A quick-change reamer with adjustable size

Abstract

The application belongs to the field of mechanical processing, and particularly relates to a quick-change reamer capable of fine adjustment of size, which comprises a reamer body, a fastening screw and a blade arranged at one end of the reamer body, the reamer body comprises a reamer rod, a reamer shaft and a shaft sleeve arranged coaxially, the reamer shaft is fixedly connected to one end of the reamer rod close to the blade, and the shaft sleeve is detachably connected to the reamer shaft; a circular truncated cone-shaped fastening hole is arranged on the blade, a threaded hole corresponding to the fastening hole is arranged on the reamer rod, the fastening screw comprises a threaded section and a circular truncated cone-shaped fastening section, the diameter of the threaded section is smaller than the minimum diameter of the fastening section, the oblique angle of the fastening hole is equal to the oblique angle of the fastening section, the fastening screw is connected through the fastening hole and the threaded hole, the threaded section is matched with the threaded hole, one side of the fastening section is in abutment with the fastening hole, and the blade is in abutment with the shaft sleeve. The application has the effects of fine adjustment of the size of the reamer to prolong the service life of the reamer and reduction of production cost.

Description

TECHNICAL FIELD

[0001] The application relates to the field of machining, in particular to a quick-change reamer capable of size fine adjustment. BACKGROUND

[0002] The reamer is a rotary tool with one or more teeth, which is used to cut off a thin layer of metal on the surface of a machined hole to achieve the effect of hole expansion or hole repair.

[0003] Since the reamer is a precision machining tool, the wear of the blade edge during the machining process will lead to a decrease in the product qualification rate and the good product rate. The relevant process mainly increases the hardness and toughness of the blade edge to increase the durability, such as using diamond or polycrystalline diamond (PCD) to make the blade edge, and increasing the number of blade edges to reduce the wear of a single blade edge, thereby increasing the service life of the reamer.

[0004] However, in the high-strength machining process, the blade edge will always be worn, and once it is worn, the accessory can only be replaced, which undoubtedly increases the cost of production and machining. SUMMARY

[0005] In order to solve the above problems and make the tool with slight wear still capable of machining qualified workpieces, the application provides a quick-change reamer capable of size fine adjustment.

[0006] The quick-change reamer capable of size fine adjustment provided by the application adopts the following technical scheme:

[0007] The quick-change reamer capable of size fine adjustment comprises a tool body, a fastening screw and a blade provided at one end of the tool body, the tool body comprises a tool rod, a tool shaft and a shaft sleeve coaxially arranged, the tool shaft is fixedly connected to one end of the tool rod close to the blade, and the shaft sleeve is detachably connected to the tool shaft; a circular truncated cone-shaped fastening hole is formed in the blade, a threaded hole corresponding to the fastening hole is formed in the tool rod, the fastening screw comprises a threaded section and a circular truncated cone-shaped fastening section, the diameter of the threaded section is smaller than the minimum diameter of the fastening section, the oblique angle of the fastening hole is equal to the oblique angle of the fastening section, the fastening screw is connected to the threaded hole through the fastening hole, the threaded section is matched with the threaded hole, one side of the fastening section abuts against the fastening hole, and the blade abuts against the shaft sleeve.

[0008] By adopting the technical scheme, the blade is pressed by the fastening screw to the direction close to the axis of the cutter body until abutting against the shaft sleeve, and with the replacement of the shaft sleeve, the distance between the blade and the axis of the cutter body changes accordingly, in other words, the cutting radius of the blade changes, therefore, when the reamer is worn in the process of hole repairing and hole expanding and the wear is enough to affect the machining precision, the wear of the cutter can be compensated by replacing the shaft sleeve with different sizes instead of replacing the whole reamer, which greatly prolongs the service life of the reamer and reduces the production cost.

[0009] Optionally, the size-adjustable quick-change reamer further comprises a positioning pin, the positioning pin is arranged on the end face of the cutter bar close to the blade, and the positioning pin is arranged in one-to-one correspondence with the blade and abuts against each other.

[0010] By adopting the technical scheme, in the axial direction of the cutter body, one end of the blade abuts against the cutter bar, and the other end is abutted by the fastening segment of the fastening screw, one of the vector components of the force of the fastening screw presses the blade to the cutter bar, and balance is achieved; in the plane perpendicular to the axis of the cutter body, the blade is abutted by the shaft sleeve, the positioning pin and the fastening screw from three directions, and more stable positioning is achieved.

[0011] Optionally, the side wall of the blade close to the shaft sleeve comprises two intersecting planes, both of which abut against the shaft sleeve, or the side wall of the blade close to the shaft sleeve comprises two intersecting arc surfaces, both of which abut against the shaft sleeve.

[0012] By adopting the technical scheme, the two planes or arc surfaces of the side wall of the blade abut against the shaft sleeve, the force of the shaft sleeve on the blade is distributed on two support lines or at least two support points, which is more stable than single-point support, and in addition, the arrangement of the two intersecting planes or arc surfaces makes the various sizes of the shaft sleeve compatible and the adjustment more convenient.

[0013] Optionally, the outer wall of the shaft sleeve is a circular truncated cone, and the diameter of the end of the shaft sleeve close to the cutter bar is smaller than the diameter of the end of the shaft sleeve away from the cutter bar.

[0014] By adopting the technical scheme, as the shaft sleeve moves to the direction close to the cutter bar, the outer diameter of the part abutting against the blade increases, and one shaft sleeve can realize the size adjustment of multiple shaft sleeves, in addition, the arrangement of the circular truncated cone exerts pressure on multiple blades in the process of pressing the shaft sleeve to the cutter body, and the blades are pressed to the fastening screw, and the force distribution is more uniform.

[0015] Optionally, the outer wall of the shaft sleeve is divided into multiple segments, the outer diameters of the segments are different, and increase in the direction away from the cutter bar.

[0016] By adopting the technical scheme, as the shaft sleeve moves towards the cutter bar, the outer diameter of the part abutting against the blade increases, one shaft sleeve can realize the fine adjustment of the size of the reamer by multiple shaft sleeves, in addition, the design of multiple outer diameters makes the blade abut against a shaft sleeve at each size, the supporting force of the shaft sleeve on the blade acts on the line, and the support is more stable.

[0017] Optionally, the blade is provided with a boss at a position close to the cutter bar, the shaft sleeve abuts against the boss and has a gap from a position of the blade away from the cutter bar, and the projection length of the shaft sleeve on the axis of the cutter body is less than the projection length of the blade on the axis of the cutter body.

[0018] By adopting the technical scheme, the shaft sleeve is always blocked by the blade during adjustment, so that the tool breaking caused by the protrusion of the shaft sleeve is avoided.

[0019] Optionally, the size-adjustable quick-change reamer further comprises a blade particle, the blade particle is arranged in one-to-one correspondence with the blade, and is located on the side of the corresponding blade away from the axis of the cutter body.

[0020] By adopting the technical scheme, the actual cutting part of the reamer is the blade particle, on the one hand, when the blade particle is worn to the extent that fine adjustment cannot compensate, the cutting function of the reamer can be restored by replacing the blade particle, and on the other hand, the reamer can be assembled with different blade particles to realize different cutting performance, or even multiple blade particles can be assembled on the same reamer to realize a composite effect.

[0021] Optionally, the surface of the blade particle is provided with a polycrystalline diamond layer, or the blade particle is made of polycrystalline diamond; the surface of the blade particle is engraved with an oil groove, and the oil groove is arranged at an angle with the axis of the cutter body.

[0022] By adopting the technical scheme, the wear resistance of the blade particle is increased, the service life of the blade particle is prolonged, the adjustment period of the reamer is prolonged, the oil groove on the surface of the blade particle can temporarily adsorb lubricating oil or cutting fluid, and gradually flows out in the subsequent cutting process, lubricating and cooling the blade particle.

[0023] Optionally, the side wall of the cutter body is further provided with a chip removal groove corresponding to the blade.

[0024] By adopting the technical scheme, the chips generated during cutting, especially the long chips generated by soft metals such as aluminum alloy, will flow out through the chip removal groove, preventing various problems caused by entangled chips.

[0025] Optionally, the cutter body has multiple blades, and the blades are arranged in a circumferential array around the axis of the cutter body.

[0026] By adopting the technical scheme, multiple stations work simultaneously to realize cutting machining on the workpiece, wear of a single station is greatly reduced, and the service life of the reamer and the fine adjustment interval are prolonged.

[0027] To sum up, the present application has at least one of the following beneficial technical effects:

[0028] 1. When the reamer is worn during production and machining, and the degree of wear affects machining precision, the larger size shaft sleeve can be replaced to cooperate with the blade, so that the cutting point of the reamer is moved away from the rotating shaft, the wear of the tool is compensated, and the machining precision of the reamer is maintained, without the need to replace the whole reamer, thereby reducing the maintenance cost of the reamer and the production cost of the workpiece.

[0029] 2. The positioning pin, the shaft sleeve and the fastening screw lock the blade at multiple points, and the shaft sleeve supports the blade from two directions, so that the positioning is more stable.

[0030] 3. The shaft sleeve is designed as a circular truncated cone or a ladder, and the same shaft sleeve can be moved to the blade rod to realize fine adjustment of the wear of the blade.

[0031] 4. The blade and the blade grain are designed in a split manner, so that local replacement can be facilitated after wear, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structure schematic view of the reamer with adjustable size and quick change of embodiment 1 of the present application;

[0033] Figure 2 is a view of the reamer with adjustable size and quick change of embodiment 1 of the present application along the axis of the blade rod;

[0034] Figure 3 is a view along Figure 2 the A-A line in FIG. 4;

[0035] Figure 4 is a view along Figure 3 the B region in FIG. 4;

[0036] Figure 5 is a schematic view of the cooperation of the shaft sleeve and the blade of embodiment 2 of the present application;

[0037] Figure 6 is a schematic view of the cooperation of the shaft sleeve and the blade of embodiment 3 of the present application.

[0038] Explanation of reference signs:

[0039] 1, cutter body; 11, blade rod; 12, blade shaft; 13, shaft sleeve; 14, threaded hole; 2, blade; 21, fastening hole; 22, blade groove; 3, fastening screw; 31, fastening section; 32, threaded section; 4, blade grain; 5, positioning pin. DETAILED DESCRIPTION

[0040] The application will be further described below in conjunction with the accompanying Figures 1-6 The application will be further described below in conjunction with the accompanying

[0041] The application discloses a size-adjustable quick-change reamer.

[0042] Embodiment 1

[0043] With reference to Figure 1 Figure 2 The size-adjustable quick-change reamer comprises a cutter body 1, cutter blades 2, cutter particles 4, fastening screws 3 and positioning pins 5. The cutter blades 2 are fixed to one end of the cutter body 1 for machining workpieces by the fastening screws 3, the cutter particles 4 are arranged in one-to-one correspondence with the cutter blades 2 for cutting workpieces, and the positioning pins 5 are arranged in one-to-one correspondence with the cutter blades 2 and abut against side walls of the cutter blades 2 to fix the cutter blades 2.

[0044] Specifically, the cutter body 1 comprises a cutter rod 11, a cutter shaft 12 and a shaft sleeve 13, all of which are coaxially arranged and are rotary bodies, the end face of the cutter rod 11 close to the cutter blades 2 is a plane perpendicular to the axis of the cutter rod 11, the cutter shaft 12 is fixedly connected to the end face, the shaft sleeve 13 is detachably connected to the cutter shaft 12, and the plurality of cutter blades 2 are distributed in a circumferential array with the axis of the cutter body 1 as the center and abut against the shaft sleeve 13.

[0045] A chip removal groove extending away from the cutter blades 2 is arranged in the side wall of the cutter rod 11 in one-to-one correspondence with the cutter blades 2, and the depth of the chip removal groove gradually decreases until disappearing away from the cutter blades 2, so as to facilitate the outflow of chips, especially soft chips such as aluminum alloy, and prevent the generation of chip lumps.

[0046] Threaded holes 14 are arranged in the end face of the cutter rod 11 close to the cutter blades 2 in one-to-one correspondence with the cutter blades 2.

[0047] The cutter blade 2 is a tensile body, and the side close to the shaft sleeve 13 comprises two planes abutting against the shaft sleeve 13, and the intersection line of the two planes is chamfered, and the chamfer radius is smaller than the radius of the shaft sleeve 13.

[0048] Optionally, the side close to the shaft sleeve 13 of the cutter blade 2 comprises two arc surfaces abutting against the shaft sleeve 13, the curvature centers of the arc surfaces are located outside the cutter blade 2 and close to the side close to the shaft sleeve 13, the intersection line of the two arc surfaces is chamfered, and the chamfer radius is smaller than the radius of the shaft sleeve 13, and the radius of each arc surface is greater than the radius of the shaft sleeve 13.

[0049] ​The blade 2 is provided with a blade slot 22 on the side away from the sleeve 13, the blade grain 4 is detachably connected in the blade slot 22 and has at least two surfaces abutting with the blade slot 22, the blade grain 4 partially protrudes from the side surface of the blade 2 and the blade rod 11, so that the hole cavity is cut by the blade grain 4 when the cutter body 1 rotates. During cutting, the acting surface of the blade slot 22 and the blade grain 4 is preferably radial with the axis of the blade rod 11 as the center, or the normal line of the acting surface of the blade slot 22 is inclined to the axis direction of the cutter body 1, so that the blade grain 4 has the tendency to slide and press tightly to the blade 2 under force, preventing unstable connection.

[0050] Optionally, the blade grain 4 and the blade slot 22 are provided with a convex rib and a groove structure, and the convex rib and the groove are engaged after the blade grain 4 and the blade slot 22 are tightened by using a screw.

[0051] Optionally, the blade grain 4 and the blade slot 22 are welded and fixed.

[0052] Optionally, the surface of the blade grain 4 is engraved with an oil groove, which is preferably perpendicular to the axis of the cutter body 1, for temporarily storing lubricating oil or cutting fluid during processing, and gradually flowing out during the next cutting process, lubricating and cooling the blade grain 4.

[0053] Optionally, one side of the blade grain 4 for cutting is coated with diamond or polycrystalline diamond coating, or the blade grain 4 is made of polycrystalline diamond, so as to increase the wear resistance of the blade grain 4 and prolong its service life.

[0054] The positioning pin 5 is provided one by one corresponding to the blade 2, and the axis of the positioning pin 5 is parallel to the axis of the cutter body 1, and the side wall of the blade 2 away from the sleeve 13 and away from the blade grain 4 abuts against the positioning pin 5.

[0055] Reference Figure 3 , Figure 4 The center of the blade 2 is provided with a fastening hole 21, the fastening hole 21 is a circular truncated cone, the axis thereof is parallel to the axis of the cutter body 1, the bottom surface near the end of the blade rod 11 has a diameter equal to or smaller than the inner diameter of the threaded hole 14, and smaller than the diameter of the bottom surface of the fastening hole 21 away from the end of the blade rod 11. The fastening screw 3 is threadedly connected with the threaded hole 14 of the cutter body 1 through the fastening hole 21, the fastening screw 3 includes a threaded section 32 and a fastening section 31, the size and thread parameters of the threaded section 32 are matched with the threaded hole 14, the fastening section 31 is a circular truncated cone, the end surface near the threaded section 32 has a diameter larger than that of the threaded section 32, and the end surface away from the threaded section 32 has a diameter larger than that of the end surface near the threaded section 32, and the inclined angle of the fastening section 31 is equal to that of the fastening hole 21. Alternatively, the hole wall of the fastening hole 21 includes an arc surface protruding towards the fastening screw 3, for cooperating with the fastening section 31.

[0056] One side of the fastening section 31 abuts against the fastening hole 21, and the blade 2 is pressed towards the sleeve 13 and the positioning pin 5 for locking.

[0057] Preferably, the head of the fastening screw 3 is hexagonally opened.

[0058] The implementation principle of the embodiment 1 is as follows:

[0059] In the axial direction of the tool bar 11, one side of the blade 2 is attached to the end surface of the tool bar 11, the fastening hole 21 is pressed by the fastening screw 3, one component of the force will press the blade 2 to the tool bar 11 to achieve force balance, in the plane perpendicular to the axial direction of the tool bar 11, the blade 2 is positioned by the fastening screw 3, the positioning pin 5 and the shaft sleeve 13, wherein the blade 2 has two contact lines with the shaft sleeve 13, and the blade 2 has one contact line with the fastening screw 3 and the positioning pin 5 respectively.

[0060] The material of the blade 4 and the arrangement of the multiple blades 2 and the blade 4 can effectively prolong the service life of the blade 4, when the blade 4 is worn to the extent that the machining precision is affected, the reamer is stopped, the fastening screw 3 is rotated and loosened, the blade 2 is separated from the positioning pin 5 and the shaft sleeve 13, the original shaft sleeve 13 is removed, a larger shaft sleeve 13 is assembled, and then the fastening screw 3 is tightened, the fastening segment 31 of the fastening screw 3 is in contact with the fastening hole 21 of the blade 2, and the blade 2 is pushed to be in contact with the positioning pin 5 and the shaft sleeve 13, in the process of contact, the blade 2 will adaptively rotate to make the two curved surfaces or planes on the side close to the shaft sleeve 13 stably contact the shaft sleeve 13.

[0061] When the size of the shaft sleeve 13 changes, in order to be attached to the larger-diameter shaft sleeve 13, the blade 2 will move away from the axis of the tool bar 11, the blade 4 will move away from the axis of the tool bar 11 along with the blade 2, that is, the smaller blade 4 after wear moves away from the rotation axis, so that the distance between the outer edge of the blade 4 and the rotation axis remains unchanged, so as to fine-tune to ensure the accuracy of the hole reaming or expanding, in most reaming machining, the fine-tuning range is within 0.2 mm.

[0062] It should be noted that the locking of the blade 2 in the embodiment must be completed by the fastening screw 3, and cannot be achieved by embedding the shaft sleeve 13 to be locked, all the blades 2 are locked in the process of tightening the fastening screw 3, which is conducive to ensuring the circumferential array arrangement of the blades 2 and the blade 4.

[0063] When the wear of the blade 4 exceeds the adjustment range, or in the process of machining, the blade 4 is directly broken due to overheating, collision and other reasons, the corresponding blade 4 can be disassembled and replaced with a new blade 4 without replacing the entire reamer.

[0064] Because the blades 2 and the grains 4 in the embodiment are arranged in a circumferential array, the wear of each grain 4 is roughly the same in actual production and processing, but it cannot be ruled out that the wear of a grain 4 is greater than that of other grains 4 due to quality reasons or tool setting techniques. In this case, the reamer can be operated normally, and other grains 4 will catch up with the wear of the grain 4 in the subsequent processing at a greater wear rate; or the fastening screw 3 corresponding to the grain 4 can be unscrewed, a gasket can be inserted between the corresponding blade 2 and the shaft sleeve 13, and then the corresponding fastening screw 3 can be tightened, so that the single grain 4 is farther away from the axis of the blade bar 11 than other grains 4, to achieve fine adjustment after the single grain 4 is excessively worn.

[0065] Embodiment 2

[0066] With reference to Figure 5 The difference between the embodiment and embodiment 1 is that:

[0067] The outer wall of the shaft sleeve 13 in the embodiment is divided into multiple sections, and the outer diameter of each section is different and increases in the direction away from the blade bar 11.

[0068] Optionally, the blade 2 is provided with a boss near the blade bar 11, and the shaft sleeve 13 abuts against the boss; at a position away from the blade bar 11, there is a gap between the blade 2 and the shaft sleeve 13, and the projection of the shaft sleeve 13 on the axis of the blade bar 11 is contained in the projection of the blade 2 on the blade bar 11, so as to avoid the protruding shaft sleeve 13 from colliding with the workpiece and affecting the processing.

[0069] The implementation principle of embodiment 2 is that:

[0070] When the grain 4 is worn to an extent that affects the processing accuracy, the fastening screws 3 are unscrewed, the blade 2 is loosened, the shaft sleeve 13 is pushed towards the blade bar 11 by a certain distance, the diameter of the abutting part of the shaft sleeve 13 and the blade 2 is increased, and finally the fastening screws 3 are tightened to make the blade 2 abut against the shaft sleeve 13 and the positioning pin 5 stably.

[0071] In the embodiment, the shaft sleeve 13 only needs to be pushed towards the blade bar 11 to fine-tune the blade 2 and compensate for the wear of the grain 4, without the need to replace shaft sleeves 13 of different sizes, and the operation is more convenient.

[0072] Embodiment 3

[0073] With reference to Figure 6 The difference between the embodiment and embodiment 2 is that:

[0074] The outer wall of the shaft sleeve 13 is a circular truncated cone, the bottom surface near the blade bar 11 is smaller than the bottom surface away from the blade bar 11, and the shaft sleeve 13 is threadedly connected with the blade shaft 12.

[0075] The implementation principle of the embodiment 3 is:

[0076] When the cutter 4 is worn enough to affect the machining precision, the fastening screws 3 are loosened to the same extent, the cutter 2 is loosened, the sleeve 13 is clamped, the sleeve 13 is screwed towards the cutter bar 11, the larger diameter cross section of the sleeve 13 abuts against the boss, the cutter 2 is pushed away from the axis of the cutter bar 11 until the cutter 2 abuts against the fastening screws 3 and the positioning pin 5.

[0077] In the embodiment, the loosened cutter 2 is locked by the sleeve 13 instead of the fastening screws 3, compared with screwing each fastening screw 3, the embodiment realizes the locking of multiple cutters 2 in one rotation step of the sleeve 13, and avoids the deviation caused by the fixing in sequence.

[0078] Optionally, the assembly of the cutter 2 can also be finally locked by the sleeve 13 in the embodiment.

[0079] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, therefore: all equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A quick-change reamer with adjustable dimensions, characterized in that, The tool includes a blade body (1), a fastening screw (3), and a blade (2) disposed at one end of the blade body (1). The blade body (1) includes a blade bar (11), a blade shaft (12), and a bushing (13) arranged coaxially. The blade shaft (12) is fixedly connected to the end of the blade bar (11) near the blade (2), and the bushing (13) is detachably connected to the blade shaft (12). The blade (2) has a frustum-shaped fastening hole (21), and the shank (11) has a threaded hole (14) corresponding to the fastening hole (21). The fastening screw (3) includes a threaded section (32) and a frustum-shaped fastening section (31). The diameter of the threaded section (32) is smaller than the minimum diameter of the fastening section (31). The chamfer of the fastening hole (21) is equal to the chamfer of the fastening section (31). The fastening screw (3) passes through the fastening hole (21) and connects to the threaded hole (14). The threaded section (32) mates with the threaded hole (14). One side of the fastening section (31) abuts against the fastening hole (21). The blade (2) abuts against the bushing (13). The adjustable quick-change reamer also includes a positioning pin (5), which is located on the end face of the shank (11) near the blade (2). The positioning pin (5) is provided in a one-to-one correspondence with the blade (2) and abuts against each other. One side of the fastening section (31) abuts against the fastening hole (21) to press the blade (2) against the bushing (13) and the positioning pin (5) for locking.

2. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, The blade (2) near the side wall of the bushing (13) includes two intersecting planes, both of which abut against the bushing (13); or, the blade (2) near the side wall of the bushing (13) includes two intersecting arc surfaces, both of which abut against the bushing (13).

3. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, The outer wall of the bushing (13) is a frustum, and the diameter of the bushing (13) near the end of the tool holder (11) is smaller than the diameter of the bushing (13) away from the tool holder (11).

4. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, The outer wall of the bushing (13) is divided into multiple segments, each with a different outer diameter, which increases in the direction away from the tool holder (11).

5. The quick-change reamer with adjustable dimensions according to any one of claims 3-4, characterized in that, The blade (2) has a boss near the shank (11), the bushing (13) abuts against the boss and has a gap with the blade (2) away from the shank (11), and the projected length of the bushing (13) on the axis of the blade body (1) is less than the projected length of the blade (2) on the axis of the blade body (1).

6. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, The adjustable-size quick-change reamer also includes a cutting edge (4), which is arranged in a one-to-one correspondence with the blade (2) and is located on the side of the axis of the blade (2) away from the blade body (1).

7. The quick-change reamer with adjustable dimensions according to claim 6, characterized in that, The surface of the blade (4) is provided with a polycrystalline diamond layer, or the blade (4) is made of polycrystalline diamond; The surface of the cutting tool (4) is engraved with an oil groove, which is set at an angle to the axis of the cutting tool body (1).

8. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, The side wall of the blade body (1) is also provided with chip removal grooves that correspond one-to-one with the blade (2).

9. The quick-change reamer with adjustable dimensions according to claim 1, characterized in that, There are multiple blades (2), and the blades (2) are arranged in a circular array with the axis of the blade body (1) as the center.

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