with roller.
In the above-described embodiments; Described cutter head is a roller, and roller rotates through bearing arrangement and is assemblied in the pilot hole of mount pad, in other are implemented; Also can bolster be set in the position that mount pad former is used to be provided with pilot hole; This bolster extends towards the axial outside of handle of a knife, and described cutter head is the sleeve of coaxial package on bolster, between bolster and sleeve, is provided with to make both rotate the bearing arrangement of assembling; At this moment; The outer peripheral face of described sleeve is the roll extrusion working face, the angle of the central axis of the central axis of the angle of the central axis of the central axis of sleeve and knife bar and as shown in Figure 7 roller and knife bar here, and have the truncated cone shown in 2 on the sleeve equally.
Like Fig. 7, shown in Figure 8; Using when the stepped hole end face being carried out rolling and processing like the roll extrusion cutter among Fig. 2, the embodiment shown in Figure 3; Roll extrusion cutter 100 is moved in the stepped hole 200, and the central axis of the knife bar 1 of roll extrusion cutter and the central axis of stepped hole 200 coincide, and make the roll extrusion working face of roller rolling press portion be pressed in the 300 last times of end face to be processed of stepped hole; The plain line C of the revolution of roof pressure on the end face to be processed of stepped hole keeps vertical with the central axis of knife bar on the roll extrusion working face of truncated cone; Under the handle of a knife effect, roll extrusion working face and end face to be processed are adjacent to and certain crush will be arranged, when handle of a knife drives the cutter head rotation; Under the effect of elasticity between the end face to be processed of the roll extrusion working face of roller and stepped hole and friction; Roller is realized rolling and rolling at end face to be processed, thereby realizes the rolling and processing to the end face to be processed of stepped hole, and then has realized improving the purpose of workpiece surface roughness and mechanical performance.
Be to be provided with mount pad between the roller at knife bar and cutter head in the present embodiment; In other embodiments; Also can on knife bar, be wholely set pilot hole, the roller rotation is assemblied in the pilot hole on the knife bar, can accomplish rolling and processing equally the stepped hole end face.
In the present embodiment, the angle β of the axis of roller and the central axis of knife bar is less than 90 degree, and the roll extrusion portion of roller is a truncated cone; Truncated cone towards the radius of an end of mount pad radius less than an end that deviates from mount pad of truncated cone; The tapering of truncated cone is α, at this moment, and for improving roll extrusion efficient and considering the stressing conditions of the roll extrusion portion of roller; α/2 equal 90 degree so that roll extrusion portion is when the end face to be processed to stepped hole carries out rolling and processing with the β sum; The plain line of roof pressure on the end face to be processed of stepped hole keeps vertical with the central axis of knife bar on the roll extrusion working face of truncated cone, guaranteed the work area of the roll extrusion working face of roll extrusion portion so on the one hand, also improved the force-bearing situation of roller on the other hand; Promptly improve working (machining) efficiency, prolonged the service life of roller again.In other embodiments, the angle β of the axis of roller and the central axis of knife bar equals 90 when spending, and the roll extrusion portion of roller can select cylinder for use; And when the angle β of the central axis of the axis of roller and knife bar spends greater than 90; The roll extrusion portion of roller can select truncated cone for use equally; The truncated cone of this moment can be towards the radius of an end of installation group greater than the radius of the end that deviates from mount pad of joint cone; The tapering of truncated cone still is α, and this is, only need make the difference of β and α/2 equal 90 and spend and get final product.