Cutter assembly for machining carbon fiber composite product

Abstract

The invention relates to the technical field of carbon fiber processing, and discloses a cutter assembly for processing a carbon fiber composite product, which is mounted on a machine tool and comprises a transmission cylinder and a drill bit, the drill bit is connected with the transmission cylinder, the drill bit has a first state and a second state, and in the first state and the second state, the lower end of the drill bit extends out of the bottom of the transmission cylinder; according to the limiting mechanism, when the cutting edge is abraded to a certain degree, namely, the downward pressure applied to the carbon fiber workpiece by the drill bit and the counter-acting force borne by the drill bit reach a certain degree, the limiting mechanism relieves limitation on the drill bit and drives the drill bit to move from the first state to the second state, so that the drill bit slides and ascends in the transmission cylinder; and the cutting edge part at the lower end of the drill bit is separated from the carbon fiber workpiece, and the drilling work on the carbon fiber workpiece is canceled, so that the damage to the carbon fiber workpiece caused by continuous drilling work is avoided, and the unnecessary economic loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon fiber processing, and specifically to a tool assembly for processing carbon fiber composite products. Background Art

[0002] Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers. It is made from acrylic fibers and viscose fibers as raw materials, and is formed by high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace.

[0003] For example, the patent with the publication number CN110090994B and the publication date of June 19, 2020 discloses a segmented hybrid-edge cross-chip-breaking tool for spiral milling of wing laminated structures, which relates to the technical field of tools. It includes a cutting head, a spiral side edge part, a tool neck and a tool shank connected in sequence; the axis of the cutting head coincides with the axis of the tool and includes three evenly distributed cutting teeth, and the end edge of each cutting tooth is a segmented hybrid edge type. The segmented hybrid edge type includes a first straight edge, a second curved edge, a third curved edge, a fourth straight edge, a fifth straight edge, a sixth straight edge and a seventh straight edge connected in sequence. One end of the side edge of the cutting tooth away from the spiral side edge part is located at the center of the tool, and the three first straight edges are all close to the center of the tool and are connected to each other; the spiral side edge part includes three side edges corresponding to and connected to the end edges of the respective cutting teeth, and one end of the side edge away from the cutting head is connected to the tool neck; the heights between the second curved edge and the third curved edge relative to the center of the tool are different, and the radii of curvature of the second curved edge and the third curved edge are different; the distance between the second curved edge and the center of the tool is less than the distance between the third curved edge and the center of the tool.

[0004] The hardness of carbon fiber is close to that of metal, and the fiber itself has strong abrasiveness, which will continuously wear the tool edge like sandpaper, resulting in an increasing wear of the tool edge. Moreover, when the existing drilling equipment is in use, the feed speed, that is, the lifting speed, of the driven tool is constant. After the tool wears, the drilling efficiency of the tool for carbon fiber workpieces decreases. Due to the constant feed speed of the tool, when the worn tool still descends at the speed before wear, an additional pressure will be applied to the carbon fiber workpiece. The greater the wear of the tool, the greater the downward pressure exerted by the tool on the carbon fiber workpiece during drilling. The greater downward pressure will cause the carbon fiber workpiece to be squeezed and broken, resulting in damage to the carbon fiber workpiece. Also, the cost of carbon fiber workpieces is relatively high, which will also cause certain economic losses. Summary of the Invention

[0005] The purpose of the present invention is to provide a tool assembly for processing carbon fiber composite products to solve the above deficiencies in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A tool assembly for processing carbon fiber composite products, which is installed on a machine tool and includes a transmission cylinder and a drill bit. The drill bit is connected to the transmission cylinder. The drill bit has a first state and a second state. In the first state and the second state, the lower end of the drill bit extends out of the bottom of the transmission cylinder. In the first state, the extension length of the drill bit is greater than the extension length of the drill bit in the second state. A limiting mechanism is installed in the transmission cylinder, and the limiting mechanism is used to adjust the drill bit to move from the first state to the second state.

[0007] Preferably, the limiting mechanism includes a spring, a first convex block and a second convex block. The first convex block is installed in the transmission cylinder. One end of the drill bit located in the transmission cylinder is provided with an adapter block. The second convex block is installed on the outer wall of the adapter block. The lower end of the spring is connected to the adapter block, and the upper end is connected to the transmission cylinder.

[0008] Preferably, a sliding groove is formed inside the transmission cylinder. A sliding block is installed on the outer wall of the adapter block. The sliding block is located inside the sliding groove and forms a sliding guiding fit with the sliding groove.

[0009] Preferably, the upper end of the drill bit is detachably connected to the adapter block.

[0010] Preferably, a threaded hole is formed inside the adapter block. The upper end of the drill bit is located in the threaded hole and is threadedly connected to the adapter block through the threaded hole.

[0011] Preferably, a locking assembly is further installed on the adapter block. The locking assembly drives the drill bit and the adapter block to be locked to each other when the drill bit is in the first state, and releases the separation between the drill bit and the adapter block when in the second state. Through the setting of the locking assembly.

[0012] Preferably, a limiting groove is formed on the outer wall of the adapter block. A connecting rod is rotatably installed inside the limiting groove. One end of the connecting rod is connected to the second convex block, and the other end extends into the limiting groove and fits against the upper groove wall of the limiting groove. The rotational connection between the connecting rod and the adapter block is located in the middle of the connecting rod.

[0013] Preferably, the locking assembly includes a first wedge block, a clamping block and a second wedge block. A receiving groove is further formed inside the adapter block. The first wedge block, the clamping block and the second wedge block are all installed inside the receiving groove. The first wedge block and the clamping block are both arranged horizontally, and the second wedge block is arranged vertically. The first wedge block and the second wedge block form a wedge-shaped fit. One end of the clamping block is fixedly connected to the first wedge block, and the other end extends out of the inner opening of the receiving groove and enters the threaded hole. A clamping groove is formed on the outer wall of the upper end of the drill bit. The clamping block and the clamping groove form a limiting and abutting fit.

[0014] Preferably, a support plate is further installed in the transmission cylinder. The support plate is horizontally arranged in the transmission cylinder, and the upper end of the spring is fixedly connected to the support plate.

[0015] Preferably, the first wedge block has an isosceles trapezoid structure.

[0016] The beneficial effects of the present invention are as follows: In the above technical solution, when the cutting edge of the present invention wears to a certain extent, that is, when the downward pressure exerted by the drill bit on the carbon fiber workpiece and the reaction force received by the drill bit reach a certain level, the limiting mechanism releases the restriction on the drill bit and drives the drill bit to move from the first state to the second state, causing the drill bit to slide upward inside the transmission cylinder, so that the cutting edge part at the lower end of the drill bit disengages from the carbon fiber workpiece and cancels the drilling operation on the carbon fiber workpiece, avoiding damage to the carbon fiber workpiece caused by continuous drilling work and reducing unnecessary economic losses. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the installation structure of the tool assembly provided by the embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the tool assembly structure provided by the embodiment of the present invention;

[0020] Figure 3 Internal cross-sectional view of the tool assembly provided by the embodiment of the present invention;

[0021] Figure 4 Provided by the embodiment of the present invention Figure 3 Enlarged view of part A in

[0022] Description of the reference numerals:

[0023] 1. Transmission cylinder; 11. Slide groove; 12. Support plate; 2. Drill bit; 21. Card slot; 3. Limiting mechanism; 31. Spring; 32. First convex block; 33. Second convex block; 34. Connecting block; 35. Threaded hole; 36. Locking assembly; 361. First wedge block; 362. Block; 363. Second wedge block; 364. Receiving groove; 37. Limiting groove; 38. Connecting rod. Detailed Embodiments

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further introduce the present invention in detail in conjunction with the drawings.

[0025] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus should not be construed as a limitation on the present invention. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] As Figures 1-4 shown, an embodiment of the present invention provides a tool assembly for processing carbon fiber composite products, which is installed on a machine tool and includes a transmission cylinder 1 and a drill bit 2. The drill bit 2 is connected to the transmission cylinder 1. The drill bit 2 has a first state and a second state. In both the first state and the second state, the lower end of the drill bit 2 extends out of the bottom of the transmission cylinder 1. In the first state, the extension length of the drill bit 2 is greater than that in the second state. A limiting mechanism 3 is installed in the transmission cylinder 1, and the limiting mechanism 3 is used to adjust the drill bit 2 to move from the first state to the second state.

[0027] Specifically, the tool assembly is installed on the machine tool. There are multiple driving mechanisms on the machine tool that can drive the tool assembly to move along the X and Y axes, rotate, and descend. This is prior art and will not be elaborated here. The central axes of the transmission cylinder 1 and the drill bit 2 are collinear. Now, the drill bit 2 is equally divided into upper, middle, and lower parts. In the first state, the middle and lower parts of the drill bit 2 extend out of the transmission cylinder 1, and only the upper part is accommodated inside the transmission cylinder 1. In the second state, the middle and upper parts of the drill bit 2 are accommodated inside the transmission cylinder 1, and only the lower part extends out of the transmission cylinder 1. It can be understood that the drill bit 2 is slidably connected to the transmission cylinder 1. In the normal use state, the limiting mechanism 3 limits and fixes the drill bit 2 in the first state. The driving mechanism drives the transmission cylinder 1 and the drill bit 2 to descend and rotate synchronously. As the drill bit 2 is used for a long time, the cutting edge at the end of the drill bit 2 will gradually be worn. The wear causes the drill bit 2 to descend and apply an additional downward pressure on the carbon fiber workpiece. Due to the reciprocity of forces, the drill bit 2 will also receive a corresponding upward reaction force. When the cutting edge is worn to a certain extent, that is, when the downward pressure applied by the drill bit 2 on the carbon fiber workpiece and the reaction force received by the drill bit 2 reach a certain level, the limiting mechanism 3 releases the restriction on the drill bit 2 and drives the drill bit 2 to move from the first state to the second state, causing the drill bit 2 to slide and rise inside the transmission cylinder 1, so that the cutting edge part at the lower end of the drill bit 2 is separated from the carbon fiber workpiece, and the drilling work on the carbon fiber workpiece is cancelled, avoiding damage to the carbon fiber workpiece caused by continuous drilling work and reducing unnecessary economic losses.

[0028] More specifically, the limit mechanism 3 includes a spring 31, a first convex block 32 and a second convex block 33. The first convex block 32 is installed inside the transmission cylinder 1. One end of the drill bit 2 located inside the transmission cylinder 1 is installed with an adapter block 34. The second convex block 33 is installed on the outer wall of the adapter block 34. The lower end of the spring 31 is connected to the adapter block 34, and the upper end is connected to the transmission cylinder 1. A chute 11 is opened inside the transmission cylinder 1. A slider is installed on the outer wall of the adapter block 34. The slider is located inside the chute 11 and forms a sliding guiding fit with the chute 11. The direction of the chute 11 is consistent with the axial direction of the transmission shaft. Through the setting of the chute 11, it is restricted that the adapter block 34 can only vertically lift and lower inside the transmission cylinder 1, so that when the transmission shaft rotates under the drive of the drive mechanism, the adapter block 34 can rotate synchronously with the transmission shaft. In the first state, the spring 31 is in a stretched state, and the second convex block 33 is located below the first convex block 32. When the downward pressure applied by the drill bit 2 to the carbon fiber workpiece and the reaction force received by the drill bit 2 reach a certain level, the drill bit 2 will tend to move upward under the influence of the reaction force. At this time, the adapter block 34 drives the second convex block 33 to rise synchronously. Under the influence of the reaction force, the second convex block 33 squeezes the first convex block 32 to deform and crosses over the first convex block 32. After losing the restriction of the first convex block 32, the spring 31 instantaneously resets and contracts, and drives the adapter block 34 to move the drill bit 2 to rise synchronously. At this time, the second state of the drill bit 2 is reached, that is, the second convex block 33 is located above the first convex block 32. In this embodiment, the first convex block 32 has good elasticity and fatigue resistance, and it can be an engineering plastic such as polyether ether ketone. The second convex block 33 has relatively high hardness and strength, and it can be a metal or a high-hardness plastic.

[0029] In another embodiment of the present invention, further, the upper end of the drill bit 2 is detachably connected to the adapter block 34.

[0030] Specifically, a threaded hole 35 is opened inside the adapter block 34. The upper end of the drill bit 2 is located inside the threaded hole 35 and is threadedly connected to the adapter block 34 through the threaded hole 35. Due to the setting of the chute 11 inside the transmission cylinder 1, the adapter block 34 cannot rotate inside the transmission cylinder 1. Therefore, when the drill bit 2 is in the second state, rotating the part of the drill bit 2 extending out of the transmission cylinder 1 can remove the drill bit 2 from the adapter block 34 to realize the replacement of the drill bit 2. In this embodiment, a detachable connection method of threaded connection is adopted. In other embodiments, a detachable connection method such as a snap fastener can also be adopted.

[0031] Secondly, a locking component 36 is also installed on the connecting block 34. When the drill bit 2 is in the first state, the locking component 36 drives the drill bit 2 and the connecting block 34 to be locked with each other. When in the second state, the locking between the drill bit 2 and the connecting block 34 is released. Through the setting of the locking component 36, in the first state, on the basis of the detachable connection between the drill bit 2 and the connecting block 34, the drill bit 2 and the connecting block 34 are further locked to avoid the problems of mutual detachment or becoming too tight between the drill bit 2 and the connecting block 34, which may cause the phenomenon that the drill bit 2 is difficult to be removed from the connecting block 34.

[0032] When the drill bit 2 is being replaced, that is, when the drill bit 2 is in the second state, the locking component 36 releases the locking between the connecting block 34 and the drill bit 2. Then the staff rotates the drill bit 2 so that the upper end of the drill bit 2 disengages from the threaded hole 35 in the connecting block 34. Then the drill bit 2 can be taken out from the inside of the transmission cylinder 1. Finally, the unworn drill bit 2 is reinserted into the transmission cylinder 1 and threadedly installed in the connecting block 34. Finally, the locking component 36 locks the connecting block 34 and the drill bit 2 again, and pulls down the drill bit 2 after installation, that is, the drill bit 2 descends in the transmission cylinder 1 and drives the connecting block 34 to descend synchronously. At this time, the spring 31 starts to reset and stretch until the second convex block 33 passes over the first convex block 32 again, and the second convex block 33 resets to below the first convex block 32. At this time, the drill bit 2 resets to the first position, and the limit block of the first convex block 32 against the second convex block 33 can also keep the spring 31 in the stretched state.

[0033] During the reset process, that is, when the drill bit 2 resets from the second state to the first state, it is a manual operation by the staff, and the first convex block 32 still blocks the second convex block 33. Therefore, it is difficult for the staff's manual operation to cause the second convex block 33 to squeeze the first convex block 32 to deform during the reset process, and the continuous deformation of the first convex block 32 will also reduce its fatigue degree and service life. Therefore, to solve the above technical problems, in another embodiment of the present invention, further, a limiting groove 37 is opened on the outer wall of the connecting block 34, a connecting rod 38 is rotatably installed inside the limiting groove 37, one end of the connecting rod 38 is connected to the second convex block 33, and the other end extends into the limiting groove 37 and fits against the upper groove wall of the limiting groove 37. The rotational connection between the connecting rod 38 and the connecting block 34 is located in the middle of the connecting rod 38.

[0034] Specifically, in the first state, the connecting rod 38 is horizontally arranged, and the end of the connecting rod 38 away from the connecting block 34 is connected to the second convex block 33, as Figure 3As shown, during actual use, when the cutting edge of the drill bit 2 wears, the drill bit 2 is subject to a reaction force exerted by the carbon fiber board during operation. When the reaction force reaches a certain level, the connecting block 34 drives the second convex block 33 to rise synchronously. The second convex block 33 squeezes the first convex block 32 to cause deformation and then crosses over the first convex block 32. Since the end of the connecting rod 38 away from the second convex block 33 abuts against the upper groove wall of the limiting groove 37, that is, the end of the connecting rod 38 away from the second convex block 33 cannot rise. Under the lever principle, the end of the connecting rod 38 close to the second convex block 33 also cannot descend. Therefore, although the second convex block 33 at one end of the connecting rod 38 is blocked by the first convex block 32, the connecting rod 38 will remain stationary and unable to rotate, enabling the second convex block 33 to cross over the first convex block 32 only after receiving a certain reaction force. That is, after the reaction force reaches a certain level, the second convex block 33 will squeeze the first convex block 32 to cause deformation and then cross over the first convex block 32. After crossing over the first convex block 32, with the obstruction of the first convex block 32 removed, the spring 31 starts to contract, and the drill bit 2 moves from the first state to the second state. At this time, the locking assembly 36 releases the lock between the connecting block 34 and the drill bit 2;

[0035] Subsequently, when the drill bit 2 is replaced and needs to be reset from the second state to the first state, the staff pulls down the lower end of the drill bit 2 in the second state. The downward movement of the drill bit 2 drives the connecting block 34 to slide down synchronously within the transmission cylinder 1. Subsequently, the second convex block 33 comes into contact with the first convex block 32. Under the obstruction of the first convex block 32 and the continuous rotation of the drill pipe, the connecting rod 38 starts to rotate, that is, the end of the connecting rod 38 where the second convex block 33 is installed starts to rise, and the other end located within the limiting groove 37 starts to descend. Through the rotation of the connecting rod 38, the second convex block 33 can easily cross over the first convex block 32 during the descending process without causing deformation of the first convex block 32, reducing the problem of the first convex block 32 being frequently deformed and reducing its fatigue strength. Secondly, a torsion spring is also installed at the active connection between the connecting rod 38 and the connecting block 34 for the reset of the connecting rod 38 after rotation.

[0036] In summary, the arrangement of the connecting rod 38 and the connecting block 34 forms an indirect one-way mechanism. When the second convex block 33 rises, the connecting rod 38 enables the second convex block 33 to cross over the first convex block 32 only by squeezing the first convex block 32 to cause deformation. That is, when the drill bit 2 moves from the first state to the second state, the rotation of the connecting rod 38 enables the second convex block 33 to easily cross over the first convex block 32.

[0037] In an optional embodiment, preferably, the locking assembly 36 includes a first wedge block 361, a clamping block 362 and a second wedge block 363. A receiving groove 364 is also provided inside the connecting block 34. The first wedge block 361, the clamping block 362 and the second wedge block 363 are all installed inside the receiving groove 364. The first wedge block 361 and the clamping block 362 are both arranged horizontally, and the second wedge block 363 is arranged vertically. The first wedge block 361 and the second wedge block 363 form a wedge-shaped fit. One end of the clamping block 362 is fixedly connected to the first wedge block 361, and the other end extends from the inner opening of the receiving groove 364 and enters the threaded hole 35. A clamping groove 21 is provided on the outer wall of the upper end of the drill bit 2. The clamping block 362 and the clamping groove 21 form a limiting interference fit. A support plate 12 is also installed in the transmission cylinder 1. The support plate 12 is horizontally arranged in the transmission cylinder 1, and the upper end of the spring 31 is fixedly connected to the support plate 12.

[0038] Specifically, when the drill bit 2 is in the first state, the end of the clamping block 362 away from the first wedge block 361 is located in the clamping groove 21, the second wedge block 363 extends from the upper end opening of the receiving groove 364, and the end of the first wedge block 361 away from the clamping block 362 extends from the outer opening of the receiving groove 364 and enters the limiting groove 37, and forms a wedge-shaped fit with the connecting rod 38, and the first wedge block 361 is an isosceles trapezoidal structure;

[0039] When the drill bit 2 moves from the first state to the second state, the connecting block 34 is attached to the lower surface of the support plate 12 after rising, and the second wedge block 363 is driven to descend in the receiving groove 364 by the obstruction and forcing of the support plate 12. The second wedge block 363 uses its wedge-shaped cooperation with the first wedge block 361 to drive the first wedge block 361 to move to the side away from the drill rod, and drives the clamping block 362 to move synchronously, so that the end of the first wedge block 361 away from the clamping block 362 extends into the limiting groove 37, and at the same time, one end of the clamping block 362 is disengaged from the clamping groove 21 in the drill rod. At this time, the locking of the connecting block 34 and the drill rod is released, and the staff can remove the drill rod from the connecting block 34 by rotating it, and then replace it;

[0040] When the drill bit 2 is reset and moved from the second state to the first state, the operator pulls down the drill bit 2 to drive the connection to descend synchronously. During the descent, the second bump 33 abuts against the first bump 32, causing the connecting rod 38 to rotate during the descent, that is, the end of the connecting rod 38 located in the limiting groove 37 rotates downward, and during the rotation, it contacts the end of the first wedge block 361 extending into the limiting groove 37. Through the wedge-shaped fit between the connecting rod 38 and the first wedge block 361, the first wedge block 361 is driven to move away from the connecting rod 38, and the latch 362 is driven to move synchronously, so that one end of the latch 362 extends out of the receiving groove 364 and enters the card slot 21 on the outer wall of the drill bit 2. At the same time, the second wedge block 363 rises in the receiving groove 364 under the push of the first wedge block 361, that is, the upper end of the second wedge block 363 extends out of the upper opening of the receiving groove 364 again. Through the rotation of the connecting rod 38, the drill bit 2 is locked on the connecting block 34 during the reset process of the drill bit 2;

[0041] Secondly, when the drill bit 2 is rotatably installed inside the threaded hole 35 and the inner opening of the receiving groove 364 cannot be aligned with the card slot 21 due to too few rotation turns, the latch 362 will abut against the outside of the drill bit 2 and cannot move further. At the same time, the first wedge block 361 cannot move either, and the end of the connecting rod 38 located in the limiting groove 37 cannot rotate downward, and the second bump 33 cannot cross the first bump 32 either. Therefore, when the operator feels resistance to the descent of the drill bit 2 during this reset process, it means that the second bump 33 has not crossed the first bump 32 and the rotation of the connecting rod 38 is blocked, which means that the card slot 21 is not aligned with the inner opening of the receiving groove 364. At this time, the drill bit 2 needs to be readjusted until the drill bit 2 can descend to the initial position without resistance, to avoid the drill bit 2 falling off or becoming tighter and tighter during subsequent use.

[0042] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cutting tool assembly for processing carbon fiber composite products, which is installed on a machine tool, and is characterized in that, The invention comprises a transmission cylinder (1) and a drill bit (2), wherein the drill bit (2) is connected to the transmission cylinder (1), and the drill bit (2) has a first state and a second state. In the first state and the second state, the lower end of the drill bit (2) extends out of the bottom of the transmission cylinder (1), and the extension length of the drill bit (2) in the first state is greater than the extension length of the drill bit (2) in the second state. A limiting mechanism (3) is installed in the transmission cylinder (1), and the limiting mechanism (3) is used to adjust the movement of the drill bit (2) from the first state to the second state.

2. The cutting tool assembly for processing carbon fiber composite products according to claim 1, wherein, The limiting mechanism (3) comprises a spring (31), a first protrusion (32) and a second protrusion (33); the first protrusion (32) is installed in the transmission cylinder (1); a connecting block (34) is installed at one end of the drill bit (2) located in the transmission cylinder (1); the second protrusion (33) is installed on the outer wall of the connecting block (34); the lower end of the spring (31) is connected to the connecting block (34), and the upper end is connected to the transmission cylinder (1).

3. The cutting tool assembly for processing carbon fiber composite products according to claim 1, characterized in that, A slide groove (11) is provided inside the transmission cylinder (1), and a sliding block is installed on the outer wall of the connecting block (34). The sliding block is located inside the slide groove (11) and forms a sliding guide with the slide groove (11).

4. The cutting tool assembly for processing carbon fiber composite products according to claim 2, wherein, The upper end of the drill bit (2) is detachably connected to the connecting block (34).

5. The cutting tool assembly for processing carbon fiber composite products according to claim 2, characterized in that, A threaded hole (35) is provided inside the connection block (34), the upper end of the drill bit (2) is located in the threaded hole (35) and is threadedly connected to the connection block (34) through the threaded hole (35).

6. The cutting tool assembly for processing carbon fiber composite products according to claim 2, characterized in that, A locking assembly (36) is also installed on the connecting block (34). The locking assembly (36) drives the drill bit (2) and the connecting block (34) to lock each other when the drill bit (2) is in a first state, and releases the drill bit (2) and the connecting block (34) from being separated from each other in a second state. The locking assembly (36) is set.

7. The cutting tool assembly for processing carbon fiber composite products according to claim 6, characterized in that The outer wall of the connecting block (34) is provided with a limiting groove (37), and a connecting rod (38) is rotatably installed inside the limiting groove (37). One end of the connecting rod (38) is connected to the second protrusion (33), and the other end extends into the limiting groove (37) and fits the upper groove wall of the limiting groove (37). The rotation connection between the connecting rod (38) and the connecting block (34) is located in the middle of the connecting rod (38).

8. A tool assembly for processing a carbon fiber composite product according to claim 7, wherein, The locking assembly (36) comprises a first wedge block (361), a clamping block (362) and a second wedge block (363). A receiving groove (364) is further provided inside the connecting block (34). The first wedge block (361), the clamping block (362) and the second wedge block (363) are all installed inside the receiving groove (364). The first wedge block (361) and the clamping block (362) are both arranged horizontally, and the second wedge block (363) is arranged vertically. The first wedge block (361) and the second wedge block (363) form a wedge-shaped fit. One end of the clamping block (362) is fixedly connected to the first wedge block (361), and the other end extends from the inner opening of the receiving groove (364) and enters the threaded hole (35). A clamping groove (21) is provided on the outer wall of the upper end of the drill bit (2). The clamping block (362) and the clamping groove (21) form a limiting contact fit.

9. The cutting tool assembly for processing carbon fiber composite products according to claim 2, characterized in that, A support plate (12) is also installed inside the transmission cylinder (1). The support plate (12) is horizontally arranged inside the transmission cylinder (1), and the upper end of the spring (31) is fixedly connected to the support plate (12).

10. The cutting tool assembly for processing carbon fiber composite products according to claim 8, characterized in that, The first wedge block (361) has an isosceles trapezoid structure.

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