CN111618670A - Adjustable twist drill grinding device - Google Patents

Abstract

The invention discloses an adjustable twist drill grinding device. Drill chuck, twist drill, grinding wheel grinding mechanism, horizontal horizontal sliding guide mechanism and vertical horizontal sliding guide mechanism are superimposed on the horizontal base in a cross direction, and horizontal horizontal sliding guide mechanism and vertical horizontal sliding guide mechanism are superimposed on the horizontal base in a cross direction. The guide rail mechanism, the rotary table is arranged on the vertical and horizontal sliding guide rail mechanism, and is used to follow the horizontal horizontal sliding rail mechanism and the vertical horizontal sliding rail mechanism to move vertically and horizontally in the horizontal plane. The sharpening transmission mechanism is placed on the rotating table, and the sharpening transmission The mechanism is connected with the clamping mechanism through a vertical sliding mechanism; the clamping mechanism is connected with a drill chuck, and the drill chuck is used to install a twist drill; one side of the horizontal base is provided with a grinding wheel grinding mechanism.

Description

Adjustable twist drill grinding device

technical field

The invention belongs to the field of tool manufacturing, in particular to an adjustable twist drill grinding device.

Background technique

Twist drills are the most commonly used hole processing tools, and are widely used in automobile manufacturing, aerospace and medical equipment and other fields. Compared with other hole processing tools, the complex drill tip structure of twist drills has always been a difficulty in tool manufacturing; With the increasing application of difficult-to-machine materials such as nickel-based superalloys, stainless steel, titanium alloys and fiber composite materials in the manufacture of modern machinery and equipment, it aggravates the tool wear and damage of the drill flank during the drilling process, shortening the cutting tool. The service life accelerates the replacement frequency of new knives, which greatly increases the manufacturing cost of parts.

Therefore, in addition to continuously optimizing and improving the structure and geometric parameters of the drill to improve the cutting performance of the tool, the improvement of the drill sharpening equipment and the grinding of the worn tool to improve the tool utilization rate are also the key points that modern tool manufacturers need to consider.

At present, most domestic tool manufacturers have three main ways to sharpen the flank of twist drills: CNC sharpening, manual sharpening or sharpening on a universal tool grinder. CNC sharpening is mostly processed by multi-axis CNC grinding machines imported from abroad. The cost of the machine tool is high, and the technical requirements for the operator are high; the quality of manual sharpening depends on the technical level and experience of the operator, and the sharpening accuracy is difficult to guarantee. , high labor intensity, poor symmetry of the cutting edge; sharpening on a universal tool grinder, the sharpening device has a complex structure, and there are many forming movements, the machine tool adjustment is cumbersome, the sharpening efficiency is low, and the practical application is less.

In addition, the improper selection of sharpening parameters can easily lead to the phenomenon of "warping" on the flank of the drill bit. During drilling, the "lifting tail" of the drill bit reduces the gap between the drill bit flank and the machined surface of the workpiece, increases the friction and drilling torque between the tool and the workpiece, and reduces the drilling quality. As a result, the drilling process cannot be carried out smoothly and the drill bit is broken.

Therefore, it is necessary to design a sharpening device with a simple structure, less sharpening parameters forming motion, high sharpening precision and low cost, which can be applied to a twist drill sharpening device with various sizes and specifications and can adjust the geometric parameters of different drill tips. , to meet the needs of modern twist drill new tool manufacturing and grinding of worn tools.

SUMMARY OF THE INVENTION

In view of this, the main purpose of the present invention is to provide an adjustable twist drill grinding device.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

The embodiment of the present invention provides an adjustable twist drill grinding device, including a horizontal base, a horizontal horizontal sliding guide mechanism, a vertical horizontal sliding guide mechanism, a rotary table, a sharpening transmission mechanism, a vertical sliding mechanism, and a clamping mechanism , drill chuck, twist drill, grinding wheel grinding mechanism, the horizontal base is superimposed on the horizontal horizontal sliding guide mechanism and the vertical horizontal sliding guide mechanism, and the horizontal base is superimposed on the horizontal horizontal sliding guide in the cross direction. mechanism, longitudinal and horizontal sliding guide rail mechanism, the rotary table is arranged on the longitudinal and horizontal sliding guide rail mechanism, and is used to follow the horizontal horizontal sliding guide rail mechanism and the longitudinal horizontal sliding guide rail mechanism to move in the vertical and horizontal directions in the horizontal plane, and the sharpening transmission mechanism is set On the rotary table, the sharpening transmission mechanism is connected with the clamping mechanism through a vertical sliding mechanism; the clamping mechanism is connected with a drill chuck, and the drill chuck is used to install a twist drill; the horizontal base The upper side is provided with a grinding wheel grinding mechanism for grinding the twist drill.

In the above scheme, the grinding wheel grinding mechanism includes a grinding wheel, a first stepping motor, a grinding wheel sliding block, a second stepping motor, a grinding wheel transmission mechanism, a support frame, and a horizontal slide rail, and the support frame is arranged on a horizontal base. And the horizontal slide rail is located on the support frame, the grinding wheel sliding block is matched and connected with the horizontal slide rail, the grinding wheel sliding block is provided with a grinding wheel on the side close to the twist drill, the grinding wheel is connected with the first stepping motor, and the grinding wheel slides The other side of the block is connected with the second stepper motor through the grinding wheel transmission mechanism.

In the above solution, the horizontal sliding guide rail mechanism and the vertical horizontal sliding guide rail mechanism include a hand wheel and a horizontal sliding frame, on which a bearing seat and a bearing are fixed, which are respectively connected with the horizontal sliding guide rail and the horizontal lead screw. , the metal reverser nut is installed on the horizontal screw, the end of the horizontal screw is equipped with a hand wheel, and the rotation of the hand wheel drives the metal reverser nut on the horizontal screw to move linearly along the horizontal sliding guide rail ; The metal reverser nut is connected with the guide rail block through screws.

In the above solution, the frame of the vertical and horizontal sliding guide rail mechanism is fixed on the guide rail block of the horizontal horizontal sliding guide rail mechanism by screws; the rotary table is fixed on the guide rail block of the vertical horizontal sliding guide rail mechanism by screws.

In the above solution, the movement directions of the lateral horizontal sliding guide rail mechanism and the longitudinal horizontal sliding guide rail mechanism are perpendicular to each other.

In the above solution, the rotary table includes a first rotating handle, a first worm, a first dial turntable, a first worm gear, and a box body, and the upper side of the box body is connected with a horizontally arranged first scale turntable by screws. A first transmission mechanism consisting of a first worm gear and a first worm is arranged in the inside of the box and parallel to the first dial dial, and a first rotating handle is arranged at one end of the first worm.

In the above solution, the sharpening transmission mechanism includes a rotating handwheel, a first connecting rod, a transmission connecting rod, a universal joint, and a second connecting rod, and one end of the first connecting rod is connected to the rotating handwheel through the first connecting rod. The other end is connected with the second connecting rod through the universal joint, the first connecting rod and the second connecting rod are both arranged on the vertical sliding mechanism, and one side of the second connecting rod is also connected with the clamping mechanism .

In the above solution, the vertical sliding mechanism includes a sharpening frame, a vertical sliding bracket, and a vertical sliding handwheel, the sharpening frame is connected to the rotary table and a vertical sliding bracket is arranged on it, and the vertical sliding bracket is A vertical sliding handwheel is arranged on one side of the straight sliding bracket; the first connecting rod and the second connecting rod are arranged on the vertical sliding bracket.

In the above solution, the clamping mechanism includes a second scale dial, a drill chuck clamping bracket, and a drill chuck sliding bracket, the drill chuck sliding bracket is fixed on the second connecting rod by screws, and the sliding bracket is connected to the second connecting rod. The drill chuck clamping bracket is connected, and a second scale turntable is arranged at the connection, and the drill chuck is fixed in the drill chuck clamping bracket through a screw and a positioning groove.

Compared with the prior art, the present invention has a simple structure, and the clamping mechanism of the twist drill can realize the clamping of various small and medium-sized drill bits; the clamping mechanism of the twist drill and the special sharpening transmission mechanism simplifies the twist drill blade. The forming movement of the grinding reduces the technical requirements of the drill bit sharpening and improves the sharpening efficiency.

Description of drawings

1 is a schematic structural diagram of an adjustable twist drill grinding device provided by an embodiment of the present invention;

2 is a schematic structural diagram of a longitudinal horizontal sliding guide rail mechanism and a rotary table in an adjustable twist drill grinding device provided by an embodiment of the present invention;

3 is a schematic structural diagram of a grinding wheel grinding mechanism in an adjustable twist drill grinding device provided by an embodiment of the present invention;

4 is a schematic structural diagram of a twist drill sharpening mechanism in an adjustable twist drill grinding device provided by an embodiment of the present invention;

5 is a schematic diagram of the sharpening principle of a twist drill in an adjustable twist drill grinding device provided by an embodiment of the present invention;

Markings in the figure: 1. Horizontal base, 2. Horizontal sliding guide mechanism, 3. Vertical horizontal sliding guide mechanism, 4. Rotary table, 5. Sharpening transmission mechanism, 6. Vertical sliding mechanism, 7. Clamping mechanism , 8. Drill chuck, 9. Twist drill, 10. Grinding wheel, 11. First stepping motor, 12. Grinding wheel sliding block, 13. Second stepping motor, 14. Grinding wheel transmission mechanism, 15. Support frame, 16 .horizontal rails

301. Handwheel, 302. Bearing seat, 303. Horizontal sliding frame, 304. Metal reverser nut, 305. Rail block, 306. Horizontal screw, 307. Horizontal sliding rail, 308. Bearing

401. The first rotating handle, 402. The first worm, 403. The first scale turntable, 404. The first worm gear, 405. The box

101. Grinding wheel shaft, 102. Lock nut

141. Guide parts, 142. Transmission parts

501. Rotary handwheel, 502. First connecting rod, 503. Transmission connecting rod, 504. Universal joint, 505. Second connecting rod

601. Sharpening frame, 602. Vertical sliding bracket, 603. Vertical sliding handwheel

701. Dial dial, 702. Drill chuck clamping bracket, 703. Drill chuck sliding bracket

901. Cone generatrix, 902. Cone axis, 903. Drill bit axis.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

An embodiment of the present invention provides an adjustable twist drill grinding device, as shown in Figures 1-5, including a horizontal base 1, a horizontal horizontal sliding guide mechanism 2, a vertical horizontal sliding guide mechanism 3, a rotating table 4, a blade Grinding transmission mechanism 5, vertical sliding mechanism 6, clamping mechanism 7, drill chuck 8, twist drill 9, grinding wheel grinding mechanism, the horizontal base 1 is superimposed on the horizontal horizontal sliding guide mechanism 2, vertical horizontal Sliding rail mechanism 3, the rotary table 4 is arranged on the vertical and horizontal sliding rail mechanism 3 to follow the horizontal horizontal sliding rail mechanism 2 and the longitudinal horizontal sliding rail mechanism 3 to move in the vertical and horizontal directions in the horizontal plane, and the sharpening transmission mechanism 5 is placed on the rotary table 4, the sharpening transmission mechanism 5 is connected with the clamping mechanism 7 through the vertical sliding mechanism 6; the clamping mechanism 7 is connected with the drill chuck 8, and the drill chuck 8 is used for A twist drill 9 is installed; one side of the horizontal base 1 is provided with a grinding wheel grinding mechanism for grinding the twist drill 9 .

The grinding wheel grinding mechanism includes a grinding wheel 10, a first stepping motor 11, a grinding wheel sliding block 12, a second stepping motor 13, a grinding wheel transmission mechanism 14, a support frame 15, and a horizontal slide rail 16. The support frame 15 is arranged on the On the horizontal base 1 and the horizontal sliding rail 16 is located on the support frame 15, the grinding wheel sliding block 12 is connected with the horizontal sliding rail 16, and the grinding wheel sliding block 12 is provided with a grinding wheel 10 on one side of the grinding wheel sliding block 12 close to the twist drill 9. The grinding wheel 10 is connected to the first stepping motor 11 , and the other side of the grinding wheel sliding block 12 is connected to the second stepping motor 13 through the grinding wheel transmission mechanism 14 .

The grinding wheel transmission mechanism 14 includes a transmission member 142, one end of the transmission member 142 is connected to the second stepping motor 13, and is rotated by the second stepping motor 13, and the other end of the transmission member 142 is connected to the guide member 141, The guide member 141 is fixed on the grinding wheel sliding block 12 by screws, and the rotational movement of the transmission member 142 is converted into a reciprocating linear motion through the guiding member 141, so that the grinding wheel sliding block 12 and the upper grinding wheel 10 can operate on the horizontal slide rail 16. Reciprocating linear motion.

The horizontal sliding guide rail mechanism 2 and the vertical horizontal sliding guide rail mechanism 3 include a hand wheel 301 and a horizontal sliding frame 303. The frame 303 is fixed with a bearing seat 302 and a bearing 308, which are respectively connected with the horizontal sliding guide rail 307 and the horizontal screw. 306 are connected, the metal reverser nut 304 is installed on the horizontal screw 306, the end of the horizontal screw 306 is equipped with a hand wheel 301, and the rotation of the hand wheel 301 drives the metal reverser nut 304 on the horizontal screw 306 to slide horizontally The guide rail 307 moves linearly; the metal reverser nut 304 is connected with the guide rail block 305 by screws.

The frame 303 of the longitudinal horizontal sliding guide rail mechanism 3 is fixed on the guide rail block of the horizontal horizontal sliding guide rail mechanism 2 by screws; the rotary table 4 is fixed on the guide rail block 305 of the longitudinal horizontal sliding guide rail mechanism 3 by screws.

The moving directions of the lateral horizontal sliding guide mechanism 2 and the longitudinal horizontal sliding guide mechanism 3 are perpendicular to each other.

The rotary table 4 includes a first rotating handle 401 , a first worm 402 , a first dial 403 , a first worm wheel 404 , and a box 405 . The upper side of the box 405 is connected to the first worm wheel 404 . The horizontally arranged first scale turntable 403, the rotation of the first scale turntable 403 is driven by a first transmission mechanism composed of a first worm wheel 404 and a first worm 402, and one end of the first worm 402 is provided with a first Rotate handle 401.

The sharpening transmission mechanism 5 includes a rotating hand wheel 501, a first connecting rod 502, a transmission connecting rod 503, a universal joint 504, and a second connecting rod 505. One end of the first connecting rod 502 passes through the first connecting rod 502. It is connected with the rotating hand wheel 501, and the other end is connected with the second connecting rod 505 through the universal joint 504. The first connecting rod 502 and the second connecting rod 505 are both arranged on the vertical sliding mechanism 6. The second connecting rod One side of the rod 505 is also connected to the clamping mechanism 7 .

The vertical sliding mechanism 6 includes a sharpening frame 601, a vertical sliding bracket 602, and a vertical sliding hand wheel 603. The sharpening frame 601 is connected to the rotary table 4 and the vertical sliding bracket 602 is arranged thereon. One side of the vertical sliding bracket 602 is provided with a vertical sliding hand wheel 603 ; the first connecting rod 502 and the second connecting rod 505 are arranged on the vertical sliding bracket 602 .

The clamping mechanism 7 includes a second dial 701, a drill chuck clamping bracket 702, and a drill chuck sliding bracket 703. The drill chuck sliding bracket 703 is fixed on the second connecting rod 505 by screws. The bracket 703 is connected with the drill chuck clamping bracket 702 , and a second dial 701 is provided at the connection. The drill chuck 8 is fixed in the drill chuck clamping bracket 702 by screws and positioning grooves.

As shown in Figures 1 to 5, the concrete steps of the present invention for grinding twist drills based on the tapered surface sharpening method are as follows:

① Place the twist drill 9 to be ground into the drill chuck 8, and adjust the appropriate extension length according to the size of the drill bit. When sharpening, the initial grinding position of the main cutting edge of the drill bit should be parallel to the grinding contact surface of the grinding wheel. (The contact line between the main cutting edge of the drill bit and the grinding wheel is the conical generatrix 901), the positioning line is marked on the drill chuck 8, turn the twist drill 9, adjust the positioning of the drill bit, and lock the drill chuck 8; 8, install the drill chuck 8 on the drill chuck clamping bracket 702, and fix it with screws.

②Through the scale dial 701, rotate the drill chuck clamping bracket 702 to adjust the angle ( That is, the inter-shaft angle θ); tighten the screw, move the drill chuck sliding bracket 703, and adjust the relative position between the twist drill 9 and the cone apex angle O, thereby realizing the adjustment of the cone apex distance A.

3. By rotating the vertical sliding handwheel 603, the vertical sliding bracket 602 is driven to move up and down on the sharpening frame 601 according to the scale size, thereby adjusting the offset distance between the tapered generatrix 902 and the middle section of the twist drill 9 (that is, the offset distance). e).

④ By rotating the rotary table handle 401, through the transmission mechanism composed of the worm wheel 404 and the worm 402, the rotation of the first scale turntable 403 and the twist drill sharpening mechanism installed on it is driven, thereby realizing the adjustment of the half cone angle δ.

⑤By turning the hand wheel, the horizontal sliding guide mechanism 2 and the vertical horizontal sliding guide mechanism 3 are respectively driven to move in the horizontal direction, so as to adjust the relative position between the twist drill sharpening mechanism and the grinding wheel 10 .

⑥ The first stepper motor 11 drives the grinding wheel 10 to rotate, the second stepper motor 13 drives the transmission member 142 to rotate, and is converted by the guide member 141 to drive the grinding wheel 10 to reciprocate linearly on the horizontal slide rail 16, thereby ensuring the twist When the drill 9 is sharpened, the grinding surface of the grinding wheel is evenly ground.

⑦Before sharpening of twist drill 9, in order to eliminate or avoid the phenomenon of "lifting tail" on the flank of the drill bit, and to ensure that the bevel angle ψ of the chisel edge after sharpening of the drill bit is within the specified reasonable value range, it is necessary to rotate the drill bit around its own axis. Rotate the angle β counterclockwise.

⑧ By turning the handwheel 501, the first connecting rod 502 is driven to rotate, and the rotating motion of the first connecting rod 502 is converted into the left and right swinging motion of the second connecting rod 505 through the conversion of the transmission connecting rod 503 and the universal joint 504. , so as to realize the processing motion trajectory when sharpening the flank face of the twist drill taper surface.

⑨ Adjust the grinding allowance of the twist drill 9 through the sliding feed of the vertical and horizontal sliding guide mechanism 3 in the horizontal direction. When one side of the sharpening is completed, the twist drill sharpening mechanism returns to the appropriate position horizontally, and the drill clamp is tightened. The head clamps the screws on the bracket 702, and the twist drill 9 is rotated 180° and then tightened to continue processing, thereby realizing the grinding of the twist drill.

Compared with the existing grinding device, the present invention has a simple structure of the sharpening device, and the clamping mechanism of the twist drill can realize the clamping of various small and medium-sized drill bits; through the clamping mechanism of the twist drill and the special sharpening transmission mechanism, The forming movement of twist drill sharpening is simplified, the technical requirements for drill sharpening are reduced, and the sharpening efficiency is improved.

In addition, by adjusting the sharpening parameters of the twist drill (the inter-shaft angle θ, the half-cone angle δ, the offset distance e, the cone-top distance A and the reversal angle β), the twist drill with different geometric parameters of the drill tip can be realized. Surface sharpening, strong adaptability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (9)

1. An adjustable grinding device for twist drills is characterized by comprising a horizontal base, a transverse horizontal sliding guide rail mechanism, a longitudinal horizontal sliding guide rail mechanism, a rotary worktable, a cutter grinding transmission mechanism, a vertical sliding mechanism, a clamping mechanism, a drill chuck, a twist drill and a grinding wheel grinding mechanism, a transverse horizontal sliding guide rail mechanism and a longitudinal horizontal sliding guide rail mechanism are arranged on the horizontal base in a cross-shaped overlapping manner, a transverse horizontal sliding guide rail mechanism and a longitudinal horizontal sliding guide rail mechanism are superposed on the horizontal base in a cross direction, the rotary worktable is arranged on the longitudinal horizontal sliding guide rail mechanism and is used for moving in the longitudinal and transverse directions in the horizontal plane along with the transverse horizontal sliding guide rail mechanism and the longitudinal horizontal sliding guide rail mechanism, the cutter grinding transmission mechanism is arranged on the rotary workbench and is connected with the clamping mechanism through a vertical sliding mechanism; the clamping mechanism is connected with a drill chuck, and the drill chuck is used for mounting a twist drill; and a grinding wheel grinding mechanism is arranged on one side of the horizontal base and is used for grinding the twist drill.

2. The adjustable twist drill dressing device according to claim 1, wherein the grinding wheel grinding mechanism comprises a grinding wheel, a first stepping motor, a grinding wheel sliding block, a second stepping motor, a grinding wheel transmission mechanism, a support frame and a horizontal sliding rail, the support frame is arranged on the horizontal base, the horizontal sliding rail is arranged on the support frame, the grinding wheel sliding block is connected with the horizontal sliding rail in a matching manner, the grinding wheel is arranged on one side, close to the twist drill, of the grinding wheel sliding block, the grinding wheel is connected with the first stepping motor, and the other side of the grinding wheel sliding block is connected with the second stepping motor through the grinding wheel transmission mechanism.

3. The adjustable twist drill grinding device according to claim 1 or 2, wherein the transverse horizontal sliding guide rail mechanism and the longitudinal horizontal sliding guide rail mechanism each comprise a hand wheel and a horizontal sliding frame, a bearing seat and a bearing are fixed on the frame and respectively connected with the horizontal sliding guide rail and a horizontal lead screw, the metal reverser nut is mounted on the horizontal lead screw, the end part of the horizontal lead screw is provided with the hand wheel, and the hand wheel rotates to drive the metal reverser nut on the horizontal lead screw to make linear motion along the horizontal sliding guide rail; the metal reverser nut is connected with the guide rail block through a screw.

4. The adjustable twist drill dressing apparatus according to claim 3, wherein the frame of said longitudinal horizontal sliding guide mechanism is fixed to the guide block of the transverse horizontal sliding guide mechanism by means of screws; the rotary workbench is fixed on a guide rail block of the longitudinal horizontal sliding guide rail mechanism through a screw.

5. The adjustable twist drill dressing apparatus of claim 4, wherein said transverse horizontal sliding track means and said longitudinal horizontal sliding track means are oriented in a direction perpendicular to each other.

6. The adjustable twist drill dressing device according to claim 5, wherein the rotary table comprises a first rotary handle, a first worm, a first scale rotating disc, a first worm wheel and a box body, the upper side of the box body is connected with the horizontally arranged first scale rotating disc through a screw, a first transmission mechanism which is parallel to the first scale rotating disc and consists of the first worm wheel and the first worm is arranged inside the box body, and the first rotary handle is arranged at one end of the first worm.

7. The adjustable twist drill dressing device according to claim 6, wherein the sharpening transmission mechanism comprises a rotating hand wheel, a first connecting rod, a transmission connecting rod, a universal joint and a second connecting rod, wherein one end of the first connecting rod is connected with the rotating hand wheel through the first connecting rod, the other end of the first connecting rod is connected with the second connecting rod through the universal joint, the first connecting rod and the second connecting rod are both arranged on the vertical sliding mechanism, and one side of the second connecting rod is further connected with the clamping mechanism.

8. The adjustable twist drill dressing apparatus of claim 7, wherein the vertical sliding mechanism comprises a sharpening frame, a vertical sliding bracket, a vertical sliding hand wheel, the sharpening frame is connected with the rotary table and is provided with the vertical sliding bracket, and one side of the vertical sliding bracket is provided with the vertical sliding hand wheel; the first connecting rod and the second connecting rod are arranged on the vertical sliding support.

9. The adjustable twist drill dressing device according to claim 8, wherein the clamping mechanism comprises a second scale turntable, a drill chuck clamping bracket and a drill chuck sliding bracket, the drill chuck sliding bracket is fixed on the second connecting rod through a screw, the sliding bracket is connected with the drill chuck clamping bracket, the second scale turntable is arranged at the joint, and the drill chuck is fixed in the drill chuck clamping bracket through a screw and a positioning groove.

Images