CN113145889B

CN113145889B - Numerical control drilling machine

Info

Publication number: CN113145889B
Application number: CN202110467050.0A
Authority: CN
Inventors: 杨军
Original assignee: Linxi Dongfang Machinery Co ltd
Current assignee: Linxi Dongfang Machinery Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-07-22
Anticipated expiration: 2041-04-28
Also published as: CN113145889A

Abstract

The invention discloses a numerical control drilling machine which comprises a machine body and a control system arranged at one end of the machine body, wherein a feeding mechanism is horizontally arranged at the top of the machine body, a drilling mechanism capable of moving transversely is arranged on the feeding mechanism, a vertical plate is arranged at one side of the machine body, a clamping mechanism used for fixing a workpiece is arranged on the vertical plate, a limiting mechanism used for limiting the horizontal position of the workpiece is arranged at the other end of the machine body, a feeding and discharging mechanism is arranged at one end of the vertical plate and comprises a feeding mechanism and a discharging mechanism which are respectively arranged at a feeding port and a discharging port at one end of the vertical plate, and the feeding mechanism, the drilling mechanism and the clamping mechanism are electrically connected with the control system. Compared with the complicated punching process in the prior art, the invention does not need manual line drawing, center hole positioning and workpiece clamping, has simple and convenient processing process, can ensure the position precision of the pore channel, has high working efficiency and low labor intensity, and is suitable for the technical field of machining equipment.

Description

Numerical control drilling machine

Technical Field

The invention belongs to the technical field of machining equipment, and particularly relates to a numerical control drilling machine.

Background

The rectangular standard electromagnetic chuck is a machine tool accessory product produced by utilizing the electromagnetic principle, generating magnetic force by electrifying an internal coil, tightly sucking a workpiece contacted with the surface of a magnetic conduction panel through the magnetic conduction panel, realizing demagnetization by losing the magnetic force through the power failure of the coil and taking down the workpiece. Rectangle standard electromagnet's magnetic conduction panel is the work panel that is arranged and form through the bolt polyphone by the metal sheet of a plurality of bars and copper is crisscross, all carry out drilling many times on every metal sheet and the copper, among the prior art, the drilling process adopts the manual work to carry out the setting-out mark through the measuring tool usually, then through central punch location central point, the rethread anchor clamps are fixed to the workstation of drilling machine on, the workman punches one by one through drilling machine operating handle, its working process is comparatively loaded down with trivial details, and pore position precision can't be guaranteed, make the magnetic conduction panel equipment and the processing degree of difficulty, low work efficiency, high labor strength.

Disclosure of Invention

The invention provides a numerical control drilling machine, which solves the problems that in the prior art, a drilling process is complicated, the position precision of a hole channel cannot be guaranteed, the working efficiency is low, and the labor intensity is high.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the numerical control drilling machine comprises a machine body and a control system arranged at one end of the machine body, wherein a feeding mechanism is horizontally arranged at the top of the machine body, a drilling mechanism capable of moving transversely is arranged on the feeding mechanism, a vertical plate is arranged on one side of the machine body, a clamping mechanism used for fixing a workpiece is arranged on the vertical plate, a limiting mechanism used for limiting the horizontal position of the workpiece is arranged at the other end of the machine body, a feeding and discharging mechanism is arranged at one end of the vertical plate and comprises a feeding mechanism and a discharging mechanism which are respectively arranged at a feeding hole and a discharging hole at one end of the vertical plate, and the feeding mechanism, the drilling mechanism and the clamping mechanism are electrically connected with the control system.

Further, feed mechanism is including being used for depositing the feed tray of waiting to process the work piece, and the slope of feed tray sets up in the feed inlet outside, and one side that feed tray is close to the feed inlet is less than the one side of keeping away from the feed inlet, waits to process the work piece and arranges side by side in feed tray along direction of delivery, and the one end that the feed tray kept away from the feed inlet is equipped with the propelling movement cylinder that is used for waiting to process the work piece release, and the inboard of feed inlet is equipped with and is used for carrying the drive mechanism to fixture with waiting to process the work piece that feed tray came out.

Furthermore, discharge mechanism sets up in the discharge gate outside including being used for accomodating the ejection of compact tray of processing work piece, ejection of compact tray slope, and one side that ejection of compact tray is close to the discharge gate is higher than the one side of keeping away from the discharge gate to make processing work piece come out the back and smoothly landing to the downside under the action of gravity, arrange side by side in ejection of compact tray, the inboard of discharge gate is equipped with and is used for carrying the guiding mechanism to ejection of compact tray with processing work piece from fixture.

Further, guiding mechanism includes that the baffle box that sets up on the riser through the slope of a plurality of buffering conveying part, and the one end that the baffle box is close to the discharge gate is less than the one end of keeping away from the discharge gate, and buffering conveying part includes sleeve pipe and bracing piece, and the sleeve pipe sets firmly on the riser through the base, and the bracing piece is installed in the sleeve pipe, and the gyro wheel is installed in rotating on the top of bracing piece, and the bottom is equipped with buffer spring, and the notch with the gyro wheel adaptation is seted up to the baffle box bottom.

Further, fixture includes conveying unit and a plurality of die clamping cylinder, and die clamping cylinder sets firmly on the riser and is located the conveying unit top, is equipped with the ejection mechanism who is used for releasing the work piece from conveying unit on the riser, and die clamping cylinder's expansion end has set firmly the grip block, and die clamping cylinder's stiff end has set firmly the forked tail guide rail, sets up the dovetail with the forked tail guide rail adaptation on the riser.

Furthermore, the conveying unit comprises a bearing plate and a plurality of rolling bodies, the bearing plate is arranged side by side from top to bottom, the rolling bodies are fixedly arranged on the bearing plate, a workpiece conveying space is formed between the upper row of rolling bodies and the lower row of rolling bodies, each rolling body comprises one or more bearings, and the bearings are arranged on the bearing plate through connecting rods.

Furthermore, the bearing plate is fixedly arranged on the vertical plate through a bolt, and a long hole matched with the bolt is formed in the bearing plate.

Further, the feeding mechanism comprises a feeding motor, a lead screw and a feed rod, the feeding motor is fixedly arranged at the other end of the lathe bed, an output shaft is coaxially and fixedly connected with the lead screw, two ends of the lead screw and the feed rod are rotatably connected with two ends of the lathe bed, the lead screw is in threaded connection with the drilling mechanism, and the feed rod is in sliding connection with the drilling mechanism.

Furthermore, stop gear includes limiting base, and limiting base sets firmly on the riser through the bolt, sets up the square hole that is used for spacing chi to pass through in the middle of the limiting base, and the tip of spacing chi passes the square hole and offsets with the work piece tip and is fixed in on the limiting base through the jackscrew.

Further, the lathe bed other end is equipped with cooling system, and cooling system includes cooling tube, delivery pump, rose box and storage jar, and the rose box is linked together with storage jar and lathe bed inside, and the cooling tube is linked together and extends to drilling mechanism through delivery pump and storage jar.

Due to the adoption of the structure, compared with the prior art, the invention has the technical progress that: the positioning mechanism can horizontally position workpieces with different lengths at the position of the clamping mechanism, then the clamping mechanism clamps and fixes the workpieces, and then the control system controls the drilling mechanism to drill the workpieces according to the set drilling position and hole distance; meanwhile, through the arrangement of the feeding mechanism and the discharging mechanism, the automatic feeding and discharging can be realized, the structure is simple, the cost is low, the automation degree is improved, and the labor intensity of workers is reduced.

Compared with the complicated punching process in the prior art, the invention does not need manual line drawing, central hole positioning and workpiece clamping, has simple and convenient processing process, can ensure the position precision of the pore channel, has high working efficiency and low labor intensity, and is suitable for the technical field of mechanical processing equipment.

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 specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a feeding mechanism in an embodiment of the present invention;

FIG. 3 is a schematic view of a clamping mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a drilling mechanism according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion A of FIG. 3;

FIG. 6 is a schematic structural diagram of a feeding and discharging mechanism in an embodiment of the invention;

FIG. 7 is a schematic structural diagram of an ejection mechanism according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a guide mechanism in an embodiment of the present invention.

Labeling components: 1-a control system, 2-a bed body, 3-a storage tank, 31-a magnetic adsorption rod, 32-a cooling pipe, 33-a fixed seat, 4-a filter box, 5-a feed mechanism, 51-a feed motor, 52-a lead screw, 53-a feed rod, 6-a limiting ruler, 7-a limiting base, 8-a vertical plate, 9-a clamping mechanism, 90-a clamping cylinder, 91-a clamping plate, 92-a rolling body, 93-a bearing plate, 931-a long hole, 10-a workpiece, 11-a drilling mechanism, 111-a drilling motor, 112-a drilling feed unit, 113-a drill bushing, 114-a drill bit, 115-a chassis, 12-a material inlet and outlet mechanism, 120-a pushing cylinder, 121-a support and 122-a material outlet tray, 123-feeding tray, 124-guide chute, 125-buffer conveying part, 1251-base, 1252-sleeve, 1253-support rod, 1254-roller, 1255-spring, 126-driving wheel, 127-driving motor, 128-synchronous pulley component and 129-ejection cylinder.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for illustrating and explaining the present invention and are not to be considered as limiting the present invention.

The invention discloses a numerical control drilling machine, which comprises a machine body 2 and a control system 1 arranged at one end of the machine body 2, wherein the top of the machine body 2 is horizontally provided with a feeding mechanism 5, the feeding mechanism 5 is provided with a drilling mechanism 11 capable of moving transversely, one side of the machine body 2 is provided with a vertical plate 8, the vertical plate 8 is provided with a clamping mechanism 9 for fixing a workpiece 10, the other end of the machine body 2 is provided with a limiting mechanism for limiting the horizontal position of the workpiece 10, one end of the vertical plate is provided with a feeding and discharging mechanism 12, one end of the vertical plate is provided with a baffle plate, the baffle plate is provided with a feeding hole and a discharging hole, the feeding hole is positioned above the discharging hole, the feeding and discharging mechanism 12 comprises a feeding mechanism and a discharging mechanism which are respectively arranged at the feeding hole and the discharging hole at one end of the vertical plate, and the feeding mechanism 5, the drilling mechanism 11 and the clamping mechanism 9 are electrically connected with the control system 1. As shown in fig. 4, the drilling mechanism 11 includes a chassis 115, and a drilling power head is fixed on the chassis 115, and a drill 114 is fixed on the drilling power head. Specifically, the drilling power head comprises a drilling motor 111 and a drilling feeding unit 112 which are fixedly arranged on a chassis 115, a drill 114 is arranged on a drill sleeve 113 of the drilling feeding unit 112, a fixed seat 33 is arranged above the drill sleeve 113, and the cooling pipe 32 is fixed by the fixed seat 33 and is positioned above the drill 114.

Further, as shown in fig. 2, the feeding mechanism 5 includes a feeding motor 51, a lead screw 52 and a feed bar 53, the feeding motor 51 is fixedly arranged at the other end of the bed 2, an output shaft is coaxially and fixedly connected with the lead screw 52, two ends of the lead screw 52 and the feed bar 53 are rotatably connected with two ends of the bed 2, the lead screw 52 is in threaded connection with the drilling mechanism 11, and the feed bar 53 is in sliding connection with the drilling mechanism 11.

The invention has the beneficial effects that: the workpiece 10 with different lengths can be horizontally positioned at the position of the clamping mechanism 9 through the limiting mechanism, then the workpiece 10 is clamped and fixed through the clamping mechanism 9, then the drilling mechanism 11 is controlled through the control system 1 to drill the workpiece 10 according to the set drilling position and hole distance, the whole process is convenient and rapid, the manual clamping of the workpiece 10 and the drilling operation of the drilling machine are not needed, the operation error is avoided, the hole channel position precision is ensured, meanwhile, through the arrangement of the feeding mechanism and the discharging mechanism, the automatic feeding and discharging can be realized, the structure is simple, the cost is low, the automation degree is improved, and the labor intensity of workers is reduced.

As a preferred embodiment, as shown in fig. 6, the feeding mechanism includes a feeding tray 123 for storing the workpiece to be processed, the feeding tray 123 is obliquely arranged outside the feeding port, one side of the feeding tray 123 close to the feeding port is lower than one side far away from the feeding port, the workpiece to be processed is arranged in the feeding tray 123 in parallel along the conveying direction, one end of the feeding tray 123 far away from the feeding port is provided with a pushing cylinder 120 for pushing out the workpiece to be processed, and the inner side of the feeding port is provided with a driving mechanism for conveying the workpiece to be processed out of the feeding tray 123 to the clamping mechanism. The discharging mechanism comprises a discharging tray 122 used for accommodating processed workpieces, the discharging tray 122 is obliquely arranged outside the discharging port, one side of the discharging tray 122 close to the discharging port is higher than one side of the discharging port, so that the processed workpieces smoothly slide to a low side under the action of gravity after coming out of the discharging port and are arranged in the discharging tray 122 side by side, and a guide mechanism used for conveying the processed workpieces to the discharging tray 122 from the clamping mechanism is arranged on the inner side of the discharging port. Specifically, a support 121 is fixedly arranged on the outer side of one end of the vertical plate, and a feeding tray 123 and a discharging tray 122 are fixedly arranged on the support 121. The driving mechanism comprises a driving motor 127 and two driving wheels 1254, the two driving wheels 1254 are rotatably mounted on the vertical plate on the inner side of the feeding hole through rotating shafts, and the driving motor 127 is in transmission connection with the rotating shafts of the two driving wheels 1254 through a synchronous pulley assembly 128, so that the two driving wheels 1254 drive the middle workpiece to convey forwards. The mounting holes of the rotating shafts of the two driving wheels 1254 are also elongated holes so as to facilitate adjustment of the distance between the two driving wheels 1254 and adapt to workpieces with different widths. Through setting up feed mechanism and discharge mechanism, realize automatic feeding and unload, need not the manual participation of workman, improved work efficiency and degree of automation, reduced workman's intensity of labour.

Further, the guiding mechanism includes a material guiding groove 124 obliquely arranged on the vertical plate through a plurality of buffer conveying parts 125, one end of the material guiding groove 124 close to the discharge port is lower than one end far away from the discharge port, as shown in fig. 8, the buffer conveying parts 125 include a sleeve 1252 and a supporting rod 1253, the sleeve 1252 is fixedly arranged on the vertical plate through a base 1251, the supporting rod 1253 is arranged in the sleeve 1252, a roller 1254 is rotatably arranged at the top end of the supporting rod 1253, a spring 1255 for buffering is arranged at the bottom end of the supporting rod 1253, and a notch matched with the roller 1254 is formed in the bottom of the material guiding groove 124. By arranging the guide mechanism, the processed workpieces ejected by the ejection cylinder 129 from the clamping mechanism can fall into the material guide groove 124, are conveyed by the roller 1254 under the action of gravity, enter the discharging tray 122 through the discharging port and slide, reduce the friction resistance, and are arranged in the discharging tray 122 one by one. Through the arrangement of the buffer conveying part 125, the workpiece can be buffered in the process of falling into the guide chute 124, so that the workpiece is prevented from directly colliding with the guide chute 124 to cause damage to the workpiece and equipment, and meanwhile, noise pollution is reduced.

As a preferred embodiment, as shown in fig. 3 and 5, the clamping mechanism 9 includes a conveying unit and a plurality of clamping cylinders 90, the clamping cylinders 90 are fixedly disposed on the vertical plate 8 and located above the conveying unit, the vertical plate is provided with an ejection mechanism for ejecting the workpiece from the conveying unit, the ejection mechanism includes a plurality of ejection cylinders 129 fixedly disposed on the vertical plate, and the plurality of ejection cylinders 129 are uniformly disposed along the length direction of the workpiece, specifically, as shown in fig. 7, in this embodiment, the number of the ejection cylinders 129 is two, and by providing the ejection cylinders 129, the processed workpiece can be ejected from the conveying unit and fall into the guiding mechanism below, so that automatic unloading is achieved without manual unloading. The expansion end of centre gripping cylinder 90 has set firmly grip block 91, and the stiff end of centre gripping cylinder 90 has set firmly the forked tail guide rail, sets up the dovetail with the forked tail guide rail adaptation on the riser 8. The dovetail groove matched with the dovetail guide rail is arranged on the vertical plate 8, so that the clamping cylinder 90 can realize position adjustment on the vertical plate 8 to meet the clamping requirements of workpieces 10 with different lengths and different hole pitches and avoid interference with a drill 114 of the drilling mechanism 11. Through setting up centre gripping cylinder 90 and grip block 91, can fix work piece 10 simultaneously with the conveying unit, guarantee that work piece 10 can not take place the position removal at drilling in-process to guarantee the precision of punching, do not need workman manual clamping, through control system 1 and the cooperation of drilling mechanism 11, realize numerical control drilling processing, avoid setting-out and central location, avoid the operating error that the workman operation in-process appears, further guarantee the precision of punching, improve work efficiency, reduce intensity of labour.

Further, the conveying unit includes a supporting plate 93 disposed side by side up and down and a plurality of rolling elements 92 fixed on the supporting plate 93, and a conveying space for the workpiece 10 is formed between the upper row of rolling elements and the lower row of rolling elements 92. The rolling element 92 includes one or more bearings, and the bearings are mounted on the supporting plate 93 through a connecting rod, specifically, two bearings are mounted on the connecting rod in this embodiment, and the connecting rod is screwed on the supporting plate 93. The supporting plate 93 is fixedly arranged on the vertical plate 8 through bolts, the supporting plate 93 is provided with long holes 931 matched with the bolts, and the distance between the two supporting plates 93 can be adjusted according to different widths of different workpieces 10 by arranging the long holes 931 so as to adjust the distance between the two rows of rolling elements 92 to be matched with the workpieces 10, so that the workpieces 10 can smoothly pass through the two rows of rolling elements 92. A baffle is arranged at one end of the vertical plate 8, a feeding hole for the workpiece 10 to pass through is formed in the baffle, when the workpiece 10 is installed, the workpiece is conveyed to a position between the two rows of rolling bodies 92 from the feeding hole, the workpiece is conveyed forwards in a rolling mode until the end portion of the workpiece 10 abuts against the end portion of the limiting ruler 6 of the limiting mechanism, positioning is achieved, at the moment, the clamping cylinder 90 acts to clamp the workpiece 10, and preparation is made for subsequent drilling.

As a preferred embodiment, as shown in fig. 3, the limiting mechanism includes a limiting base 7, the limiting base 7 is fixedly arranged on the vertical plate 8 through a bolt, a square hole for the limiting ruler 6 to pass through is formed in the middle of the limiting base 7, and the end of the limiting ruler 6 passes through the square hole to abut against the end of the workpiece 10 and is fixed on the limiting base 7 through a jackscrew. The end part of the limit ruler is provided with a limit switch for detecting whether the workpiece is contacted with the limit ruler or not to ensure accurate positioning, and the limit switch is electrically connected with the control system. Through setting up stop gear, can carry out the level to the work piece 10 of different length spacing, adapt to multiple work piece 10 processing demands.

As a preferred embodiment, as shown in fig. 1, the other end of the bed 2 is provided with a cooling system, the cooling system comprises a cooling pipe 32, a delivery pump, a filter tank 4 and a storage tank 3, the filter tank 4 is communicated with the storage tank 3 and the inside of the bed 2, and the cooling pipe 32 is communicated with the storage tank 3 through the delivery pump and extends to the drilling mechanism 11. The entry of delivery pump is linked together with storage jar 3, and the one end of cooling tube 32 links to each other with the export of delivery pump, and the other end sets firmly in drilling unit head position through fixing base 33 to be located drill bit 114 top, cool off for drill bit 114 drilling in-process. The rose box 4 carries out the coarse filtration to the coolant liquid, gets rid of a large amount of scrap iron and carries out cooling, and the coolant liquid after the coarse filtration is carried to storage jar 3, establishes network structure's magnetic force in the storage jar 3 and adsorbs the stick 31 to get rid of tiny scrap iron.

The working principle of the invention is as follows:

firstly, distributing materials, namely placing workpieces to be processed into a feeding tray 123 side by side to prepare for punching and feeding;

secondly, a control system is started for feeding, the control system controls the pushing cylinder 120 to push the workpiece to be processed on the lowest portion in the feeding tray 123 forward to the middle of the two driving wheels 1254 of the driving mechanism, other workpieces to be processed sequentially slide down, and the two driving wheels 1254 are driven by the driving motor 127 to enable the workpiece to be processed to be conveyed forward between the two rows of rolling bodies of the conveying unit until the workpiece to be processed abuts against a limit ruler;

thirdly, clamping, wherein a limit switch at the end part of the limit ruler transmits a signal of the in-place workpiece to a control system, and the control system controls a clamping cylinder to act, so that the workpiece is clamped through a clamping plate;

then, punching, controlling a drilling mechanism to act by a control system to drill, and drilling according to the position and the pitch set by a system program, wherein simultaneously, a cooling system is started, and cooling liquid is sprayed out of a cooling pipe to cool a drill bit;

finally, unloading, after punching, the control system controls the drilling mechanism to reset, cooling is stopped, the clamping cylinder acts, the clamping plate loosens the workpiece, the ejection cylinder 129 of the ejection mechanism ejects the workpiece out of the conveying unit, the workpiece slides downwards through the guide mechanism until reaching a discharge port, enters the top of the discharge tray 122, slides to the bottom of the discharge tray 122 under the action of gravity, one workpiece is machined, the pushing cylinder 120 continues to act, clamping and feeding are carried out, the next workpiece is machined, and the operation is circulated in sequence.

Compared with the complicated punching process in the prior art, the manual line drawing, center hole positioning and workpiece 10 clamping are not needed, the machining process is simple and convenient, the hole channel position precision can be guaranteed, the working efficiency is high, the labor intensity is low, and the method is suitable for the technical field of machining equipment.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a numerical control drilling machine, includes the lathe bed and locates the control system of lathe bed one end, its characterized in that: the top of the lathe bed is horizontally provided with a feeding mechanism, the feeding mechanism is provided with a drilling mechanism capable of moving transversely, one side of the lathe bed is provided with a vertical plate, the vertical plate is provided with a clamping mechanism for fixing a workpiece, the other end of the lathe bed is provided with a limiting mechanism for limiting the horizontal position of the workpiece, one end of the vertical plate is provided with a feeding and discharging mechanism, the feeding and discharging mechanism comprises a feeding mechanism and a discharging mechanism, the feeding mechanism and the drilling mechanism are respectively arranged at a feeding port and a discharging port at one end of the vertical plate, and the feeding mechanism, the drilling mechanism and the clamping mechanism are electrically connected with a control system;

the feeding mechanism comprises a feeding tray for storing workpieces to be processed, the feeding tray is obliquely arranged outside the feeding port, one side, close to the feeding port, of the feeding tray is lower than one side, far away from the feeding port, of the feeding tray, the workpieces to be processed are arranged in the feeding tray in parallel along the conveying direction, one end, far away from the feeding port, of the feeding tray is provided with a pushing cylinder for pushing the workpieces to be processed out, and a driving mechanism for conveying the workpieces to be processed out of the feeding tray to the clamping mechanism is arranged on the inner side of the feeding port;

the discharging mechanism comprises a discharging tray for containing the processed workpiece, the discharging tray is obliquely arranged on the outer side of the discharging port, one side, close to the discharging port, of the discharging tray is higher than one side, far away from the discharging port, of the discharging tray, so that the processed workpiece can smoothly slide to a low side under the action of gravity after coming out of the discharging port and is arranged in the discharging tray in parallel, and a guide mechanism for conveying the processed workpiece to the discharging tray from the clamping mechanism is arranged on the inner side of the discharging port;

the clamping mechanism comprises a conveying unit and a plurality of clamping cylinders, the clamping cylinders are fixedly arranged on the vertical plate and are positioned above the conveying unit, an ejection mechanism used for pushing a workpiece out of the conveying unit is arranged on the vertical plate, a clamping plate is fixedly arranged at the movable end of each clamping cylinder, a dovetail guide rail is fixedly arranged at the fixed end of each clamping cylinder, and a dovetail groove matched with the dovetail guide rail is formed in the vertical plate;

the limiting mechanism comprises a limiting base, the limiting base is fixedly arranged on the vertical plate through a bolt, a square hole for the limiting ruler to pass through is formed in the middle of the limiting base, and the end part of the limiting ruler penetrates through the square hole to abut against the end part of the workpiece and is fixed on the limiting base through a jackscrew.

2. The numerically controlled drilling machine according to claim 1, wherein: the guide mechanism comprises a guide chute which is obliquely arranged on the vertical plate through a plurality of buffer conveying parts, one end, close to the discharge port, of the guide chute is lower than one end, away from the discharge port, the buffer conveying parts comprise a sleeve and a supporting rod, the sleeve is fixedly arranged on the vertical plate through a base, the supporting rod is installed in the sleeve, the top end of the supporting rod is rotated and installed with a roller, the bottom end of the supporting rod is provided with a buffer spring, and the bottom of the guide chute is provided with a notch matched with the roller.

3. A numerically controlled drill press as claimed in claim 1, wherein: the conveying unit comprises a bearing plate and a plurality of rolling bodies, the bearing plate is arranged side by side from top to bottom, the rolling bodies are fixedly arranged on the bearing plate, a workpiece conveying space is formed between the upper row of rolling bodies and the lower row of rolling bodies, each rolling body comprises one or more bearings, and the bearings are arranged on the bearing plate through connecting rods.

4. A numerically controlled drill press as claimed in claim 3, wherein: the bearing plate is fixedly arranged on the vertical plate through bolts, and the bearing plate is provided with a long hole matched with the bolts.

5. A numerically controlled drill press as claimed in claim 1, wherein: the feeding mechanism comprises a feeding motor, a lead screw and a feed rod, the feeding motor is fixedly arranged at the other end of the lathe bed, an output shaft is coaxially and fixedly connected with the lead screw, two ends of the lead screw and the feed rod are rotatably connected with two ends of the lathe bed, the lead screw is in threaded connection with the drilling mechanism, and the feed rod is in sliding connection with the drilling mechanism.

6. The numerically controlled drilling machine according to claim 1, wherein: the lathe bed other end is equipped with cooling system, and cooling system includes cooling tube, delivery pump, rose box and storage jar, and the rose box is linked together with storage jar and lathe bed inside, and the cooling tube is linked together and extends to drilling mechanism through delivery pump and storage jar.