Drill positioning jig

Abstract

The utility model relates to drill chuck technology field, is a drill positioning fixture, including base, work rotary table, index machine, translation assembly, open-close type air claw and positioning pin, the upper side of base is installed with work rotary table, the upper side of work rotary table is installed with fixed platform. The utility model is reasonable and compact in structure, when using, the handle portion of drill is fixed in the main shaft of index machine, through work rotary table, can adjust the included angle of drill axis and grinding wheel in horizontal plane, thereby adjust the top angle after drill grinding, through the reduction motor, can make the drill blade swing up and down, thereby adjust the back angle after drill grinding, through setting the pilot head, the pilot head is close to each other under the action of open-close type air claw and is located in the spiral groove of drill after clamping drill, can have the positioning effect to the drill with spiral groove, prevent the drill blade from rotating in the grinding process like this, can promote the efficiency and the grinding accuracy of drill blade in the grinding process of drill blade.

Description

Technical Field

[0001] This utility model relates to the field of drill bit clamping technology, and is a drill bit positioning clamp. Background Technology

[0002] Drill bits are a common cutting and drilling tool in machining, characterized by high hardness and high wear resistance. After prolonged drilling, the cutting edge of the drill bit will gradually wear down, resulting in a loss of drilling accuracy. Therefore, after repeated use, the cutting edge of the drill bit needs to be sharpened to improve its accuracy and service life.

[0003] The quality of drill bit sharpening directly affects drilling quality, processing efficiency, and the lifespan of bricks. Currently, drill bit sharpening is mainly done by hand on a grinding wheel. This method poses significant safety hazards. During sharpening, the grinding wheel can easily injure fingers; furthermore, due to hand movement, it is difficult to control the amount and angle of sharpening, leading to large deviations in the drill bit's point and clearance angles, which in turn affects drilling quality and the lifespan of the drill bit.

[0004] Chinese patent document CN207858461U discloses a drill bit sharpening device, which includes a sleeve, a rotating sleeve, a clamp, a support rod, and a rotating rod. Both ends of the support rod are fixedly connected to the clamp and the rotating sleeve, respectively. One end of the rotating rod is inserted into the rotating sleeve, and the other end is fixedly connected to the sleeve. Multiple guide screws are installed on the sleeve. The device also includes a sharpening angle limiting device, which comprises a sliding sleeve mounted on the support rod. A U-shaped plate is fixed to one end of the sliding sleeve, and a limiting rod is fixed to one end of the rotating rod, the limiting rod being located within the U-shaped plate.

[0005] Chinese patent document CN210435843U discloses a drill bit sharpening and positioning assembly, which includes a clamp for clamping the drill bit and an angle grinder protective shell for mounting on an angle grinder and cooperating with the clamp. The clamp includes two clamping blocks and a clamping mechanism that moves the two clamping blocks relative to each other to clamp them. The adjacent sides of the two clamping blocks are provided with main V-shaped positioning grooves. The lower end surfaces of the two clamping blocks are respectively provided with sliding parts. The two sliding parts are gradually inclined to the right and left from top to bottom so that the lower ends of the two sliding parts are close to each other. The gap between the two sliding parts forms a clearance channel for avoiding the drill bit. The angle grinder protective shell includes a shell, on which a groove is provided radially to slide with the sliding parts. The outer inclined surface of the sliding part is a sliding surface that contacts and slides with the bottom of the groove. The bottom of the groove is provided with a clearance opening for the drill bit to pass through the bottom of the groove to contact the grinding wheel for grinding.

[0006] When grinding a drill bit on a grinding machine, it must first be fixed to prevent it from shifting during grinding, which could damage the cutting edge. Existing drill bit grinding fixtures generally use bolts to press the drill bit side to fix it. This method has poor positioning effect, and the drill bit will still vibrate and shift during grinding, which can easily affect the grinding accuracy of the drill bit. Summary of the Invention

[0007] This utility model provides a drill bit positioning fixture that overcomes the shortcomings of the prior art. It can effectively solve the problem that the existing drill bit grinding fixture has poor positioning effect and easily affects the grinding accuracy of the drill bit.

[0008] The technical solution of this utility model is achieved through the following measures: A drill bit positioning fixture includes a base, a working turntable, an indexing machine, a translation component, an opening and closing pneumatic gripper, and positioning pins. The working turntable is installed on the upper side of the base, and a fixed platform is installed on the upper side of the working turntable. A shaft seat is fixedly installed on the upper side of the fixed platform, and a geared motor is fixedly installed on the rear side of the shaft seat. The front end of the output shaft of the geared motor passes through the shaft seat and is fixedly installed with a connecting plate. An indexing machine is provided in front of the connecting plate, and a translation component is provided in front of the connecting plate to enable the indexing machine to reciprocate along the radial direction of the output shaft of the geared motor. An opening and closing pneumatic gripper is fixedly installed on the upper right side of the indexing machine. Positioning claws are fixedly installed on both fingers of the opening and closing pneumatic gripper, and positioning pins are fixedly installed on the lower sides of the two positioning claws that are close to each other. The two positioning pins are symmetrically distributed about the central axis of the indexing machine spindle.

[0009] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0010] Both of the aforementioned locating pins have guide heads at their close ends, with the outer surface of the guide head being a spherical cap surface.

[0011] The aforementioned translation assembly may include a support plate, a slide rail, an adjusting screw, and a fixed base. The rear right side of the support plate is fixedly installed together with the front side of the connecting plate. A slide rail is fixedly installed on the front middle side of the support plate. The cross-section of the slide rail gradually narrows from front to back. The front side of the fixed base is fixedly installed together with the rear side of the indexing machine. A sliding groove that runs through the left and right sides and matches the slide rail is provided on the rear side of the fixed base. The slide rail is slidably installed in the sliding groove. An adjusting plate is fixedly installed on the left side of the support plate. A rotating groove that runs through the left and right sides is provided on the front side of the adjusting plate. An adjusting screw hole is provided on the left side of the fixed base corresponding to the position of the rotating groove. An adjusting screw is rotatably installed in the rotating groove. The right side of the adjusting screw is screwed into the adjusting screw hole.

[0012] A first connecting seat can be fixedly installed on the right rear part of the indexing machine. A guide sleeve is fixedly installed on the front part of the first connecting seat. The guide sleeve is located between the right end of the indexing machine spindle and the left side of the positioning claw.

[0013] The indexing machine can be fixedly installed on the upper right side. The upper side of the second connecting seat is provided with two guide grooves that are open to the left and right and have upward openings. The guide grooves are inverted T-shaped with narrow top and wide bottom. The upper side of the openable and closed pneumatic gripper corresponding to each guide groove position is provided with a connecting hole that is open to the top and bottom. Each guide groove is provided with a connecting screw rod with a nut screwed on after the upper end passes through the corresponding connecting hole.

[0014] This utility model has a reasonable and compact structure. In use, the shank of the drill bit is fixed inside the spindle of the indexing machine. The positioning pins, under the action of the opening and closing air grippers, respectively abut against the two spiral grooves of the drill bit. The base is fixedly installed in front of the grinding wheel. Through the worktable, the angle between the drill bit axis and the grinding wheel in the horizontal plane can be adjusted, thereby adjusting the tip angle of the drill bit after grinding. Through the reduction motor, the drill bit edge can be swung up and down, thereby adjusting the back angle of the drill bit after grinding. By setting guide heads, the guide heads approach each other under the action of the opening and closing air grippers and clamp the drill bit in the spiral groove, which can achieve a positioning effect for drill bits with spiral grooves. This prevents the drill bit edge from rotating during the grinding process, thereby improving the efficiency and grinding accuracy of the drill bit edge. Attached Figure Description

[0015] Appendix Figure 1 These are schematic diagrams of the main structure of embodiments one to five of this utility model.

[0016] Appendix Figure 2 This is a right-side structural schematic diagram of embodiments one to five of this utility model.

[0017] Appendix Figure 3 This is a top view of the structure of embodiments one to five of this utility model.

[0018] Appendix Figure 4 This is a three-dimensional structural diagram of embodiments one to five of this utility model. Figure 1 .

[0019] Appendix Figure 5 This is a three-dimensional structural diagram of embodiments one to five of this utility model. Figure 2 .

[0020] Appendix Figure 6 This is a three-dimensional structural diagram of embodiments one to five of this utility model. Figure 3 .

[0021] Appendix Figure 7 This is a right-side cross-sectional view of the opening and closing type pneumatic gripper in embodiments one to five of this utility model.

[0022] Appendix Figure 8 This is a top sectional view of the indexing machine in Embodiments 1 to 5 of this utility model.

[0023] Appendix Figure 9This is a three-dimensional structural diagram of the indexing machine in Embodiments 1 to 5 of this utility model.

[0024] Appendix Figure 10 For the appendix Figure 9 A magnified structural diagram of point A in the middle.

[0025] The codes in the attached diagram are as follows: 1 is the base, 2 is the turntable, 3 is the indexing machine, 4 is the opening and closing pneumatic gripper, 5 is the positioning pin, 6 is the fixed platform, 7 is the shaft seat, 8 is the geared motor, 9 is the connecting plate, 10 is the guide head, 11 is the support plate, 12 is the slide rail, 13 is the adjusting screw, 14 is the fixed seat, 15 is the adjusting plate, 16 is the rotating groove, 17 is the first connecting seat, 18 is the guide sleeve, 19 is the second connecting seat, 20 is the guide groove, 21 is the connecting screw, and 22 is the positioning gripper. Detailed Implementation

[0026] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0027] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0029] Example 1: As shown in the attached document Figures 1 to 10 As shown, the drill bit positioning fixture includes a base 1, a working turntable 2, an indexing machine 3, a translation component, an opening and closing pneumatic gripper 4, and positioning pins 5. The working turntable 2 is mounted on the upper side of the base 1, and a fixed platform 6 is mounted on the upper side of the working turntable 2. A bearing seat 7 is fixedly mounted on the upper side of the fixed platform 6, and a geared motor 8 is fixedly mounted on the rear side of the bearing seat 7. The front end of the output shaft of the geared motor 8 passes through the bearing seat 7 and is fixedly mounted on a connecting plate 9. The indexing machine 3 is located in front of the connecting plate 9, and a translation component is located in front of the connecting plate 9 to allow the indexing machine 3 to reciprocate along the radial direction of the output shaft of the geared motor 8. An opening and closing pneumatic gripper 4 is fixedly mounted on the upper right side of the indexing machine 3. Positioning claws 22 are fixedly mounted on both fingers of the opening and closing pneumatic gripper 4, and positioning pins 5 are fixedly mounted on the lower sides of the two positioning claws 22 that are close to each other. The two positioning pins 5 are symmetrically distributed about the central axis of the main shaft of the indexing machine 3.

[0030] Depending on the requirements, the opening and closing type pneumatic gripper 4 is a known prior art, such as a 180-degree opening and closing pneumatic finger cylinder disclosed in Chinese patent document CN204300017U, or a parallel opening and closing type finger cylinder, or a compound Y-type pneumatic finger. In this embodiment, the opening and closing type pneumatic gripper 4 is a 180-degree gear-type finger cylinder-MHW2. The working turntable 2 is a known prior art, such as an S08-AM8 servo motor and an HC90HP hydraulic turntable connected together (the output shaft of the S08-AM8 servo motor and the input shaft of the HC90HP hydraulic turntable are connected together). The geared motor 8 is a known prior art, such as an S08-AM6 servo motor and a JDLB worm gear reducer connected together (the output shaft of the S08-AM6 servo motor and the input shaft of the JDLB worm gear reducer are connected together via a coupling). The right side of the output shaft of the geared motor 8 is rotatably mounted in the bearing seat 7. The indexing machine 3 is a known prior art electric indexing head.

[0031] In use, the shank of the drill bit is fixed inside the spindle of the indexing machine 3. The positioning pins 5, under the action of the opening and closing air grippers 4, respectively abut against the two spiral grooves of the drill bit. The base 1 is fixedly installed in front of the grinding wheel. The angle between the drill bit axis and the grinding wheel in the horizontal plane can be adjusted by the working turntable 2, thereby adjusting the tip angle of the drill bit after grinding. The drill bit edge can be swung up and down by the reduction motor 8 and the working turntable 2, thereby adjusting the back angle of the drill bit after grinding. By setting the guide head 10, the guide head 10 approaches each other under the action of the opening and closing air grippers 4 and clamps the drill bit in the spiral groove. This can achieve a positioning effect for the drill bit with spiral grooves, thus preventing the drill bit edge from rotating during the grinding process, which can improve the efficiency and grinding accuracy of the drill bit edge.

[0032] The above-mentioned drill bit positioning fixture can be further optimized and / or improved according to actual needs:

[0033] Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 9 As shown in Figures 1 and 10, the ends of the two locating pins 5 that are close to each other each have guide heads 10, and the outer surface of the guide heads 10 is a spherical cap surface.

[0034] As required, the rear end of the front locating pin 5 has a spherical crown-shaped guide head 10. The rear part of the front guide head 10 and the front part of the front locating pin 5 are connected by a conical surface that is larger at the front and smaller at the rear. Similarly, the front end of the rear locating pin 5 has a spherical crown-shaped guide head 10, and the front part of the rear guide head 10 and the rear part of the rear locating pin 5 are connected by a conical surface that is smaller at the front and larger at the rear. During use, the guide head 10 allows it to fit better against the inner wall of the drill bit's spiral groove. This ensures that the guide heads 10 can clamp the drill bit tightly when they come close together, preventing the drill bit from loosening during grinding.

[0035] Example 3: As an optimization of the above examples, as shown in the appendix. Figures 1 to 7 As shown in Figure 9, the translation assembly includes a support plate 11, a slide rail 12, an adjusting screw 13, and a fixed base 14. The rear right side of the support plate 11 is fixedly installed together with the front side of the connecting plate 9. The slide rail 12 is fixedly installed on the front middle part of the support plate 11. The cross-section of the slide rail 12 gradually narrows from front to back. The front side of the fixed base 14 is fixedly installed together with the rear side of the indexing machine 3. The rear side of the fixed base 14 is provided with a sliding groove that runs through the left and right sides and matches the slide rail 12. The slide rail 12 is slidably installed in the sliding groove. An adjusting plate 15 is fixedly installed on the left side of the support plate 11. The front side of the adjusting plate 15 is provided with a rotating groove 16 that runs through the left and right sides. The left side of the fixed base 14 corresponding to the position of the rotating groove 16 is provided with an adjusting screw hole. The adjusting screw 13 is rotatably installed in the rotating groove 16. The right side of the adjusting screw 13 is screwed into the adjusting screw hole.

[0036] According to requirements, both the slide rail 12 and the slide groove have a trapezoidal cross-section that is wider at the front and narrower at the back (isosceles trapezoid, i.e., dovetail structure). A limiting ring is fixed to the outside of the adjusting screw 13 on the right side of the adjusting plate 15. The right end of the head of the adjusting screw 13 is in contact with the left side of the adjusting plate 15. The rotating groove 16 is U-shaped with an opening facing forward, which facilitates the disassembly and assembly of the adjusting screw 13. After rotating the adjusting screw 13, the fixed seat 14 can move left and right. During use, the shank of the drill bit is fixed in the spindle of the indexing machine 3. By rotating the adjusting screw 13, the fixed seat 14 and the indexing machine 3 can move left and right along the slide rail 12. This allows the distance between the drill bit edge and the grinding wheel to be adjusted according to different lengths of drill bits, enabling rapid grinding of batches of drill bit edges of different specifications and improving grinding efficiency.

[0037] Example 4: As an optimization of the above examples, as shown in the appendix. Figures 1 to 10 As shown, a first connecting seat 17 is fixedly installed on the right rear side of the indexing machine 3, and a guide sleeve 18 is fixedly installed on the front of the first connecting seat 17. The guide sleeve 18 is located between the right end of the main shaft of the indexing machine 3 and the left side of the positioning claw 22.

[0038] According to the requirements, the front left side of the first connecting seat 17 is provided with a through hole that runs from front to back. The outer left side of the guide sleeve 18 is fitted into the through hole. The rear of the first connecting seat 17 is provided with a fixing screw hole that communicates with the through hole. A fixing bolt with its front end abutting against the outer side of the guide sleeve 18 is screwed into the fixing screw hole. Tightening the fixing bolt makes the central axis of the guide sleeve 18 collinear with the central axis of the spindle of the indexing machine 3. In this way, a matching guide sleeve 18 can be selected according to different specifications of drill bits. When it is not possible to use the positioning pin 5 for positioning of deep hole drills or other drill bits, such as tapered hole drill bits, the guide sleeve 18 can be used for positioning. This allows the drill bit to be positioned during the grinding process of various drill bit edges, which can increase the scope of application.

[0039] Example 5: As an optimization of the above examples, as shown in the appendix. Figures 1 to 5 As shown in Figures 7 and 9, a second connecting seat 19 is fixedly installed on the upper right side of the indexing machine 3. The upper side of the second connecting seat 19 is provided with two guide grooves 20 that are open to the left and right and open upward. The guide grooves 20 are inverted T-shaped, narrow at the top and wide at the bottom. The upper side of the openable and closed pneumatic gripper 4 corresponding to the position of each guide groove 20 is provided with a connecting hole that is open to the top and bottom. Each guide groove 20 is provided with a connecting screw 21 whose upper end passes through the corresponding connecting hole and is screwed with a nut.

[0040] Depending on the requirements, the connecting screw 21 can be a hexagonal head bolt or a T-slot bolt. During use, the second connecting seat 19 facilitates the disassembly and assembly of the openable / closed pneumatic gripper 4, and also facilitates the installation of other drill bit grinding positioners, such as the drill bit grinding positioner disclosed in Chinese Patent Document CN208467939U, or a drill bit grinding positioner with ultra-high hardness disclosed in Chinese Patent Document CN210909527U. This improves the compatibility between the indexing machine 3 and the positioning mechanism.

[0041] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A drill bit positioning fixture, characterized in that... The system includes a base, a turntable, an indexing machine, a translation component, an opening / closing pneumatic gripper, and positioning pins. The turntable is mounted on the upper side of the base, and a fixed platform is mounted on the upper side of the turntable. A bearing seat is fixedly mounted on the upper side of the fixed platform, and a geared motor is fixedly mounted on the rear side of the bearing seat. The output shaft of the geared motor passes through the bearing seat and is fixedly mounted on a connecting plate. The indexing machine is located in front of the connecting plate, and a translation component is located in front of the connecting plate, which enables the indexing machine to reciprocate along the radial direction of the output shaft of the geared motor. An opening / closing pneumatic gripper is fixedly mounted on the upper right side of the indexing machine. Positioning claws are fixedly mounted on both fingers of the opening / closing pneumatic gripper, and positioning pins are fixedly mounted on the lower sides of the two positioning claws that are close to each other. The two positioning pins are symmetrically distributed about the central axis of the indexing machine spindle.

2. The drill bit positioning fixture according to claim 1, characterized in that... The two locating pins have guide heads at their close ends, and the outer surface of the guide heads is a spherical cap surface.

3. The drill bit positioning fixture according to claim 1 or 2, characterized in that... The translation assembly includes a support plate, a slide rail, an adjusting screw, and a fixed base. The rear right side of the support plate is fixedly installed with the front side of the connecting plate. A slide rail is fixedly installed on the front middle side of the support plate. The cross-section of the slide rail gradually narrows from front to back. The front side of the fixed base is fixedly installed with the rear side of the indexing machine. The rear side of the fixed base has a through-groove that matches the slide rail. The slide rail is slidably installed in the through-groove. An adjusting plate is fixedly installed on the left side of the support plate. A rotating groove that runs through the left and right sides is provided on the front side of the adjusting plate. An adjusting screw hole is provided on the left side of the fixed base corresponding to the position of the rotating groove. An adjusting screw is rotatably installed in the rotating groove. The right side of the adjusting screw is screwed into the adjusting screw hole.

4. The drill bit positioning fixture according to claim 1 or 2, characterized in that... A first connecting seat is fixedly installed on the right rear part of the indexing machine, and a guide sleeve is fixedly installed on the front part of the first connecting seat. The guide sleeve is located between the right end of the indexing machine spindle and the left side of the positioning claw.

5. The drill bit positioning fixture according to claim 3, characterized in that... A first connecting seat is fixedly installed on the right rear part of the indexing machine, and a guide sleeve is fixedly installed on the front part of the first connecting seat. The guide sleeve is located between the right end of the indexing machine spindle and the left side of the positioning claw.

6. The drill bit positioning fixture according to claim 1, 2, or 5, characterized in that... A second connecting seat is fixedly installed on the upper right side of the indexing machine. The upper side of the second connecting seat has two guide grooves that are open from left to right and open upward. The guide grooves are inverted T-shaped, narrow at the top and wide at the bottom. The upper side of the openable pneumatic gripper corresponding to each guide groove position has a connecting hole that is open from top to bottom. Each guide groove has a connecting screw with a nut screwed into it after the upper end passes through the corresponding connecting hole.

7. The drill bit positioning fixture according to claim 3, characterized in that... A second connecting seat is fixedly installed on the upper right side of the indexing machine. The upper side of the second connecting seat has two guide grooves that are open from left to right and open upward. The guide grooves are inverted T-shaped, narrow at the top and wide at the bottom. The upper side of the openable pneumatic gripper corresponding to each guide groove position has a connecting hole that is open from top to bottom. Each guide groove has a connecting screw with a nut screwed into it after the upper end passes through the corresponding connecting hole.

8. The drill bit positioning fixture according to claim 4, characterized in that... A second connecting seat is fixedly installed on the upper right side of the indexing machine. The upper side of the second connecting seat has two guide grooves that are open from left to right and open upward. The guide grooves are inverted T-shaped, narrow at the top and wide at the bottom. The upper side of the openable pneumatic gripper corresponding to each guide groove position has a connecting hole that is open from top to bottom. Each guide groove has a connecting screw with a nut screwed into it after the upper end passes through the corresponding connecting hole.

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