CN218533627U - Special fixture for drilling process of top drive rotary head - Google Patents

Abstract

The utility model discloses a top drive turret drilling technology special fixture, affiliated field is drilling jig design field. The quick-change drill bushing device comprises a base, a hand-pull type positioner, an index plate, a support, a quick locking device, a pressing plate, a quick-change drill bushing, a drill plate, a positioning pin, a supporting nail, a supporting plate and the like. The specific working principle is as follows: the positioning pin can limit two degrees of freedom, the supporting plate can limit three degrees of freedom, in order to prevent the part from axially rotating in the drilling process, a supporting nail is required to limit the degree of freedom rotating around the Z rotating shaft, so far, six degrees of freedom of the process are completely limited, and a six-point positioning principle is met; the pressing plate and the fast locking nut play roles in fast clamping and loosening; the reversible drilling template and the pressure plate facilitate the loading and unloading of the workpiece; and when a workpiece is processed with one hole, the bolt of the positioner is pulled out, the index plate is rotated anticlockwise to the next hole position, and then the bolt is inserted, so that the next hole can be directly processed on the workpiece without repositioning. The utility model discloses be used for oil top to drive the turret work piece specially and use this process of processing hole, possible quick clamping work piece, it is accurate convenient during turned angle, positioning accuracy is high, and convenient operation satisfies parts machining's requirement, presss from both sides tightly reliably, and production efficiency is high.

Description

Special fixture for drilling process of top drive rotary head

Technical Field

The utility model relates to a work piece holder among the drilling process specifically is a special fixture of rotary head processing screw hole process is driven on top.

Background

The top drive is a novel petroleum drilling device, changes the traditional rotary table drilling mode and reduces the drilling cost and the labor intensity of workers. The top drive rotary head is an important part in a top drive device, the weight of the top drive rotary head reaches 450kg, a plurality of threaded holes are formed in the top drive rotary head, and the installation and the positioning in the machining process are always difficult to be troubled for manufacturers. Particularly, when 12 threaded holes in the upper surface of the rotary head are machined, the workpiece needs to be rotated by 30 degrees after each hole is machined, but the workpiece is heavy and cannot be moved randomly like a small part, the threaded holes are machined, the positioning accuracy of the holes is high, and once the deviation is large, the assembly of subsequent top drive and smooth production can be greatly influenced.

Disclosure of Invention

The utility model discloses to the defect in the above-mentioned technique, provide one kind can realize accurate location, fast loading and unloading work piece, quick replacement drill bit, quick accurate rotation angle's special fixture.

For solving the above problem, the utility model adopts the following technical scheme:

a special fixture for a drilling process, which can realize quick clamping and accurate positioning, comprises a base, a hand-pulling type positioner, an index plate, a support, a quick locking device, a pressing plate, a quick-change drill bushing, a drill plate, a positioning pin, a supporting nail, a supporting plate and the like. Install graduated disk, hand-pulling type locator and drill bushing support on the above-mentioned base, above-mentioned backup pad, locating pin, support nail, clamp plate, support and quick locking device all set up on the graduated disk, and above-mentioned quick locking device comprises pivot, support, nut and gasket. In addition, a nut is matched with the corresponding screw.

Wherein, the locating pin can restrict two degrees of freedom, and the backup pad can restrict three degree of freedom, in order to prevent that the part from taking place axial rotation at the in-process of drilling, still needs a support pin restriction to wind the rotatory degree of freedom of Z pivot, and six degrees of freedom of this process have been restricted completely so far, satisfy "six point location principle".

Design of the clamping device: the workpiece positioned by the revolution surface is clamped by an axial clamping mode, so that the workpiece is clamped by a mode of a pressure plate on the workpiece, the two nuts are used for locking when the pressure plate is locked, the nuts on two sides are only required to be unscrewed when the workpiece needs to be taken down, the auxiliary time can be saved, and the production efficiency can be improved.

Designing a tool setting guide device: since the workpiece is machined on a drill press, a drill plate, a drill bushing and a bushing for the drill bushing must be present in the fixture. Because this process does not involve the removal of drill bit, consequently choose for use fixed bushing plate can satisfy the processing demand.

When the tool setting device is installed, the drilling template and the pressing plate are firstly turned to a non-interference position, a crane is used for hanging the lifting lug of the rotary head to slowly place a workpiece on the fixture, the pressing plate is turned over to press the workpiece after positioning is finished, then the pressing plate is locked by the nut, and finally the drilling template is turned over to finish tool setting. When a hole is machined, the bolt of the positioner is pulled out, the index plate is rotated anticlockwise to the next hole position, and then the bolt is inserted, so that the next hole can be directly machined on the workpiece without repositioning. The clamping device has the advantages that the batch production is realized, the requirement of part processing is met, the clamping is reliable, and the processing precision and efficiency of workpieces are improved.

Among the above technical scheme, as the preferred, it has 2U type grooves to open on the base, makes things convenient for the anchor clamps body to fix a position and lock on the drilling machine workstation surface.

In the technical scheme, the base and the indexing disc are preferably connected through the bearing, so that the indexing disc is prevented from being in contact with the base to generate increased friction in the rotating process.

In the technical scheme, the press plate and the support and the drill plate and the support are preferably connected through the hinges formed by the bolts and the nuts, so that the workpiece is convenient to assemble and disassemble.

In the above technical scheme, as an optimization, a quick-change drill bushing is selected to facilitate the next processing procedure, and meanwhile, a bushing matched with the quick-change drill bushing and a corresponding drill bushing screw are also selected, so that in order to avoid overlong handle of the drill bit and ensure the rigidity and the coaxiality of the drill bit, the position of the drill bushing cannot be too far away from the processing surface.

In the above technical scheme, as preferred, adopt hand-pulling type locator, can pin graduated disk fast.

The utility model discloses simple structure is applicable to the small batch production of mill, satisfies parts machining's requirement, and it is reliable to press from both sides tight, and production efficiency is high. The utility model discloses can realize the quick clamping of work piece through upset bushing plate, clamp plate and quick locking device, reduce the assistance-time of drilling in-process through hand-pulling locator and graduated disk, improve machining efficiency, the use of cooperation quick change drill bushing has guaranteed the positioning accuracy who adds man-hour.

Drawings

The drawings used in the description are briefly described in order to explain the present invention and the overall flow of the operations in more detail.

Fig. 1 is a schematic perspective view of the special fixture for the top drive turret drilling process of the invention.

Fig. 2 is a schematic perspective view of another perspective view of the special fixture for the top drive turret drilling process in fig. 1.

Figure 3 is an assembly view of the clamp body after the workpiece has been installed.

Fig. 4 is a schematic perspective view of the hand-pulling type positioner.

Fig. 5 is a schematic perspective view of the tool setting guide device.

Wherein:

1. a base; 2. a hand-pulled positioner; 3. an index plate; 4. a support; 5. a quick locking device; 6. pressing a plate; 7. quickly replacing the drill bushing; 8. drilling a template; 9. positioning pins; 10. a support nail; 11. and a support plate.

Detailed Description

In order to make the technical means and the whole operation flow of the present invention more detailed and understood by those skilled in the art, the present invention is explained in more detail with reference to the accompanying drawings.

As shown in fig. 1, a special fixture 1 for drilling process and a base can realize fast clamping and accurate positioning; 2. a hand-pulled positioner; 3. an index plate; 4. a support; 5. a quick locking device; 6. pressing a plate; 7. quickly replacing the drill bushing; 8. drilling a template; 9. positioning pins; 10. a support pin; 11. and a support plate.

The method comprises the following specific use steps: turning the pressing plate 6 and the drilling template 7 upwards to a non-interference position, slowly placing the workpiece on the supporting plate 11 by using a crane, and adjusting and positioning; turning the back pressure plate 6 to press the workpiece tightly and locking the nut on the quick locking device 5 to complete the clamping of the workpiece, wherein the clamped assembly drawing is shown in fig. 3; turning the drill plate 7 back to finish tool setting and starting machining; after a hole is machined, the bolt of the hand-pulling type positioner 2 is pulled out, the index plate is rotated to the next hole position, the bolt is inserted back, the next hole can be machined, after all the holes are machined, the screw tap is replaced to start tapping, after the tapping is finished, the nut of the quick locking device 5 is loosened, the pressing plate 6 and the drill jig plate 7 are turned over, then the workpiece is lifted away from the workbench, and the machining of the working procedure is finished.

The basic principle and the main advantages of the present invention are shown above, and the present invention is designed with a practical angle, but the present invention is not limited to the above description, and should include various combinations according to the present invention. The protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (6)

1. The utility model provides a can realize accurate location, fast loading and unloading work piece, quick replacement drill bit, quick accurate rotation angle's top drive swivel head roughneck technology special fixture which characterized in that: this anchor clamps includes base, hand-pulling type locator, graduated disk, support, quick locking device, clamp plate, quick change drill bushing, bushing plate, locating pin, support nail, backup pad etc, the hand-pulling type locator cooperatees with the graduated disk, the location of work piece is realized to locating pin, backup pad, support nail installation on the graduated disk, clamp plate, lock nut, support and pivot cooperation use and accomplish the clamp of work piece tightly, bushing plate, quick change drill bushing, bush and drill bushing screw have constituted tool setting guiding device.

2. The fixture of claim 1, wherein: the indexing disc is provided with a pin hole which is matched with a bolt of the hand-pulling type positioner to complete the locking of the indexing disc.

3. The fixture of claim 1, wherein: the drill plate and the pressing plate are fixed on the support through bolts and nuts respectively to form hinged connection, and can be turned over by a certain angle, so that the workpiece can be conveniently hoisted.

4. The fixture of claim 1, wherein: the two ends of the rotating shaft are provided with threads which are matched with the bracket, the pressing plate and the nut to clamp the workpiece.

5. The fixture of claim 1, wherein: the index plate is provided with a positioning pin, a supporting plate and a supporting nail, so that 6 degrees of freedom of the workpiece are limited, and a six-point positioning principle is met.

6. The fixture of claim 1, wherein: open on the base has 2U type grooves, makes things convenient for the anchor clamps body to fix a position and lock on the drilling machine workstation surface.

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