CN117505940A - Full-automatic precise drilling and chamfering tool and use method thereof - Google Patents
Full-automatic precise drilling and chamfering tool and use method thereof Download PDFInfo
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- CN117505940A CN117505940A CN202210897584.1A CN202210897584A CN117505940A CN 117505940 A CN117505940 A CN 117505940A CN 202210897584 A CN202210897584 A CN 202210897584A CN 117505940 A CN117505940 A CN 117505940A
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- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 66
- 238000003754 machining Methods 0.000 claims description 24
- 238000004080 punching Methods 0.000 claims description 10
- 238000013459 approach Methods 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 24
- 238000010586 diagram Methods 0.000 description 7
- 201000005947 Carney Complex Diseases 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
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- 238000007514 turning Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/08—Drills combined with tool parts or tools for performing additional working
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Abstract
The invention relates to a full-automatic precise drilling and chamfering tool and a using method thereof, and the full-automatic precise drilling and chamfering tool comprises a cutter shaft, a cutter bar and a cutter body, wherein the cutter body extends to one side far away from the axis of the cutter shaft, and a first cutting edge is arranged on one side of the cutter body facing the cutter shaft; the maximum distance between the first cutting edge and the axis of the cutter shaft is marked as A, the maximum distance between the cutter body and the cutter bar in the direction vertical to the axis of the cutter shaft is marked as B, the radius of a machined hole is marked as R, the length of a chamfer angle predicted by the machined hole is marked as C, the chamfer angle predicted by the machined hole is marked as D, and the inclination angle of the first cutting edge and the direction vertical to the axis of the cutter shaft is marked as D'; b <2R, R+C.ltoreq.A, D=D'. According to the invention, the novel cutter is designed to enable the cutter to enter the processed workpiece in a staggered manner, so that the cutter rotates along the spindle of the machine tool randomly and can finish the processing of the chamfer inside the hole at one time in cooperation with the movement of the spindle of the machine tool along the axis direction of the hole, and the processing speed is improved.
Description
Technical Field
The invention relates to the technical field of numerical control machining of parts, in particular to a full-automatic precise drilling and chamfering tool and a using method thereof.
Background
The numerical control precision machining is also called CNC machining, is a common device for high-precision machining of modern industrial parts, and is a machining method for precisely cutting the parts by automatic programming on a computer and linkage with an automatic machine tool.
In the related art, along with popularization and development of CNC processing, the complexity and precision of part design are gradually improved, and part products which need special processing technology to be manufactured, such as parts which are punched on a middle hole closed part and are chamfered at the inner end of the hole, are gradually appeared in the market, at present, a CNC processing center generally punches a hole on processing equipment of the parts through a cutter, then the cutter is replaced, a small-diameter cutter is inserted into the hole, a main shaft of the cutter starts to rotate and the main shaft moves along a circle of the circular outline of the hole, so that the cutter rotates and revolves around the axis of the hole, and internal chamfering processing is completed. The equipment processing action steps are as follows: 1) The spindle moves to the position of the axis of the hole and moves downwards to enable the cutter to enter the hole; 2) The main shaft drives the cutter to start rotating; 3) The spindle is horizontally displaced, so that the cutter is contacted with the cut position to start cutting; 4) The main shaft takes the axis of the hole as the shaft to do circular motion for at least one circle, and the cutter feeds and cuts the workpiece along the annular track; 5) After chamfering cutting is completed, the main shaft horizontally moves to the position of the axis of the hole and moves upwards to enable the cutter to withdraw from the hole. Considering that the required cut size of part of the workpiece is larger or the hardness of the workpiece is higher, the steps 3) and 4) need to be repeated, so that the cutting amount reaches the standard.
In view of the above-mentioned related art, the inventor believes that in the mass production and processing of parts, the conventional CNC processing of the motion trail of the chamfer spindle in the hole of the closed part is complex in calculation, has high requirements on the precision of the machine tool, and has very limited processing speed due to the long motion trail of the spindle, so that in order to improve productivity and enterprise efficiency, a structure and a method capable of processing the chamfer in the closed part more rapidly are needed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a full-automatic precision drilling and chamfering tool and a use method thereof, by designing a novel tool, the tool can be staggered into a workpiece to be processed, after further translating and adjusting the position of a spindle, the tool can be rotated along a spindle of a random lathe and matched with the matching of the spindle of the machine tool moving along the axis direction of the hole to finish the processing of the chamfer inside the hole at one time, the movement track of the spindle of the machine tool is simplified, and the processing can be finished at one time when the machining is performed in a large cutting amount, so as to solve the problems of low productivity and high requirement on the machine tool in the prior art.
To achieve the above and other related objects, in one aspect, the present invention provides a full-automatic precision drilling and chamfering tool, including a cutter shaft, a cutter bar and a cutter body, wherein the cutter bar is located at one end of the cutter shaft, the cutter body is located at one end of the cutter bar away from the cutter shaft, the cutter body extends to one side away from the axis of the cutter shaft, and a first cutting edge is provided at one side of the cutter body towards the cutter shaft; the maximum distance between the first cutting edge and the axis of the cutter shaft is marked as A, the maximum distance between the cutter body and the cutter bar in the direction vertical to the axis of the cutter shaft is marked as B, the radius of a machined hole is marked as R, the length of a predicted chamfer angle side of the machined hole is marked as C, the predicted chamfer angle of the machined hole is marked as D, and the inclination angle between the first cutting edge and the axis direction vertical to the cutter shaft is marked as D'; and B is less than 2R, R+C is less than or equal to A, and D=D'.
Further, the cross section size of one end, connected with the cutter bar, of the cutter shaft is gradually changed gradually until the cross section size of the position, connected with the cutter bar, of the cutter shaft is the same.
Further, the length direction of the cutter bar is parallel to the axis of the cutter shaft.
Further, the connection position of the cutter bar and the cutter shaft deviates from the axis of the cutter shaft.
Further, a second cutting edge is arranged on one side, far away from the cutter shaft, of the cutter body, the maximum distance between the second cutting edge and the axis of the cutter shaft in the direction perpendicular to the axis of the cutter shaft is marked as E, the minimum distance is marked as E ', the radius of a machined hole is marked as R', E=R ', and E' =0.
On the other hand, the invention provides a use method of a full-automatic precise drilling and chamfering tool, which comprises the following steps: s1, mounting the cutter shaft on a machine tool spindle, setting the rotation turns of the machine tool spindle to be integers, and positioning a workpiece to be processed; s2, the machine tool spindle and the workpiece relatively move to enable the machine tool spindle to be located at a machining position, wherein the distance between the axis of the machine tool spindle and the axis of a machined hole is marked as F, the axis of the machined hole is located at one side of the axis of a cutter shaft, which faces the cutter body, and A-R < F < R+A-B; s3, feeding a machine tool spindle or a workpiece along the axial direction of the machine tool spindle until the cutter body completely passes through the machined hole, and then translating the machine tool spindle or the workpiece to enable the axis of the machine tool spindle to coincide with the axis of the machined hole; s4, the machine tool spindle starts to rotate, and meanwhile, the machine tool spindle moves towards the outer side of the hole along the depth direction of the machined hole by means of relative movement of the machine tool spindle and the workpiece, so that the first cutting edge contacts the workpiece to realize cutting action until the cutting quantity reaches the preset machining size; s5, stopping rotation of the machine tool spindle, and enabling the machine tool spindle or a workpiece to be positioned at a machining position again by a translation distance F of the machine tool spindle or the workpiece; s6, the machine tool spindle and the workpiece relatively move, so that the cutter body and the cutter bar exit the workpiece to be processed along the axis of the hole to be processed.
Further, in step S5, before the rotation of the machine tool spindle is stopped, the machine tool spindle or the workpiece is moved, and the machine tool spindle is first relatively moved toward the inside of the workpiece along the axial direction of the hole to be machined, so that the first cutting edge is separated from the machined surface of the workpiece to be machined.
Further, in step S2, f=a-B/2.
Further, in step S2, during the movement of the machine tool spindle or the workpiece to position the machine tool spindle at the machining position, the machine tool spindle or the workpiece is first moved from the initial position to a position where the axis coincides with the axis of the hole to be machined, and then the machine tool spindle or the workpiece is translated by a distance F to position the axis of the hole to be machined on the side of the arbor axis toward the cutter body.
Further, S1a, a main shaft or a workpiece of the machine tool moves to enable the main shaft to be located at a preset punching position, and at the moment, the axis of the main shaft of the machine tool is aligned with the axis of preset punching; s1b, starting to rotate a machine tool spindle, and enabling the machine tool spindle to move relative to a workpiece, so that the machine tool spindle approaches the workpiece along the axis direction, and further enabling a second cutting edge to contact the workpiece, and performing cutting action of drilling; and S1c, after the drilling processing is finished, the machine tool spindle and the workpiece relatively move, so that the cutter bar and the cutter body withdraw from the workpiece along the axis of the processed hole.
As described above, the present invention has at least the following advantageous effects:
1. in the actual machining process, the cutter shaft is connected with the main shaft of the machine tool, the cutter body stretches into a machined hole during cutting, and the first cutting edge of the cutter body completes chamfering cutting machining. The cutter body and the cutter body are eccentrically arranged on the cutter shaft, when the axis of the cutter shaft is coincident with the axis of a machined hole, the position of the first cutting edge corresponds to the chamfering cutting position of the machined hole, and the first cutting edge rotates by taking the axis of the machined hole as an axis when the cutter shaft rotates along with a main shaft of a machine tool, so that chamfering cutting action is realized;
2. the cross section size of the joint of the cutter shaft and the cutter body is gradually changed, so that the strength of the joint is improved, the possibility of stress concentration is reduced, and the possibility of fracture of the joint of the cutter is greatly reduced;
3. the cutter body and the axis of the cutter shaft extend in parallel, so that the axial load bearing capacity of the cutter can be improved, the space utilization rate of the cutter in the direction perpendicular to the axis is improved, and the applicability of the cutter is improved;
4. through setting up the second blade, make the cutter body carry out punching processing to the work piece under the vertical circumstances of feeding of main shaft, realize that a sword is multi-purpose, further simplify the processing technology step of part.
Drawings
Fig. 1 is a schematic structural diagram of a cutter according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram showing a relationship between a tool size parameter and a machined hole size parameter in accordance with a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cutter according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram showing a relationship between a tool size parameter and a machined hole size parameter in a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a cutter according to a third embodiment of the present invention.
Fig. 6 is a schematic structural diagram for showing a relationship between a cutter size parameter and a predetermined perforation size parameter in a third embodiment of the present invention.
Fig. 7 is a schematic diagram of the dimensional relationship among the cutter body, the cutter shaft, the cutter bar and the machined hole when the cutter body passes through the machined hole in the fourth embodiment of the present invention.
Reference numerals illustrate:
1. a cutter shaft; 2. a cutter bar; 3. a cutter body; 4. a first cutting edge; 5. and a second cutting edge.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Referring to fig. 1 to 6, an embodiment of the present invention discloses a full-automatic drilling and chamfering tool.
Example 1
Referring to fig. 1 and 2, a full-automatic drilling and chamfering tool comprises a cutter shaft 1, a cutter bar 2 and a cutter body 3, wherein the cutter shaft 1 is used for being connected with a main shaft of a machine tool, the cutter bar 2 is positioned at one end of the cutter shaft 1, the cutter bar 2 extends along the axial direction of the cutter shaft 1 towards one end far away from the cutter shaft 1, the length direction of the cutter bar 2 is parallel to the axial direction of the cutter shaft 1, and the cross section size of one end, connected with the cutter bar 2, of the cutter shaft 1 is gradually changed until the cross section size of the joint of the cutter bar and the cutter bar 2 is the same, so that the possibility of breakage of the tool caused by stress concentration at the joint is reduced. The cutter body 3 is located the one end that cutter arbor 2 kept away from arbor 1, and the cutter body 3 extends to the one side that keeps away from arbor 1 axis, and the one side that cutter body 3 was provided with first blade 4 towards arbor 1, and first blade 4 is used for processing the interior chamfer of closed part.
The maximum distance between the first cutting edge 4 and the axis of the cutter shaft 1 is denoted as A, the radius of the machined hole is denoted as R, and the length of the expected chamfer right-angle side of the machined hole is denoted as C. When the cutter shaft 1 rotates along with the main shaft of the machine tool, the actual length of the cutter body 3 can be longer than the inclined plane of the expected chamfer of the machined hole because the rotary cutting track of the cutter body 3 is matched with the chamfer and the actual chamfer depth is controlled by the circumferential feed of the main shaft of the machine tool, so R+C is less than or equal to A;
the predicted chamfer size of the machined hole is marked as D, the included angle between the first cutting edge 4 and the direction vertical to the axis of the cutter shaft 1 is D ', and the axis of the cutter shaft 1 coincides with the axis of the machined hole during machining, so that the cutter angle is required to be matched with the machined chamfer angle, and D=D';
the maximum distance between the cutter body 3 and the cutter bar 2 in the direction perpendicular to the axis of the cutter shaft 1 is denoted as B, which is the maximum dimension of the part of the cutter that can extend into the workpiece in the horizontal direction, and B <2R is defined in order to allow the cutter body 3 to pass through the machined hole and extend into the inner side of the workpiece.
The implementation principle of the embodiment 1 is as follows:
when the main shaft of the machine tool rotates, the whole cutter rotates along with the axis of the cutter shaft 1, the connecting position between the cutter bar 2 and the cutter shaft 1 deviates from the axis of the cutter shaft 1, so that the cutter bar 2 and the cutter shaft 1 are arranged in a staggered mode, because the cutter body 3 is arranged on the cutter bar 2, the cutter body 3 only extends to one side far away from the axis of the cutter shaft 1, the cutter bar 2 and the cutter body 3 have smaller lengths in the direction perpendicular to the axis of the cutter shaft 1 when the cutter rotates, the cutter bar 2 and the cutter body 3 can pass through holes with smaller radius before the main shaft of the machine tool rotates and enable the cutter body 3 to enter the workpiece, the axis of the cutter shaft 1 coincides with the axis of a machined hole when machining, the cutting track of the cutter body 3 is matched with the outline of the hole to directly cut, at the moment, the main shaft only needs to axially move, the movement track is simple, the machining speed is influenced by the cutting amount, and the workpiece can be machined more efficiently.
The cross section size of the joint of the cutter shaft 1 and the cutter body 3 is gradually changed, so that the strength of the joint is improved, the possibility of stress concentration is reduced, and the possibility of fracture of the joint of the cutter is greatly reduced.
The cutter body 3 and the axis of the cutter shaft 1 extend in parallel, so that the axial load bearing capacity of the cutter can be improved, the space utilization rate of the cutter in the direction perpendicular to the axis is improved, and the applicability of the cutter is improved.
Example 2
A full-automatic drilling and chamfering tool is different from embodiment 1 in that, referring to fig. 3 and 4, the connection position between the cutter bar 2 and the cutter shaft 1 is deviated from the axial center of the cutter shaft 1.
The implementation principle of the embodiment 2 is as follows:
through the eccentric arrangement of the connection position between the cutter bar 2 and the cutter shaft 1, the distance between the cutter body 3 and the axis of the cutter shaft 1 can be larger under the condition that the lengths of the cutter bar 2 and the cutter body 3 in the direction perpendicular to the axis of the cutter shaft 1 are shorter, and further, a larger turning radius can be obtained.
On the other hand, through the eccentric arrangement of the cutter bar 2, the length of the cutter body 3 is shortened, the torque born by the joint of the cutter body 3 and the guide rod is reduced, the damage of the cutter is reduced, and the service life of the cutter is prolonged.
Example 3
A full-automatic drilling and chamfering tool, which is different from embodiment 2 in that, referring to fig. 5 and 6, a second cutting edge 5 is provided at one end of the tool body 3 away from the arbor 1, and the second cutting edge 5 is used for punching and cutting a workpiece.
The maximum distance between the second cutting edge 5 and the axis of the arbor 1 in the direction perpendicular to the axis of the arbor 1 is denoted as E, the minimum distance is denoted as E ', the radius of the machined hole is denoted as R', e=r ', and E' =0.
The implementation principle of the embodiment 3 is as follows:
the second cutting edge 5 is arranged on one side, far away from the cutter shaft 1, of the cutter body 3, so that the cutter has a chamfering function and also has the function of punching a workpiece, the multipurpose of one cutter is realized, the processing speed is further improved, and the processing flow is simplified.
When punching by the tool, the cutting length of the second cutting edge 5 needs to cover at least the radius of the machined hole, so the distance between the second cutting edge 5 and the axis of the arbor 1 should be equal to the radius of the machined hole, i.e. e=r ', and the shortest distance between the second cutting edge 5 and the axis of the arbor 1 should be 0, i.e. E' =0.
The embodiment of the invention also discloses a use method of the full-automatic precise drilling and chamfering tool.
Example 4
Referring to fig. 3 and 4, a method of using a full-automatic precision drilling and chamfering tool, comprising the steps of,
the cutter may be any one of the cutters described in embodiment 1, embodiment 2 or embodiment 3, and the cutter described in embodiment 2 is used in this embodiment.
S1, mounting the cutter shaft 1 on a machine tool spindle, setting the rotation turns of the machine tool spindle to be integers, and positioning a workpiece to be processed;
s2, referring to FIG. 7, the machine tool spindle and the workpiece relatively move to enable the machine tool spindle to be located at a machining position, wherein the specific moving method is that the machine tool spindle or the workpiece moves to a position with an axis coincident with the axis of a machined hole from an initial position firstly, then the machine tool spindle or the workpiece translates by a distance F to enable the axis of the machined hole to be located at one side of the axis of a cutter shaft 1 towards a cutter body 3, at the moment, the distance between the axis of the machine tool spindle and the axis of the machined hole is recorded as F, and the axis of the machined hole is located at one side of the axis of the cutter shaft 1 towards the cutter body 3, and A-R < R+A-B are arranged, so that collision between the cutter body 3 and a hole wall is avoided in the process that the cutter shaft 1 and the cutter body 3 extend into a member;
in this embodiment, the numerical value is f=b/2- (B-ase:Sub>A) =ase:Sub>A-B/2, so that the cutter bar 2 and the cutter body 3 are integrally located at the center of the hole;
s3, feeding a machine tool spindle or a workpiece along the axial direction of the machine tool spindle until the cutter body 3 completely passes through the machined hole, and then translating the machine tool spindle or the workpiece to enable the axis of the machine tool spindle to coincide with the axis of the machined hole;
s4, the machine tool spindle starts to rotate, and simultaneously the machine tool spindle and the workpiece relatively move to enable the machine tool spindle to move to the outer side of a hole along the depth direction of the machined hole, so that the first cutting edge 4 is in contact with the workpiece to realize cutting action until the cutting quantity reaches the preset machining size;
s5, the machine tool spindle or the workpiece moves, so that the machine tool spindle moves relatively towards the inside of the workpiece to be processed along the axial direction of the hole to be processed, the first cutting edge 4 is separated from the processing surface of the workpiece to be processed, the conditions that the cutter body 3 is contacted with the processing surface to be processed and is collided and scratched in the rotation stopping process of the machine tool spindle are reduced, then the machine tool spindle stops rotating, and the translation distance F of the machine tool spindle or the workpiece enables the machine tool spindle to be located at the processing position again;
s6, the machine tool spindle and the workpiece relatively move, so that the cutter body 3 and the cutter bar 2 exit from the workpiece along the axis of the machined hole.
In step S1, the machine tool needs to meet several requirements, and at least one of the machine tool spindle and the stage for positioning the workpiece can perform the following actions: 1. the machine tool spindle and the part can relatively reciprocate along the axial direction of the machine tool spindle; 2. the machine tool spindle and the part can relatively reciprocate along one direction perpendicular to the axis of the machine tool spindle.
In addition, the spindle of the machine tool needs to be capable of completing the rotation motion of which the number of rotation turns is an integer, so that the relative position relationship between the cutter body 3 and the axis is kept consistent when the spindle stops rotating every time.
The selectable machine tools can be machining centers with three or more shafts and drilling machines with translatable spindles, and the embodiment selects the drilling machine with translatable spindles as the selected machine tool, so that in the steps S1-S5, the workpiece is kept stationary, and the translational movement of the spindle of the machine tool completes the relative movement of the spindle of the machine tool and the workpiece.
When the cutter shaft 1 is connected with the machine tool spindle, the cutter body 3 and the axis of the machine tool spindle are positioned in a plane which can translate the machine tool spindle.
The implementation principle of the embodiment 4 is as follows:
before the cutter bar 2 and the cutter body 3 enter a machined hole, the machine tool spindle is enabled to translate by a distance F, so that the cutter body 3 and the cutter are prevented from being bent, and the cutter body 3 and the cutter bar 2 are prevented from being contacted with the hole wall in the process that the cutter enters a workpiece.
In the actual machining process, the cutter shaft 1 is connected with the main shaft of the machine tool, the cutter body 3 stretches into a machined hole during cutting, and the first cutting edge 4 of the cutter body 3 completes chamfering cutting machining. The cutter body 3 and the cutter body 3 are eccentrically arranged on the cutter shaft 1, when the axis of the cutter shaft 1 is coincident with the axis of a machined hole, the position of the first cutting edge 4 corresponds to the chamfering cutting position of the machined hole, and the first cutting edge 4 rotates by taking the axis of the machined hole as the axis when the cutter shaft 1 rotates along the spindle of a machine tool, so that chamfering cutting action is realized.
Example 5
The use method of the full-automatic precise drilling and chamfering tool is different from embodiment 4 in that the tool described in embodiment 3 is adopted, and the method further comprises the following steps between the step S1 and the step S2:
s1a, a main shaft or a workpiece of a machine tool moves to enable the main shaft to be located at a preset punching position, and at the moment, the axis of the main shaft of the machine tool is aligned with the axis of preset punching;
s1b, starting to rotate a machine tool spindle, and enabling the machine tool spindle to move relative to a workpiece, so that the machine tool spindle approaches the workpiece along the axis direction, and further enabling the second cutting edge 5 to contact the workpiece to perform cutting action of drilling;
and S1c, after the drilling is finished, the machine tool spindle and the workpiece relatively move, so that the cutter bar 2 and the cutter body 3 exit the workpiece along the axis of the machined hole.
The implementation principle of the embodiment 5 is as follows:
through setting up the second blade 5, make cutter body 3 can punch the processing to the work piece under the vertical feed's of main shaft condition, realize that a sword is multi-purpose, further simplify the processing technology step of part, promote production speed.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A full-automatic precision drilling and chamfering tool is characterized in that: the cutter comprises a cutter shaft (1), a cutter bar (2) and a cutter body (3), wherein the cutter bar (2) is positioned at one end of the cutter shaft (1), the cutter body (3) is positioned at one end of the cutter bar (2) far away from the cutter shaft (1), the cutter body (3) extends to one side far away from the axis of the cutter shaft (1), and a first cutting edge (4) is arranged at one side of the cutter body (3) facing the cutter shaft (1);
the maximum distance between the first cutting edge (4) and the axis of the cutter shaft (1) is marked as A, the maximum distance between the cutter body (3) and the cutter bar (2) in the direction perpendicular to the axis of the cutter shaft (1) is marked as B, the radius of a machined hole is marked as R, the length of a predicted chamfer right-angle side of the machined hole is marked as C, the predicted chamfer angle of the machined hole is marked as D, and the inclination angle between the first cutting edge (4) and the axis direction perpendicular to the cutter shaft (1) is marked as D';
and B is less than 2R, R+C is less than or equal to A, and D=D'.
2. The fully automatic precision drilling and chamfering tool as recited in claim 1, further comprising: the cross section size of one end, connected with the cutter bar (2), of the cutter shaft (1) gradually changes gradually until the cross section size of the joint of the cutter bar (2) is the same.
3. A fully automatic precision drilling and chamfering tool as recited in claim 2, further characterized by: the length direction of the cutter bar (2) is parallel to the axis of the cutter shaft (1).
4. The fully automatic precision drilling and chamfering tool as recited in claim 1, further comprising: the connecting position of the cutter bar (2) and the cutter shaft (1) deviates from the axis of the cutter shaft (1).
5. The method of using a fully automatic precision drilling and chamfering tool as recited in claim 1, comprising the steps of:
s1, mounting the cutter shaft (1) on a machine tool spindle, setting the rotation turns of the machine tool spindle to be integers, and positioning a processed workpiece;
s2, the machine tool spindle and the workpiece relatively move to enable the machine tool spindle to be located at a machining position, wherein the distance between the axis of the machine tool spindle and the axis of a machined hole is marked as F, the axis of the machined hole is located at one side of the axis of a cutter shaft (1) facing the cutter body (3), and A-R < F < R+A-B;
s3, feeding a machine tool spindle or a workpiece along the axial direction of the machine tool spindle until the cutter body (3) completely passes through the machined hole, and then translating the machine tool spindle or the workpiece to enable the axis of the machine tool spindle to coincide with the axis of the machined hole;
s4, the machine tool spindle starts to rotate, and simultaneously the machine tool spindle and the workpiece relatively move to enable the machine tool spindle to move to the outer side of a hole along the depth direction of the machined hole, so that the first cutting edge (4) is in contact with the workpiece to realize cutting action until the cutting quantity reaches the preset machining size;
s5, stopping rotation of the machine tool spindle, and enabling the machine tool spindle or a workpiece to be positioned at a machining position again by a translation distance F of the machine tool spindle or the workpiece;
s6, the machine tool spindle and the workpiece relatively move, so that the cutter body (3) and the cutter bar (2) exit from the workpiece along the axis of the machined hole.
6. The method for using a fully automatic precision drilling and chamfering tool as recited in claim 5, wherein: in step S5, before the rotation of the machine tool spindle is stopped, the machine tool spindle or the workpiece is moved, and the machine tool spindle is first moved relatively toward the inside of the workpiece along the axial direction of the hole to be machined, so that the first cutting edge (4) is separated from the machined surface of the workpiece to be machined.
7. The method for using a fully automatic precision drilling and chamfering tool as recited in claim 5, wherein: in step S2, f=a-B/2.
8. The method for using a fully automatic precision drilling and chamfering tool as recited in claim 5, wherein: in step S2, during the movement of the machine tool spindle or the workpiece to position the machine tool spindle in the machining position, the machine tool spindle or the workpiece is first moved from the initial position to a position where the axis coincides with the axis of the hole to be machined, and then the machine tool spindle or the workpiece is translated by a distance F to position the axis of the hole to be machined on the side of the axis of the arbor (1) toward the cutter body (3).
9. The fully automatic precision drilling and chamfering tool as recited in claim 1, further comprising: the cutter body (3) is provided with a second cutting edge (5) on one side far away from the cutter shaft (1), wherein the maximum distance between the second cutting edge (5) and the axis of the cutter shaft (1) in the direction perpendicular to the axis of the cutter shaft (1) is marked as E, the minimum distance is marked as E ', the radius of a machined hole is marked as R', E=R ', and E' =0.
10. The method of using a fully automatic precision drilling and chamfering tool as recited in claim 9, comprising the steps of:
s1a, a main shaft or a workpiece of a machine tool moves to enable the main shaft to be located at a preset punching position, and at the moment, the axis of the main shaft of the machine tool is aligned with the axis of preset punching;
s1b, starting to rotate a machine tool spindle, and enabling the machine tool spindle to move relative to a workpiece, so that the machine tool spindle approaches the workpiece along the axis direction, and further enabling a second cutting edge (5) to contact the workpiece to perform cutting action of drilling;
s1c, after drilling is finished, the machine tool spindle and the workpiece relatively move, so that the cutter bar (2) and the cutter body (3) exit the workpiece along the axis of the machined hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210897584.1A CN117505940A (en) | 2022-07-28 | 2022-07-28 | Full-automatic precise drilling and chamfering tool and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210897584.1A CN117505940A (en) | 2022-07-28 | 2022-07-28 | Full-automatic precise drilling and chamfering tool and use method thereof |
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| Publication Number | Publication Date |
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| CN117505940A true CN117505940A (en) | 2024-02-06 |
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| CN202210897584.1A Pending CN117505940A (en) | 2022-07-28 | 2022-07-28 | Full-automatic precise drilling and chamfering tool and use method thereof |
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| Country | Link |
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| CN (1) | CN117505940A (en) |
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