A kind of drilling-hole positioning device
Technical field
The invention belongs to the process unit of machining, be specifically related to a kind of drilling-hole positioning device.
Background technology
Some machine components have only hole boss for connecting flexible pipe owing to the needs of function often design at certain position, and boss cylindrical is made up of anti-slip part and hermetic unit.Boss oral area makes the similar hemispheric annular projection in a bit of cross section, and in order to block rubber tube with anti-slip, other positions of boss are made a long section cylinder and are used as sealing surface, and the cylindrical straight hole of boss middle processing one is for ventilation or water flowing.Conventional machining process is to position with the Position with One Plane and Two Holes of part, then arranges drill bushing at theoretical position place, only hole, and drill bit is holed under the guiding of drill bushing.Owing to the concordance of blank is poor, the center, hole that part processes, often not at the center of boss, is caused hole wall partially thin or hole wall is penetrated, produce a large amount of waste product.
Summary of the invention
Present invention aims to the deficiency of existing processing technique and provide a kind of accurate positioning, easy to adjust, make simple drilling-hole positioning device.
The technical scheme is that and include bushing plate, be loaded on the locating piece below bushing plate;Described bushing plate is provided with a step through-hole, and step through-hole includes being positioned at bottom for holding the big stepped hole of part upper end to be processed jut and superposed small stair hole, and the small stair portion of step drill bushing is plugged in the small stair hole of bushing plate;Locating piece is provided with hole, location corresponding with bushing plate step through-hole, that card fills part to be processed, and locating piece side is equipped with being used for locking the tie down screw of part to be processed.
Described locating piece side has and positions the screwed hole that hole connects, and tie down screw is loaded on screwed hole.
Hole, described location is made up of V-arrangement section holes and rectangle cross-shaped holes, and drill bushing centrage is equal with the radius of part cylindrical portion to be processed to the distance of V-arrangement section holes inwall two plane.
Described bushing plate is loaded on locating piece through screw, straight pin.
Cross section, hole, location is made up of the two sections being approximately V-arrangement cross section be approximately square-section.Part only hole boss periphery is close in V-arrangement face makes only hole boss be accurately positioned, the tie down screw screwed hole Clamp blocks by opposite side.Drill bushing is loaded in bushing plate small stair hole, and bushing plate and locating piece are positioned by straight pin, it is ensured that boss center, drill bushing center alignment element only hole.Together with bushing plate is connected by screw with locating piece.Tie down screw is welded by screw rod and moving rod.Compared with other technologies, accurate positioning of the present invention, simple in construction, easy to adjust, with low cost and easily safeguard, it is suitable for widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the top view after Fig. 2 removes drill bushing, bushing plate.
Fig. 5 is the structural representation of locating piece of the present invention.
Fig. 6 is the B-B cut-away view of Fig. 5.
Fig. 7 is the structural representation of bushing plate of the present invention.
Fig. 8 is the top view of Fig. 7.
In figure, 1, bushing plate, 2, small stair hole, 3, big stepped hole, 4, annular projection, 5, only hole boss, 6, cylindrical straight hole, 7, centrage, 8, part to be processed, 9, cylindrical portion, 10, tie down screw, 11, locating piece, 12, hole, location, 13, drill bushing, 14, drill bushing endoporus, 15, drill bushing centrage, 16, screw, 17, stepped hole, 18, straight pin, 19, cylinder pin hole, 20, screw hole, 21, V-arrangement section holes, 22, rectangle cross-shaped holes, 23, screwed hole, 24, V-arrangement section holes inwall plane one, 25, V-arrangement section holes inwall plane two.
Detailed description of the invention
In Fig. 1, the present invention includes bushing plate 1, is loaded on the locating piece 11 below bushing plate 1, and bushing plate 1 is provided with a step through-hole, and the small stair portion of step drill bushing 13 is plugged in the small stair hole 2 of bushing plate 1;Locating piece 11 is provided with hole, location 12 corresponding with bushing plate 1 step through-hole, that card fills part to be processed, and locating piece 11 side is equipped with being used for locking the tie down screw 10 of part to be processed.Only hole boss 5 of part 8 to be processed comprises several parts such as cylindrical portion 9, annular projection 4, cylindrical straight hole 6, only hole boss 5 own centre line 7.Hole 12, location is made up of V-arrangement section holes and rectangle cross-shaped holes.Drill bushing centrage 15 is equal with the radius of part cylindrical portion 9 to be processed to the distance of V-arrangement section holes inwall two plane.Boss center, part only hole behind location and drill bushing endoporus 14 center essentially coincide.
Fig. 2, in 3, bushing plate 1 and locating piece 11 are positioned by straight pin 18, are connected by screw 16.Bushing plate 1 is shaped with the cylinder pin hole 19 location for straight pin 18, is shaped with the stepped hole 17 connection for screw 16.Locating piece 11 is shaped with the screw hole 20 corresponding with stepped hole 17.
In Fig. 4, boss upper end, part 8 to be processed only hole annular projection stretches in the big stepped hole of bushing plate, is stuck in V-arrangement section holes, offsets with part outer wall to be processed bottom tie down screw 10.11 is locating piece.
Fig. 5, in 6, locating piece 11 side has and positions the screwed hole 23 that hole 12 connects, and tie down screw 10 is loaded on screwed hole 23.Locating piece 11 is shaped with hole, location 12, two cylinder pin hole, two screw holes that are made up of V-arrangement section holes 21 and rectangle cross-shaped holes 22.V-arrangement section holes inwall two plane is V-arrangement section holes inwall plane 1, V-arrangement section holes inwall plane 2 25.
Fig. 7, in 8, bushing plate 1 is shaped with the small stair hole 2 of assembling drill bushing;It is shaped with big stepped hole 3 stepping down for the only hole boss annular projection of part.
During assembling, drill bushing 13 is assemblied in the small stair hole 2 of bushing plate 1, straight pin 18 is assemblied in the cylinder pin hole 19 of bushing plate 1 and locating piece 11, and screw 16 is assemblied in the stepped hole 17 of bushing plate 1 and the screw hole 20 of locating piece 11, and tie down screw 10 is assemblied in the screwed hole 23 of locating piece 11.When bushing plate 1 and locating piece 11 are assembled together, the centrage 7 that need to be adjusted the centrage 15 and cylindrical straight hole 6 making drill bushing endoporus 14 overlaps.
After drilling-hole positioning device assembles, being revolved the bottom of tie down screw 10 retreats in locating piece 11, again by the rectangle cross-shaped holes 22 of the annular projection traverse locating piece 11 of only hole boss of part, annular projection 4 is made to drop in the big stepped hole 3 of bushing plate 1, move in parallel drilling-hole positioning device, the V-arrangement section holes 21 making locating piece 11 is close to the cylindrical portion 9 of only hole boss 5, the centrage 7 of cylindrical straight hole 6 is made to essentially coincide with the drill bushing centrage 15 of drill bushing endoporus 14, screw in tie down screw 10 and make to withstand bottom it cylindrical portion 9 of only hole boss 5, drill bit carries out drill precise holes under the guiding of drill bushing endoporus 14, thus processing cylindrical straight hole 6.