A small-diameter deep-hole root chamfer regrinding tool

Abstract

The application discloses a small-diameter deep-hole root chamfer grinding tool and belongs to the field of bench work processing. The small-diameter deep-hole root chamfer grinding tool comprises a tool body, the outer diameter of the tool body is smaller than the inner diameter of a deep hole, a nylon bushing is sleeved on the outside of the tool body, a reamer head is fixedly installed on the inside of the tool body and extends out of the inside of the tool body at both ends, one end of a screw rod is threadedly connected to one end of the tool body, a righting mechanism is arranged on the outside of the screw rod, the inner wall of a nut is threadedly connected to the outer surface of the screw rod, one end of the nut is tightly attached to one end of the tool body, one end of the screw rod away from the tool body penetrates through the outside of a handle and is threadedly connected to the outside of the handle, and holding mechanisms are arranged at both ends of the handle. The tool can reduce the tool joint boss generated during the taper chamfering, thereby improving the quality qualification rate of the chamfer grinding tool during the machining of the small-diameter deep-hole root.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bench work, more particularly to a small-diameter deep hole root chamfer grinding tool. BACKGROUND

[0002] When machining a workpiece, it is often necessary to drill a deep hole and a stepped hole, and the inner side of the stepped hole has a beveled taper transition. The conventional machining method is as follows: a deep hole boring head with a rear guide and a beveled cutter head is installed from the right end into a deep hole machining device to complete the machining.

[0003] According to the patent search, a hole inner wall side chamfer punching device is disclosed in Chinese Patent No. CN106583520B, which comprises a fixed plate, an insert plate, a lower punch, a support column, a first pin, an upper fixed plate, an upper punch, a second pin, a bolt, a third pin and a guide column. The support column is a columnar structure with a non-symmetrical ellipse cross section, and the two half-arc contact ends of the non-symmetrical ellipse have an R5 chamfer structure. The half-arc of one side of the non-symmetrical ellipse can be in contact with the positioning and fitting of the inner diameter of the punched part. The form of the R5 chamfer structure at the two half-arc contact ends of the non-symmetrical ellipse ensures that the part can be smoothly inserted and removed. The support column includes an axial stepped through hole and a first radial through hole, which are in communication. One end of the lower punch is a conical tip structure that matches the side wall chamfer of the punched part, which is used to punch the side wall chamfer. The middle part of the lower punch is provided with a second radial through hole. One end of the lower punch conical tip structure is inserted into the inner side of one end of the first radial through hole. The first pin is located inside the axial stepped through hole near one end of the first radial through hole. The first pin is connected with the second radial through hole of the lower punch, and is used for positioning and fixing the lower punch. The lower punch is positioned and disassembled with the support column through the first pin inserted into the second radial through hole of the lower punch. The bolt is located inside the other end of the axial stepped through hole. The support column is connected with the insert plate through the second pin and the bolt. The lower end of the insert plate is connected with the lower fixed plate. The upper fixed plate and the lower fixed plate are installed on a punch. Although the hole inner wall side chamfer punching device is installed on the punch, the punched part is inserted into the support column, the end face of the part with three holes on one end is in contact with the step of the support column, the three holes are uniformly positioned with the center of the punch, the upper punch operates the punching action, the three-hole inner chamfer punching is completed, and the problem of inner chamfer deflection caused by the old bench drilling machining is solved. It is especially important for ensuring the machining quality of the inner chamfer of the part and meeting the requirements of the clamping pin riveting force, and improving the quality stability of the product.

[0004] But the existing hole wall side chamfer punching device in the process of machining small diameter deep hole, the punched part is sleeved into the support, the end face of the part with three holes is contacted with the step of the support to ensure the uniformity of the three holes and the center position of the punch, the upper punch runs and punches, and the three-hole chamfer punching is completed. The hole diameter of the small diameter deep hole is too small, a small diameter upper punch needs to be selected, the upper punch will shake when cutting the inclined surface, the deep hole root cone surface is easy to have a boss defect, and the quality risk is increased due to the boss defect when the existing hole wall side chamfer punching device is used to machine the small diameter deep hole root. Therefore, a small diameter deep hole root chamfer grinding tool is provided. SUMMARY

[0005] 1. Technical problem to be solved

[0006] In view of the problems in the prior art, the purpose of the present application is to provide a small diameter deep hole root chamfer grinding tool which can reduce the tool engagement boss generated when chamfering the cone surface, thereby improving the quality qualification rate of the chamfer grinding tool when machining the small diameter deep hole root.

[0007] 2. Technical scheme

[0008] To solve the above problems, the present application adopts the following technical scheme.

[0009] A small diameter deep hole root chamfer grinding tool, comprising:

[0010] A tool body, the outer diameter of the tool body is smaller than the inner diameter of the deep hole;

[0011] A nylon bushing, the nylon bushing is sleeved on the outside of the tool body;

[0012] A reamer head, the reamer head is fixedly installed in the inside of the tool body, and both ends extend out of the inside of the tool body;

[0013] A screw rod, one end of the screw rod is threadedly connected to one end of the tool body, and a righting mechanism is arranged on the outside of the screw rod;

[0014] A nut, the inner wall of the nut is threadedly connected to the outer wall of the screw rod, and one end of the nut is tightly attached to one end of the tool body;

[0015] A handle, the end of the screw rod away from the tool body penetrates and is threadedly connected to the outside of the handle, and the two ends of the handle are both provided with a holding mechanism.

[0016] Further, a hexagonal recess is formed in the end of the tool body away from the screw rod, and a first screw hole is formed in the tool body and adapted to the one end of the screw rod.

[0017] Further, the righting mechanism comprises:

[0018] The inner wall of the inner threaded cylinder is threadedly connected to the outer side of the screw rod;

[0019] The sliding cylinder is sleeved on the outer side of the inner threaded cylinder;

[0020] The upper surface of the foot is provided with a horizontal detection mechanism.

[0021] Further, the inner wall of the sliding cylinder is provided with a plurality of oil injection grooves, the inner side of the oil injection groove is inserted with an oil absorption sponge, the both sides of the inner side of the oil injection groove are provided with an annular groove, the inner side of the annular groove is inserted with a C-shaped ring, and one end of the C-shaped ring extends out of the inner side of the annular groove and is bonded to one side of the oil absorption sponge.

[0022] Further, the foot is provided with a second screw hole away from the screw rod, and a jacking bolt is screwed into the second screw hole.

[0023] Further, the jacking bolt is rotatably installed with a clamp at one end close to the screw rod, the clamp is bonded with an elastic pad at one side close to the screw rod, and a plurality of round holes are formed on the outer side of the elastic pad.

[0024] Further, the horizontal detection mechanism comprises:

[0025] The recess is formed on the upper surface of the foot;

[0026] The lower surface of the level is fixedly installed and connected to the lower wall of the recess.

[0027] Further, the foot is provided with a third screw hole at the lower end, a lifting bolt is screwed into the third screw hole, and a foot pad is bonded to one end of the lifting bolt extending out of the third screw hole.

[0028] Further, the gripping mechanism comprises:

[0029] The handle is sleeved at one end of the handle;

[0030] A plurality of heat dissipation holes are formed in the inner side of the handle;

[0031] The outer side of the reinforcing pipe is bonded to the inner wall of the heat dissipation hole.

[0032] Further, the outer wall of the tool body is provided with a plurality of embedding grooves, the inner side of the embedding groove is provided with a rubber ring, the outer side of the rubber ring extends out of the inner side of the embedding groove and is bonded to the inner wall of the nylon bushing.

[0033] 3. Beneficial effects

[0034] Compared with the prior art, the present application has the advantages of:

[0035] (1) During the operation of the present application, the machining of the small-diameter deep hole of the workpiece is transferred to the bench work process, the nylon bushing is matched and positioned with the small-diameter inner hole of the workpiece, the bevel shaft center is guaranteed to be coaxial with the inner hole, then the handle is held by hand to rotate, the reamer head inside the tool body is driven to rotate and stick to the root conical surface of the deep hole to cut the chamfer, the customized reamer head can simultaneously machine the entire conical surface and the straight hole root connected thereto, one-time forming can be met, the tool protrusion generated during chamfering of the conical surface can be reduced, manual grinding is limited in feed amount, the L value can be guaranteed to be within the tolerance range and is not easy to exceed the tolerance, and the quality qualification rate of the chamfer grinding tool during machining of the small-diameter deep hole root is improved.

[0036] (2) During the operation of the present application, the outer side of the screw rod is supported by the nylon bushing, the screw rod is vertically inserted into the small-diameter deep hole, the slide cylinder is loosened by hand, the slide cylinder slides downward along the inner thread cylinder outside the screw rod, the lower end of the supporting leg falls on the ground, at the same time, the wrench is used to positively rotate the jacking bolt, the plurality of jacking bolts travel along the first screw hole and jack up the outer side of the workpiece, so that the supporting leg is circumferentially supported on the slide cylinder, when the screw rod rotates or lifts, multi-point support can be obtained, the swing amplitude of the screw rod is reduced, the tool body and the reamer head inside the tool body are righted, and the precision of the chamfering of the small-diameter deep hole root is improved.

[0037] (3) When the deep hole of the workpiece is machined on the uneven working surface, the lower end of the supporting leg falls on the uneven working surface, the horizontal state of the supporting leg is indicated by the horizontal detection mechanism, and the wrench is used to positively rotate the lifting bolt in the second screw hole, the lifting bolt extends along the threads of the second screw hole, the foot pad at one end is used to jack up the supporting leg by supporting on the ground, the horizontal state of the supporting leg is adjusted, conversely, if the horizontal state of the supporting leg is not improved, the wrench is used to reversely rotate the lifting bolt, the above operation is repeated until the supporting leg 11 reaches the horizontal state, so that the righting mechanism right the screw rod 4 on the uneven working surface. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a schematic structural view of the front view of the present application;

[0039] Figure 2 It is a schematic structural view of the bottom view of the present application;

[0040] Figure 3 It is a schematic structural view of the sectional view of the present application;

[0041] Figure 4 It is a schematic structural view of the Figure 1 enlarged structure of A in the present application;

[0042] Figure 5 It is a schematic structural view of the Figure 1 enlarged structure of B in the present application;

[0043] Figure 6 Fig. 1 is a schematic view of the enlarged structure at A in the present application; Figure 3 Fig. 2 is a schematic view of the enlarged structure at B in the present application;

[0044] Figure 7 Fig. 3 is a schematic view of the enlarged structure at C in the present application; Figure 3 Fig. 4 is a schematic view of the enlarged structure at D in the present application.

[0045] Explanation of reference numerals in the figures:

[0046] 1, tool body; 2, nylon bushing; 3, reamer head; 4, screw rod; 5, nut; 6, handle; 7, hexagonal recess; 8, first screw hole; 9, internally threaded cylinder; 10, sliding cylinder; 11, foot; 12, oiling groove; 13, oil-absorbing sponge; 14, annular groove; 15, C-shaped collar; 16, second screw hole; 17, jacking bolt; 18, clamp; 19, elastic pad; 20, circular hole; 21, groove; 22, level; 23, third screw hole; 24, lifting bolt; 25, foot pad; 26, grip; 27, heat dissipation hole; 28, reinforcing pipe; 29, embedding groove; 30, rubber ring. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0048] Embodiment:

[0049] Please refer to Figure 1-7 A small-diameter deep-hole root chamfer grinding tool, comprising:

[0050] A tool body 1, the outer diameter of the tool body 1 is smaller than the inner diameter of the deep hole;

[0051] A nylon bushing 2, the nylon bushing 2 is sleeved on the outside of the tool body 1;

[0052] A reamer head 3, the reamer head 3 is fixedly installed inside the tool body 1, and both ends extend out of the inside of the tool body 1;

[0053] A screw rod 4, one end of the screw rod 4 is threadedly connected to one end of the tool body 1, and a righting mechanism is arranged on the outside of the screw rod 4;

[0054] A nut 5, the inner wall of the nut 5 is threadedly connected to the outer wall of the screw rod 4, and one end is tightly attached to one end of the tool body 1;

[0055] The handle 6 is threaded on the outside of the handle 6 at one end of the screw rod 4 away from the tool body 1, and the two ends of the handle 6 are provided with holding mechanisms.

[0056] In operation, the small-diameter deep hole machining of the workpiece is transferred to the bench work process, the nylon bushing 2 is positioned in cooperation with the small-diameter inner hole of the workpiece, the bevel shaft center is coaxial with the inner hole, one end of the screw rod 4 is threaded and assembled to one end of the tool body 1, the other end extends out of the workpiece and is threaded and installed with the handle 6, and the tool body 1 and the screw rod 4 are tightened by the nut 5, to lock the connection between the tool body 1 and the screw rod 4, then the handle 6 is held and rotated to drive the tool body 1 and the reamer head 3 inside the tool body 1 to rotate and stick to the deep hole root cone surface to cut the chamfer, the reamer head 3 can simultaneously machine the entire cone surface and the straight hole root connected thereto, and can satisfy one-time forming without the need for secondary tool setting, can reduce the tool joint boss generated when chamfering the cone surface, and manual grinding has limited feed amount, which can ensure that the L value is within the tolerance range and is not easy to exceed the tolerance, to improve the quality pass rate of the chamfer grinding tool when machining the small-diameter deep hole root, if the bevel roughness is to be improved, the reamer head 3 can be replaced with a sand strip (a sand strip with a alloy surface), to grind the cone surface to meet the roughness requirement, and if the bevel grinding time is relatively long, the nylon bushing 2 can be replaced with a beryllium copper material, which is hot-mounted with the tool body 1 in interference fit to resist high-temperature environments.

[0057] Referring to Figure 3 and Figure 6 , the tool body 1 is provided with a hexagonal recess 7 at one end away from the screw rod 4, and the tool body 1 is provided with a first screw hole 8 adapted to the one end of the screw rod 4, when assembling the tool body 1 and the screw rod 4, a hexagonal wrench is inserted into the hexagonal recess 7 to lock the tool body 1 at the current position, then the screw rod 4 is screwed into the first screw hole 8 by the wrench to avoid the screw rod 4 from feeding relative to the tool body 1, to complete the assembly, then the nut 5 is screwed to the outside of the screw rod 4 until the tool body 1 is clamped, to tighten the tool body 1 and the screw rod 4, under the friction, the tool body 1 and the screw rod 4 are locked, and the hexagonal wrench is removed, conversely, by reversing the nut 5 and the screw rod 4, the chamfer grinding tool can be disassembled.

[0058] Referring to Figure 1 , Figure 2 and Figure 4 , the holding mechanism comprises:

[0059] The handle 26 is sleeved at one end of the handle 6, and is made of silica gel, which can relieve the swelling pain of the hands;

[0060] The heat dissipation holes 27 are arranged in the interior of the handle 26;

[0061] The outer side of the reinforcing pipe 28 is bonded to the inner wall of the heat dissipation hole 27, and the reinforcing pipe 28 is made of alloy steel, which can improve the deformation resistance of the handle 6.

[0062] In operation, the user holds the handle 6 by the grip 26 at one end, and pushes the handle 6, which can relieve the swelling pain of the hand, and the air flows along the heat dissipation hole 27 and the reinforcing pipe 28, taking away the heat of the handle 6 and the grip 26, which can reduce the temperature of the hand and keep the hand comfortable.

[0063] Referring to Figure 3 and Figure 6 The outer wall of the tool body 1 is provided with a plurality of embedded grooves 29, and the embedded grooves 29 are provided with rubber rings 30 inside, and the outer side of the rubber ring 30 extends out of the embedded groove 29 and is bonded to the inner wall of the nylon bushing 2. When the tool body 1 travels along the deep hole, the nylon bushing 2 is axially drawn due to friction with the inner wall of the deep hole, and the nylon bushing 2 is partially immersed in the embedded groove 29 through the rubber ring 30, which can enhance the axial connection between the nylon bushing 2 and the tool body 1, so as to relieve the pulling effect and reduce the nylon bushing 2 falling off the tool body 1.

[0064] Referring to Figure 3 and Figure 7 The righting mechanism comprises:

[0065] The inner wall of the inner threaded cylinder 9 is threadedly connected to the outer side of the screw rod 4;

[0066] The sliding cylinder 10 is sleeved on the outer side of the inner threaded cylinder 9;

[0067] The plurality of supporting legs 11 are circumferentially arranged on the outer side of the sliding cylinder 10, and the upper surface of the supporting leg 11 is provided with a horizontal detection mechanism, and the side of the supporting leg 11 away from the screw rod 4 is provided with a second screw hole 16, and the second screw hole 16 is provided with a jacking bolt 17 penetratingly installed inside.

[0068] In operation, the outer side of the screw rod 4 is supported by the nylon bushing 2, the screw rod 4 is vertically inserted into the small-diameter deep hole, and then the sliding cylinder 10 is loosened by hand, the sliding cylinder 10 slides down along the inner threaded cylinder 9 on the outer side of the screw rod 4, and the lower end of the supporting leg 11 falls to the ground, and at the same time, the jacking bolt 17 is turned clockwise by a wrench, the plurality of jacking bolts 17 travel along the second screw hole 16 and tightly press against the outer side of the workpiece, so that the supporting leg 11 circumferentially supports the sliding cylinder 10, and when the screw rod 4 rotates or lifts, it can be supported by multiple points, reduce the swing amplitude of the screw rod 4, and right the tool body 1 and the reamer head 3 inside, which is beneficial to improve the accuracy of the chamfering of the small-diameter deep hole root cone.

[0069] Referring to Figure 3 and Figure 7The inner wall of the sliding cylinder 10 is provided with a plurality of oil injection grooves 12, the oil injection grooves 12 are internally inserted with oil absorption sponges 13, the two sides of the oil injection grooves 12 are internally provided with annular grooves 14, the annular grooves 14 are internally inserted with C-shaped collars 15, one end of the C-shaped collars 15 extends out of the annular grooves 14 and is bonded to one side of the oil absorption sponges 13, a predetermined amount of lubricating oil is injected into the oil absorption sponges 13 in the oil injection grooves 12, when the inner threaded cylinder 9 can contact the oil absorption sponges 13 to coat lubricating oil when the sliding cylinder 10 slides outside the inner threaded cylinder 9, which is beneficial to alleviate the friction between the inner threaded cylinder 9 and the sliding cylinder 10, and the C-shaped collars 15 in the annular grooves 14 are used to tighten the oil absorption sponges 13, preventing the oil absorption sponges 13 from being separated from the oil injection grooves 12 due to friction with the inner threaded cylinder 9.

[0070] Referring to Figure 1 and Figure 5 , the clamp 18 is rotatably installed at one end of the screw rod 4 close to the screw rod 4, the elastic pad 19 is bonded to one side of the clamp 18 close to the screw rod 4, the material of the elastic pad 19 is rubber, which deforms to fit the outside of the workpiece when being pressed, a plurality of round holes 20 are formed on the outside of the elastic pad 19, when the screw rod 4 is used to press the workpiece at one end, the clamp 18 and the elastic pad 19 are used to stick to the outside of the workpiece, which is convenient to disperse the pressing effect of the screw rod 4 on the workpiece, and the elastic pad 19 deforms along the position of the round hole 20, which can quickly fit the outside of the workpiece.

[0071] Referring to Figure 1 and Figure 3 , the horizontal detection mechanism comprises:

[0072] the groove 21 is formed on the upper surface of the supporting leg 11;

[0073] the lower surface of the level 22 is fixedly installed and connected to the lower wall of the groove 21.

[0074] When the supporting leg 11 drives the level 22 in the groove 21 to move, the horizontal state of the supporting leg 11 is indicated by observing the position of the bubble in the level 22, when the bubble is in the middle, the supporting leg 11 is in a horizontal state, and when the bubble deviates from the middle position, the supporting leg 11 is in a tilted state, which is convenient to detect the horizontal state of the righting mechanism.

[0075] Referring to Figure 2 and Figure 3The lower end of the supporting leg 11 is provided with a third screw hole 23, a lifting bolt 24 is internally screwed in the third screw hole 23, one end of the lifting bolt 24 extends out of the third screw hole 23 and is bonded with a foot pad 25, when the workpiece deep hole is machined on the uneven working surface, the lower end of the supporting leg 11 falls on the uneven working surface, the horizontal state of the supporting leg 11 is indicated through the horizontal detection mechanism, the lifting bolt 24 in the third screw hole 23 is turned forward by using a wrench, the lifting bolt 24 extends along the thread of the third screw hole 23, the foot pad 25 at one end is pressed against the ground, so as to lift the supporting leg 11, the horizontal state of the supporting leg 11 is adjusted, conversely, if the horizontal state of the supporting leg 11 is not improved, the lifting bolt 24 is turned reversely by using a wrench, the above operation is repeated until the supporting leg 11 reaches the horizontal state, so that the righting mechanism rightens the screw rod 4 on the uneven working surface.

[0076] Working principle: when the present application works, the workpiece small-diameter deep hole machining is transferred to the bench work process, the nylon bushing 2 is positioned by cooperating with the workpiece small-diameter inner hole, the bevel shaft center is coaxial with the inner hole, one end of the screw rod 4 is assembled to one end of the tool body 1 along the thread, the other end extends out of the workpiece and is screwed with the handle 6, and the tool body 1 and the screw rod 4 are tightened by the nut 5, so as to lock the connecting place of the tool body 1 and the screw rod 4, then the handle 6 is held to rotate, the tool body 1 and the reamer head 3 inside the tool body 1 are rotated to stick to the deep hole root cone surface, so as to cut the chamfer, the reamer head 3 can simultaneously machine the entire cone surface and the straight hole root part connected therewith, one-time forming can be met, the tool boss generated during chamfering of the cone surface can be reduced, manual grinding is limited in feed amount, the L value can be ensured within the tolerance range, overproofing is not easy, and the quality qualification rate of the chamfer grinding tool during machining of the small-diameter deep hole root part is improved.

[0077] When the present application works, the outer side of the screw rod 4 is supported by the nylon bushing 2, the screw rod 4 is vertically inserted into the small-diameter deep hole, the slide cylinder 10 is loosened by hand, the slide cylinder 10 slides downward along the inner thread cylinder 9 outside the screw rod 4, the lower end of the supporting leg 11 falls on the ground, meanwhile, the jacking bolt 17 is turned forward by using a wrench, the plurality of jacking bolts 17 travel along the second screw hole 16 and tightly abut against the outer side of the workpiece, so that the supporting leg 11 circumferentially supports the slide cylinder 10, when the screw rod 4 rotates or lifts, multi-point support can be obtained, the swing amplitude of the screw rod 4 is reduced, the tool body 1 and the reamer head 3 inside the tool body 1 are righted, and the precision of the small-diameter deep hole root part cone chamfering is improved.

[0078] The present application can be used in machining workpiece deep hole on uneven work surface. The lower end of the supporting leg 11 falls on the uneven work surface. The horizontal detecting mechanism indicates the horizontal state of the supporting leg 11. The lifting bolt 24 in the third screw hole 23 is turned forward by using a wrench. The lifting bolt 24 extends along the thread of the third screw hole 23. The foot pad 25 at one end pushes against the ground to lift the supporting leg 11. The horizontal state of the supporting leg 11 is adjusted. If the horizontal state of the supporting leg 11 is not improved, the lifting bolt 24 is turned backward by using a wrench. The above operation is repeated until the supporting leg 11 reaches the horizontal state. The righting mechanism rightens the screw rod 4 on the uneven work surface.

[0079] The above description is only the preferred embodiment of the present application. The protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical solution and the improvement concept of the present application within the technical range disclosed by the present application.

Claims

1. A small diameter deep hole root chamfer reconditioning tool characterized by, The utility model provides a deep hole reamer, which comprises the following components: a tool body (1), the outer diameter of the tool body (1) is less than the inner diameter of the deep hole; a nylon bushing (2), the nylon bushing (2) is sleeved on the outside of the tool body (1); a reamer head (3), the reamer head (3) is fixedly installed on the inside of the tool body (1) and extends out of the inside of the tool body (1) at both ends; a screw rod (4), one end of the screw rod (4) is threadedly connected to one end of the tool body (1), and the outside of the screw rod (4) is provided with a righting mechanism; a nut (5), the inner wall of the nut (5) is threadedly connected to the outside of the screw rod (4), and one end of the nut (5) is tightly attached to one end of the tool body (1); a handle (6), the end of the screw rod (4) away from the tool body (1) penetrates the outside of the handle (6) which is threadedly connected, and both ends of the handle (6) are provided with a holding mechanism; the righting mechanism comprises: an internally threaded cylinder (9), the inner wall of the internally threaded cylinder (9) is threadedly connected to the outside of the screw rod (4); a sliding cylinder (10), the sliding cylinder (10) is sleeved on the outside of the internally threaded cylinder (9); a plurality of supporting legs (11), the supporting legs (11) are circumferentially arrayed on the outside of the sliding cylinder (10), and the upper surfaces of the supporting legs (11) are provided with a level detection mechanism; a plurality of oil injection grooves (12) are formed in the inner wall of the sliding cylinder (10), oil absorption sponges (13) are inserted into the oil injection grooves (12), annular grooves (14) are formed in both sides of the oil injection grooves (12), C-shaped collars (15) are inserted into the annular grooves (14), and one end of the C-shaped collars (15) extends out of the annular grooves (14) and is bonded to one side of the oil absorption sponges (13); a second screw hole (16) is formed in the side of the supporting leg (11) away from the screw rod (4), and a jacking bolt (17) is threadedly installed in the second screw hole (16); a clamp (18) is rotatably installed on the end of the jacking bolt (17) close to the screw rod (4), an elastic pad (19) is bonded to the side of the clamp (18) close to the screw rod (4), and a plurality of round holes (20) are formed in the outside of the elastic pad (19); the level detection mechanism comprises: a groove (21) formed in the upper surface of the supporting leg (11); a level ruler (22) fixedly installed on the lower wall of the groove (21); a third screw hole (23) formed in the lower end of the supporting leg (11), a lifting bolt (24) threadedly installed in the third screw hole (23), and a foot pad (25) bonded to one end of the lifting bolt (24) extending out of the third screw hole (23).

2. The small diameter deep hole root chamfer refacing tool of claim 1 wherein: a hexagonal recess (7) formed in the end of the tool body (1) away from the screw rod (4), and a first screw hole (8) formed in the tool body (1) and matched with one end of the screw rod (4).

3. The small diameter deep hole root chamfer refacing tool of claim 1 wherein: a plurality of embedding grooves (29) formed in the outer wall of the tool body (1), a rubber ring (30) arranged in the embedding grooves (29), the rubber ring (30) extending out of the embedding grooves (29) and bonded to the inner wall of the nylon bushing (2).

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