Numerical control deep hole drilling equipment

Abstract

The utility model relates to the technical field of drilling equipment, and provides numerical control deep hole drilling equipment. The chuck is connected with an output shaft of the spindle box; the sliding seat is slidably arranged on the base; the drill rod is arranged on the sliding seat, and a chip removal channel is formed in the drill rod; the drill bit is arranged on the drill rod, a chip removal oil return channel is arranged on the side wall of the drill bit, and the chip removal oil return channel is communicated with a chip removal channel on the drill rod; the outer blade is arranged on the drill bit, and the outer side wall of the outer blade protrudes out of the outer side of the drill rod; the cooling oil box is arranged on the periphery of the drill rod, a cooling oil outflow channel is reserved between the inner wall of the end, close to the drill bit, of the cooling oil box and the drill rod, a workpiece is clamped between the chuck and the cooling oil box, and the diameter of the workpiece is larger than the outer diameter of the cooling oil outflow channel. The oil scrap collecting box is located on one side of the base, and the end, away from the drill bit, of the scrap discharging channel in the drill rod communicates with the oil scrap collecting box. According to the technical scheme, the problem that cuttings are not easy to discharge in the drilling process in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling equipment technical field, specifically, and relates to a numerical control deep hole drilling equipment. BACKGROUND

[0002] The deep hole drilling equipment is a kind of equipment for processing deep hole, when deep hole drilling equipment processes deep hole, drill bit carries out cutting to workpiece and produces chip, since the hole processed is deep, so that cutting chip is not easy to discharge in the drilling process, chip is accumulated in the drilling, can increase cutting force, is prone to cause drill bit breakage, also can affect drilling quality. UTILITY MODEL CONTENTS

[0003] The utility model provides a numerical control deep hole drilling equipment, solve the problem that cutting chip is not easy to discharge in the drilling process in relevant technology.

[0004] The technical scheme of the utility model is as follows: a numerical control deep hole drilling equipment, the key is that it includes,

[0005] Base,

[0006] Spindle box, the spindle box is arranged at one end of the base;

[0007] Chuck, the chuck is connected with the output shaft of the spindle box, and is used for clamping one end of workpiece;

[0008] Slide, the slide is slidably arranged on the base, and the chuck is located between the spindle box and the slide;

[0009] Drill rod, the drill rod is arranged on the slide, and the drill rod has a chip removal channel;

[0010] Drill bit, the drill bit is arranged on the drill rod, and is located at one end of the drill rod close to the chuck, the end face of the drill bit has a chip removal and oil return channel, and the chip removal and oil return channel is communicated with the chip removal channel on the drill rod;

[0011] Outer blade, the outer blade is arranged on the drill bit, and the outer side wall of the outer blade protrudes outside the drill rod;

[0012] Cooling oil box, the cooling oil box is arranged on the periphery of the drill rod, and the inner wall of the cooling oil box close to one end of the drill bit and the drill rod are left with a cooling oil outflow channel, the workpiece is used for clamping between the chuck and the cooling oil box, and the diameter of the workpiece is greater than the outer diameter of the cooling oil outflow channel;

[0013] Oil chip collection box, the oil chip collection box is located on one side of the base, and the chip removal channel on the drill rod is communicated with the oil chip collection box away from one end of the drill bit.

[0014] The sealing disc is arranged on the cooling oil box and located at the periphery of the cooling oil outflow channel, is sleeved on the periphery of the drill rod, and has an oil passing channel between the sealing disc and the drill rod.

[0015] The oil chip guide pipe is arranged on the drill rod, and the chip discharging channel on the drill rod is communicated with the oil chip collecting box through the oil chip guide pipe.

[0016] The bottom of the oil chip collecting box is provided with an oil discharging port, and further comprises,

[0017] The cooling oil recovery tank is located on one side of the base, and the oil chip collecting box is arranged on the cooling oil recovery tank.

[0018] The filter screen is arranged in the oil chip collecting box, and divides the oil chip collecting box into an upper liquid inlet cavity and a lower filter cavity, the chip discharging channel on the drill rod is communicated with the upper liquid inlet cavity of the oil chip collecting box, the upper end of the oil discharging port is communicated with the lower filter cavity of the oil chip collecting box, and the lower end of the oil discharging port is communicated with the cooling oil recovery tank.

[0019] Further comprising,

[0020] The oil tank is located on one side of the base, and the oil discharging port of the cooling oil recovery tank is communicated with the inside of the oil tank.

[0021] The conveying pump is communicated with the inside of the oil tank at one end, and is communicated with the inside of the cooling oil box at the other end.

[0022] Further comprising a workpiece support frame, which is arranged on the base and located between the chuck and the cooling oil box.

[0023] Further comprising a drill rod guide sleeve, which is arranged on the base and located between the sliding seat and the cooling oil box.

[0024] Further comprising,

[0025] The screw rod is rotatably arranged on the base and located below the sliding seat.

[0026] The nut seat is threadedly connected with the screw rod, and the sliding seat is arranged on the nut seat.

[0027] Further comprising a center blade, which is arranged on the drill bit and located at the center of the end of the drill bit away from the drill rod.

[0028] Also included is an intermediate blade disposed on the drill bit and positioned between the center blade and the outer blade.

[0029] The working principle and beneficial effects of the utility model are as follows: the main shaft box is arranged at one end of the base; the chuck is connected with the output shaft of the main shaft box and is used for clamping one end of the workpiece; the sliding seat is slidably arranged on the base and the chuck is located between the main shaft box and the sliding seat; the drill rod is arranged on the sliding seat and has a chip removal channel; the drill bit is arranged on the drill rod and is located at one end of the drill rod close to the chuck, the drill bit has a chip removal and oil return channel on the end face, the chip removal and oil return channel is communicated with the chip removal channel on the drill rod; the outer blade is arranged on the drill bit and the outer side wall of the outer blade protrudes outside the drill rod; the cooling oil box is arranged around the drill rod, the inner wall of the cooling oil box close to the one end of the drill bit leaves a cooling oil outflow channel between the cooling oil box and the drill rod, the workpiece is clamped between the chuck and the cooling oil box, the diameter of the workpiece is greater than the outer diameter of the cooling oil outflow channel; the oil chip collecting box is located at one side of the base, the chip removal channel on the drill rod far away from the drill bit is communicated with the oil chip collecting box.

[0030] The main shaft box serves as a power source and drives the output shaft to rotate, the chuck connected with the output shaft rotates, and then drives the workpiece clamped by the chuck to rotate. The sliding seat drives the drill rod to move towards the chuck, so that the drill bit and the outer blade are close to and contact the rotating workpiece, the workpiece is cut by the drill bit and the outer blade, and thus the drilling operation is realized. During the cutting process, the cooling oil in the cooling oil box flows out through the cooling oil outflow channel between the cooling oil box and the drill rod, enters between the drill rod and the workpiece, and then enters between the drill bit and the workpiece, together with the chips generated in the cutting process, enters the chip removal channel on the drill rod through the chip removal and oil return channel on the side wall of the drill bit, and then moves along the chip removal channel and is finally transported into the oil chip collecting box. The chips generated in the cutting of the deep hole can be smoothly discharged during the flow of the cooling oil, the chips can be prevented from accumulating in the drill hole, the cutting force can be reduced, the probability of breaking of the drill bit can be reduced, and the drilling quality can be improved. The cooling oil can also cool the drill bit and the workpiece, take away the heat generated in the cutting process, prevent the performance of the drill bit and the workpiece from changing due to the high temperature, and also has a lubricating effect, reduces the friction between the drill bit and the workpiece, makes the cutting process more smooth, is beneficial to prolonging the service life of the drill bit and improving the drilling quality. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above-mentioned characteristics, technical features, advantages and implementation modes of the utility model will be further described in the following preferred embodiments combined with the drawings.

[0032] Figure 1 It is the front view of the utility model.

[0033] Figure 2 It is the connection structure schematic view of the cooling oil box and the drill rod in the utility model.

[0034] Figure 3 is a top view of the utility model.

[0035] Figure 4 is a schematic view of the connecting structure of the drill rod and the screw rod in the utility model.

[0036] Figure 5 is a schematic view of the connecting structure of the blade and the drill bit in the utility model.

[0037] In the figure: 1, base, 2, main shaft box, 3, chuck, 4, slide, 5, drill rod, 6, drill bit, 7, outer blade, 8, cooling oil box, 9, oil chip collection box, 10, chip removal and oil return channel, 11, cooling oil outflow channel, 12, sealing disc, 13, oil passage, 14, oil chip guide pipe, 15, oil discharge port, 16, cooling oil recovery tank, 17, filter screen, 18, oil tank, 19, delivery pump, 20, workpiece support frame, 21, drill rod guide sleeve, 22, screw rod, 23, nut seat, 24, center blade, 25, intermediate blade, 26, workpiece, 27, rotary drive mechanism. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, specific implementation manners of the utility model will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the utility model, and other drawings and other implementation manners can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0039] In order to make the drawing simple, only the parts related to the utility model are schematically shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] Embodiment, refer to Figures 1-3 As an embodiment of the utility model, a numerical control deep hole drilling equipment is provided, including base 1, main shaft box 2, chuck 3, sliding seat 4, drill rod 5, drill bit 6, outer blade 7, cooling oil box 8, oil chip collection box 9, main shaft box 2 sets up at one end of base 1;Chuck 3 is connected with the output shaft of main shaft box 2, is used for clamping the one end of workpiece 26;Sliding seat 4 is slidably arranged on base 1, and chuck 3 is located between main shaft box 2 and sliding seat 4;Drill rod 5 is arranged on sliding seat 4, and drill rod 5 has a chip removal channel;Drill bit 6 is arranged on drill rod 5, and is located at the one end of drill rod 5 close to chuck 3, and drill bit 6 has a chip removal and oil return channel 10 on the end face, and the chip removal and oil return channel 10 is communicated with the chip removal channel on drill rod 5;Outer blade 7 is arranged on drill bit 6, and the outer side wall of outer blade 7 protrudes outside drill rod 5;Cooling oil box 8 is arranged on the periphery of drill rod 5, and the inner wall of cooling oil box 8 close to the one end of drill bit 6 and drill rod 5 leaves cooling oil outflow channel 11, workpiece 26 is used for clamping between chuck 3 and cooling oil box 8, and the diameter of workpiece 26 is greater than the outer diameter of cooling oil outflow channel 11;Oil chip collection box 9 is located at one side of base 1, and the one end of chip removal channel on drill rod 5 away from drill bit 6 is communicated with oil chip collection box 9.

[0043] In the embodiment, main shaft box 2 is used as a power source, drives its output shaft to rotate, chuck 3 connected with the output shaft rotates, and then drives workpiece 26 clamped by chuck 3 to rotate. Sliding seat 4 drives drill rod 5 to move towards chuck 3, so that drill bit 6 and outer blade 7 are close to and contact with rotating workpiece 26, and workpiece 26 is cut by drill bit 6 and outer blade 7, so that drilling operation is realized. During cutting, the cooling oil in cooling oil box 8 flows out through cooling oil outflow channel 11 between cooling oil box 8 and drill rod 5, enters between drill rod 5 and workpiece 26, and then reaches between drill bit 6 and workpiece 26, together with the chips generated during cutting, enters the chip removal channel on drill rod 5 through chip removal and oil return channel 10 on the side wall of drill bit 6, and then moves along the chip removal channel, and finally is transported into oil chip collection box 9. The chips generated during cutting in the deep hole can be smoothly discharged during the flow of the cooling oil, the chips can be prevented from accumulating in the drill hole, the cutting force can be reduced, the probability of drill bit 6 breaking can be reduced, and the drilling quality can be improved. The cooling oil can also cool drill bit 6 and workpiece 26, remove the heat generated during cutting, prevent performance changes of drill bit 6 and workpiece 26 due to high temperature, and also play a lubricating role, reduce the friction between drill bit 6 and workpiece 26, make the cutting process more smooth, prolong the service life of drill bit 6, and improve the drilling quality.

[0044] The utility model discloses can utilize the idle C6132 ordinary lathe reformation, utilize all components, through the limited reformation of ordinary lathe, make deep hole machining no longer need expensive professional equipment and can complete, can save processing cost, can also avoid the waste of resources. The equipment is suitable for batch shaft deep hole machining, can reduce the labor intensity of operator, improves work efficiency. One drilling can replace the machining precision and surface roughness that general need drilling, expanding process reaches, can drill the through -hole or blind hole of 25 ~ 80mm between diameter, in the deep hole machining of the tolerance and surface roughness requirement being relatively strict, can guarantee the size precision, position precision and straightness of hole. Can solve the problem of high cost, low efficiency of processing deep hole.

[0045] Further, as shown in Figure 1 , Figure 2 and Figure 3 , further comprising a sealing disc 12, the sealing disc 12 is arranged on the cooling oil box 8 and located at the periphery of the cooling oil outlet channel 11, the sealing disc 12 is sleeved on the periphery of the drill rod 5, the sealing disc 12 and the drill rod 5 are left with an oil passing channel 13, and the end of the workpiece 26 away from the chuck 3 is used for clamping sealing with the sealing disc 12. During cutting, the workpiece 26 is clamped between the chuck 3 and the sealing disc 12, the cooling oil in the cooling oil box 8 flows out through the cooling oil outlet channel 11 between the cooling oil box 8 and the drill rod 5, and then passes through the oil passing channel 13 between the sealing disc 12 and the drill rod 5, and then enters between the drill rod 5 and the workpiece 26. The workpiece 26 directly contacts the sealing disc 12 during rotation, instead of contacting the cooling oil box 8, which can avoid wear of the cooling oil box 8 during rotation of the workpiece 26 and prolong the service life of the cooling oil box 8. The sealing disc 12 and the cooling oil box 8 are detachably connected, facilitating disassembly and replacement of the sealing disc 12.

[0046] Further, as shown in Figure 3 , further comprising an oil chip guide pipe 14, the inlet end of the oil chip guide pipe 14 is arranged on the drill rod 5, and the chip removal channel on the drill rod 5 is connected with the oil chip collecting box 9 through the oil chip guide pipe 14. As long as the oil chip guide pipe 14 has a sufficient length, during cutting, even if the cooling oil box 8 moves with the drill rod 5, the cooling oil and chips entering the chip removal channel of the drill rod 5 can also be guided by the oil chip guide pipe 14 and smoothly flow to the oil chip collecting box 9, which can avoid the difficulty in chip removal caused by poor connection between the chip removal channel and the oil chip collecting box 9, improve the chip removal efficiency, further reduce the risk of chip accumulation in the drill hole, thereby reducing the cutting force and the probability of breaking of the drill bit 6, and improving the drill hole quality. The oil chip guide pipe 14 is arranged on the sliding seat 4, and the sliding seat 4 can support the oil chip guide pipe 14, reducing the requirement for the connection strength between the drill rod 5 and the oil chip guide pipe 14.

[0047] Further, as shown inFigure 3 As shown, the bottom of the oil debris collection box 9 has an oil outlet 15, and further comprises a cooling oil recovery tank 16, a filter screen 17, the cooling oil recovery tank 16 is located on one side of the base 1, and the oil debris collection box 9 is arranged on the cooling oil recovery tank 16; the filter screen 17 is arranged in the oil debris collection box 9, and the oil debris collection box 9 is divided into an upper liquid inlet cavity and a lower filter cavity, the debris discharge channel on the drill rod 5 is communicated with the upper liquid inlet cavity of the oil debris collection box 9, the upper end of the oil outlet 15 is communicated with the lower filter cavity of the oil debris collection box 9, and the lower end of the oil outlet 15 is communicated with the cooling oil recovery tank 16.

[0048] The cooling oil with debris enters the upper liquid inlet cavity of the oil debris collection box 9 from the debris discharge channel of the drill rod 5, and then the cooling oil and the debris flow downward under the action of gravity, when passing through the filter screen 17, the debris is intercepted by the filter screen 17 and remains in the upper liquid inlet cavity, and the cooling oil passes through the filter screen 17 and enters the lower filter cavity, and finally flows into the cooling oil recovery tank 16 from the oil outlet 15 at the bottom of the oil debris collection box 9. The oil outlet of the cooling oil recovery tank 16 is communicated with the inside of the oil tank 18, and a recycling system of the cooling oil is formed. Through the filtering effect of the filter screen 17, the cooling oil and the debris can be effectively separated, the cooling oil can be recycled and reused, and the adverse effects of impurities on the machining process can be reduced. At the same time, recycling the cooling oil can reduce the processing cost and improve the resource utilization rate.

[0049] Further, as shown in Figure 3 , the device further comprises an oil tank 18 and a delivery pump 19, the oil tank 18 is located on one side of the base 1, and the oil outlet of the cooling oil recovery tank 16 is communicated with the inside of the oil tank 18; one end of the delivery pump 19 is communicated with the inside of the oil tank 18, and the other end of the delivery pump 19 is communicated with the inside of the cooling oil box 8. The delivery pump 19 delivers the cooling oil in the oil tank 18 to the cooling oil box 8, so as to provide continuous cooling oil supply for the machining process. The recycled and separated cooling oil directly flows back to the oil tank 18 for reuse, so that the cooling oil can be recycled, the utilization rate of the cooling oil is improved, and the cost is reduced. At the same time, the stability of the cooling oil supply can be ensured, which is conducive to improving the machining quality and efficiency.

[0050] Further, as shown in Figure 1 and Figure 3 , the device further comprises a workpiece support frame 20, the workpiece support frame 20 is arranged on the base 1 and located between the chuck 3 and the cooling oil box 8. In the machining process, the workpiece support frame 20 can assist in supporting the workpiece 26, share the weight of the workpiece 26, reduce the deformation and instability caused by the workpiece 26 being too long or too heavy, improve the stability of the workpiece 26 in the machining process, reduce the machining error caused by the workpiece 26 shaking or deforming, and better ensure the accuracy and quality of the drilling. At the same time, it is helpful to prolong the service life of the chuck 3 and reduce the equipment maintenance cost.

[0051] Further, as shown in Figure 1、 Figure 3 and Figure 4 As shown in

[0052] Further, as shown in Figure 1 、 Figure 3 and Figure 4 Further, a lead screw 22 and a nut seat 23 are further included, the lead screw 22 is rotatably arranged on the base 1 and located below the sliding seat 4, the nut seat 23 is threadedly connected with the lead screw 22, and the sliding seat 4 is arranged on the nut seat 23. By rotating the lead screw 22, the nut seat 23 moves on the lead screw 22, thereby driving the sliding seat 4 and the drill rod 5 to move axially. This feeding control mode can accurately adjust the feeding speed and position of the drill rod 5 according to the machining requirements, and better ensure the stability and controllability of the drilling process, and improve the machining precision and quality. At the same time, the transmission mode of the lead screw 22 and the nut seat 23 has high transmission efficiency and precision, which can reduce energy loss and error. A rotary drive mechanism 27 is arranged on the base 1, an output shaft of the rotary drive mechanism 27 is connected with one end of the lead screw 22, the rotary drive mechanism 27 is used to drive the lead screw 22 to rotate, and the operation is mechanized, which is more time-saving and labor-saving. The rotary drive mechanism 27 is preferably a servo motor.

[0053] Further, as shown in Figure 5 Further, a center blade 24 is further included, the center blade 24 is arranged on the drill bit 6 and located at the center of the end of the drill bit 6 away from the drill rod 5. In the drilling process, the center blade 24 first contacts the workpiece 26 to perform center positioning and preliminary cutting, which can improve the positioning accuracy of drilling and ensure that the drill bit 6 can accurately align the center of the workpiece 26.

[0054] Further, as shown in Figure 5 Further, an intermediate blade 25 is further included, the intermediate blade 25 is arranged on the drill bit 6 and located between the center blade 24 and the outer blade 7. In the drilling process, the center blade 24 first contacts the workpiece 26 to perform center positioning and preliminary cutting, and the intermediate blade 25 and the outer blade 7 subsequently perform further cutting, which together completes the drilling operation, and can improve the cutting efficiency and drilling quality. The center blade 24, the intermediate blade 25 and the outer blade 7 are staggered and arranged, which is beneficial to chip division.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A numerically controlled deep hole drilling apparatus, characterized by: Comprising, a base (1), a spindle box (2) arranged at one end of the base (1); a chuck (3) connected with an output shaft of the spindle box (2) for clamping one end of a workpiece (26); a slide (4) slidingly arranged on the base (1), the chuck (3) being located between the spindle box (2) and the slide (4); a drill rod (5) arranged on the slide (4), the drill rod (5) having a chip removal channel; a drill bit (6) arranged on the drill rod (5) and located at one end of the drill rod (5) close to the chuck (3), the drill bit (6) having a chip removal and oil return channel (10) on its end face, the chip removal and oil return channel (10) being in communication with the chip removal channel on the drill rod (5); an outer blade (7) arranged on the drill bit (6), the outer blade (7) having an outer side wall protruding outside the drill rod (5); a cooling oil box (8) arranged around the drill rod (5), an inner wall of the cooling oil box (8) close to one end of the drill bit (6) leaving a cooling oil outflow channel (11) between the cooling oil box (8) and the drill rod (5), the workpiece (26) being clamped between the chuck (3) and the cooling oil box (8), the diameter of the workpiece (26) being greater than the outer diameter of the cooling oil outflow channel (11); an oil and chip collecting box (9) located at one side of the base (1), the chip removal channel on the drill rod (5) being in communication with the oil and chip collecting box (9) at an end away from the drill bit (6).

2. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Further comprising a sealing disc (12) arranged on the cooling oil box (8) and located around the cooling oil outflow channel (11), the sealing disc (12) being sleeved around the drill rod (5), an oil passing channel (13) being left between the sealing disc (12) and the drill rod (5), one end of the workpiece (26) away from the chuck (3) being used for clamping and sealing with the sealing disc (12).

3. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Further comprising an oil and chip guide pipe (14), an inlet end of the oil and chip guide pipe (14) being arranged on the drill rod (5), the chip removal channel on the drill rod (5) being in communication with the oil and chip collecting box (9) through the oil and chip guide pipe (14).

4. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: The bottom of the oil and chip collecting box (9) has a oil outlet (15), further comprising, a cooling oil recovery pool (16) located at one side of the base (1), the oil and chip collecting box (9) being arranged on the cooling oil recovery pool (16); a filter screen (17) arranged in the oil and chip collecting box (9), dividing the oil and chip collecting box (9) into an upper liquid inlet cavity and a lower filtering cavity, the chip removal channel on the drill rod (5) being in communication with the upper liquid inlet cavity of the oil and chip collecting box (9), the upper end of the oil outlet (15) being in communication with the lower filtering cavity of the oil and chip collecting box (9), and the lower end of the oil outlet (15) being in communication with the cooling oil recovery pool (16).

5. A numerically controlled deep hole drilling apparatus according to claim 4, wherein: Also comprising, an oil tank (18) located on one side of the base (1), the oil outlet of the cooling oil recovery tank (16) being in communication with the inside of the oil tank (18); a delivery pump (19) having one end in communication with the inside of the oil tank (18) and the other end in communication with the inside of the cooling oil tank (8).

6. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Also comprising a workpiece support frame (20) arranged on the base (1) and located between the chuck (3) and the cooling oil tank (8).

7. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Also comprising a drill rod guide sleeve (21) arranged on the base (1) and located between the sliding seat (4) and the cooling oil tank (8).

8. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Also comprising, a lead screw (22) rotatably arranged on the base (1) and located below the sliding seat (4); a nut seat (23) threadedly connected with the lead screw (22), the sliding seat (4) being arranged on the nut seat (23).

9. The numerically controlled deep hole drilling apparatus according to claim 1, wherein: Also comprising a center blade (24) arranged on the drill bit (6) and located at the center of the end of the drill bit (6) away from the drill rod (5).

10. A numerically controlled deep hole drilling apparatus according to claim 9, wherein: Also comprising an intermediate blade (25) arranged on the drill bit (6) and located between the center blade (24) and the outer blade (7).

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