CN107756149A - A kind of drill bit arrangement for grinding - Google Patents

Abstract

The present invention discloses a kind of drill bit arrangement for grinding, technical scheme includes drill bit arrangement for grinding, the drill bit arrangement for grinding is mainly by support, slide rail, column, main shaft, slide block assembly, drilling attachment forms, described support one end is connected with abrasive machine, opposite end is connected with slide rail, the slide rail, column, contiguous block connection is respectively adopted between main shaft, make institute's slide rail by adjusting the elastic of contiguous block, column, the adjustment of relative position can be carried out between main shaft, the main shaft passes through bearing, bearing block connects with the sliding block base in slide block assembly, the drilling attachment is fixed on the sliding block in slide block assembly, and slide block assembly is followed to rotate.

Description

A drill grinding device

technical field

The invention relates to a drill grinding device.

Background technique

Drill grinding machine, as the name implies, is a machine for precise grinding and processing of drill bits. Drill grinding machine is also known as drill grinding machine. The disadvantages of the existing drill bit grinding machine are: 1. Only for drill bits of a certain size range, such as small-size drill bit grinding machines cannot clamp large-size drill bits, and for large-size drill bit grinding machines, small-size drill bit clamps It is difficult to maintain, and it is difficult to guarantee the required accuracy; 2. The method of screw feeding and dial setting parameters is generally used. The above-mentioned method is cumbersome to operate, difficult for operators to master, and its volume is large, and the manufacturing cost is high; 3. Due to the use of screw feeding The sliding components driven by the screw are limited by the screw feeding mechanism and cannot slide freely; 4. For large drill bit grinding machines, the drill bit is at an angle of lift during operation, and it is supported on the grinding wheel, while the rotation direction of the grinding wheel is the same as that of the drill bit. The upward direction is reversed. When grinding in the above situation, the grinding wheel will exert a downward force on the drill bit, which will reduce the lift angle of the drill bit. The decrease of the lift angle of the drill bit will increase the grinding amount, and the downward force exerted by the grinding wheel will increase with the grinding amount. Increase and increase, because the sliding components cannot slide freely, thus forming a vicious circle, resulting in excessive grinding, in severe cases, the drill bit will be damaged, the grinding wheel will crack, causing a safety accident; Complicated and expensive.

Contents of the invention

The technical problem to be solved by the present invention is to provide a drill grinding device with applicable range, flexible operation, safety and reliability, compact structure and low cost.

In order to solve the above problems, the technical solution adopted in the present invention includes a drill bit grinding device, which is mainly composed of a bracket, a slide rail, a column, a main shaft, a slider assembly, and a drill bit clamp. One end of the bracket is connected to the grinder, The opposite end is connected with the slide rail, and the slide rail, the column, and the main shaft are respectively connected by connecting blocks. By adjusting the tightness of the connecting block, the relative position of the slide rail, the column, and the main shaft can be adjusted. The main shaft passes through The bearing, the bearing seat and the slide block base in the slide block assembly are connected, and the drill bit clamp is fixed on the slide block in the slide block assembly and rotates with the slide block assembly.

The drill grinding device is characterized in that: the slider assembly is provided with a limit mechanism, and the drill is fed by pushing the slider of the slider assembly by hand, and the grinding amount is given by the limit mechanism.

The drill grinding device is characterized in that: the limit mechanism includes an adjustment screw, an adjustment nut, and a slider limit block, the adjustment screw is installed on the slider of the slider assembly, and the adjustment nut It is connected with the adjusting screw rod, and the slider limiting block is installed on the slider base of the slider assembly.

The above described drill grinding device is characterized in that: the adjusting screw is also connected with a tightening nut.

The drill grinding device is characterized in that: the drill clamp includes a V-shaped block, a compression block, a compression screw, and a compression bracket, and the V-shaped block is fixed on the slider of the slider assembly, The pressing bracket is connected with the V-shaped block, and the pressing block is located in the pressing bracket, and is driven to move up and down by the pressing screw.

The drill grinding device is characterized in that: the rear end of the drill clamp is provided with a positioning rod and a rear positioning block installed on the positioning rod, and the rear positioning block is provided with a reverse positioning rod.

The drill grinding device is characterized in that: the front end of the drill clamp is provided with an angular limit pin, and the angular limit pin is adjusted so that the head is close to the side of the chip flute of the side edge of the drill bit for angular adjustment. position.

The drill grinding device is characterized in that: the main shaft is provided with a limit pin, and the limit pin determines the rotation dead point of the main shaft.

The drill grinding device is characterized in that: the connection block is a cross connection block, and the two ends of the connection block are provided with release and compression handles.

The drill grinding device is characterized in that: the drill clamp also includes a drill chuck, a drill adapter, a positioning sleeve, and a locking screw, the head of the drill adapter is connected to the tail of the drill chuck, and the rest is inserted into the into the center hole of the positioning sleeve, and fixed by locking screws.

The drill bit grinding device of the present invention has the following advantages:

1. This device adopts the combination fixture, and each positioning part of the fixture has a large-scale adjustment structure, which can realize the clamping and grinding of different sizes of drill bits, and the size of the drill bit grinding is only limited by the thickness of the grinding wheel;

2. On the premise of ensuring the symmetry of the main cutting edge, this device cancels the screw feed and the dial. Compared with the existing drill bit grinding machine, it has the advantages of small size, light weight and low manufacturing cost;

3. This device adopts the method of cross connecting block and pressing handle to adjust the parameters visually. Only the limit mechanism composed of adjusting screw and adjusting nut is used on the slider assembly, and the slider is pushed by hand to feed. The limiting mechanism sets the grinding amount. Compared with the existing drill bit grinding machine, the device is easy to operate and easy for operators to grasp.

4. The sliding assembly of this device only limits the feed rate. When excessive grinding occurs, the slider will passively retreat to reduce the grinding amount and avoid safety accidents;

5. This device is installed on the basis of the existing grinder without occupying additional space. The structure is simple, the cost is low, and it is easy to disassemble. Loosen the compression handle on any cross connection block, all the structures behind the cross connection block can be dismantled, leaving only a small part remaining, which will not affect the daily use of the grinder. Compared with the existing drill grinding machine, the device is more economical and flexible.

The present invention will be further described below in conjunction with the accompanying drawings of the description.

Description of drawings

Fig. 1, 2 are the structural representations of different angles of the drill grinding device of the present invention;

Fig. 3 is a schematic diagram of the relationship between the main shaft, the slider assembly and the drill clamp of the present invention, wherein the drill clamp is a large drill grinding clamp;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is the bottom view of Fig. 3;

Fig. 6 is the left view of Fig. 3;

Fig. 7 is the right view of Fig. 3;

Fig. 8 is a schematic diagram of the relationship between the main shaft, the slider assembly and the drill fixture of the present invention, wherein the drill fixture is a fast grinding fixture suitable for small drills;

Fig. 9 is a left side view of Fig. 8;

Fig. 10 is a schematic structural view of the drill clamp in Fig. 8;

Fig. 11 is a schematic structural view of the drill bit clamp of the present invention, specifically a precision grinding jig adapted to a small drill bit;

Fig. 12 is a left side view of Fig. 11 .

Detailed ways

Referring to Figures 1-12, the drill grinding device of the present invention comprises a bracket 2, a slide rail 3, a column 4, a main shaft 5, a slider assembly and a drill clamp, and one end of the bracket 2 is connected to the grinder 1, opposite The end is connected with the slide rail 3, and the slide rail 3, the column 4, and the main shaft 5 are respectively connected by connecting blocks. The connecting block is provided with fasteners. By adjusting the tightness of the fasteners, the slide rails 3, The relative position can be adjusted between the column 4 and the main shaft 5. The main shaft 5 is connected with the slider base 16 in the slider assembly through the bearing 15, the bearing seat 14, and the drill bit clamp is fixed on the slider in the slider assembly. 17, and follow the slider assembly to rotate. The connecting block is preferably a cross connecting block (the connecting block has a cross mounting hole), the slide rail, column, and main shaft are installed in the mounting hole, and the fasteners arranged at both ends of the connecting block are preferably loosened. Squeeze the handle.

When in use, it is necessary to loosen the mounting screws of the foot of the grinder 1, place the bracket 2 between the grinder 1 and the original installation base, tighten the mounting screws of the feet, and press the bracket 2, and the slide rail 3 is connected to the bracket 2 and fixed at both ends, the lower end of the column 4 is connected to the slide rail 3 through the first cross connection block 6, the first loosening and pressing handle 8 can adjust the position of the first cross connection block 6 on the slide rail 3, so that the The grinding bit is aligned with the appropriate position of the grinding wheel. The first cross connecting block 6 can rotate the slide rail 3 as the axis and drive the column 4 and the above parts to approach or move away from the grinding wheel, so that the device can adapt to grinding wheels of different diameters. The second loosen Pressing the handle 9 can make the column 4 move up and down, and the main shaft 5 can be adjusted to the same horizontal line as the main shaft of the grinder 1, so that the device can adapt to grinders with different distances from the main shaft of the feet. The upper part of the column 4 passes through the second cross connection block 7 Connect with the main shaft 5, loosen the compression handle 10 thirdly, and adjust the horizontal angle between the main shaft 5 and the main shaft of the grinder. The main shaft 5 can adjust the positioning pin 12 located on the main shaft 5. The positioning pin 12 and the limit stop 13 fixed on the bearing seat 14 together form a dead point of rotation. This dead point determines the back angle of the main cutting edge of the drill. The device is connected by the bearing 15 and the bearing seat 14. The main shaft is fixed and the bearing seat rotates. The slider assembly and the clamping assembly follow the rotation of the bearing seat. Wherein the slider base 16 is fixed on the bearing seat 14, the slider 17 is connected with the slider base 16 by a dovetail groove, and the clamping assembly is composed of a V-shaped block 22, a compression bracket 23, a compression block 24, and a compression screw 25, wherein V The shape block 22 is fixed on the slide block 17 and the compression bracket 23 is connected with the V-shaped block 22 in the form of a dovetail groove, which can slide back and forth along the dovetail groove. The compression block 24 is located in the compression bracket 23 and is driven by the compression screw to move up and down. .

Adjust the device to a proper state during drill grinding, adjust the horizontal angle between the main shaft 5 and the main shaft of the grinder 1, set the angle between the blades, adjust the limit pin 12, and determine the rotation stop point. When reaching the rotation stop point, V The center line of the shaped groove should maintain an upward posture and form an included angle with the radial horizontal line of the grinding wheel. The larger the value of the included angle, the larger the relief angle of the main cutting edge. When the value of the included angle is negative, the relief angle of the main cutting edge is zero. The drill bit is placed in the V-shaped groove of the V-shaped block 22, and the front part exceeds the V-shaped block 22 a little. When the rotation stops, the drill bit is adjusted so that the cutting edge to be ground is parallel to the radial horizontal plane of the emery wheel, and the screw rod 25 is rotated to make the pressure The tight block 24 presses the drill bit, adjust the angular limit pin 30 so that the head of the angular limit pin 30 is close to the side of the chip removal groove of the side margin of the drill bit, and the angular positioning of the drill bit is realized by utilizing the natural symmetry of the side margin of the drill bit , compress the angular positioning compression block 31 to fix the angular limit pin 30, adjust the rear positioning block 27 located on the rear positioning rod 26, make the rear positioning block 27 close to the tail of the drill bit, tighten the rear positioning locking screw 28, and realize The axial positioning of the drill bit, when the length of the drill bit is not enough to realize the axial positioning, a reverse positioning rod 29 is installed on the rear positioning block 27, and the grinding amount of the device is controlled by the adjusting screw rod 19 and the adjusting nut 20 on the side of the slider 17, and tightened. The nut 21 and the slider limiter 18 are set, wherein the adjustment screw 19 is fixed on the slider 17, the slider limiter 18 is fixed on the slider base 16, the adjustment nut 20 is rotated to set the grinding amount, and the nut is tightened 21 is used to lock the adjusting nut 20 to prevent the adjusting nut 20 from being displaced due to vibration or accidental touch.

After the drill bit is clamped in place, start the grinder. The operator pushes the slider 17 forward by hand and rotates forward until the rotation stop point and then rotates backward until the adjusting nut 20 touches the slider limit block 18, and the main cutting edge on one side is completed. Grinding, loosen the compression screw 25, utilize the positioning effect of the angular positioning pin 30 and the rear positioning block 27, re-clamp the drill bit, and grind the other main cutting edge.

The above is for large drill bit grinding, because it is difficult to clamp small drill bits by the V-shaped groove clamping method, this device uses a combined fixture, small drill bits use quick grinding fixtures and precision grinding fixtures, and the quick grinding fixtures are composed of drill clamps Head 32, drill connecting rod 33, positioning sleeve 34, and locking screw 35. The taper shank at the head of the drilling connecting rod 33 is connected to the taper hole at the tail of the drill chuck 32, and the rest is inserted into the central circular hole of the positioning sleeve 34. The drill bit consists of The drill chuck 32 is clamped. Since the drill bit can only clamp the head during grinding, the central through hole of the drill rod 33 is drilled, and the tail of the drill bit extends backward through the hole. During operation, the positioning sleeve 34 is compressed by the compression screw 25 24 is fixed in the V-shaped groove of the V-shaped block 22, the tail plane of the drill chuck 32 is attached to the front surface of the V-shaped block 22, and the drill chuck 32 is rotated to adjust the main cutting edge to be ground to the axial level of the grinding wheel Parallel, lock with the locking screw 35, grind the drill bit in the same way as grinding the large drill bit, after finishing grinding the main cutting edge on one side, loosen the compression screw 25, and rotate the quick grinding fixture 180 degrees to re-clamp it. Grind the other main cutting edge. The precision grinding fixture is composed of a spring collet 36, a collet nut 37, a collet base 38, an extension rod 39, a positioning sleeve 34, and a locking screw 35. The collet base 38 and the extension rod 39 are integral structures, with a central through hole, a drill The tail extends backward through the hole, and the length of the drill bit is not limited. When in use, the drill bit is inserted into the center hole of the spring collet 36, and the collet nut 37 is tightened to clamp the drill bit. The extension rod 39 is inserted into the positioning sleeve 34, the collet base 38 and the extension rod 39 The shoulder at the junction is close to the front end of the V-shaped block, and other operations are the same as the quick grinding fixture.

The above does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred implementation cases, it is not used to limit the present invention. Within, when the structure and technical content disclosed above can be used to make some changes or modifications to equivalent implementation cases with equivalent changes, but any content that does not deviate from the technical solution of the present invention, the above implementation cases shall be modified according to the technical essence of the present invention Any simple modifications, equivalent changes and modifications are still within the scope of the technical solution of the present invention.

Claims (10)

1. A drill bit grinding device, characterized in that: the drill bit grinding device is mainly composed of a bracket (2), a slide rail (3), a column (4), a main shaft (5), a slider assembly, and a drill bit fixture. One end of the bracket (2) is connected to the grinder (1), and the opposite end is connected to the slide rail (3). Adjust the tightness of the connecting block so that the relative position of the slide rail (3), column (4) and main shaft (5) can be adjusted. The main shaft (5) passes through the bearing (15), the bearing seat (14) and the slide The slider base (16) in the block assembly is connected, and the drill bit clamp is fixed on the slider (17) in the slider assembly and rotates following the slider assembly. 2. The drill grinding device according to claim 1, characterized in that: the slider assembly is provided with a limit mechanism, and the drill bit is fed by pushing the slider (17) of the slider assembly by hand, so as to The limit mechanism sets the grinding amount. 3. The drill grinding device according to claim 2, characterized in that: the limit mechanism includes an adjustment screw (19), an adjustment nut (20), a slider limit block (18), and the adjustment screw ( 19) Installed on the slider (17) of the slider assembly, the adjustment nut (20) is connected with the adjustment screw (19), the slider limiter (18) is installed on the slider assembly on the slider base (16). 4. The drill bit sharpening device according to claim 3, characterized in that: the adjusting screw (19) is also connected with a tightening nut (21). 5. The drill grinding device according to claim 1, characterized in that: the drill clamp includes a V-shaped block (22), a compression block (24), a compression screw (25), and a compression bracket (23) , the V-shaped block (22) is fixed on the slider (17) of the slider assembly, the pressing bracket (23) is connected with the V-shaped block (22), and the pressing block (24) is located at Compress the inside of the bracket (23), and be driven up and down by the compression screw rod (25). 6. The drill grinding device according to claim 5, characterized in that: the rear end of the drill clamp is provided with a positioning rod (26) and a rear positioning block (27) installed on the positioning rod (26), the The rear positioning block (27) is provided with a reverse positioning rod (29). 7. The drill grinding device according to claim 5, characterized in that: the front end of the drill clamp is provided with an angular limit pin (30), and the angular limit pin (30) is adjusted to make its head close to the drill bit The flute side of the side land is positioned angularly. 8. The drill grinding device according to claim 1, characterized in that: the main shaft (5) is provided with a limit pin (12), and the limit pin (12) determines the rotation stop of the main shaft (5). point. 9. The drill bit grinding device according to claim 1, characterized in that: the connecting block is a cross connecting block, and there are loosening and pressing handles at both ends. 10. The drill grinding device according to claim 5, characterized in that: the drill clamp further includes a drill chuck (32), a drill rod (33), a positioning sleeve (34), and a locking screw (35) , the head of the drill rod (33) is connected to the tail of the drill chuck (32), and the rest is inserted into the center hole of the positioning sleeve (34) and fixed by the locking screw (35).