CN210589679U - Step-by-step drilling device for carbon fiber composite material - Google Patents

Abstract

The utility model discloses a stepwise drilling device for carbon fiber composite materials, which comprises a frame, a horizontal moving mechanism, a clamping mechanism and a drilling mechanism; the horizontal moving mechanism is arranged on the top surface of the top plate of the rack and is internally provided with a plurality of lead screws; the clamping mechanism is arranged on the lead screw in a matching way, and the lead screw rotates to drive the clamping mechanism to move horizontally; drilling mechanisms are arranged at the two ends of the rear side of the top surface of the rack top plate; drilling mechanism includes support, diaphragm, first electric putter, second electric putter, frame, rotation motor and drill bit, transversely is equipped with on the top of support the diaphragm, be equipped with the sliding hole along length direction on the diaphragm, install first electric putter on the outer end of diaphragm, it is equipped with second electric putter to slide on the sliding hole of diaphragm, and first electric putter's expansion end and second electric putter rigid coupling, installs the rotation motor in the frame of second electric putter lower extreme. The utility model discloses drilling quality is good, and is efficient.

Description

Step-by-step drilling device for carbon fiber composite material

Technical Field

The utility model relates to a carbon fiber product drilling technical field especially relates to carbon-fibre composite's substep drilling equipment.

Background

At present, carbon fiber composite materials have good application in many fields, however, when holes are drilled on the materials, the raw materials need to be limited first, and then the holes can be conveniently drilled; the existing drilling mode is mostly used for drilling at one time, when the drilling is frequently carried out at one time in actual processing, the condition of cracking and damage at the periphery of a raw material drilling hole is caused, the finished product rate of the processing is not high, the quality of the drilling hole is poor, the efficiency is low, and the production requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a substep drilling device for carbon fiber composite materials.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the step-by-step drilling device for the carbon fiber composite material comprises a rack 1, a horizontal moving mechanism, a clamping mechanism and a drilling mechanism; the rack 1 is in a table shape with four support legs at the bottom, the horizontal moving mechanism is arranged on the top surface of a top plate of the rack 1, and the horizontal moving mechanism is internally provided with a plurality of lead screws 12; the clamping mechanism is arranged on the screw rod 12 in a matching way, and the screw rod rotates to drive the clamping mechanism to move horizontally; the clamping mechanism is internally provided with a placing plate 2, the two ends of the placing plate 2 are respectively and rotatably provided with a pressing plate 22, the pressing plates 22 at the two ends are used for rotatably pressing the raw materials placed on the placing plate 2, and the middle part of the placing plate 2 is provided with a strip-shaped opening; drilling mechanisms are arranged at the two ends of the rear side of the top surface of the top plate of the rack 1;

the drilling mechanism comprises a support 3, a transverse plate, a first electric push rod 31, a second electric push rod 32, an outer frame 33, a rotating motor 34 and a drill bit, wherein the support 3 is in a plate shape which is longitudinally arranged, the transverse plate is transversely arranged at the top end of the support 3, a sliding hole is formed in the transverse plate along the length direction, the first electric push rod 31 is arranged at the outer end of the transverse plate, the second electric push rod 32 is arranged in the sliding hole at the inner end of the transverse plate in a sliding mode, the movable end of the first electric push rod 31 is fixedly connected with the second electric push rod, the movable end of the second electric push rod 32 extends out of the sliding hole downwards, the outer frame 33 is fixedly connected to the bottom of the movable end of the second electric push rod 32, the outer frame 33 is in a channel steel shape which is longitudinally arranged, the rotating motor 34 is arranged in the outer frame 33, the bottom of the rotating motor extends out of the outer frame 33 downwards, and the drill bit 35 is coaxially fixedly, the drill 35 is arranged in correspondence with said opening.

Preferably, a pair of support plates are respectively arranged at two end parts of the placing plate 2, a rotating shaft is transversely and movably arranged on each pair of support plates, the pressing plate 22 is a U-shaped plate, and one end of the pressing plate 22 is fixedly connected to the corresponding rotating shaft; the outer end of each rotating shaft is fixedly connected with a connecting rod 21, and the other end of each connecting rod 21 is provided with a kidney-shaped hole 27; an L-shaped adjusting plate is arranged in the middle of the front end of the placing plate 2, a sliding groove 24 is longitudinally arranged in the middle of the outer wall of a longitudinal plate of the adjusting plate, a sliding block 23 is arranged in the sliding groove 24, connecting columns are transversely protruded on the outer wall of the sliding block 23, and a kidney-shaped hole 27 at the other end of each connecting rod 21 fixedly connected to each rotating shaft is sleeved on each connecting column; the bottom of the sliding block 23 is longitudinally provided with an adjusting rod 25, the bottom end of the adjusting rod 25 extends downwards to form a transverse plate of the adjusting plate, a transverse rod is transversely and fixedly connected to the downward extending end of the adjusting rod 25, a threaded hole is formed in the transverse plate of the adjusting plate corresponding to the outer end of the transverse rod, an adjusting bolt is arranged in the threaded hole in a matched mode, and the bottom of the adjusting bolt is movably connected with the transverse rod.

Preferably, the top surface of the outer end part of the cross rod is downwards sunken to form an inverted T-shaped movable groove, the bottom of the adjusting bolt is transversely protruded to form a limiting ring, the limiting ring is movably positioned at the bottom in the movable groove, and the bottom screw section of the adjusting bolt is positioned at the upper part of the movable groove; the top of the adjusting bolt is provided with a rotating disc 26, the outer side of the rotating disc 26 is a ring, spokes are radially distributed in the ring, and the inner ends of the spokes are fixedly connected with the adjusting bolt.

Preferably, the bracket 3 is a tapered plate with a small top and a large bottom, and an elliptical lightening hole is formed at the bottom of the bracket 3.

Preferably, the horizontal moving mechanism includes two lead screws 12, and two ends of each lead screw 12 are respectively provided with a rotating motor 11 and a supporting plate, wherein one end of each lead screw 12 is coaxially and fixedly connected with a motor shaft of the rotating motor 11, and the other end of each lead screw 12 is movably arranged on the corresponding supporting plate; two moving blocks 13 are sleeved on each screw rod 12 in a spiral fit clearance mode, and four corners of the bottom of the placing plate 2 are fixedly connected with each moving block 13 on the two screw rods 12 respectively.

Preferably, a T-shaped groove is formed at the outer end of the pressing plate 22, a spring 222 is arranged on the inner wall of the T-shaped groove, and an i-shaped elastic plate 221 is arranged in the T-shaped groove in a matching manner, wherein a wing plate of the elastic plate 221 is located in the T-shaped groove and is fixedly connected with the spring 222; the other limb of the spring plate is located below the outer end of the hold-down plate 22.

Preferably, the diameter of a drill bit in the drilling mechanism at one end of the top plate of the machine frame 1 is 5-10mm smaller than that of the drill bit in the drilling mechanism at the other end.

The use method of the step-by-step drilling device for the carbon fiber composite material comprises the following steps of:

the method comprises the following steps: electrifying a first electric push rod 31, a second electric push rod 32, a rotating motor 34 and a rotating motor 11 in the horizontal moving mechanism which are externally connected with a power supply;

step two: placing the carbon fiber composite raw material to be drilled on the placing plate 2, and rotating the adjusting bolt to enable the outer end parts of the pressing plates on the two sides to tightly press the raw material; then the placing plate is driven to the lower part of the drilling mechanism at one side of the rack 1 through a screw rod;

step three: adjusting the position of a drill bit of the drilling mechanism at one side, and then performing pre-drilling operation downwards; then, the placing plate is moved below the drilling mechanism on the other side of the rack 1, the position of a drill bit of the drilling mechanism on the other side is adjusted, drilling operation is carried out downwards, and the pre-drilling hole diameter is smaller than the drilling hole diameter, so that distributed drilling of the carbon fiber composite raw material is realized;

step four: after the drilling operation is finished, the adjusting bolt is rotated, the pressing plates 22 on the two sides are outwards turned, and the carbon fiber composite raw material after drilling is taken out; and repeating the steps until all the carbon fiber composite material drilling operations are finished, and turning off the power supply.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the horizontal moving mechanism is arranged on the frame, and can move the carbon fiber composite raw material placed on the placing plate in the horizontal direction, thereby facilitating the drilling of the distribution of the carbon fiber raw material;

2. the utility model discloses install clamping mechanism on the frame, can carry out the clamp of convenient operation or dismantle to the raw materials, when the raw materials is in the drilling, through clamping mechanism, avoid in the drilling, the raw materials removes to influence drilling quality;

3. the frame of the utility model is provided with two drilling mechanisms, the drill bits in the two drilling mechanisms are different in size, and during operation, pre-drilling is carried out through a small-diameter drill bit; formally drill through the major diameter drill bit after to avoided the condition that traditional one shot drilling shaping leads to raw materials hole periphery to appear damaging, the utility model discloses drilling efficiency is high, of high quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic view I of a stepwise drilling device for carbon fiber composite material according to the present invention;

fig. 2 is a schematic view II of a stepwise drilling device for carbon fiber composite material according to the present invention;

fig. 3 is a front view of the stepwise drilling device for carbon fiber composite material according to the present invention;

fig. 4 is a schematic view of the connection between the horizontal moving mechanism and the frame of the stepwise drilling device for carbon fiber composite materials according to the present invention;

fig. 5 is an enlarged view of a part a in fig. 1 of the carbon fiber composite step-by-step drilling apparatus according to the present invention;

fig. 6 is a schematic view of the connection between the pressing plate and the elastic plate of the stepwise drilling device for carbon fiber composite materials according to the present invention;

number in the figure: the device comprises a frame 1, a rotating motor 11, a lead screw 12, a moving block 13, a placing plate 2, a connecting rod 21, a pressing plate 22, an elastic plate 221, a spring 222, a sliding block 23, a sliding groove 24, an adjusting rod 25, a rotating disc 26, a waist-shaped hole 27, a bracket 3, a first electric push rod 31, a second electric push rod 32, an outer frame 33, a rotating motor 34 and a drill 35.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example (b): referring to fig. 1-6, the stepwise drilling device for carbon fiber composite material comprises a frame 1, a horizontal moving mechanism, a clamping mechanism and a drilling mechanism; the rack 1 is in a table shape with four support legs at the bottom, the horizontal moving mechanism is arranged on the top surface of a top plate of the rack 1, and the horizontal moving mechanism is internally provided with a plurality of lead screws 12; the clamping mechanism is arranged on the screw rod 12 in a matching way, and the screw rod rotates to drive the clamping mechanism to move horizontally; the clamping mechanism is internally provided with a placing plate 2, the two ends of the placing plate 2 are respectively and rotatably provided with a pressing plate 22, the pressing plates 22 at the two ends are used for rotatably pressing the raw materials placed on the placing plate 2, and the middle part of the placing plate 2 is provided with a strip-shaped opening; drilling mechanisms are arranged at the two ends of the rear side of the top surface of the top plate of the rack 1;

the drilling mechanism comprises a support 3, a transverse plate, a first electric push rod 31, a second electric push rod 32, an outer frame 33, a rotating motor 34 and a drill bit, wherein the support 3 is in a longitudinally-arranged tapered plate shape with a small upper part and a large lower part, and an oval lightening hole is formed in the bottom of the support 3; the top end of the bracket 3 is transversely provided with the transverse plate, the transverse plate is provided with a sliding hole along the length direction, the outer end of the transverse plate is provided with the first electric push rod 31, the sliding hole at the inner end of the transverse plate is provided with an L-shaped movable frame in a sliding way, the second electric push rod 32 is arranged on the movable frame, the movable end of the first electric push rod 31 is fixedly connected with the longitudinal plate end of the movable frame at the bottom of the second electric push rod 32, the bottom surface of the movable frame is provided with a square block in a protruding way, and the square block is positioned in the sliding hole in a sliding fit way; the movable end of the second electric push rod 32 extends downwards to form a sliding hole, the outer frame 33 is fixedly connected to the bottom of the movable end of the second electric push rod 32, the outer frame 33 is in a channel steel shape which is longitudinally arranged, the rotating motor 34 is installed in the outer frame 33, the bottom of the rotating motor extends downwards to form the outer frame 33, a drill bit 35 is coaxially and fixedly connected to the bottom end of a motor shaft of the rotating motor, and the drill bit 35 is arranged corresponding to the opening; when drilling down, the bottom end of the drill bit is located in the corresponding opening.

In order to realize the turning of the pressing plate 22, the pressing positioning and the convenient taking out of the carbon fiber composite material needing drilling, in the utility model, a pair of support plates are respectively arranged on the two end parts of the placing plate 2, a rotating shaft is transversely and movably arranged on each pair of support plates, the pressing plate 22 is a U-shaped plate, wherein one end of the pressing plate 22 is fixedly connected on the corresponding rotating shaft; the outer end of each rotating shaft is fixedly connected with a connecting rod 21, and the other end of each connecting rod 21 is provided with a kidney-shaped hole 27; an L-shaped adjusting plate is arranged in the middle of the front end of the placing plate 2, a sliding groove 24 is longitudinally arranged in the middle of the outer wall of a longitudinal plate of the adjusting plate, a sliding block 23 is arranged in the sliding groove 24, connecting columns are transversely protruded on the outer wall of the sliding block 23, and a kidney-shaped hole 27 at the other end of each connecting rod 21 fixedly connected to each rotating shaft is sleeved on each connecting column; the bottom of the sliding block 23 is longitudinally provided with an adjusting rod 25, the bottom end of the adjusting rod 25 extends downwards to form a transverse plate of the adjusting plate, a transverse rod is transversely and fixedly connected to the downward extending end of the adjusting rod 25, a threaded hole is formed in the transverse plate of the adjusting plate corresponding to the outer end of the transverse rod, an adjusting bolt is arranged in the threaded hole in a matched mode, and the bottom of the adjusting bolt is movably connected with the transverse rod.

In order to realize the adjustment of the up-and-down movement of the sliding rod 23 and the up-and-down movement of one end of the connecting rod 21 and the rotation of the rotating shaft, the top surface of the outer end part of the cross rod is downwards sunken with an inverted T-shaped movable groove, the bottom of the adjusting bolt is transversely protruded with a limiting ring, the limiting ring is movably positioned at the bottom in the movable groove, and the bottom screw section of the adjusting bolt is positioned at the upper part of the movable groove; a rotating disc 26 is arranged at the top of the adjusting bolt, a circular ring is arranged outside the rotating disc 26, spokes are radially distributed in the circular ring, and the inner ends of the spokes are fixedly connected with the adjusting bolt; the rotating disc 26 is rotated, so that the adjusting bolt is moved up and down, the sliding block fixedly connected to the adjusting rod is driven to move up and down, and the pressing plate 22 is turned over;

in the utility model, the horizontal moving mechanism contains two lead screws 12, and two ends of each lead screw 12 are respectively provided with a rotating motor 11 and a supporting plate, wherein one end of each lead screw 12 is coaxially and fixedly connected with a motor shaft of the rotating motor 11, and the other end of each lead screw 12 is movably arranged on the corresponding supporting plate; two moving blocks 13 are sleeved on each screw rod 12 in a spiral fit clearance mode, and four corners of the bottom of the placing plate 2 are fixedly connected with each moving block 13 on the two screw rods 12 respectively; the screw rod is driven to rotate through the rotating motor, so that the moving block can horizontally move on the screw rod, the placing plate is driven to horizontally move, and the raw materials on the placing plate can be conveniently subjected to distributed drilling operation;

in order to realize the elastic compression of the carbon fiber composite raw material and avoid the damage of the raw material due to rigid compression, in the utility model, a T-shaped groove is arranged at the outer end part of the compression plate 22, a spring 222 is arranged on the inner wall of the T-shaped groove, and an I-shaped elastic plate 221 is arranged in the T-shaped groove in a matching way, wherein, a wing plate of the elastic plate 221 is positioned in the T-shaped groove and is fixedly connected with the spring 222; the other wing plate of the elastic plate is positioned below the outer end part of the pressing plate 22; one end of the elastic plate 221 can move freely in the T-shaped groove, and limit is realized, so that the raw material can be buffered and compressed.

In order to avoid the situation that the hole is damaged by the traditional one-time raw material drilling processing, the utility model adopts distributed drilling, and the diameter of a drill bit in a drilling mechanism at one end of the top plate of the frame 1 is 5-10mm smaller than that of a drill bit in a drilling mechanism at the other end; when drilling, the drill bit with the small diameter is used for drilling, and then the drill bit with the large diameter is horizontally moved to drill, so that the carbon fiber composite material can be well drilled.

The utility model discloses a carbon-fibre composite's substep drilling equipment when specifically using, application method as follows specifically includes following step:

the method comprises the following steps: electrifying a first electric push rod 31, a second electric push rod 32, a rotating motor 34 and a rotating motor 11 in the horizontal moving mechanism which are externally connected with a power supply;

step two: placing the carbon fiber composite raw material to be drilled on the placing plate 2, and rotating the adjusting bolt to enable the outer end parts of the pressing plates on the two sides to tightly press the raw material; then the placing plate is driven to the lower part of the drilling mechanism at one side of the rack 1 through a screw rod;

step three: adjusting the position of a drill bit of the drilling mechanism on one side, and then performing pre-drilling operation downwards, and drilling a pre-processing hole with a small aperture on the carbon fiber composite raw material; then, the placing plate is moved below the drilling mechanism on the other side of the rack 1, the position of a drill bit of the drilling mechanism on the other side is adjusted, and then drilling operation is performed downwards, so that formal drilling of the raw materials is completed, and distributed drilling of the carbon fiber composite raw materials is realized;

step four: after the drilling operation is finished, the adjusting bolt is rotated, the pressing plates 22 on the two sides are outwards turned, and the carbon fiber composite raw material after drilling is taken out; and repeating the steps until all the carbon fiber composite material drilling operations are finished, and turning off the power supply.

To sum up, the horizontal moving mechanism is arranged on the frame, and can move the carbon fiber composite raw material placed on the placing plate in the horizontal direction, so that the carbon fiber raw material can be conveniently drilled in a distributed manner; the utility model discloses install clamping mechanism on the frame, can carry out the clamp of convenient operation or dismantle to the raw materials, when the raw materials is in the drilling, through clamping mechanism, avoid in the drilling, the raw materials removes to influence drilling quality; the frame of the utility model is provided with two drilling mechanisms, the drill bits in the two drilling mechanisms are different in size, and during operation, pre-drilling is carried out through a small-diameter drill bit; formally drill through the major diameter drill bit after to avoided the condition that traditional one shot drilling shaping leads to raw materials hole periphery to appear damaging, the utility model discloses drilling efficiency is high, of high quality.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. Step-by-step drilling device for carbon fiber composite material, which is characterized in that: comprises a frame (1), a horizontal moving mechanism, a clamping mechanism and a drilling mechanism; the rack (1) is in a table shape with four support legs at the bottom, the horizontal moving mechanism is arranged on the top surface of a top plate of the rack (1), and the horizontal moving mechanism is internally provided with a plurality of lead screws (12); the clamping mechanism is arranged on a lead screw (12) in a matching way, and the lead screw rotates to drive the clamping mechanism to move horizontally; the clamping mechanism is internally provided with a placing plate (2), the two ends of the placing plate (2) are respectively and rotatably provided with a pressing plate (22), the pressing plates (22) at the two ends are used for rotatably pressing raw materials placed on the placing plate (2), and the middle part of the placing plate (2) is provided with a strip-shaped opening; drilling mechanisms are arranged at the two ends of the rear side of the top surface of the top plate of the rack (1);

the drilling mechanism comprises a support (3), a transverse plate, a first electric push rod (31), a second electric push rod (32), an outer frame (33), a rotating motor (34) and a drill bit, wherein the support (3) is a plate which is vertically arranged, the transverse plate is transversely arranged at the top end of the support (3), sliding holes are formed in the transverse plate along the length direction, the first electric push rod (31) is arranged at the outer end of the transverse plate, the second electric push rod (32) is arranged on the sliding holes in the inner end of the transverse plate in a sliding mode, the movable end of the first electric push rod (31) is fixedly connected with the second electric push rod, the movable end of the second electric push rod (32) downwards extends out of the sliding holes, the outer frame (33) is fixedly connected to the bottom of the movable end of the second electric push rod (32), the outer frame (33) is in a longitudinally arranged channel steel shape, the rotating motor (34) is arranged in the outer frame (33), the bottom of the rotating motor extends out of the outer frame (33) downwards, a drill bit (35) is coaxially and fixedly connected to the bottom end of a motor shaft of the rotating motor, and the drill bit (35) corresponds to the opening.

2. The step-drilling apparatus for carbon fiber composite material as claimed in claim 1, wherein: a pair of support plates are arranged at two end parts of the placing plate (2), a rotating shaft is transversely and movably arranged on each pair of support plates, the pressing plate (22) is a U-shaped plate, and one end of the pressing plate (22) is fixedly connected to the corresponding rotating shaft; the outer end of each rotating shaft is fixedly connected with a connecting rod (21), and the other end of each connecting rod (21) is provided with a kidney-shaped hole (27); an L-shaped adjusting plate is arranged in the middle of the front end of the placing plate (2), a sliding groove (24) is longitudinally arranged in the middle of the outer wall of a longitudinal plate of the adjusting plate, a sliding block (23) is arranged in the sliding groove (24), connecting columns are transversely protruded on the outer wall of the sliding block (23), and a kidney-shaped hole (27) at the other end of each connecting rod (21) fixedly connected to each rotating shaft is sleeved on each connecting column; the bottom of slider (23) vertically is equipped with adjusts pole (25), and the bottom of adjusting pole (25) stretches out downwards the diaphragm of regulating plate, the horizontal rigid coupling has the horizontal pole on the lower tip that stretches out of adjusting pole (25), is equipped with the screw hole on the diaphragm of the regulating plate that the outer tip of horizontal pole corresponds, and is equipped with adjusting bolt in the screw hole cooperation, adjusting bolt's bottom with horizontal pole swing joint.

3. The step-drilling apparatus for carbon fiber composite material as claimed in claim 2, wherein: an inverted T-shaped movable groove is recessed downwards on the top surface of the outer end part of the cross rod, a limiting ring is transversely protruded at the bottom of the adjusting bolt, the limiting ring is movably positioned at the bottom in the movable groove, and a bottom screw section of the adjusting bolt is positioned at the upper part of the movable groove; the top of the adjusting bolt is provided with a rotating disc (26), the outer side of the rotating disc (26) is provided with a circular ring, spokes are radially distributed in the circular ring, and the inner ends of the spokes are fixedly connected with the adjusting bolt.

4. The step-drilling apparatus for carbon fiber composite material as claimed in claim 2 or 3, wherein: the support (3) is a conical plate with a small upper part and a large lower part, and an elliptical lightening hole is formed in the bottom of the support (3).

5. The step-drilling apparatus for carbon fiber composite material as claimed in claim 2 or 3, wherein: the horizontal moving mechanism is internally provided with two lead screws (12), two ends of each lead screw (12) are respectively provided with a rotating motor (11) and a supporting plate, wherein one end of each lead screw (12) is coaxially and fixedly connected with a motor shaft of the rotating motor (11), and the other end of each lead screw (12) is movably arranged on the corresponding supporting plate; two moving blocks (13) are sleeved on each lead screw (12) in a spiral fit clearance mode, and four corners of the bottom of the placing plate (2) are fixedly connected with the moving blocks (13) on the two lead screws (12) respectively.

6. The step-drilling apparatus for carbon fiber composite material as claimed in claim 2 or 3, wherein: a T-shaped groove is formed in the outer end portion of the pressing plate (22), a spring (222) is arranged on the inner wall of the T-shaped groove, an I-shaped elastic plate (221) is arranged in the T-shaped groove in a matched mode, and one wing plate of the elastic plate (221) is located in the T-shaped groove and fixedly connected with the spring (222); the other wing of the elastic plate is positioned below the outer end of the pressing plate (22).

7. The step-drilling apparatus for carbon fiber composite material as claimed in claim 2 or 3, wherein: the diameter of a drill bit in the drilling mechanism at one end of the top plate of the rack (1) is 5-10mm smaller than that of a drill bit in the drilling mechanism at the other end.

Images