A drilling jig

Abstract

The present invention discloses a drilling jig fixture, comprising: a base, a mandrel with an axis direction of a preset tilt angle rotatably provided on the base, a dividing mechanism for adjusting the rotation angle of the mandrel connected to the mandrel, a positioning device connected to the mandrel, the positioning device is used to clamp the upper end face and the lower end face of the positioning ring, and drive the positioning ring to rotate coaxially with the mandrel. The positioning ring is installed on the positioning device, and the positioning device is clamped on the upper end face and the lower end face of the positioning ring, so that the installation of the positioning ring can be more stable, and the positioning ring can be supported to prevent deformation of parts. In addition, the present invention can be applied to ordinary drilling machines, and the cost is lower than that of processing on a five-axis machining center.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing, and more specifically to a drilling jig fixture. Background Art

[0002] The 32 evenly distributed holes on the engine locating ring need to be processed by a five-axis machining center. The fixture is of conventional design, simple and easy to understand, and can meet the process requirements. However, the five-axis machining center equipment is in short supply, and the equipment processing cost is high, which is not conducive to controlling production costs and optimizing resources. In addition, the part is a thin-walled part (the wall thickness is only 2mm). Due to the large cutting force of five-axis machining and the milling cutter is 45° perpendicular to the machined surface, the outer wall thickness of the part is deformed, and the machined surface bulges upward.

[0003] In summary, how to prevent the outer wall thickness of parts from being deformed during machining and reduce costs is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a drilling jig fixture which can prevent the outer wall thickness of a part from being deformed when machining the part and reduce the cost.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A drilling jig fixture comprises: a base, on which is rotatably provided a core shaft with an axial direction having a preset inclination angle, the core shaft being connected to a dividing mechanism for adjusting the rotation angle of the core shaft, the core shaft being connected to a positioning device, the positioning device being used to clamp the upper end face and the lower end face of the positioning ring and drive the positioning ring to rotate coaxially with the core shaft.

[0007] Preferably, the base includes a horizontal plate at the bottom and an inclined plate arranged on the horizontal plate and having a preset inclination angle, and the inclined plate is provided with a sleeve perpendicular to the plate surface of the inclined plate and used to install the core shaft.

[0008] Preferably, the indexing mechanism comprises a dividing plate which is coaxially fixedly connected with the core shaft and has a plurality of dividing holes evenly distributed in the circumferential direction on its surface, the surface of the dividing plate is parallel to the surface of the inclined plate, a worm gear mechanism is provided on the base, the worm wheel of the worm gear mechanism is axially connected with a handle for driving the worm wheel to rotate, the rotation of the worm wheel is used to drive the worm of the worm gear mechanism to move linearly back and forth, so that a pin provided at one end of the worm gear is inserted into or pulled out of one of the indexing holes.

[0009] Preferably, a worm sleeve for axial movement of the worm is provided on the base, and an elastic member is provided on the end of the worm opposite to the latch.

[0010] Preferably, an end of the worm opposite to the latch is provided with an axial hole arranged along the axial direction of the worm, and a coil spring is inserted in the axial hole.

[0011] Preferably, a drill sleeve for guiding the drill bit to drill toward the surface to be processed of the positioning ring is provided on the base.

[0012] Preferably, the positioning device includes a supporting portion for fitting against the lower end surface of the positioning ring and a pressing portion for pressing the upper end surface of the positioning ring so that the positioning ring is pressed against the supporting portion, and the supporting portion is fixedly connected to the core shaft.

[0013] Preferably, the supporting portion includes a positioning body fixedly connected to the core shaft and a supporting ring mounted on the positioning body, the supporting ring is used to support the lower end surface of the surface to be processed of the positioning ring, the positioning body is used to support the axial lower end surface of the positioning ring, and a plurality of drill holes are provided on the annular surface of the support ring and the positioning ring in contact with each other, the angles of the plurality of drill holes relative to the axis of the support ring correspond one to one with the angles of the dividing hole relative to the axis of the dividing plate, and the axis of any one of the drill holes directly below the drill sleeve is collinear with the axis of the drill sleeve.

[0014] Preferably, the positioning body includes a shaft rod whose lower end is fixedly connected to the core shaft, and an annular step surface is provided on the outer periphery of the shaft rod, the annular step surface includes a first annular step surface for supporting the axial lower end surface of the positioning ring and a second annular step surface for installing the clamping part, and the clamping part is used to press the positioning ring against the first annular step surface.

[0015] Preferably, the clamping portion includes a nut and a pressure plate mounted on the second annular step surface, and an external thread that cooperates with the internal thread of the nut is provided on the outer periphery of the shaft rod facing upward along the second annular step surface. The nut can be axially adjusted to a position on the external thread to push the pressure plate to be pressed against the upper end surface of the positioning ring or leave the pressure plate.

[0016] The present invention provides a drilling jig fixture, comprising: a base, a core shaft rotatably provided on the base with an axial direction having a preset inclination angle, a dividing mechanism for adjusting the rotation angle of the core shaft connected to the core shaft, and a positioning device connected to the core shaft, the positioning device being used to clamp the upper end face and the lower end face of a positioning ring and drive the positioning ring to rotate coaxially with the core shaft.

[0017] The drilling jig provided by the present invention can be used for processing on an ordinary drilling machine. The base is placed on the workbench of the ordinary drilling machine. The preset angle of the core shaft can be adjusted according to the angle of the drill bit to adjust the angle of the positioning ring so that the processing surface of the positioning ring is perpendicular to the drill bit for processing. Since a positioning device is connected to the core shaft in the present invention, the positioning ring is installed on the positioning device, and the positioning device is clamped on the upper end face and the lower end face of the positioning ring, the installation of the positioning ring can be more stable, and the positioning ring can be supported to prevent deformation of the parts; in addition, since a dividing mechanism is provided on the core shaft, the rotation angle of the core shaft can be adjusted, and the positioning device can rotate with the core shaft to drive the positioning ring to rotate coaxially with the core shaft, and since a dividing mechanism is provided on the core shaft, after the core shaft is adjusted to rotate a certain angle, the positioning ring will also rotate a certain angle, so that the positioning ring can process evenly distributed holes.

[0018] The present invention stably installs the locating ring by clamping the upper and lower end faces of the locating ring, and supports the locating ring to prevent deformation of the locating ring. In addition, the present invention can be applied to an ordinary drilling machine and has lower cost than processing on a five-axis machining center. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of the drilling jig fixture provided by the present invention;

[0021] Figure 2 This is a cross-sectional view of the installation of the positioning ring provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the installation of the handle provided by the present invention;

[0023] Figure 4 A cross-sectional view of the worm gear mechanism provided by the present invention;

[0024] Figure 5 This is a partial enlarged view of the dividing plate provided by the present invention.

[0025] Figure 1-5 middle:

[0026] 1-slide rod, 2-drill sleeve, 3-round nut, 4-nut, 5-pressure plate, 6-positioning ring, 7-support ring, 8-indexing plate, 9-sleeve, 10-base, 11-core shaft, 12-drill template, 13-positioning body, 14-handle, 15-worm gear, 16-worm, 17-helical spring, 18-bushing, 19-pin, 20-indexing hole, 21-oil filling hole, 22-sealing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The core of the present invention is to provide a drilling jig fixture which can prevent the outer wall thickness of the part from being deformed during the processing of the part and reduce the cost.

[0029] Please refer to Figures 1 to 5 , Figure 1 A cross-sectional view of the drilling jig fixture provided by the present invention; Figure 2 This is a cross-sectional view of the installation of the positioning ring provided by the present invention; Figure 3 This is a schematic diagram of the installation of the handle provided by the present invention; Figure 4 A cross-sectional view of the worm gear mechanism provided by the present invention; Figure 5 This is a partial enlarged view of the dividing plate provided by the present invention.

[0030] A drilling jig fixture includes: a base 10, a core shaft 11 rotatably provided on the base 10 with an axial direction having a preset inclination angle, a dividing mechanism for adjusting the rotation angle of the core shaft 11 connected to the core shaft 11, and a positioning device connected to the core shaft 11, the positioning device is used to clamp the upper end face and the lower end face of the positioning ring 6, and drive the positioning ring 6 to rotate coaxially with the core shaft 11.

[0031] It should be noted that the positioning ring 6 includes a flat ring and a ring to be processed which is arranged along the outer circumference of the flat ring and has a certain angle with the flat ring. The inner ring of the ring to be processed is connected to the outer circumference of the flat ring. The ring to be processed is in the shape of an annular outer circumferential surface of a cone. Usually, the angle between the ring to be processed and the flat ring is 45°. The upper end face of the positioning ring 6 is the upper end face of the flat ring. The lower end face of the positioning ring 6 includes the lower end face of the flat ring and the inner ring face of the ring to be processed. The drill bit passes through the outer ring face of the ring to be processed to process the hole. Since the present invention can be applied to ordinary drilling machines for processing, the drill bit is installed on the spindle of the ordinary drilling machine, and the spindle is perpendicular to the drilling machine worktable, so the center line of each hole processed by the part must be perpendicular to the worktable. The shape of the worktable is a flat plate, and the bottom surface of the base 10 can be set to a plane, which can be stably placed on the worktable. At this time, the preset angle of the core shaft 11 can be 45° upward with respect to the bottom surface of the base 10, so that when the flat-plate circular ring of the positioning ring 6 and the coaxial sleeve 9 of the core shaft 11 are installed on the positioning device, the circular ring to be processed of the positioning ring 6 can be parallel to the worktable, that is, perpendicular to the drill bit.

[0032] Since the several through holes processed on the circular ring to be processed of the positioning ring 6 are evenly distributed on the ring surface of the circular ring to be processed, when adjusting the rotation angle of the core shaft 11, the dividing mechanism is used to rotate it in an equal rotation angle manner so that the angle of rotation of the core shaft 11 is equal each time, that is, the positioning ring 6 rotates coaxially with the core shaft 11 and the angles of rotation of the positioning ring 6 and the core shaft 11 are equal.

[0033] The drilling jig provided by the present invention can be used for processing on an ordinary drilling machine. The base 10 is placed on the workbench of the ordinary drilling machine. The preset angle of the core shaft 11 can be adjusted according to the angle of the drill bit to adjust the angle of the positioning ring 6, so that the processing surface of the positioning ring 6 is perpendicular to the drill bit for processing. Since a positioning device is connected to the core shaft 11 in the present invention, the positioning ring 6 is installed on the positioning device, and the positioning device is clamped on the upper end face and the lower end face of the positioning ring 6, the installation of the positioning ring 6 can be more stable, and the positioning ring 6 can be supported to prevent deformation of parts; in addition, since a dividing mechanism is provided on the core shaft 11, the rotation angle of the core shaft 11 can be adjusted, and the positioning device can rotate with the core shaft 11 to drive the positioning ring 6 to rotate coaxially with the core shaft 11, and since a dividing mechanism is provided on the core shaft 11, after the core shaft 11 is adjusted to rotate a certain angle, the positioning ring 6 will also rotate a certain angle, so that the positioning ring 6 can process evenly distributed holes.

[0034] The present invention stably installs the positioning ring 6 by clamping the upper and lower end faces of the positioning ring 6, and supports the positioning ring 6 to prevent the positioning ring 6 from deforming. In addition, the present invention can be applied to ordinary drilling machines, which is lower in cost than processing on a five-axis machining center.

[0035] On the basis of the above embodiment, the base 10 includes a horizontal plate at the bottom and an inclined plate arranged on the horizontal plate and having a preset inclination angle, and a sleeve 9 perpendicular to the plate surface of the inclined plate and used to install the mandrel 11 is provided on the inclined plate. The horizontal plate is a flat plate with a flat bottom surface, which can be placed on a workbench. The inclined plate and the horizontal plate are inclined upward at an angle of 45°. Since the mandrel 11 is 45° with the horizontal plate, when the sleeve 9 of the mandrel 11 is set, the axial direction of the sleeve 9 is perpendicular to the plate surface of the inclined plate, so that after the positioning ring 6 is installed on the mandrel 11, the annular surface of the positioning ring 6 to be processed can be perpendicular to the drill bit, which is convenient for drilling. The above structure is simple and easy to set up, and can ensure that when the annular surface to be processed is rotated to each angle, the annular surface to be processed directly below the drill bit is perpendicular to the drill bit, which can ensure the drilling angle.

[0036] On the basis of the above embodiment, the indexing mechanism includes a dividing plate 8 which is coaxially fixedly connected to the core shaft 11 and has a plurality of indexing holes 20 evenly distributed in the circumferential direction on its surface. The surface of the dividing plate 8 is parallel to the surface of the inclined plate. A worm gear mechanism is provided on the base 10. The worm wheel 15 of the worm gear mechanism is axially connected with a handle 14 for driving the worm wheel 15 to rotate. The rotation of the worm wheel 15 is used to drive the worm 16 of the worm gear mechanism to move back and forth in a straight line so that a pin 19 provided at one end of the worm 16 can be inserted into or pulled out of a dividing hole 20.

[0037] It should be noted that the indexing plate 8 is in the shape of a disk, and the axis of the indexing hole 20 is perpendicular to the disk surface of the indexing plate 8. Since the indexing plate 8 is coaxially fixedly connected to the mandrel 11, the disk surface of the indexing plate 8 is perpendicular to the axis of the mandrel 11, so the disk surface of the indexing plate 8 is parallel to the plate surface of the inclined plate to ensure that there is no friction between the indexing plate 8 and the base 10 when the indexing plate 8 rotates. The indexing holes 20 are evenly distributed on the indexing plate 8, and the number of holes of the indexing plate 8 can be determined according to the number of holes on the positioning ring 6 that need to be processed. The number of holes that need to be processed on the positioning ring 6 is consistent with the number of indexing holes 20. Since the indexing plate 8 rotates synchronously with the mandrel 11, and the mandrel 11 rotates synchronously with the positioning ring 6, the indexing plate 8 and the positioning ring 6 rotate synchronously.

[0038] The outer end of the worm wheel 15 is connected to a handle 14, and the handle 14 can drive the worm wheel 15 to rotate. When the worm wheel 15 is driven to rotate forward and backward, the worm 16 installed in conjunction with the worm wheel 15 can perform linear reciprocating motion. For example, the handle 14 is used to drive the worm wheel 15 to rotate clockwise, and the latch 19 set on the worm 16 is pulled out of the indexing hole 20, and the indexing plate 8 is rotated to make the indexing hole 20 adjacent to the indexing hole 20 pulled out by the worm 16 align with the latch 19; the handle 14 is used to drive the worm wheel 15 to rotate counterclockwise, and the latch 19 set on the worm 16 is inserted into the indexing hole 20 corresponding to the latch 19, thereby completing the indexing rotation of the positioning ring 6.

[0039] This embodiment uses a worm gear mechanism to index the positioning ring 6, which is convenient for installation, processing and operation, and the indexing is accurate.

[0040] On the basis of the above embodiment, a worm sleeve is provided on the base 10 for the axial movement of the worm 16, and an elastic member is provided on the end of the worm 16 opposite to the latch 19. The worm sleeve is used to provide a moving place for the worm 16, and a bushing 18 for reducing friction can be provided between the worm sleeve and the worm 16. The elastic member provided at the other end of the worm 16 can provide elastic force to the axial direction of the worm 16. When the handle 14 drives the worm 16 to leave the indexing hole 20, the elastic force increases. After the indexing plate 8 is rotated, the worm 16 can be pushed toward the indexing hole 20 under the action of the elastic force, so that the latch 19 is inserted into the indexing hole 20, and under the action of the elastic member, it can be ensured that the latch 19 can always be inserted into the indexing hole 20 without being driven by the handle 14.

[0041] On the basis of the above embodiment, regarding the arrangement of the elastic member, preferably, the end of the worm 16 opposite to the latch 19 is provided with an axial hole arranged along the axial direction of the worm 16, and a coil spring 17 is inserted into the axial hole. One end of the coil spring 17 is inserted into the axial hole and abuts against the bottom surface of the axial hole, and the other end abuts against the inner wall of the shaft sleeve 9 opposite to the axial hole, thereby generating elastic force. The coil spring 17 has a good axial force, which can ensure that the worm 16 is subjected to axial force.

[0042] On the basis of the above embodiment, in order to facilitate guiding the drill bit to point to the surface to be processed of the positioning ring 6, a drill sleeve 2 for guiding the drill bit to drill to the surface to be processed of the positioning ring 6 is provided on the base 10. The drill bit is inserted into the drill sleeve 2, and the drill sleeve 2 is hinged to the upper part of the inclined plate through the drilling template 12. When drilling is required, the drill sleeve 2 is lowered and aligned with the positioning ring 6, and then the drill bit is operated to pass through the drill sleeve 2.

[0043] On the basis of the above embodiment, the positioning device includes a support portion for fitting to the lower end surface of the positioning ring 6 and a pressing portion for pressing the upper end surface of the positioning ring 6 so that the positioning ring 6 is pressed against the support portion, and the support portion is fixedly connected to the mandrel 11. The positioning device can fix the positioning ring 6 from two directions, the support portion is fixedly connected to the mandrel 11 and can rotate synchronously, and the pressing portion can be connected to the support portion so that the two clamp the positioning ring 6.

[0044] Preferably, the supporting portion includes a positioning body 13 fixedly connected to the core shaft 11 and a supporting ring 7 mounted on the positioning body 13, the supporting ring 7 is used to support the lower end surface of the surface to be processed of the positioning ring 6, the positioning body 13 is used to support the axial lower end surface of the positioning ring 6, and a plurality of drill holes are provided on the annular surface where the support ring 7 and the positioning ring 6 are in contact, and the angles of the plurality of drill holes relative to the axis of the support ring 7 correspond one by one to the angles of the dividing hole 20 relative to the axis of the dividing plate 8, and the axis of any drill hole directly below the drill sleeve 2 is collinear with the axis of the drill sleeve 2.

[0045] It should be noted that the axial lower end face of the positioning body 13 is the lower end face of the flat circular ring and the lower end face of the surface to be processed in the above content, the surface to be processed is the surface of the circular ring to be processed, and the lower end face is the inner side face of the circular ring to be processed. When a borehole on the support ring 7 rotates to the bottom of the drill bit, the drill bit drills downward on the positioning ring 6, and the drill bit cuts off the part of the positioning ring 6 that needs to be processed. This part falls through the borehole below to complete the drilling, and because the angles of several boreholes relative to the axis of the support ring 7 correspond to the angles of the dividing hole 20 relative to the axis of the dividing plate 8, when the dividing plate 8 rotates through the angle of one hole, the borehole also rotates through the angle of one hole, and the line connecting the borehole and the dividing hole 20 passes through the axis of the dividing plate 8, so that the angle between adjacent boreholes is equal to the angle between adjacent dividing holes 20. The drilling position of the support ring 7 provided in this embodiment is clearly visible and easy to adjust.

[0046] On the basis of the above embodiment, the positioning body 13 includes a shaft rod whose lower end is fixedly connected to the core shaft 11, and an annular step surface is provided on the outer periphery of the shaft rod. The annular step surface includes a first annular step surface for supporting the axial lower end surface of the positioning ring 6 and a second annular step surface for installing a clamping part, and the clamping part is used to clamp the positioning ring 6 against the first annular step surface.

[0047] It should be noted that the shaft rod is coaxially connected to the core shaft 11, the support ring 7 is mounted on the shaft rod below the first annular step surface, and a strip hole is provided on the shaft rod below the support ring 7. The opening direction of the strip hole is toward the radial direction of the shaft rod, and the length direction of the strip hole is arranged along the radial direction of the shaft rod.

[0048] A through groove is provided axially downward along the center axis of the upper end of the shaft rod, a strip hole is opened on the side wall of the through groove, a slide rod 1 is inserted in the through groove, a cylindrical pin passing through the strip hole is provided at the lower end of the slide rod 1, and the length direction of the cylindrical pin is consistent with the opening direction of the strip hole. The cylindrical pin can slide in the strip hole driven by the slide rod 1, and the slide rod 1 can slide axially along the through groove.

[0049] The cylindrical pin extends out of the strip hole and rests on the lower end surface of the support ring 7. A round nut 3 is provided at the upper end of the slide rod 1. The round nut 3 can move toward the second annular step surface to provide a clamping force, so that the clamping part is pressed against the second annular step surface. After the round nut 3 moves toward the second annular step surface until it cannot move axially, the slide rod 1 will slide upward along the axial direction under the action of the thread. At this time, the cylindrical pin will move upward to clamp the support ring 7, and the support ring 7 will be pressed against the bottom surface of the first annular step surface. The structure provided in this embodiment can stably fix the positioning ring 6, will not move during the processing, and can prevent the positioning ring 6 from deformation.

[0050] On the basis of the above embodiment, the clamping part includes a nut 4 and a pressure plate 5 mounted on the second annular step surface. An external thread that cooperates with the internal thread of the nut 4 is provided on the outer periphery of the shaft rod facing upward along the second annular step surface. The nut 4 can be axially adjusted to a position on the external thread to push the pressure plate 5 to be pressed against the upper end surface of the positioning ring 6, or to leave the pressure plate 5.

[0051] It should be noted that the clamping portion is arranged between the round nut 3 and the second annular step surface, a washer is arranged on the shaft above the pressing plate 5, the nut 4 is pressed against the washer and transmits the clamping force to the pressing plate 5, and a circular washer is also arranged between the round nut 3 and the nut 4, which can disperse the transmitted clamping force to the pressing plate 5, so that the pressing plate 5 can be pressed against the positioning ring 6. This embodiment has a simple structure and strong operability.

[0052] When the jig is working, cutting fluid and iron cutting are generated, and in order to prevent the surrounding dust from entering the jig, a sealing ring 22 is designed on the indexing plate 8. An oil filling hole 21 is designed on the indexing plate to facilitate regular oil filling, so that the indexing plate 8 can rotate flexibly during work. The oil filling can be carried out by unscrewing the screw in the oil filling hole 21.

[0053] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above is a detailed introduction to the drilling jig fixture provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A drilling jig fixture, characterized in that: include: A base (10), wherein the base (10) is rotatably provided with a core shaft (11) whose axial direction is a preset tilt angle, the core shaft (11) is connected to a dividing mechanism for adjusting the rotation angle of the core shaft (11), and the core shaft (11) is connected to a positioning device, the positioning device is used to clamp the upper end face and the lower end face of the positioning ring (6), and drive the positioning ring (6) to rotate coaxially with the core shaft (11); The base (10) comprises a horizontal plate at the bottom and an inclined plate arranged on the horizontal plate and having a preset inclination angle, wherein the inclined plate is provided with a shaft sleeve (9) perpendicular to the plate surface of the inclined plate and used for mounting the core shaft (11); The indexing mechanism comprises a dividing plate (8) which is coaxially fixedly connected with the core shaft (11) and has a plurality of dividing holes (20) uniformly distributed in a circumferential direction on its surface, the surface of the dividing plate (8) being parallel to the surface of the inclined plate, a worm gear mechanism being provided on the base (10), a handle (14) being used to drive the worm gear (15) to rotate being axially connected to the worm wheel (15) of the worm gear mechanism, the rotation of the worm wheel (15) being used to drive the worm (16) of the worm gear mechanism to move back and forth linearly, so that a latch (19) provided at one end of the worm gear (16) is inserted into or withdrawn from one of the dividing holes (20); The base (10) is provided with a drill sleeve (2) for guiding the drill bit to drill toward the surface to be processed of the positioning ring (6); The positioning device comprises a supporting portion for fitting to the lower end surface of the positioning ring (6) and a pressing portion for pressing the upper end surface of the positioning ring (6) so that the positioning ring (6) is pressed against the supporting portion, and the supporting portion is fixedly connected to the core shaft (11); The support portion comprises a positioning body (13) fixedly connected to the core shaft (11) and a support ring (7) sleeved on the positioning body (13), the support ring (7) being used to support the lower end surface of the surface to be processed of the positioning ring (6), the positioning body (13) being used to support the axial lower end surface of the positioning ring (6), a plurality of drill holes are provided on the annular surface of the support ring (7) and the positioning ring (6) being in contact with each other, the angles of the plurality of drill holes relative to the axis of the support ring (7) and the angles of the dividing hole (20) relative to the axis of the dividing plate (8) being one-to-one corresponding, and the axis of any one of the drill holes located directly below the drill sleeve (2) is collinear with the axis of the drill sleeve (2); The positioning body (13) comprises a shaft whose lower end is fixedly connected to the core shaft (11), and an annular step surface is provided on the outer periphery of the shaft, wherein the annular step surface comprises a first annular step surface for supporting the axial lower end surface of the positioning ring (6) and a second annular step surface for mounting the clamping portion, wherein the clamping portion is used to clamp the positioning ring (6) against the first annular step surface; The support ring (7) is sleeved on the shaft below the first annular step surface, a strip hole is provided on the shaft below the support ring (7), a through groove is provided axially downward along the center axis of the upper end of the shaft, the strip hole is opened on the side wall of the through groove, a slide rod (1) is inserted in the through groove, and a cylindrical pin passing through the strip hole is provided at the lower end of the slide rod (1); A round nut (3) is provided at the upper end of the slide rod (1), and the round nut (3) can move toward the second annular step surface to provide a clamping force, so that the clamping part is pressed against the second annular step surface, and after the round nut (3) moves toward the second annular step surface until it cannot move axially, the slide rod (1) will slide axially upward under the action of the thread, so that the cylindrical pin will move upward to press the support ring (7), and the support ring (7) will be pressed against the bottom surface of the first annular step surface.

2. The drilling jig fixture according to claim 1, characterized in that: The base (10) is provided with a worm sleeve for axial movement of the worm (16), and an elastic member is provided on the end of the worm (16) opposite to the latch (19).

3. The drilling jig fixture according to claim 2, characterized in that: An end of the worm (16) opposite to the latch (19) is provided with an axial hole arranged along the axial direction of the worm (16), and a coil spring (17) is inserted into the axial hole.

4. The drilling jig fixture according to claim 3, characterized in that: The clamping portion comprises a nut (4) and a pressure plate (5) mounted on the second annular step surface. An external thread that cooperates with the internal thread of the nut (4) is provided on the outer periphery of the shaft rod facing upward along the second annular step surface. The nut (4) can be axially adjusted to a position on the external thread so as to push the pressure plate (5) to be pressed against the upper end surface of the positioning ring (6) or to leave the pressure plate (5).

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