CN210938403U - Negative chamfering machining clamp for cutter - Google Patents

Abstract

The utility model provides a tool negative chamfering processing fixture, which belongs to the field of mechanical processing. The device includes three parts: a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism. At present, the processing of negative chamfering mainly relies on the special indexable tool CNC precision grinder imported from abroad and the ordinary grinder assisted by the special negative chamfering fixture. With the help of foreign special indexable tool CNC precision grinder, the precision of negative chamfering is high quality and stable, but the equipment investment is large; while the ordinary grinder grinding using special negative chamfering fixture in China has less equipment investment, but the negative chamfering of grinding. The edge precision is low, the quality is unstable, and the operation is inconvenient. The utility model expands the processing range of the common grinding machine, so that the common grinding machine can process the negative chamfer with high precision and stable quality; meanwhile, the structure is simple, the operation is convenient, the cutting tool processing production efficiency is improved, and the production cost is reduced.

Description

A tool for negative chamfering machining fixture

technical field

The utility model belongs to the field of mechanical processing, in particular to a tool negative chamfering processing fixture.

Background technique

The negative chamfering of the tool is a negative rake angle plane with a width of about 0.1-0.2mm that is ground at the cutting edge of the tool, so as to increase the wedge angle of the tool to improve the strength of the tool, and at the same time change the heat dissipation conditions, which can strengthen the cutting edge. On the basis of not increasing the cutting force, the durability of the tool is improved. On many carbide tools, ceramic tools, PCBN tools and various machine-clamped blades, the method of grinding negative chamfers is used to increase the strength of the cutting edge.

At present, the processing of negative chamfering mainly relies on the special indexable tool CNC precision grinder imported from abroad and the ordinary grinder assisted by the special negative chamfering fixture. Due to the existence of technological fortresses in advanced precision grinding technology abroad, it is difficult for us to get a glimpse of some foreign precision CNC grinding machines; while the negative chamfering fixtures independently designed by domestic tool processing factories are relatively poor in quality and poor in operation. It is inconvenient to get up, so in order to effectively and conveniently process the negative chamfers of various tools without resorting to foreign expensive tool precision grinders, we aim to design a tool negative chamfer grinding fixture to expand the processing range of ordinary grinders , so that we can grind high-quality negative chamfering tools on ordinary grinding machines.

Utility model content

The purpose of the utility model is to solve the above problems and provide a novel tool negative chamfer machining fixture.

The technical scheme adopted by the utility model is as follows:

A tool negative chamfering processing fixture comprises a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism.

The position adjustment mechanism includes a tool rest 1 , an upper slider 2 , a first lead screw bolt 3 , an intermediate slider 4 , a rotating shaft 5 , a tool clamping block 6 , a tool 7 and a second lead screw bolt 8 .

The front side of the tool holder 1 is provided with a figure-eight positioning baffle plate for tool positioning and a cylindrical countersunk hole for the installation of the tool holder fixing bolts; the bottom of the tool holder 1 is provided with a T-shaped for installing the tool holder block 6 . The front end of the T-shaped groove communicates with the front side of the tool holder, the T-shaped groove is opposite to the opening direction of the figure-eight positioning baffle, and the top of the T-shaped groove is provided with a bolt hole for fixing the tool holder 6; the rear side of the tool holder 1 is provided with There is a positioning block for the positioning of the tool holder. The tool holder 1 needs to be replaced with different tool holders according to different tool types to be processed, so as to meet the needs of negative chamfer grinding of different tools.

The upper slider 2 is an irregular structure, and its front side is provided with a positioning groove for positioning the tool holder 1 and a bolt hole for fixing the tool holder 1; , the nut structure and the second screw bolt 8 can cooperate to move the upper slider 2 to drive the tool holder 1 to move in the Y direction;

The first lead screw bolt 3 is a hexagon socket bolt, and an annular semicircular groove is set near the bolt head for installing the first lead screw bolt 3 on the T-shaped slider at the front end of the rotating shaft 5 through the pin.

The middle slider 4 is an irregular structure, and its front end is provided with a rectangular slider. The rectangular slider can slide along the rectangular groove on the rear side of the upper slider 2. The rectangular slider is provided with a groove for installing the upper slider. The nut structure of 2, the front side of the rectangular slider is provided with a pin hole, and the second lead screw bolt 8 is fixedly installed through the pin column. There is a rectangular slot in the middle of the rear end of the middle slider 4, the rectangular slider at the front end is perpendicular to the rectangular slot at the rear end, and a nut structure is also arranged in the middle of the rectangular slot, and the nut structure and the first screw bolt 3 can cooperate with each other. The middle slider 4 drives the upper slider 2 and the tool holder 1 to move in the X direction; the side of the rectangular groove is provided with a bolt hole for installing a clamping bolt to fix the position of the T-shaped slider at the front end of the rotating shaft 5 in the rectangular groove.

The tool clamping block 6 is a T-shaped block. The tool clamping block 6 can slide along the T-shaped groove on the side of the tool holder 1. The front end of the T-shaped block is provided with a groove, which can realize the clamping of a quadrilateral tool; The edges are provided with corresponding chamfers to facilitate tool clamping.

The tool 7 is positioned by the figure-eight positioning baffle on the front end surface of the tool holder 1, and is fixed on the tool holder 1 by a tool holder 6 and an inner hexagon bolt.

The second lead screw bolt 8 is a hexagon socket head bolt, and an annular semicircular groove is set near the bolt head for mounting the second lead screw bolt 8 on the rectangular slide on the front end surface of the intermediate slider 4 through the pin. on the block.

The rotating shaft mechanism includes a rotating shaft 5 , a rotating shaft base 9 and a crank handle 10 .

The front end of the rotating shaft 5 is provided with a T-shaped sliding block, and the T-shaped sliding block can slide along the rectangular groove at the rear end of the intermediate sliding block 4; , The front side of the T-shaped slider is provided with a pin hole for installing the first screw bolt 3 . The middle part of the rotating shaft 5 is placed in the stepped through hole in the horizontal direction at the upper part of the rotating shaft base 9 , and after being placed, the rotating shaft 5 is pushed tightly by the nut in the horizontal direction. The rear end of the rotating shaft 5 is provided with a threaded through hole for installing the crank handle 10 .

The rotating shaft base 9 is a stepped rectangular block structure, the upper part of which is perpendicular to the direction of the front side face is provided with a stepped through hole. Smooth operation. The top of the rotating shaft base 9 is provided with a threaded hole, and a hexagon socket head bolt is installed to fix the rotating shaft 5 to prevent it from rotating when adjusting the position adjusting mechanism. There are through holes on the left and right sides of the stepped platform at the bottom of the rotating shaft base 9 for installing the clamping shaft 13 to fix the position of the rotating shaft base 9 .

The crank handle 10 is a conical cylindrical body with a stepped platform, and a thread is provided at the position where the diameter of the end portion is small, which is used for connecting with the rotating shaft 5 to drive the rotating shaft 5 to rotate. The crank handle 10 is used to increase the rotation radius of the rotating shaft 5 to facilitate the operator to rotate the rotating shaft 5 .

The middle part of the rotating shaft 5 penetrates the stepped through hole of the rotating shaft base 9, and the rear end surface of the T-shaped slider at the front end of the rotating shaft 5 is in contact with the deep groove ball bearing matched with the front side of the stepped hole of the rotating shaft base 9 through a flat washer. The outer diameter of the flat washer is slightly larger. It is smaller than the inner diameter of the outer ring of the deep groove ball bearing to ensure that the flat washer fits the inner ring of the deep groove ball bearing, so that the shaft 5 can rotate with the rotation of the inner ring of the deep groove ball bearing. The deep groove ball bearing matched with the rear side of the stepped hole of the rotating shaft base 9 is fitted with a thrust ball bearing, and the fastening bolts threaded with the middle of the rotating shaft 5 jointly ensure the fixing of the rotating shaft 5 .

The angle adjustment mechanism includes a clamping pin 11 , a nylon sleeve 12 , a clamping shaft 13 , an angle pointer 14 and a base 15 .

The clamping shaft 13 is a cylindrical shaft with two stepped platforms. The part with the smallest diameter at one end is provided with a thread, which passes through the step platform at the bottom of the rotating shaft base 9 to fix the clamping shaft 13 on the base 15; the part with the largest diameter at the other end is provided with a pin hole for installing the clamping pin 11 It is convenient for the operator to rotate the clamping shaft 13 ; the middle optical shaft part is used to cooperate with the rotating shaft base 9 to fix the position of the rotating shaft base 9 .

One end of the clamping pin 11 is a hemispherical head, the diameter of the hemispherical head is larger than the inner diameter of the pin hole of the clamping shaft 13 , the other end is an elliptical cylinder, and the middle part is a cylindrical structure. The middle of the clamping pin 11 passes through the pin hole of the clamping shaft 13 , and the hemispherical head and the tail of the elliptical column enable it to move up and down without breaking away from the clamping shaft 13 . The clamping pin 11 can make it convenient for the operator to rotate the clamping shaft 13 under the condition of its own small size.

The nylon sleeve 12 is a nylon material ring, which is installed between the clamping shaft 13 and the rotating shaft base 9 to ensure that the surfaces of the two parts are not damaged during clamping.

The angle pointer 14 is an L-shaped angle iron. One side is triangular, and the angle determined by the rotation of the shaft base 9 is ensured by the coincidence of the triangular apex angle with the different angle scale lines on the left side of the base 15; the other side is provided with two threaded holes for the angle pointer. Installed on the shaft base 9 .

The left side of the base 15 is provided with a countersunk bolt hole for installing the clamping shaft 13 and fixing the position of the rotating shaft base 9; the left side is also provided with an angle scale, which is used to coincide with the triangular top of the angle pointer 14 Determine the rotation angle of the shaft base 9; the right side is provided with a wedge-shaped groove, and the rear side is provided with a pin hole, which is used to install a pin to clamp the ordinary grinder tool holder into the wedge-shaped groove, and fix the base 15 to the ordinary grinder. on the knife holder.

The position adjustment mechanism needs to be adjusted by means of a stereo microscope before processing a batch of tools of the same specification to ensure that the arc of the tool tip coincides with the axis of the rotating shaft 5 .

A method for using a tool negative chamfering fixture, the steps are as follows:

The first step, first, after the tool negative chamfering processing fixture is assembled, after fixing the base 15 on the stereo microscope worktable, hold the clamping pin 11 to rotate the clamping shaft 13, so that the rotating shaft base 9 can be rotated around. The clamping shaft 13 is rotated. Next, rotate the rotating shaft base 9 to make the rotating shaft 5 vertical, and then hold the clamping pin 11 again to rotate the clamping shaft 13 to fix the position of the rotating shaft base 9 . Finally, loosen the clamping bolts behind the tool clamping block 6, place the tool 7 on the figure-eight positioning baffle of the tool holder 1, and then rotate the tool clamping bolts to drive the tool clamping block 6 to clamp the tool.

The second step is to loosen the slider clamping bolt on the side of the middle slider 4, and adjust the position of the tool 7X relative to the rotating shaft by adjusting the first screw bolt 3; loosen the slider clamping bolt on the side of the upper slider 2 The position of the tool 7Y relative to the rotation axis can be adjusted by adjusting the second screw bolt 8. By adjusting the displacement of the tool 7 in the X and Y directions, it is ensured that the center of the arc of the tool nose of the tool 7 coincides with the axis of the rotating shaft 5 .

In the third step, after the center of the tool nose arc of tool 7 is adjusted to coincide with the axis of rotating shaft 5, rotate the slider clamping bolt on the side of the middle slider 4 to fix the position of tool 7 relative to the rotating shaft in the X direction; rotate the upper slider 2. The slider on the side clamps the bolt to fix the position of the tool 7 relative to the rotation axis in the Y direction; loosen the fixation of the base 15 on the stereo microscope worktable, and move the tool negative chamfering fixture to the ordinary grinder worktable. The fixed base 15 is fixed on the tool holder of a common grinder.

The fourth step is to hold the clamping pin 11 to rotate the clamping shaft 13, loosen the fixing of the rotating shaft base 9, and manually rotate the rotating shaft base 9 so that the rotating shaft 5 driven by it is at a certain angle with the vertical plane, and the size of the angle is The angle of the negative chamfering required to be ground is ensured by ensuring that the triangular top of the angle pointer 14 coincides with the angle scale on the base 15 to ensure the accuracy of the angle. The negative chamfering width to be ground is adjusted by the micro-feed mechanism of the ordinary grinding machine.

The fifth step is to carry out grinding. When grinding, rotate the crank handle 10 to ensure that the main and auxiliary cutting edges of the tool and the negative chamfering of the tool tip arc are ground. After grinding a tool, release the tool holder 6. After the clamping bolt is removed from the tool, the negative chamfering of the next tool is performed. Because the same batch of tools have the same specifications, there is no need to re-calibrate the tool. It is only necessary to install a new tool and then repeat the grinding.

The beneficial effects of the utility model are as follows: a negative chamfering grinding fixture of the utility model is designed, which can realize uniform grinding of the main and auxiliary cutting edges of the tool and the negative chamfering with a certain angle and width at the circular arc of the tool tip. On the one hand, it is convenient to use, and tools of the same specification can be processed in batches after one position adjustment; The utility model has the advantages of simple structure, convenient manufacture and use, and high negative chamfering quality of the grinding tool.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional structure in an embodiment of the present invention.

2 is a schematic axonometric view of the lower side of the structure of the position adjustment mechanism in the embodiment of the present utility model;

Fig. 3 is the axonometric schematic diagram of the upper side of the structure of the position adjustment mechanism in the embodiment of the present utility model;

FIG. 4 is a schematic diagram of the structure of the rotating shaft in the embodiment of the present invention.

Fig. 5 is the schematic diagram of the angle adjustment mechanism in the embodiment of the present utility model;

6 is a schematic diagram of the right side of the angle adjustment mechanism in the embodiment of the present utility model;

7 is a schematic structural diagram of the upper slider 2 in the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of the middle slider 4 in the embodiment of the present utility model;

9 is a schematic structural diagram of the second lead screw bolt 8 in the embodiment of the present utility model;

10 is a schematic structural diagram of the rotating shaft 5 in the embodiment of the present invention;

In the figure: tool holder 1, upper slider 2, first screw bolt 3, middle slider 4, rotating shaft 5, tool holder 6, tool 7, second screw bolt 8, rotating shaft base 9, crank handle 10 , Clamping pin 11, nylon sleeve 12, clamping shaft 13, angle pointer 14, base 15.

Detailed ways

The technical solutions of the present utility model will be further described below with reference to specific embodiments and accompanying drawings.

A tool negative chamfering processing fixture comprises a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism.

The position adjustment mechanism includes a tool rest 1 , an upper slider 2 , a first lead screw bolt 3 , an intermediate slider 4 , a rotating shaft 5 , a tool clamping block 6 , a tool 7 and a second lead screw bolt 8 .

The front side of the tool holder 1 is provided with a figure-eight positioning baffle plate for tool positioning and a cylindrical countersunk hole for the installation of the tool holder fixing bolts; the bottom of the tool holder 1 is provided with a T-shaped for installing the tool holder block 6 . The front end of the T-shaped groove communicates with the front side of the tool holder, the T-shaped groove is opposite to the opening direction of the figure-eight positioning baffle, and the top of the T-shaped groove is provided with a bolt hole for fixing the tool holder 6; the rear side of the tool holder 1 is provided with There is a positioning block for the positioning of the tool holder. The tool holder 1 needs to be replaced with different tool holders according to different tool types to be processed, so as to meet the needs of negative chamfer grinding of different tools.

The upper slider 2 is an irregular structure, and its front side is provided with a positioning groove for positioning the tool holder 1 and a bolt hole for fixing the tool holder 1; , the nut structure and the second screw bolt 8 can cooperate to move the upper slider 2 to drive the tool holder 1 to move in the Y direction;

The first lead screw bolt 3 is a hexagon socket bolt, and an annular semicircular groove is set near the bolt head for installing the first lead screw bolt 3 on the T-shaped slider at the front end of the rotating shaft 5 through the pin.

The middle slider 4 is an irregular structure, and its front end is provided with a rectangular slider. The rectangular slider can slide along the rectangular groove on the rear side of the upper slider 2. The rectangular slider is provided with a groove for installing the upper slider. The nut structure of 2, the front side of the rectangular slider is provided with a pin hole, and the second lead screw bolt 8 is fixedly installed through the pin column. There is a rectangular slot in the middle of the rear end of the middle slider 4, the rectangular slider at the front end is perpendicular to the rectangular slot at the rear end, and a nut structure is also arranged in the middle of the rectangular slot, and the nut structure and the first screw bolt 3 can cooperate with each other. The middle slider 4 drives the upper slider 2 and the tool holder 1 to move in the X direction; the side of the rectangular groove is provided with a bolt hole for installing a clamping bolt to fix the position of the T-shaped slider at the front end of the rotating shaft 5 in the rectangular groove.

The tool clamping block 6 is a T-shaped block. The tool clamping block 6 can slide along the T-shaped groove on the side of the tool holder 1. The front end of the T-shaped block is provided with a groove, which can realize the clamping of a quadrilateral tool; The edges are provided with corresponding chamfers to facilitate tool clamping.

The tool 7 is positioned by the figure-eight positioning baffle on the front end surface of the tool holder 1, and is fixed on the tool holder 1 by a tool holder 6 and an inner hexagon bolt.

The second lead screw bolt 8 is a hexagon socket head bolt, and an annular semicircular groove is set near the bolt head for mounting the second lead screw bolt 8 on the rectangular slide on the front end surface of the intermediate slider 4 through the pin. on the block.

The rotating shaft mechanism includes a rotating shaft 5 , a rotating shaft base 9 and a crank handle 10 .

The front end of the rotating shaft 5 is provided with a T-shaped sliding block, and the T-shaped sliding block can slide along the rectangular groove at the rear end of the intermediate sliding block 4; , The front side of the T-shaped slider is provided with a pin hole for installing the first screw bolt 3 . The middle part of the rotating shaft 5 is placed in the stepped through hole in the horizontal direction at the upper part of the rotating shaft base 9 , and after being placed, the rotating shaft 5 is pushed tightly by the nut in the horizontal direction. The rear end of the rotating shaft 5 is provided with a threaded through hole for installing the crank handle 10 .

The rotating shaft base 9 is a stepped rectangular block structure, the upper part of which is perpendicular to the direction of the front side face is provided with a stepped through hole. Smooth operation. The top of the rotating shaft base 9 is provided with a threaded hole, and a hexagon socket head bolt is installed to fix the rotating shaft 5 to prevent it from rotating when adjusting the position adjusting mechanism. There are through holes on the left and right sides of the stepped platform at the bottom of the rotating shaft base 9 for installing the clamping shaft 13 to fix the position of the rotating shaft base 9 .

The crank handle 10 is a conical cylindrical body with a stepped platform, and a thread is provided at the position where the diameter of the end portion is small, which is used for connecting with the rotating shaft 5 to drive the rotating shaft 5 to rotate. The crank handle 10 is used to increase the rotation radius of the rotating shaft 5 to facilitate the operator to rotate the rotating shaft 5 .

The stepped shaft at the rear of the rotating shaft 5 penetrates the stepped through hole of the rotating shaft base 9, and the rear end surface of the T-shaped slider at the front end of the rotating shaft 5 contacts the deep groove ball bearing matched with the front side of the stepped hole of the rotating shaft base 9 through a flat washer. The outer diameter is slightly smaller than the inner diameter of the outer ring of the deep groove ball bearing to ensure that the flat washer fits the inner ring of the deep groove ball bearing, so that the shaft 5 can rotate with the rotation of the inner ring of the deep groove ball bearing. The deep groove ball bearing matched with the rear side of the stepped hole of the rotating shaft base 9 is fitted with a thrust ball bearing, and the fastening bolts threaded with the middle of the rotating shaft 5 jointly ensure the fixing of the rotating shaft 5 .

The angle adjustment mechanism includes a clamping pin 11 , a nylon sleeve 12 , a clamping shaft 13 , an angle pointer 14 and a base 15 .

The clamping shaft 13 is a cylindrical shaft with two stepped platforms. The part with the smallest diameter at one end is provided with a thread, which passes through the step platform at the bottom of the rotating shaft base 9 to fix the clamping shaft 13 on the base 15; the part with the largest diameter at the other end is provided with a pin hole for installing the clamping pin 11 It is convenient for the operator to rotate the clamping shaft 13 ; the middle optical shaft part is used to cooperate with the rotating shaft base 9 to fix the position of the rotating shaft base 9 .

One end of the clamping pin 11 is a hemispherical head, the diameter of the hemispherical head is larger than the inner diameter of the pin hole of the clamping shaft 13 , the other end is an elliptical cylinder, and the middle part is a cylindrical structure. The middle of the clamping pin 11 passes through the pin hole of the clamping shaft 13 , and the hemispherical head and the tail of the elliptical column enable it to move up and down without breaking away from the clamping shaft 13 . The clamping pin 11 can make it convenient for the operator to rotate the clamping shaft 13 under the condition of its own small size.

The nylon sleeve 12 is a nylon material ring, which is installed between the clamping shaft 13 and the rotating shaft base block 9 to ensure that the surfaces of the two parts are not damaged during clamping.

The angle pointer 14 is an L-shaped angle iron. One side is triangular, and the angle determined by the rotation of the shaft base 9 is ensured by the coincidence of the triangular apex angle with the different angle scale lines on the left side of the base 15; the other side is provided with two threaded holes for the angle pointer. Installed on the shaft base 9 .

The left side of the base 15 is provided with a countersunk bolt hole for installing the clamping shaft 13 and fixing the position of the rotating shaft base 9; the left side is also provided with an angle scale, which is used to coincide with the triangular top of the angle pointer 14 Determine the rotation angle of the shaft base 9; the right side is provided with a wedge-shaped groove, and the rear side is provided with a pin hole, which is used to install a pin to clamp the ordinary grinder tool holder into the wedge-shaped groove, and fix the base 15 to the ordinary grinder. on the knife holder.

The position adjustment mechanism needs to be adjusted by means of a stereo microscope before processing a batch of tools of the same specification to ensure that the arc of the tool tip coincides with the axis of the rotating shaft 5 .

A method for using a tool negative chamfering fixture, the steps are as follows:

The first step, first, after the tool negative chamfering processing fixture is assembled, after fixing the base 15 on the stereo microscope worktable, hold the clamping pin 11 to rotate the clamping shaft 13, so that the rotating shaft base 9 can be rotated around. The clamping shaft 13 is rotated. Next, rotate the rotating shaft base 9 to make the rotating shaft 5 vertical, and then hold the clamping pin 11 again to rotate the clamping shaft 13 to fix the position of the rotating shaft base 9 . Finally, loosen the clamping bolts behind the tool clamping block 6, place the tool 7 on the figure-eight positioning baffle of the tool holder 1, and then rotate the tool clamping bolts to drive the tool clamping block 6 to clamp the tool.

The second step is to loosen the slider clamping bolt on the side of the middle slider 4, and adjust the position of the tool 7X relative to the rotating shaft by adjusting the first screw bolt 3; loosen the slider clamping bolt on the side of the upper slider 2 The position of the tool 7Y relative to the rotation axis can be adjusted by adjusting the second screw bolt 8. By adjusting the displacement of the tool 7 in the X and Y directions, it is ensured that the center of the arc of the tool nose of the tool 7 coincides with the axis of the rotating shaft 5 .

In the third step, after the center of the tool nose arc of tool 7 is adjusted to coincide with the axis of rotating shaft 5, rotate the slider clamping bolt on the side of the middle slider 4 to fix the position of tool 7 relative to the rotating shaft in the X direction; rotate the upper slider 2. The slider on the side clamps the bolt to fix the position of the tool 7 relative to the rotation axis in the Y direction; loosen the fixation of the base 15 on the stereo microscope worktable, and move the tool negative chamfering fixture to the ordinary grinder worktable. The fixed base 15 is fixed on the tool holder of a common grinder.

The fourth step is to hold the clamping pin 11 to rotate the clamping shaft 13, loosen the fixing of the rotating shaft base 9, and manually rotate the rotating shaft base 9 so that the rotating shaft 5 driven by it is at a certain angle with the vertical plane, and the size of the angle is The angle of the negative chamfering required to be ground is ensured by ensuring that the triangular top of the angle pointer 14 coincides with the angle scale on the base 15 to ensure the accuracy of the angle. The negative chamfering width to be ground is adjusted by the micro-feed mechanism of the ordinary grinding machine.

The fifth step is to carry out grinding. When grinding, rotate the crank handle 10 to ensure that the main and auxiliary cutting edges of the tool and the negative chamfering of the tool tip arc are ground. After grinding a tool, release the tool holder 6. After the clamping bolt is removed from the tool, the negative chamfering of the next tool is performed. Because the same batch of tools have the same specifications, there is no need to re-calibrate the tool. It is only necessary to install a new tool and then repeat the grinding.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (5)

1. a tool negative chamfering processing fixture, is characterized in that, described tool negative chamfering processing fixture comprises position adjustment mechanism, rotating shaft mechanism and angle adjustment mechanism; The position adjustment mechanism includes a tool holder (1), an upper sliding block (2), a first lead screw bolt (3), an intermediate sliding block (4), a rotating shaft (5), a tool clamping block (6), a tool ( 7) and the second screw bolt (8); the position adjustment mechanism needs to be adjusted through a stereo microscope before processing a batch of tools of the same specification to ensure that the arc of the tool tip coincides with the axis of the rotating shaft (5); The front side of the tool holder (1) is provided with a figure-eight positioning baffle plate for positioning the tool (7) and a cylindrical countersunk hole for installing the fixing bolt of the tool holder. After the tool (7) is positioned, the tool holder block (6) ) and the inner hexagon bolts are fixed on the tool holder (1); the bottom of the tool holder (1) is provided with a T-shaped groove for installing the tool holder (6), and the tool holder (6) can be along the side of the tool holder (1). The T-slot slides, the front end of the T-slot communicates with the front side of the tool holder, the T-slot is opposite to the opening direction of the figure-eight positioning baffle, and the top of the T-slot is provided with bolt holes for fixing the tool holder (6); The rear side of the frame (1) is provided with a positioning block for the installation and positioning of the tool holder; The front side of the upper slider (2) is provided with a positioning groove for positioning the tool holder (1) and a bolt hole for fixing the tool holder (1); a rectangular groove is provided at the rear, and a nut structure is arranged in the middle of the rectangular groove , the nut structure cooperates with the second screw bolt (8) to move the upper slider (2) to drive the tool holder (1) to move in the Y direction; and the upper slider (2) is fixed by the clamping bolt installed on the side of the rectangular groove ); The first lead screw bolt (3) is provided with an annular semicircular groove at a position close to the bolt head, which is used to install the first lead screw bolt (3) on the T-shaped slider at the front end of the rotating shaft (5). The second lead screw bolt (8) is provided with an annular semicircular groove near the bolt head, which is used to install the second lead screw bolt (8) on the rectangular slider on the front end surface of the intermediate slider (4); The front end of the middle sliding block (4) is provided with a rectangular sliding block that can slide along the rectangular groove on the rear side of the upper sliding block (2). The rectangular sliding block is provided with a groove for installing the nut of the upper sliding block (2). Structure, the front side of the rectangular slider is provided with a pin hole for fixing the second lead screw bolt (8); the middle slider (4) is provided with a rectangular slot in the middle of the rear end, and the rectangular slider at the front end and the rectangular slot at the rear end are located in space. Vertical, a nut structure is arranged in the middle of the rectangular groove, and the coordinated movement of the nut structure and the first lead screw bolt (3) enables the middle slider (4) to drive the upper slider (2) and the tool holder (1) to move along the X direction; Fix the position of the T-shaped slider at the front end of the rotating shaft (5) in the rectangular groove by clamping bolts installed on the side of the rectangular groove; The rotating shaft mechanism comprises a rotating shaft (5), a rotating shaft base (9) and a crank handle (10); The front end of the rotating shaft (5) is provided with a T-shaped sliding block, and the T-shaped sliding block can slide along the rectangular groove at the rear end of the intermediate sliding block (4). The front side of the T-shaped slider is provided with a pin hole for installing the first lead screw bolt (3); the rear end of the rotating shaft (5) is installed with a crank handle (10); The rotating shaft base (9) is a stepped rectangular block structure, including an upper stepped platform and a bottom stepped platform; the upper stepped platform is provided with a stepped through hole in the horizontal direction, and the middle of the rotating shaft (5) penetrates the stepped through hole; the rotating shaft base ( 9) There are threaded holes on the top, and a hexagon socket bolt is installed to fix the shaft (5) to prevent it from rotating when adjusting the position adjustment mechanism; deep groove ball bearings are installed on the front and rear sides of the stepped through holes to ensure that the shaft (5) is in working condition. The rear end surface of the T-shaped slider at the front end of the rotating shaft (5) is in contact with the deep groove ball bearing matched with the front side of the stepped hole of the rotating shaft base (9) through a flat washer, and the rotating shaft (5) rotates with the inner ring of the deep groove ball bearing. and rotate; the deep groove ball bearing matched with the rear side of the stepped through hole of the rotating shaft base (9) is fitted with a thrust ball bearing, and together with the nut in the middle of the rotating shaft (5), the fixing of the rotating shaft (5) is ensured; the bottom step platform A through hole is provided for installing the clamping shaft (13) to fix the position of the rotating shaft base (9), and two threaded holes are provided on the rear side of the bottom step platform for installing the angle pointer (14); The angle adjustment mechanism comprises a clamping pin (11), a nylon sleeve (12), a clamping shaft (13), an angle pointer (14) and a base (15); The clamping shaft (13) is a cylindrical shaft structure with two stepped platforms; the end with the smallest diameter is provided with a thread, and passes through the stepped platform at the bottom of the rotating shaft base (9) to fix the clamping shaft (13) on the bottom of the rotating shaft base (9). On the base (15); the end with the largest diameter is used to install the clamping pin (11) of the rotating clamping shaft (13); the middle optical axis part is used to cooperate with the rotating shaft base (9) to fix the rotating shaft base ( 9); The nylon sleeve (12) is a nylon material ring, which is installed between the clamping shaft (13) and the rotating shaft base (9) to ensure that the surfaces of the two parts are not damaged during clamping; The angle pointer (14) is an L-shaped angle iron; one side of which is in a triangular shape, and the rotation of the shaft base (9) is ensured by the coincidence of the triangular apex angle with the different angle scale lines on the left side of the base (15). angle; the other side is installed on the shaft base (9); A clamping shaft (13) is installed on the left side of the base (15) to fix the position of the rotating shaft base (9); an angle scale is also provided on the left side, which is used to coincide with the triangular top of the angle pointer (14). Determine the rotation angle of the rotating shaft base (9); the base (15) is fixed on a common grinder tool holder. 2 . The tool negative chamfering jig according to claim 1 , wherein the first lead screw bolt ( 3 ) and the second lead screw bolt ( 8 ) are all hexagon socket head bolts. 3 . 3. A tool negative chamfering fixture according to claim 1, wherein the tool holder block (6) is a T-shaped block structure, and the front end of the T-shaped block is provided with a groove for realizing a quadrilateral Tool clamping; the edges on both sides of the groove are provided with corresponding chamfers to facilitate tool clamping. 4. A tool for negative chamfering machining fixture according to claim 1, characterized in that, the rear end surface of the T-shaped slider at the front end of the rotating shaft (5) passes through the flat washer and the stepped hole of the rotating shaft base (9). The outer diameter of the flat washer is smaller than the inner diameter of the outer ring of the deep groove ball bearing to ensure that the flat washer fits the inner ring of the deep groove ball bearing, so that the rotating shaft (5) can follow the deep groove ball bearing. The inner ring rotates and rotates. 5. A tool for negative chamfering processing fixture according to claim 1, characterized in that, one end of the clamping pin (11) is a hemispherical head, and the diameter of the hemispherical head is larger than the inner diameter of the pin hole of the clamping shaft (13). , the other end is an elliptical column, and the middle is a cylindrical structure; the middle of the clamping pin (11) passes through the pin hole of the clamping shaft (13), and the hemispherical head and the tail of the elliptical column enable it to move up and down without breaking away from the clamping shaft (13).

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