CN110712075A - Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp - Google Patents
Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp Download PDFInfo
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- CN110712075A CN110712075A CN201911085271.0A CN201911085271A CN110712075A CN 110712075 A CN110712075 A CN 110712075A CN 201911085271 A CN201911085271 A CN 201911085271A CN 110712075 A CN110712075 A CN 110712075A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a negative chamfering machining clamp for a cutter and a using method of the negative chamfering machining clamp, and belongs to the field of machining. The device comprises a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism. The processing of the negative chamfer mainly depends on a special indexable tool numerical control precision grinder imported from abroad and a common grinder assisted by a special negative chamfer clamp at present. The negative chamfering ground by the aid of the foreign special indexable tool numerical control precision grinder has high precision, high quality and stability, but the equipment investment is large; while the common grinding machine using the special negative chamfering fixture for grinding in China has less equipment investment, but the ground negative chamfering has low precision and unstable quality, and the operation is inconvenient. The invention enlarges the processing range of the common grinding machine, so that the negative chamfer with higher precision and stable quality can be processed on the common grinding machine; meanwhile, the structure is simple, the operation is convenient, the machining production efficiency of the cutter is improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a negative chamfering machining clamp for a cutter and a using method of the negative chamfering machining clamp.
Background
The negative chamfer of the cutter is a negative rake angle plane with the width of about 0.1-0.2 mm ground at the cutting edge of the cutter, so that the wedge angle of the cutter is increased, the strength of the cutter is improved, and meanwhile, the heat dissipation condition is changed, and the durability of the cutter can be improved on the basis of strengthening the cutting edge and increasing the cutting force a little. The cutting edge strength is increased on a plurality of hard alloy cutters, ceramic cutters, PCBN cutters and various mechanically clamped cutters by adopting a negative chamfer grinding mode.
The processing of the negative chamfer mainly depends on a special indexable tool numerical control precision grinder imported from abroad and a common grinder assisted by a special negative chamfer clamp at present. Since the technical fortunes exist in the precision grinding advanced technology abroad, some foreign precision numerical control grinding machines are difficult to observe at all; the negative chamfering fixture designed by the self-help tool machining factory in China is relatively simple and has poor ground negative chamfering quality and inconvenient operation, so that the negative chamfering fixture is used for effectively and conveniently machining negative chamfers of various tools without using expensive foreign tool precision grinding machines, and the purpose is to design the negative chamfering grinding fixture for the tool, enlarge the machining range of a common grinding machine and enable the tool to grind negative chamfers with high quality on the common grinding machine.
Disclosure of Invention
The invention aims to solve the problems and provides a novel tool negative chamfer machining clamp.
The technical scheme adopted by the invention is as follows:
a negative chamfering machining clamp for a cutter comprises a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism.
The position adjusting mechanism comprises a tool rest 1, an upper slide block 2, a first lead screw bolt 3, a middle slide block 4, a rotating shaft 5, a tool clamping block 6, a tool 7 and a second lead screw bolt 8.
The front side surface of the tool rest 1 is provided with a splayed positioning baffle for positioning a tool and a cylindrical counter sink for installing a tool rest fixing bolt; the bottom of the tool rest 1 is provided with a T-shaped groove for installing the tool clamping block 6, the front end of the T-shaped groove is communicated with the front side surface of the tool rest, the T-shaped groove is opposite to the opening direction of the splayed positioning baffle, and the top of the T-shaped groove is provided with a bolt hole for fixing the tool clamping block 6; the rear side surface of the knife rest 1 is provided with a positioning block for installing and positioning the knife rest. The tool rest 1 needs to replace different tool rests according to different types of processed tools so as to meet the requirements of negative chamfering grinding of different tools.
The upper sliding block 2 is of an irregular structure, and the front side surface of the upper sliding block is provided with a positioning groove for positioning the tool rest 1 and a bolt hole for fixing the tool rest 1; the rear part of the rectangular groove is provided with a rectangular groove, the middle of the rectangular groove is provided with a nut structure, and the nut structure and a second screw bolt 8 are matched to move so that the upper sliding block 2 drives the tool rest 1 to move along the Y direction; the rectangular channel side is equipped with the bolt hole, installation clamping bolt for fixed top shoe 2.
First lead screw bolt 3 is a hexagon socket head cap screw, and it is close to bolt head position and establishes an annular half slot for install first lead screw bolt 3 on the T shape slider of 5 front ends of pivot through the round pin post.
The cutter clamping block 6 is a T-shaped block, the cutter clamping block 6 can slide along a T-shaped groove in the side face of the cutter rest 1, and a groove is formed in the front end of the T-shaped block, so that clamping of a quadrilateral cutter can be realized; the edges at the two sides of the groove are provided with corresponding chamfers to facilitate the clamping of a cutter.
The cutter 7 is positioned through a splayed positioning baffle on the front end face of the cutter rest 1 and is fixed on the cutter rest 1 through a cutter clamping block 6 and an inner hexagon bolt.
The second lead screw bolt 8 is a hexagon socket head cap screw, and an annular semicircular groove is formed in the position, close to the bolt head, of the second lead screw bolt 8 and is used for installing the second lead screw bolt 8 on the rectangular sliding block on the front end face of the middle sliding block 4 through a pin column.
The rotating shaft mechanism comprises a rotating shaft 5, a rotating shaft base 9 and a crank 10.
The front end of the rotating shaft 5 is provided with a T-shaped sliding block which can slide along a rectangular groove at the rear end of the middle sliding block 4; a groove is formed in the middle of the T-shaped sliding block and used for being matched with a nut structure of the middle sliding block 4, and a pin hole is formed in the front side face of the T-shaped sliding block and used for installing the first lead screw bolt 3. The middle part of the rotating shaft 5 is placed in a stepped through hole in the horizontal direction at the upper part of the rotating shaft base 9, and after the rotating shaft 5 is placed, the rotating shaft is pushed tightly in the horizontal direction through a nut. The rear end of the rotating shaft 5 is provided with a threaded through hole for mounting the crank 10.
The rotating shaft base 9 is of a stepped rectangular block structure, a stepped through hole is formed in the upper portion of the rotating shaft base and is perpendicular to the front side face direction, the diameters of the front side face and the rear side face of the stepped through hole are large, the deep groove ball bearings are used for being mounted, and stable operation of the rotating shaft 5 under the working condition is guaranteed. The top of the rotating shaft base 9 is provided with a threaded hole, and a hexagon socket head cap screw is arranged for fixing the rotating shaft 5 to prevent the rotating shaft from rotating when the position adjusting mechanism is adjusted. The left side and the right side of a step platform at the bottom of the rotating shaft base 9 are provided with through holes for installing clamping shafts 13, the position of the rotating shaft base 9 is fixed, and the rear side of the step platform at the bottom is provided with two threaded holes for installing angle pointers 14.
The crank 10 is a conical cylinder provided with a step table, and a thread is arranged at the position with smaller diameter size at the end part and is used for being connected with the rotating shaft 5 to drive the rotating shaft 5 to rotate. The crank 10 is used for increasing the rotating radius of the rotating shaft 5, and an operator can conveniently rotate the rotating shaft 5.
5 middle parts of pivot run through the ladder through-hole of pivot base 9, 5 front end T shape slider rear end faces of pivot are through the contact of plain washer and 9 ladder hole front sides complex deep groove ball bearings of pivot base, and the plain washer external diameter size slightly is less than the internal diameter size of deep groove ball bearing outer lane, guarantees that the plain washer laminates mutually with the inner circle of deep groove ball bearing for pivot 5 can be rotatory along with the deep groove ball bearing inner circle. The deep groove ball bearing matched with the rear side of the stepped hole of the rotating shaft base 9 is attached to a thrust ball bearing, and the fixing of the rotating shaft 5 is ensured together with a fastening bolt in threaded fit with the middle part of the rotating shaft 5.
The angle adjusting 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 provided with two steps. A thread is arranged at the part with the minimum diameter at one end of the clamping shaft, and the clamping shaft 13 is fixed on the base 15 after penetrating through the step platform at the bottom of the rotating shaft base 9; the part with the largest diameter at the other end is provided with a pin hole for installing a clamping pin 11 so as to facilitate the rotation of the clamping shaft 13 by an operator; the middle optical axis part is used for matching 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 a pin column hole of the clamping shaft 13, the other end of the clamping pin is an elliptic column, and the middle part of the clamping pin is of a cylindrical structure. The middle part of the clamping pin 11 passes through a pin column hole of the clamping shaft 13, and the semi-spherical head and the elliptic cylindrical tail part enable the clamping pin to move up and down without departing from the clamping shaft 13. The clamping pin 11 can be made small in size to facilitate the rotation of the clamping shaft 13 by the operator.
The nylon sleeve 12 is a nylon ring and is arranged 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 indicator 14 is an L-shaped angle iron. One side of the rotating shaft base is triangular, and the determined angle of rotation of the rotating shaft base 9 is ensured by the coincidence of the vertex angle of the triangle and the scale lines with different angles on the left side surface of the base 15; and two threaded holes are formed in the other side of the rotating shaft base 9 and used for installing the angle pointer.
A countersunk bolt hole is formed in the left side surface of the base 15 and used for installing the clamping shaft 13 and fixing the position of the rotating shaft base 9; the left side surface is also provided with angle scales which are used for determining the rotating angle of the rotating shaft base 9 by being coincided with the triangular tip of the angle pointer 14; the right side surface is provided with a wedge-shaped groove, the rear side surface is provided with a pin hole for installing a pin to clamp the common grinder tool rest into the wedge-shaped groove, and the base 15 is fixed on the common grinder tool rest.
The position adjusting mechanism needs to be adjusted by means of a stereoscopic microscope before a batch of cutters with the same specification are processed, and the coincidence of the circular arc of the cutter point of the cutter and the axis of the rotating shaft 5 is guaranteed.
A use method of a tool negative chamfering machining clamp comprises the following steps:
first, after the assembly of the tool negative chamfer machining jig is completed and the base 15 is fixed on the stereoscopic microscope table, the clamping pin 11 is held by hand to rotate the clamping shaft 13, so that the rotating shaft base 9 can rotate around the clamping shaft 13. Next, the spindle base 9 is rotated to erect the spindle 5, and then the clamp pin 11 is again held to rotate the clamp shaft 13, thereby fixing the position of the spindle base 9. And finally, loosening the clamping bolt behind the cutter clamping block 6, placing the cutter 7 on the splayed positioning baffle of the tool rest 1, and then rotating the cutter clamping bolt to drive the cutter clamping block 6 to clamp the cutter.
Secondly, loosening a slide block clamping bolt on the side surface of the middle slide block 4, and adjusting the position of the cutter 7X direction relative to the rotating shaft by adjusting the first lead screw bolt 3; and releasing the slide block clamping bolt on the side surface of the upper slide block 2, and adjusting the position of the cutter 7Y relative to the rotating shaft by adjusting the second lead screw bolt 8. The center of the arc of the tool point of the tool 7 is ensured to be coincided with the axis of the rotating shaft 5 by adjusting the displacement of the tool 7X, Y.
Thirdly, after the center of the arc of the tool nose of the tool 7 is adjusted to coincide with the axis of the rotating shaft 5, rotating a slide block clamping bolt on the side surface of the middle slide block 4, and fixing the position of the tool 7 relative to the rotating shaft in the X direction; rotating a slide block clamping bolt on the side surface of the upper slide block 2, and fixing the position of the cutter 7 relative to the rotating shaft in the Y direction; and (3) loosening the fixation of the base 15 on the stereoscopic microscope workbench, moving the tool negative chamfering machining clamp to the workbench of a common grinding machine, and fixing the base 15 on a tool rest of the common grinding machine.
Fourthly, holding the clamping pin 11 by hand to rotate the clamping shaft 13, loosening the fixation of the rotating shaft base 9, manually rotating the rotating shaft base 9 to enable the rotating shaft 5 driven by the rotating shaft base to form a certain angle with the vertical surface, wherein the angle is the angle of the negative chamfer to be ground, and ensuring the accuracy of the angle by ensuring the superposition of the triangular tip of the angle pointer 14 and the angle scale on the base 15. The width of the ground negative chamfer is adjusted by a micro-feeding mechanism of a common grinding machine.
And fifthly, grinding is carried out, the crank 10 is rotated during grinding to ensure negative chamfering grinding of the main and auxiliary cutting edges and the arc part of the tool nose of the tool, and after one tool is ground, the clamping bolt after the tool clamping block 6 is loosened is dismounted from the tool, and then negative chamfering grinding of the next tool is carried out. The same specification of the same batch of tools does not need to be re-set, and only a new tool needs to be installed and then grinding is repeated.
The invention has the beneficial effects that: the negative chamfer grinding clamp can realize uniform grinding of negative chamfers with certain angular widths at the main and auxiliary cutting edges and the arc of the tool nose of the tool. On one hand, the cutter is convenient to use, and the cutters of the same specification can be processed in batches after being subjected to primary position adjustment; on the other hand, the cutter is positioned by the cutter clamping block, the clamping is convenient, and the batch production and processing efficiency is high. The invention has simple structure, convenient manufacture and use and higher negative chamfering quality of the grinding tool.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
FIG. 2 is a schematic axial view of the lower side of the position adjustment mechanism structure in an embodiment of the present invention;
FIG. 3 is a schematic side view of the position adjustment mechanism structure according to an embodiment of the present invention;
fig. 4 is a schematic view of a rotating shaft structure in the embodiment of the invention.
FIG. 5 is a schematic view of an angle adjustment mechanism according to an embodiment of the present invention;
FIG. 6 is a right side view of an angle adjustment mechanism in an embodiment of the present invention;
fig. 7 is a schematic structural view of the upper slide 2 in the embodiment of the present invention;
FIG. 8 is a schematic structural diagram of the middle slider 4 according to the embodiment of the present invention;
FIG. 9 is a schematic structural view of a second lead screw bolt 8 according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a rotating shaft 5 according to an embodiment of the present invention;
in the figure: the device comprises a tool rest 1, an upper sliding block 2, a first lead screw bolt 3, a middle sliding block 4, a rotating shaft 5, a tool clamping block 6, a tool 7, a second lead screw bolt 8, a rotating shaft base 9, a crank 10, a clamping pin 11, a nylon sleeve 12, a clamping shaft 13, an angle pointer 14 and a base 15.
Detailed Description
The technical solution of the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
A negative chamfering machining clamp for a cutter comprises a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism.
The position adjusting mechanism comprises a tool rest 1, an upper slide block 2, a first lead screw bolt 3, a middle slide block 4, a rotating shaft 5, a tool clamping block 6, a tool 7 and a second lead screw bolt 8.
The front side surface of the tool rest 1 is provided with a splayed positioning baffle for positioning a tool and a cylindrical counter sink for installing a tool rest fixing bolt; the bottom of the tool rest 1 is provided with a T-shaped groove for installing the tool clamping block 6, the front end of the T-shaped groove is communicated with the front side surface of the tool rest, the T-shaped groove is opposite to the opening direction of the splayed positioning baffle, and the top of the T-shaped groove is provided with a bolt hole for fixing the tool clamping block 6; the rear side surface of the knife rest 1 is provided with a positioning block for installing and positioning the knife rest. The tool rest 1 needs to replace different tool rests according to different types of processed tools so as to meet the requirements of negative chamfering grinding of different tools.
The upper sliding block 2 is of an irregular structure, and the front side surface of the upper sliding block is provided with a positioning groove for positioning the tool rest 1 and a bolt hole for fixing the tool rest 1; the rear part of the rectangular groove is provided with a rectangular groove, the middle of the rectangular groove is provided with a nut structure, and the nut structure and a second screw bolt 8 are matched to move so that the upper sliding block 2 drives the tool rest 1 to move along the Y direction; the rectangular channel side is equipped with the bolt hole, installation clamping bolt for fixed top shoe 2.
First lead screw bolt 3 is a hexagon socket head cap screw, and it is close to bolt head position and establishes an annular half slot for install first lead screw bolt 3 on the T shape slider of 5 front ends of pivot through the round pin post.
The cutter clamping block 6 is a T-shaped block, the cutter clamping block 6 can slide along a T-shaped groove in the side face of the cutter rest 1, and a groove is formed in the front end of the T-shaped block, so that clamping of a quadrilateral cutter can be realized; the edges at the two sides of the groove are provided with corresponding chamfers to facilitate the clamping of a cutter.
The cutter 7 is positioned through a splayed positioning baffle on the front end face of the cutter rest 1 and is fixed on the cutter rest 1 through a cutter clamping block 6 and an inner hexagon bolt.
The second lead screw bolt 8 is a hexagon socket head cap screw, and an annular semicircular groove is formed in the position, close to the bolt head, of the second lead screw bolt 8 and is used for installing the second lead screw bolt 8 on the rectangular sliding block on the front end face of the middle sliding block 4 through a pin column.
The rotating shaft mechanism comprises a rotating shaft 5, a rotating shaft base 9 and a crank 10.
The front end of the rotating shaft 5 is provided with a T-shaped sliding block which can slide along a rectangular groove at the rear end of the middle sliding block 4; a groove is formed in the middle of the T-shaped sliding block and used for being matched with a nut structure of the middle sliding block 4, and a pin hole is formed in the front side face of the T-shaped sliding block and used for installing the first lead screw bolt 3. The middle part of the rotating shaft 5 is placed in a stepped through hole in the horizontal direction at the upper part of the rotating shaft base 9, and after the rotating shaft 5 is placed, the rotating shaft is pushed tightly in the horizontal direction through a nut. The rear end of the rotating shaft 5 is provided with a threaded through hole for mounting the crank 10.
The rotating shaft base 9 is of a stepped rectangular block structure, a stepped through hole is formed in the upper portion of the rotating shaft base and is perpendicular to the front side face direction, the diameters of the front side face and the rear side face of the stepped through hole are large, the deep groove ball bearings are used for being mounted, and stable operation of the rotating shaft 5 under the working condition is guaranteed. The top of the rotating shaft base 9 is provided with a threaded hole, and a hexagon socket head cap screw is arranged for fixing the rotating shaft 5 to prevent the rotating shaft from rotating when the position adjusting mechanism is adjusted. The left side and the right side of a step platform at the bottom of the rotating shaft base 9 are provided with through holes for installing clamping shafts 13, the position of the rotating shaft base 9 is fixed, and the rear side of the step platform at the bottom is provided with two threaded holes for installing angle pointers 14.
The crank 10 is a conical cylinder provided with a step table, and a thread is arranged at the position with smaller diameter size at the end part and is used for being connected with the rotating shaft 5 to drive the rotating shaft 5 to rotate. The crank 10 is used for increasing the rotating radius of the rotating shaft 5, and an operator can conveniently rotate the rotating shaft 5.
The stepped shaft at the rear part of the rotating shaft 5 penetrates through the stepped through hole of the rotating shaft base 9, the rear end face of the T-shaped sliding block 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 the flat gasket, the outer diameter of the flat gasket is slightly smaller than the inner diameter of the outer ring of the deep groove ball bearing, the flat gasket is guaranteed to be attached to the inner ring of the deep groove ball bearing, and the rotating shaft 5 can rotate along with the rotation of. The deep groove ball bearing matched with the rear side of the stepped hole of the rotating shaft base 9 is attached to a thrust ball bearing, and the fixing of the rotating shaft 5 is ensured together with a fastening bolt in threaded fit with the middle part of the rotating shaft 5.
The angle adjusting 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 provided with two steps. A thread is arranged at the part with the minimum diameter at one end of the clamping shaft, and the clamping shaft 13 is fixed on the base 15 after penetrating through the step platform at the bottom of the rotating shaft base 9; the part with the largest diameter at the other end is provided with a pin hole for installing a clamping pin 11 so as to facilitate the rotation of the clamping shaft 13 by an operator; the middle optical axis part is used for matching 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 a pin column hole of the clamping shaft 13, the other end of the clamping pin is an elliptic column, and the middle part of the clamping pin is of a cylindrical structure. The middle part of the clamping pin 11 passes through a pin column hole of the clamping shaft 13, and the semi-spherical head and the elliptic cylindrical tail part enable the clamping pin to move up and down without departing from the clamping shaft 13. The clamping pin 11 can be made small in size to facilitate the rotation of the clamping shaft 13 by the operator.
The nylon sleeve 12 is a nylon ring and is arranged 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 indicator 14 is an L-shaped angle iron. One side of the rotating shaft base is triangular, and the determined angle of rotation of the rotating shaft base 9 is ensured by the coincidence of the vertex angle of the triangle and the scale lines with different angles on the left side surface of the base 15; and two threaded holes are formed in the other side of the rotating shaft base 9 and used for installing the angle pointer.
A countersunk bolt hole is formed in the left side surface of the base 15 and used for installing the clamping shaft 13 and fixing the position of the rotating shaft base 9; the left side surface is also provided with angle scales which are used for determining the rotating angle of the rotating shaft base 9 by being coincided with the triangular tip of the angle pointer 14; the right side surface is provided with a wedge-shaped groove, the rear side surface is provided with a pin hole for installing a pin to clamp the common grinder tool rest into the wedge-shaped groove, and the base 15 is fixed on the common grinder tool rest.
The position adjusting mechanism needs to be adjusted by means of a stereoscopic microscope before a batch of cutters with the same specification are processed, and the coincidence of the circular arc of the cutter point of the cutter and the axis of the rotating shaft 5 is guaranteed.
A use method of a tool negative chamfering machining clamp comprises the following steps:
first, after the assembly of the tool negative chamfer machining jig is completed and the base 15 is fixed on the stereoscopic microscope table, the clamping pin 11 is held by hand to rotate the clamping shaft 13, so that the rotating shaft base 9 can rotate around the clamping shaft 13. Next, the spindle base 9 is rotated to erect the spindle 5, and then the clamp pin 11 is again held to rotate the clamp shaft 13, thereby fixing the position of the spindle base 9. And finally, loosening the clamping bolt behind the cutter clamping block 6, placing the cutter 7 on the splayed positioning baffle of the tool rest 1, and then rotating the cutter clamping bolt to drive the cutter clamping block 6 to clamp the cutter.
Secondly, loosening a slide block clamping bolt on the side surface of the middle slide block 4, and adjusting the position of the cutter 7X direction relative to the rotating shaft by adjusting the first lead screw bolt 3; and releasing the slide block clamping bolt on the side surface of the upper slide block 2, and adjusting the position of the cutter 7Y relative to the rotating shaft by adjusting the second lead screw bolt 8. The center of the arc of the tool point of the tool 7 is ensured to be coincided with the axis of the rotating shaft 5 by adjusting the displacement of the tool 7X, Y.
Thirdly, after the center of the arc of the tool nose of the tool 7 is adjusted to coincide with the axis of the rotating shaft 5, rotating a slide block clamping bolt on the side surface of the middle slide block 4, and fixing the position of the tool 7 relative to the rotating shaft in the X direction; rotating a slide block clamping bolt on the side surface of the upper slide block 2, and fixing the position of the cutter 7 relative to the rotating shaft in the Y direction; and (3) loosening the fixation of the base 15 on the stereoscopic microscope workbench, moving the tool negative chamfering machining clamp to the workbench of a common grinding machine, and fixing the base 15 on a tool rest of the common grinding machine.
Fourthly, holding the clamping pin 11 by hand to rotate the clamping shaft 13, loosening the fixation of the rotating shaft base 9, manually rotating the rotating shaft base 9 to enable the rotating shaft 5 driven by the rotating shaft base to form a certain angle with the vertical surface, wherein the angle is the angle of the negative chamfer to be ground, and ensuring the accuracy of the angle by ensuring the superposition of the triangular tip of the angle pointer 14 and the angle scale on the base 15. The width of the ground negative chamfer is adjusted by a micro-feeding mechanism of a common grinding machine.
And fifthly, grinding is carried out, the crank 10 is rotated during grinding to ensure negative chamfering grinding of the main and auxiliary cutting edges and the arc part of the tool nose of the tool, and after one tool is ground, the clamping bolt after the tool clamping block 6 is loosened is dismounted from the tool, and then negative chamfering grinding of the next tool is carried out. The same specification of the same batch of tools does not need to be re-set, and only a new tool needs to be installed and then grinding is repeated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The fixture for machining the negative chamfer of the cutter is characterized by comprising a position adjusting mechanism, a rotating shaft mechanism and an angle adjusting mechanism;
the position adjusting mechanism comprises a tool rest (1), an upper sliding block (2), a first lead screw bolt (3), a middle sliding block (4), a rotating shaft (5), a tool clamping block (6), a tool (7) and a second lead screw bolt (8); the position adjusting mechanism needs to be adjusted through a stereoscopic microscope before a batch of cutters with the same specification are processed, and the coincidence of the circular arc of the cutter point of the cutter and the axis of the rotating shaft (5) is ensured;
the front side surface of the tool rest (1) is provided with a splayed positioning baffle for positioning a tool (7) and a cylindrical counter bore for mounting a tool rest fixing bolt, and the tool (7) is fixed on the tool rest (1) through a tool clamping block (6) and an inner hexagon bolt after being positioned; the bottom of the tool rest (1) is provided with a T-shaped groove for installing the tool clamping block (6), the tool clamping block (6) can slide along the T-shaped groove on the side surface of the tool rest (1), the front end of the T-shaped groove is communicated with the front side surface of the tool rest, the T-shaped groove is opposite to the opening direction of the splayed positioning baffle plate, and the top of the T-shaped groove is provided with a bolt hole for fixing the tool clamping block (6); a positioning block for installing and positioning the tool rest is arranged on the rear side surface of the tool rest (1);
the front side surface of the upper sliding block (2) is provided with a positioning groove for positioning the tool rest (1) and a bolt hole for fixing the tool rest (1); the rear part of the rectangular groove is provided with a rectangular groove, the middle of the rectangular groove is provided with a nut structure, and the nut structure and a second screw bolt (8) are matched to move so that the upper sliding block (2) drives the tool rest (1) to move along the Y direction; the upper sliding block (2) is fixed through a clamping bolt arranged on the side surface of the rectangular groove;
an annular semicircular groove is formed in the position, close to the bolt head, of the first lead screw bolt (3) and used for installing the first lead screw bolt (3) on a T-shaped sliding block at the front end of the rotating shaft (5); an annular semicircular groove is formed in the position, close to the bolt head, of the second lead screw bolt (8) and used for installing the second lead screw bolt (8) on the rectangular sliding block on the front end face of the middle sliding block (4);
the front end of the middle sliding block (4) is provided with a rectangular sliding block which can slide along a rectangular groove on the rear side surface of the upper sliding block (2), a groove is formed in the rectangular sliding block and used for installing a nut structure of the upper sliding block (2), and the front side surface of the rectangular sliding block is provided with a pin hole for fixedly installing a second lead screw bolt (8); a rectangular groove is formed in the middle of the rear end of the middle sliding block (4), the rectangular sliding block at the front end is perpendicular to the rectangular groove at the rear end in spatial position, a nut structure is arranged in the middle of the rectangular groove, and the nut structure and the first lead screw bolt (3) are matched to move so that the middle sliding block (4) drives the upper sliding block (2) and the tool rest (1) to move along the X direction; the position of a T-shaped sliding block at the front end of the rotating shaft (5) in the rectangular groove is fixed through a clamping bolt arranged on the side surface of the rectangular groove;
the rotating shaft mechanism comprises a rotating shaft (5), a rotating shaft base (9) and a crank (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 a rectangular groove at the rear end of the middle sliding block (4); a groove matched with the nut structure of the middle sliding block (4) is formed in the middle of the T-shaped sliding block, and a pin hole is formed in the front side face of the T-shaped sliding block and used for mounting a first lead screw bolt (3); a crank (10) is arranged at the rear end of the rotating shaft (5);
the rotating shaft base (9) is of a stepped rectangular block structure and comprises an upper stepped platform and a bottom stepped platform; a step through hole is formed in the upper step platform in the horizontal direction, and the middle of the rotating shaft (5) penetrates through the step through hole; the top of the rotating shaft base 9 is provided with a threaded hole, and an inner hexagon bolt is arranged for fixing the rotating shaft 5 to prevent the rotating shaft from rotating when the position adjusting mechanism is adjusted; deep groove ball bearings are arranged on the front side and the rear side of the stepped through hole to ensure the stable operation of the rotating shaft (5) under the working condition, the rear end face of a T-shaped sliding block at the front end of the rotating shaft (5) is contacted with the deep groove ball bearing matched with the front side of the stepped hole of the rotating shaft base (9) through a flat gasket, and the rotating shaft (5) rotates along with the rotation of an inner ring of the deep groove ball bearing; a deep groove ball bearing matched with the rear side of the stepped through hole of the rotating shaft base (9) is attached to a thrust ball bearing, and the fixing of the rotating shaft (5) is ensured together with a nut in the middle of the rotating shaft (5); the bottom step platform is provided with a through hole for installing a clamping shaft (13) and fixing the position of the rotating shaft base (9), and the rear side surface of the bottom step platform is provided with two threaded holes for installing angle pointers (14);
the angle adjusting 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 of a cylindrical shaft structure provided with two steps; the end with the smallest diameter is provided with a thread and penetrates through the step table at the bottom of the rotating shaft base (9) to fix the clamping shaft (13) on the base (15); the end with the largest diameter is used for installing a clamping pin (11) of a rotary clamping shaft (13); the middle optical axis part is used for matching with the rotating shaft base (9) to fix the rotating shaft base (9);
the nylon sleeve (12) is a nylon material circular ring and is arranged 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 the rotating shaft base is triangular, and the determined angle of rotation of the rotating shaft base (9) is ensured by the coincidence of the vertex angle of the triangle and the scale marks of different angles on the left side surface of the base (15); the other side is arranged on a rotating shaft base (9);
a clamping shaft (13) is arranged on the left side surface of the base (15) to fix the position of the rotating shaft base (9); the left side surface is also provided with angle scales which are used for determining the rotating angle of the rotating shaft base (9) by being coincided with the triangular tip of the angle pointer (14); the base (15) is fixed on a common grinder rest.
2. The negative chamfering tool fixture according to claim 1, wherein the first lead screw bolt (3) and the second lead screw bolt (8) are both hexagon socket head cap screws.
3. The negative chamfering machining clamp of the cutter as claimed in claim 1, wherein the cutter clamping block (6) is of a T-shaped block structure, and the front end of the T-shaped block is provided with a groove for clamping a quadrilateral cutter; the edges at the two sides of the groove are provided with corresponding chamfers to facilitate the clamping of a cutter.
4. The negative chamfering fixture of the cutter as claimed in claim 1, wherein the rear end face of the T-shaped slider at the front end of the rotating shaft (5) is contacted 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 smaller than the inner diameter of the outer ring of the deep groove ball bearing, the flat washer is ensured to be attached to the inner ring of the deep groove ball bearing, and the rotating shaft (5) can rotate along with the rotation of the inner ring of the deep groove ball bearing.
5. The negative chamfering tool fixture as claimed in claim 1, wherein 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 cylinder hole of the clamping shaft (13), the other end of the clamping pin is an elliptic cylinder, and the middle part of the clamping pin is of a cylindrical structure; the middle part of the clamping pin (11) passes through a pin hole of the clamping shaft (13), and the semi-spherical head and the elliptic cylinder tail part enable the clamping pin to move up and down without separating from the clamping shaft (13).
6. The use method of the tool negative chamfer machining fixture according to any one of claims 1 to 5, characterized by comprising the following steps:
firstly, after the tool negative chamfering machining clamp is assembled, fixing a base (15) on a stereoscopic microscope workbench, holding a clamping pin (11) by hand to rotate a clamping shaft (13), and enabling a rotating shaft base (9) to rotate around the clamping shaft (13); secondly, rotating the rotating shaft base (9) to enable the rotating shaft (5) to be vertical, then holding the clamping pin (11) again to rotate the clamping shaft (13), and fixing the position of the rotating shaft base (9); finally, loosening the clamping bolt behind the cutter clamping block (6), placing the cutter (7) on the splayed positioning baffle of the tool rest (1), and rotating the cutter clamping bolt to drive the cutter clamping block (6) to clamp the cutter;
secondly, loosening a slide block clamping bolt on the side surface of the middle slide block (4), and adjusting the position of the cutter (7) in the X direction relative to the rotating shaft by adjusting the first screw bolt (3); loosening a slide block clamping bolt on the side surface of the upper slide block (2), and adjusting the position of the cutter (7) in the Y direction relative to the rotating shaft by adjusting a second lead screw bolt (8); the center of the arc of the tool point of the tool (7) is ensured to coincide with the axle center of the rotating shaft (5) by adjusting the displacement of the tool (7) X, Y;
thirdly, after the center of the arc of the tool point of the tool (7) is adjusted to coincide with the axis of the rotating shaft (5), rotating a sliding block clamping bolt on the side surface of the middle sliding block (4) and fixing the position of the tool (7) relative to the rotating shaft in the X direction; rotating a slide block clamping bolt on the side surface of the upper slide block (2) and fixing the position of the cutter (7) relative to the rotating shaft in the Y direction; loosening the fixing of the base (15) on the stereoscopic microscope workbench, moving the negative chamfering fixture of the cutter to the workbench of a common grinding machine, and fixing the base (15) on a tool rest of the common grinding machine;
fourthly, holding the clamping pin (11) by hand to rotate the clamping shaft (13), loosening the fixation of the rotating shaft base (9), manually rotating the rotating shaft base (9), further enabling the rotating shaft (5) driven by the rotating shaft base to form a certain angle with the vertical surface, wherein the angle is the angle of the negative chamfer to be ground, and ensuring the accuracy of the angle by ensuring the superposition of the triangular tip of the angle pointer (14) and the angle scale on the base (15); the width of the ground negative chamfer is adjusted by a micro-feeding mechanism of a common grinding machine;
fifthly, grinding is carried out, the crank (10) is rotated during grinding to ensure that the main and auxiliary cutting edges of the cutter and the negative chamfer grinding at the arc position of the cutter point, and after one cutter is ground, a clamping bolt after a cutter clamping block (6) is loosened is dismounted from the cutter, and then the negative chamfer grinding of the next cutter is carried out; the same specification of the same batch of cutters does not need to be adjusted again, and only a new cutter needs to be installed and then grinding is repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085271.0A CN110712075A (en) | 2019-11-08 | 2019-11-08 | Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085271.0A CN110712075A (en) | 2019-11-08 | 2019-11-08 | Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110712075A true CN110712075A (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911085271.0A Pending CN110712075A (en) | 2019-11-08 | 2019-11-08 | Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp |
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| CN (1) | CN110712075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114310539A (en) * | 2020-10-12 | 2022-04-12 | 太原科技大学 | Bar chamfering robot system and method |
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2019
- 2019-11-08 CN CN201911085271.0A patent/CN110712075A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114310539A (en) * | 2020-10-12 | 2022-04-12 | 太原科技大学 | Bar chamfering robot system and method |
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