CN114289764B - Combined cutter for processing blind end stepped hole - Google Patents
Combined cutter for processing blind end stepped hole Download PDFInfo
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- CN114289764B CN114289764B CN202210060234.XA CN202210060234A CN114289764B CN 114289764 B CN114289764 B CN 114289764B CN 202210060234 A CN202210060234 A CN 202210060234A CN 114289764 B CN114289764 B CN 114289764B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention provides a combined cutter for processing blind end stepped holes, which comprises a cutter bar, wherein the working end of the cutter bar is provided with a containing groove, a blade for processing the blind end stepped holes is hinged in the containing groove, an elastic mechanism for controlling the blade to rotate is arranged in the containing groove, and the outer side of the cutter bar is sleeved with a sleeve; the sleeve is provided with a notch corresponding to the accommodating groove, and the cutting end of the blade rotates to the outside of the notch to process the blind end stepped hole; and a limiting piece for limiting the moving position of the sleeve is further arranged on the sleeve. The combined cutter for processing the blind end stepped hole can be used for processing the blind end stepped hole in a closed or non-opened area rapidly and conveniently, and can meet the connection requirement of a novel blind end single-side installation fastener when being matched with a special blind end stepped hole fastener, and the connection reliability of connected products can be greatly improved.
Description
Technical Field
The invention belongs to the technical field of fastener assembly, and particularly relates to a combined cutter for processing a blind end stepped hole.
Background
In the fields of aerospace, navigation and the like, the requirements of different parts on the connecting pairs are different, some connecting pairs have high tensile properties, some parts have high fatigue resistance, some parts have extremely excellent sealing properties and the like, the connecting pairs with different performance requirements have strict special requirements on the fastening pieces, meanwhile, the connecting pairs have higher requirements on the structural form and the precision of the connecting holes, and the performance of the connecting pairs can reach the optimal design requirements only when the mounting holes and the fastening pieces reach the optimal matching form.
In the fields of aerospace, marine equipment assembly and the like, certain connected parts are totally-enclosed areas or unopened parts, blind-end single-sided mounting fasteners are required to be used, in recent years, along with the design development of models, certain newly designed blind-end mounting fasteners are required to be matched with blind-end stepped holes for mounting so as to achieve the optimal mounting effect, the blind-end stepped holes are difficult to process all the time, the rejection rate is high, and the whole part is extremely easy to discard;
therefore, aiming at a blind end fastener which needs to be matched with a stepped hole for installation, a combined cutter for processing the blind end stepped hole is provided.
Disclosure of Invention
In view of the above, the invention aims to provide a combined cutter for processing a blind end step hole, which solves the problems of low processing precision and high rejection rate of the blind end step hole.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the combined cutter for processing the blind end stepped hole comprises a cutter bar, wherein the working end of the cutter bar is provided with a containing groove, a blade for processing the blind end stepped hole is hinged in the containing groove, an elastic mechanism for controlling the blade to rotate is arranged in the containing groove, and the outer side of the cutter bar is sleeved with a sleeve;
the sleeve is provided with a notch corresponding to the accommodating groove, and the cutting end of the blade rotates to the outside of the notch to process the blind end stepped hole;
and a limiting piece for limiting the moving position of the sleeve is further arranged on the sleeve.
Further, a plurality of anti-slip grooves for preventing the cutter from axially moving in the cutting process are uniformly formed in the clamping end of the cutter bar, and a rotary driving groove is formed in the end part of the clamping end;
the depth of the containing groove arranged at the working end of the cutter bar is correspondingly equal to the thickness of the cutter blade.
Further, a blade fixing pin hole penetrating through the cutter bar is formed in the accommodating groove, a blade fixing pin is arranged in the blade fixing pin hole, and the blade is hinged with the blade fixing pin;
the bottom end of the blade is of an arc-shaped structure, and the top end of the blade is obliquely arranged;
the bottom end of the blade is provided with a setting groove, and a hook claw is fixedly arranged in the setting groove.
Further, the elastic mechanism comprises a spring, a spring fixing pin hole penetrating through the cutter bar is formed in the accommodating groove, a spring fixing pin is installed in the spring fixing pin hole, the fixed end of the spring is connected with the spring fixing pin, the movable end of the spring is connected with a rubber ring, and the other end of the rubber ring is connected with a hook claw arranged at the bottom end of the blade.
Further, the sleeve is of a hollow cylindrical structure, a notch arranged on the sleeve is a rectangular groove-shaped notch, a hole is formed in the end, far away from the notch, of the sleeve in a penetrating mode, a cutter ejection position locking hole and a cutter contraction position locking hole corresponding to the hole are formed in the outer wall of the cutter bar, and a sliding groove for the limiting piece to move is formed between the cutter ejection position locking hole and the cutter contraction position locking hole;
the limiting piece is arranged in a hole formed in the sleeve.
Further, the diameters of the cutter ejecting position locking hole and the cutter contracting position locking hole are equal to the diameters of the holes;
the depth of the locking hole at the tool ejection position is equal to that of the locking hole at the tool contraction position, and the locking hole is larger than that of the sliding groove.
Furthermore, the limiting piece is a clamp spring, and tail ends of two sides of the clamp spring are correspondingly inserted into holes penetrating through the sleeve.
Compared with the prior art, the combined cutter for processing the blind end stepped hole has the following beneficial effects:
(1) The combined cutter for processing the blind end stepped hole can be used for processing the blind end stepped hole in a closed or non-opened area rapidly and conveniently, and can meet the connection requirement of a novel blind end single-side installation fastener when being matched with a special blind end stepped hole fastener, and the connection reliability of connected products can be greatly improved;
(2) The combined cutter for processing the blind end stepped hole solves the problems of low processing precision and high rejection rate of the blind end stepped hole, and has the characteristics of high processing precision, high processing efficiency, simplicity and easiness in operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a plan view showing a combined cutter for blind end stepped hole machining according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a combined cutter for processing a blind end stepped hole according to an embodiment of the present invention;
FIG. 3 is a schematic view of a cutter bar according to an embodiment of the present invention;
FIG. 4 is a schematic plan view of a tool bar according to an embodiment of the present invention;
FIG. 5 is a schematic view of a sleeve according to an embodiment of the present invention;
FIG. 6 is a schematic view of a blade according to an embodiment of the present invention;
FIG. 7 is a front view of a snap spring according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a combined tool motion process for processing a blind end stepped hole according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a first working condition machining process according to an embodiment of the invention;
FIG. 10 is a schematic diagram of a first working condition after machining according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a second working condition machining process according to an embodiment of the invention;
fig. 12 is a schematic diagram of a second working condition after machining according to an embodiment of the invention.
Reference numerals illustrate:
1-a cutter bar; 101-a containing groove; 102-an anti-skid groove; 103-a rotary drive slot; 104-blade fixing pin holes; 105-spring fixation pin holes; 106-a cutter ejection position locking hole; 107-retracting the cutter to lock the hole; 108-a chute; 2-blade; 201-setting a groove; 202-claw; 3-sleeve; 301-notch; 302-holes; 4-a spring; 5-rubber rings; 6-clamping springs; 7-a blade fixing pin; 8-spring fixing pins.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 and 2, a combined cutter for processing a blind end stepped hole comprises a cutter bar 1, wherein the working end of the cutter bar 1 is of a smooth columnar structure, a containing groove 101 is formed in the working end of the cutter bar 1, a blade 2 for processing the blind end stepped hole is hinged in the containing groove 101, an elastic mechanism for controlling the blade 2 to rotate is arranged in the containing groove 101, and a sleeve 3 is sleeved outside the cutter bar 1; the holding groove 101 is mainly for the inside blade 2 storage position of cutter arbor 1, and the main objective that its setting provides certain space in the inside of cutter arbor 1 and accomodates blade 2, and blade 2 holding groove 101 degree of depth and blade 2 thickness identical, have guaranteed the stability in the cutting process. In addition, the accommodating groove 101 accommodates an elastic mechanism for controlling the rotation of the blade 2, so that the blade 2 of the cutter can complete the expansion or contraction action at the blind end of the workpiece under the action of the elastic mechanism;
a notch 301 corresponding to the accommodating groove 101 is arranged on the sleeve 3, and the cutting end of the blade 2 rotates out of the notch 301 to process a blind end stepped hole;
the sleeve 3 is also provided with a limiting piece for limiting the moving position of the sleeve 3; the cutter can process the blind end stepped hole on the other side from one side of the connecting hole, and the blind end stepped hole is processed under the backward action of the rotary tool at the processing position mainly by retracting and releasing the blade 2 from the blind end of the connected piece.
As shown in fig. 3 and 4, the clamping end of the cutter bar 1 is uniformly provided with a plurality of anti-slip grooves 102 for preventing the cutter from axially moving in the cutting process, and the end part of the clamping end is provided with a rotary driving groove 103; the clamping end of the cutter bar 1 mainly plays a role in fixation, and the anti-slip groove 102 is arranged, so that the rotation in the clamping process is facilitated, the axial supporting effect is played in the whole rotation process, and the anti-slip groove 102 is set to effectively prevent the whole cutter from axially moving in the cutting process; the rotary driving groove 103 is arranged at the end part of the clamping end and is fixedly arranged with the riveter core, the riveter core clamps the rotary driving groove 103 to rotate, and the cutter bar 1 is driven to rotate, so that the slipping and lost rotation of the cutter in the circumferential direction can be effectively restrained in the rotating process; therefore, the common cooperative cooperation of the two grooves ensures the stable operation of the cutter in the whole cutting process;
the depth of the accommodating groove 101 arranged at the working end of the cutter bar 1 is correspondingly equal to the thickness of the cutter blade 2.
A blade 2 fixing pin hole 104 penetrating through the cutter bar 1 is formed in the accommodating groove 101, a blade fixing pin 7 is arranged in the blade 2 fixing pin hole 104, and the blade 2 is hinged with the blade fixing pin 7; by arranging the blade fixing pin 7, the blade 2 can only perform circular motion around the blade fixing pin 7 in the contraction and release process, so as to play a role in limiting the running track of the blade, but the rotation is not always continuous until the vertical side end surface of the blade 2 is completely abutted against the end surface of the cutter bar 1, and the rotation is stopped;
as shown in fig. 6, the bottom end of the blade 2 is of an arc structure, and the top end of the blade 2 is obliquely arranged; the bottom end of the blade 2 is arranged into an arc-shaped structure, so that the rotation movement of the blade 2 in the contraction and release processes is facilitated; secondly, the phenomenon of stress concentration at the corner in the processing process of the blind end step hole can be prevented to a great extent, so that the service life of the cutter bar 1 is greatly prolonged; the vertical side end surface of the blade cooperates with the vertical surface of the side part of the accommodating groove 101 of the cutter bar, so that the final position of the blade 2 after being ejected can be positioned and limited, and smooth processing of the blind end step hole is ensured;
a setting groove 201 is formed in the bottom end of the blade 2, and a hook claw 202 is fixedly arranged in the setting groove 201; one end of the rubber band 5 is fixed with the hook claw 202, so that the blade 2 can rotate along the blade fixing pin 7.
The elastic mechanism comprises a spring 4, a spring 4 fixing pin hole 105 penetrating through the cutter bar 1 is arranged in the accommodating groove 101, a spring fixing pin 8 is arranged in the spring 4 fixing pin hole 105, the fixed end of the spring 4 is connected with the spring fixing pin 8, the movable end of the spring 4 is connected with a rubber ring 5, and the other end of the rubber ring 5 is connected with a hook claw 202 arranged at the bottom end of the cutter blade 2;
the main function of the spring 4 is to make the mechanical signal of the spring 4 and the position signal of the blade 2 mutually converted. However, the realization of the action of the spring 4 requires the cooperation of the rubber band 5 and the spring fixing pin 8, wherein the spring fixing pin 8 and the blade fixing pin 7 have similar working principles, and the limitation of the fixing pin hole 105 of the spring 4 on the cutter bar 1 is also that; the rubber ring 5 is used for realizing the connection between the bottom of the blade 2 and the movable side of the spring 4, and the working principle of the three is as follows: when the cutter is required to be retracted, the aid of the sleeve 3 is needed, the rectangular groove of the sleeve 3 moves to drive the blade 2 to gradually enter the blade accommodating groove 101, at the moment, the position of the blade 2 around the bottom of the blade fixing pin 7 changes, the blade 2 pulls the rubber ring 5, and simultaneously, the rubber ring 5 also starts to stretch the stretching spring 4, but due to the limitation of the spring fixing pin hole 105, the spring 4 with one fixed end can generate stretching elastic deformation when being acted by force, when the end face of the vertical side of one end of the blade 2 is propped against the bottom of the cutter bar 1, the other end face of the blade 2 is also limited by the extrusion of the end face of the sleeve 3, so that the blade cannot be released, and at the moment, the stretching force of the spring 4 is at the maximum; when the blade 2 needs to be released, the sleeve notch 301 moves to the left side of the blade 2 due to the movement of the sleeve 3, and at this time, the elastic force of the spring 4 is released due to insufficient extrusion force which can be given to the end face of the blade 2 by the sleeve 3, so that the spring 4 is promoted to pull the rubber ring 5 to drive the bottom of the blade 2 to perform reverse circular movement around the blade fixing pin 7, the blade 2 is released, and the working state of the whole cutter is restored.
As shown in fig. 5, the sleeve 3 is of a hollow cylindrical structure, a notch 301 provided on the sleeve 3 is a rectangular groove-shaped notch 301, a hole 302 is provided through one end of the sleeve 3 away from the notch 301, a cutter ejecting position locking hole 106 and a cutter contracting position locking hole 107 corresponding to the hole 302 are provided on the outer wall of the cutter bar 1, and a chute 108 for the movement of the limiting piece is provided between the cutter ejecting position locking hole 106 and the cutter contracting position locking hole 107;
the limiting piece is arranged in a hole 302 arranged on the sleeve 3;
at the cutter bar 1, due to the existence of the cutter ejecting position locking hole 106, the sliding groove 108 and the cutter retracting position locking hole 107, the sliding groove 108 can provide a fixed moving track for the clamp spring 6 when the sleeve 3 is pulled; when the clamp spring 6 is positioned in the ejection position locking hole, the whole cutter is in a working state, but in order to realize the processing of a blind end step hole, the cutter needs to be retracted before being inserted into the hole to be processed, the sleeve 3 can be pulled backwards at the moment, the clamp spring 6 is driven by the sleeve 3 to slide out of the cutter ejection position locking hole 106 and move backwards, due to the sliding groove 108 on the cutter bar 1, the sleeve 3 can only retreat along a fixed path under the cooperation limit of the clamp spring 6 and the sliding groove 108, after the sleeve 3 and the clamp spring 6 retreat for a certain distance, due to the fact that the rectangular groove on the sleeve 3 is contacted with the rear end face of the vertical section of the cutter blade 2, the thrust action of the cutter blade 2 on the inner wall of the rectangular notch of the sleeve 3 gradually enters the accommodating groove 101 in a mode of rotating around the cutter fixing pin 7, and the clamp spring 6 gradually slides towards the cutter shrinkage position locking hole 107 by the cutter ejection position locking hole 106 on the guide rail of the sliding groove 108, when the final clamp spring 6 reaches the cutter shrinkage position locking hole 107, two sides of the clamp spring 6 can only be inserted into the cutter shrinkage position locking hole 107, and at the moment, the clamp spring 6 cannot retreat due to the limit action of the right side of the cutter shrinkage position locking hole wall 107. Similarly, under this condition, if the sleeve 3 is pushed forward by applying a certain pushing force, the sleeve 3 and the clamp spring 6 will reach the tool ejection position locking hole 106, at this time, the clamp spring 6 is limited by the left side of the wall of the tool ejection position locking hole 106, and cannot continue to advance forward, and in this process, the tool will also be ejected from the rectangular slot of the sleeve 3 by rotating around the blade fixing pin 7 under the stretching action of the rubber ring 5 and the tension spring 4.
The diameters of the cutter ejecting position locking hole 106 and the cutter contracting position locking hole 107 are equal to the diameter of the hole 302;
the depth of the cutter ejecting position locking hole 106 and the cutter contracting position locking hole 107 are equal and larger than the depth of the slide groove 108.
As shown in fig. 7, the limiting member is a clamping spring 6, and two tail ends of the clamping spring 6 are correspondingly inserted into holes 302 penetrating through the sleeve 3.
As shown in fig. 8, the assembly process of the cutter is as follows: firstly, connecting a blade 2 and a spring 4 through a rubber ring 5, putting the connected blade 2 and spring 4 into a containing groove 101 in a cutter bar 1, fixing the blade 2 at a blade fixing pin 7, inserting a spring fixing pin 8 into a spring fixing pin hole 105 on the cutter bar 1, and hooking the other end of the spring 4 on the spring fixing pin 8 by using a tool, thereby completing the installation work of the cutter bar 1 and the blade 2;
then, the sleeve 3 is penetrated from the left side of the cutter bar 1, gradually pushed into the right side of the cutter bar 1 from left to right until the edge position of the notch 301 is completely abutted against the end face of the side of the blade 2, and the hole 302 is overlapped with the position of the cutter ejecting position locking hole 106; then, the snap spring 6 is buckled in the position of the hole 302 outside the sleeve 3, the position of the sleeve 3 is slightly adjusted, so that the two ends of the snap spring 6 are completely inserted into the cutter ejection position locking hole 106 on the cutter bar 1, and the whole cutter assembling work is completed at the moment; similarly, the cutter can be directly assembled to the contracted state of the blade 2, namely, the sleeve 3 is pushed to the cutter contracted position, and the clamp spring 6 is inserted into the cutter contracted position locking hole 107 of the cutter bar 1;
finally, the whole cutter is inserted into the riveter, the anti-skid groove 102 is fixed at the chuck, the rotary driving groove 103 is connected with the riveter core, and at the moment, the cutter can be used for processing blind end stepped holes.
The method comprises the following specific steps: the sleeve 3 is pulled backwards, the sleeve 3 drives the clamp spring 6 to slide out of the cutter ejection position locking hole 106 and move backwards, the sleeve 3 can only retreat along a fixed path under the cooperation limit of the clamp spring 6 and the slide groove 108 due to the existence of the slide groove 108 on the cutter bar 1, after the sleeve 3 and the clamp spring 6 retreat for a certain distance, the rectangular groove on the sleeve 3 can contact the rear end face of the vertical end of the blade 2, the blade 2 can be subjected to the axial thrust force of the inner wall of the rectangular notch of the sleeve 3, and gradually moves axially, but the whole blade 2 can only axially and circumferentially move around the center of the fixing pin of the blade 2 due to the limitation of the blade fixing pin 7; however, in the moving process, as the bottom of the blade 2 is tightly connected with the spring 4 by the rubber ring 5, the blade 2 can drive the two parts to move in the moving process, and the spring 4 can be stretched by the rubber ring 5 to gradually stretch and deform in the rotating process of the blade 2 due to the limitation of the spring fixing pin hole 105; with further pulling of the sleeve 3, the blade 2 completes a 1/4 circular movement around the blade fixing pin 7. At this time, the blade 2 has completely entered the accommodating groove 101, the circular bottom and the vertical side end face thereof have been abutted against the end faces of the cutter bar 1 and the sleeve 3, and the spring 4 is in the maximum tensile deformation state. Meanwhile, the sleeve 3 drives the clamp spring 6 to change positions along the sliding groove 108 from the tool ejection position locking hole 106 to the tool retraction position locking hole 107, so that not only is the sleeve 3 locked, but also the locking of the whole tool is controlled, thereby realizing the tool retraction action of the whole tool, and the appearance of the tool after the tool retraction is shown in the figure.
Then, the cutter with the processed blade 2 is placed at the position of the blind end stepped hole area of the part to be processed, and in order to process the blind end stepped hole, the blade 2 is released from the area to be processed, and at the moment, the sleeve 3 is only required to be returned to the original position; but when the sleeve 3 is restored to the original position, the supporting force given to the blade 2 by the side wall of the sleeve 3 is gradually reduced due to the change of the position of the rectangular groove, so that the tensile stress of the extension spring 4 to the circular arc bottom of the blade 2 is gradually released, the blade 2 moves reversely by 1/4 circle around the blade fixing pin 7 in the opposite direction, and the blade 2 is gradually released from the accommodating groove 101 until the extension spring 4 is restored to the original position; at this time, the side end face and the circular arc bottom face of the blade 2 are completely abutted against the inner wall of the accommodating groove 101, and the position of the clamp spring 6 is also fixed again to the tool ejection position locking hole 106 by the tool retraction position locking hole 107, and the tool is ready before the processing of the component is completed at this time.
Finally, the blind end of the component can be processed by using the combined cutter, the cutter clamping end with the anti-slip groove 102 (preventing axial movement in the rotating process) and the rotary driving groove 103 (preventing slipping and losing rotation in the rotating process) is placed in the gun head of the riveter, the riveter trigger is pulled, the whole riveter is in an excited state, and the gun head and the gun core in the riveter drive the cutter bar 1 to move forward and rotate. In the process of advancing and rotating the cutter, the cutter blade 2 is driven by the rotating force and the forward driving force to carry out turning on the blind end step of the part, but the process is not continuous, and because the riveter drives the gun head to rotate, the gun head and the gun core in the riveter can stop rotating and advancing after reaching the set time under a certain time limit condition; at this time, an operator can loosen the trigger of the riveting gun, the trigger automatically resets, and the cutter returns to the initial position again, so that the whole turning operation of the component is completed, the typical application working conditions and the shapes before and after the step hole machining are shown in fig. 9 to 12, the reverse step hole milling can be quickly performed on various components, and the blind end step hole machining of the component is realized.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. A combined cutter for processing a blind end step hole is characterized in that: the cutter bar (1) is provided with a containing groove (101) at the working end of the cutter bar (1), a cutter blade (2) for processing a blind end step hole is hinged in the containing groove (101), an elastic mechanism for controlling the cutter blade (2) to rotate is arranged in the containing groove (101), and a sleeve (3) is sleeved outside the cutter bar (1);
a notch (301) corresponding to the accommodating groove (101) is arranged on the sleeve (3), and the cutting end of the blade (2) rotates to the outside of the notch (301) to process the blind end stepped hole;
the sleeve (3) is also provided with a limiting piece for limiting the moving position of the sleeve (3);
one end of the sleeve (3) far away from the notch (301) is provided with a hole (302) in a penetrating way, the outer wall of the cutter bar (1) is provided with a cutter ejection position locking hole (106) and a cutter contraction position locking hole (107) corresponding to the hole (302), and a chute (108) for the limiting piece to move is arranged between the cutter ejection position locking hole (106) and the cutter contraction position locking hole (107);
the limiting piece is a clamping spring (6), and tail ends of two sides of the clamping spring (6) are correspondingly inserted into holes (302) penetrating through the sleeve (3);
a blade fixing pin hole (104) penetrating through the cutter bar (1) is formed in the accommodating groove (101), a blade fixing pin (7) is arranged in the blade fixing pin hole (104), and the blade (2) is hinged with the blade fixing pin (7);
the bottom end of the blade (2) is of an arc-shaped structure, and the top end of the blade (2) is obliquely arranged;
a setting groove (201) is arranged at the bottom end of the blade (2), and a claw (202) is fixedly arranged in the setting groove (201);
the elastic mechanism comprises a spring (4), a spring fixing pin hole (105) penetrating through the cutter bar (1) is arranged in the accommodating groove (101), a spring fixing pin (8) is arranged in the spring fixing pin hole (105), the fixed end of the spring (4) is connected with the spring fixing pin (8), the movable end of the spring (4) is connected with a rubber ring (5), and the other end of the rubber ring (5) is connected with a hook claw (202) arranged at the bottom end of the cutter blade (2).
2. The combined cutter for processing the blind end stepped hole according to claim 1, wherein: the clamping end of the cutter bar (1) is uniformly provided with a plurality of anti-slip grooves (102) for preventing the cutter from axially moving in the cutting process, and the end part of the clamping end is provided with a rotary driving groove (103);
the depth of the accommodating groove (101) arranged at the working end of the cutter bar (1) is correspondingly equal to the thickness of the cutter blade (2).
3. The combined cutter for processing the blind end stepped hole according to claim 1, wherein: the sleeve (3) is of a hollow cylindrical structure, and a notch (301) arranged on the sleeve (3) is a rectangular groove-shaped notch (301);
the limiting piece is arranged in a hole (302) arranged on the sleeve (3).
4. A combination tool for blind end stepped hole machining according to claim 3, wherein: the diameters of the cutter ejecting position locking hole (106) and the cutter shrinking position locking hole (107) are equal to the diameter of the hole (302);
the depth of the cutter ejecting position locking hole (106) is equal to that of the cutter retracting position locking hole (107), and the depth of the cutter ejecting position locking hole is larger than that of the chute (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060234.XA CN114289764B (en) | 2022-01-19 | 2022-01-19 | Combined cutter for processing blind end stepped hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060234.XA CN114289764B (en) | 2022-01-19 | 2022-01-19 | Combined cutter for processing blind end stepped hole |
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| Publication Number | Publication Date |
|---|---|
| CN114289764A CN114289764A (en) | 2022-04-08 |
| CN114289764B true CN114289764B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210060234.XA Active CN114289764B (en) | 2022-01-19 | 2022-01-19 | Combined cutter for processing blind end stepped hole |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1228161C (en) * | 2003-07-16 | 2005-11-23 | 兰州理工大学 | Reversed countersinking-cutter for digital control processing |
| JP4685178B2 (en) * | 2009-06-18 | 2011-05-18 | 株式会社日研工作所 | Back facing cutting tool |
| JP5378330B2 (en) * | 2010-09-03 | 2013-12-25 | 株式会社日研工作所 | Back facing cutting tool |
| CN204912868U (en) * | 2015-09-07 | 2015-12-30 | 泰富重工制造有限公司 | Foldable anti - countersink utensil |
| CN106041220B (en) * | 2016-06-23 | 2018-07-06 | 绵阳市绵工工具有限公司 | Counter for reverse side step hole machined scrapes cutter |
| CN109759610B (en) * | 2019-04-01 | 2024-03-19 | 松德刀具（长兴）科技有限公司 | Telescopic reverse scraper |
| CN213916156U (en) * | 2020-11-13 | 2021-08-10 | 绵阳市绵工工具有限公司 | Hydraulic automatic opening reverse scraper tool for machining reverse side step hole |
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