阅读说明：本技术 多工位钻孔生产线 (Multi-station drilling production line ) 是由 金晨晨 陈安 杨忠诚 徐佳 于 2021-08-26 设计创作，主要内容包括：一种多工位钻孔生产线,包括机架(1),分别设置在所述机架(1)上的不同工位上的数个钻孔机(2),设置在所述机架(1)上用于将工件从上料端(3)经过不同工位后送往下料端(4)的输送机构(5)。其中,所述输送机构(5)具有保持工件的夹持装置(15)及传送工件的传送装置(16),其中所述夹持装置(15)与工件之间通过形状间非圆形状配合限制工件随钻头转动,并结合所述传送装置(16)在输送方向上的定位,而将工件定位在各个工位上。本技术方案的生产线在满足了加工时工件夹紧定位的要求的同时使生产线的结构更简单,也简化了机械动作,提高加工效率,满足了生产线加工的需求。(The utility model provides a multistation drilling production line, includes frame (1), sets up respectively several drilling machine (2) on the different stations in frame (1), sets up be used for in frame (1) send down conveying mechanism (5) of material end (4) after different stations with work piece from material loading end (3). The conveying mechanism (5) is provided with a clamping device (15) for holding the workpiece and a conveying device (16) for conveying the workpiece, wherein the clamping device (15) and the workpiece are matched with each other through a non-circular shape between shapes to limit the rotation of the workpiece while drilling, and the workpiece is positioned on each station in combination with the positioning of the conveying device (16) in the conveying direction. The production line of the technical scheme has the advantages that the structure of the production line is simpler while the requirement of clamping and positioning the workpiece during machining is met, the mechanical action is simplified, the machining efficiency is improved, and the requirement of production line machining is met.)

1. A multi-station drilling production line comprises

A frame (1);

the drilling machines (2) are arranged at different stations on the rack (1);

the conveying mechanism (5) is arranged on the rack (1), is provided with a feeding end (3) and a discharging end (4), and is used for conveying the workpiece to the discharging end (4) after passing through different stations from the feeding end (3);

the method is characterized in that:

the conveying mechanism (5) is provided with a clamping device (15) for holding the workpiece and a conveying device (16) for conveying the workpiece, wherein the clamping device (15) and the workpiece are matched to limit the rotation of the workpiece while drilling head through the non-circular shape between the shapes, and the workpiece is positioned on each station by combining the positioning of the conveying device (16) in the conveying direction.

2. The multi-station drilling production line of claim 1, wherein: the drilling machine also comprises an adjusting mechanism (6) which is arranged on the frame (1) and is used for supporting the drilling machine (2); the adjusting mechanism (6) is suitable for adjusting the drill bit carried by the drilling machine (2) to a required position at each station.

3. The multi-station drilling production line of claim 2, wherein: in the adjusting mechanism (6), a cross arm (8) which extends and is arranged perpendicular to the workpiece conveying direction is arranged corresponding to each drilling machine (2), the cross arm (8) can move back and forth relative to the machine frame (1) in a direction parallel to the workpiece conveying direction, and a longitudinal locking mechanism is arranged between the cross arm (8) and the machine frame (1); the drilling machine (2) is arranged on the cross arm (8) in a manner that the drilling machine can move back and forth relative to the cross arm (8) in a direction perpendicular to the workpiece conveying direction, and a transverse locking mechanism is arranged between the drilling machine (2) and the cross arm (8).

4. A multi-station drilling line according to claim 3, characterized in that: the adjusting mechanism (6) is provided with a longitudinal slide rail (7) which is respectively laid on the machine frame (1) along the workpiece conveying direction at two sides of the workpiece conveying path, and longitudinal slide blocks (9) which are correspondingly arranged at two ends of the cross arm (8) corresponding to the longitudinal slide rails (7); the cross arm (8) is provided with a transverse slide rail (10) which is laid along the direction vertical to the conveying direction of the workpiece, and the drilling machine (2) is provided with a transverse slide block (11) corresponding to the transverse slide rail (10).

5. The multi-station drilling production line of claim 4, wherein: the longitudinal slide rails (7) are arranged on a pair of elevated frames on the rack (1), and the cross arm (8) is provided with a cross beam (12) which is horizontally arranged and bridged on the pair of elevated frames and a mounting plate (13) which is fixed on the cross beam (12), extends along the cross beam (12) and is vertically arranged; the longitudinal sliding blocks (9) are arranged at two ends of the bottom of the cross beam (12); the transverse sliding rail (10) is arranged on the mounting plate (13); the mounting plate (13) is arranged above the cross beam (12), and a rib plate (14) is arranged between the mounting plate (13) and the cross beam (12) or the mounting plate and the cross beam are fixedly connected together through the rib plate (14).

6. A multi-station drilling line according to any one of claims 1 to 5, characterized in that: the conveying device (16) is provided with an annular flexible transmission element (18) extending from the feeding end (3) to the discharging end (4) and arranged on the frame (1), the transmission element (18) is supported by a driving roller (19) and a driven roller (20) in a tensioning mode, an interval corresponding to each station between the driving roller (19) and the driven roller (20) of the transmission element (18) moves from the feeding end (3) to the discharging end (4) is a processing section, and an interval corresponding to each station of the transmission element (18) moves from the discharging end (4) to the feeding end (3) is a return section; a plurality of clamping devices (15) are fixedly arranged on the transfer element (18) at intervals corresponding to the stations, and a non-circular open clamping groove (24) for embedding a workpiece is formed in each clamping device (15).

7. The multi-station drilling production line of claim 6, wherein: a first through-opening (25) is provided in the clamping groove (24) of the clamping device (15).

8. The multi-station drilling production line of claim 6, wherein: the holding device (15) is formed by a support plate (22) fixed with the transmission element (18) and a holding piece (23) detachably arranged on the support plate (22); the holding grooves (24) are formed on different holding members (23) corresponding to different products.

9. The multi-station drilling production line of claim 8, wherein: a second through hole (26) is formed in the supporting plate (22) corresponding to the portion where the clamping piece (23) is mounted, and a first through hole (25) is formed in the clamping groove (24) of the clamping piece (23).

10. A multi-station drilling line according to any one of claims 6 to 9, characterized in that: the conveying mechanism (5) further comprises bearing blocks (28) which are arranged on the frame (1) at least corresponding to two sides of the transfer element (18) at the station in parallel: the support block (28) provides support for the gripping device (15) at the machining section.

11. The multi-station drilling production line of claim 10, wherein: the support block (28) also has a support (29) which projects toward the base of the transfer element (18) of the machining section, the support (29) acting as a support guide for the transfer element (18).

12. A multi-station drilling line according to any one of claims 6 to 11, wherein: the conveying mechanism (5) is provided with a discharging mechanism (17) arranged at the discharging end (4); for removing the machined workpiece from the clamping groove (24).

13. A multi-station drilling line according to claim 12, characterized in that: the discharging mechanism (17) is provided with a reciprocating mechanism and an electromagnet arranged on the reciprocating mechanism; the reciprocating mechanism drives the electromagnet to approach or separate from the clamping groove (24) from the non-circular open side; the electromagnet is energized when it approaches the clamping groove (24) and de-energized when it leaves.

14. A multi-station drilling line according to claim 13, characterized in that: the reciprocating mechanism is a piston device (32).

15. A multi-station drilling line according to any one of claims 6 to 14, wherein: the two transmission elements (18) are arranged symmetrically left and right along the conveying direction, the driving rollers (19) of the two transmission elements (18) are driven to be fixed on the same driving shaft, and the transmission elements (18) and the driving rollers (19) are in tooth meshing transmission; each clamping device (15) is fixedly connected with two transfer elements (18).

16. A multi-station drilling line according to claim 15, characterized in that: the driving roller (19) is a toothed belt wheel, and the transmission element (18) is a toothed belt meshed with the toothed belt wheel.

17. A multi-station drilling line according to claim 15 or 16, wherein: the driven rollers (20) of the two transmission elements (18) are in tooth meshing transmission with the transmission elements (18).

18. A multi-station drilling line according to any one of claims 6 to 17, wherein: a tension adjusting mechanism (21) is arranged between the driven shaft of the driven roller (20) and the rack (1); and/or

The conveying mechanism (5) is also provided with a fluency strip (30) on the frame (1) corresponding to the return section, wherein the fluency strip (30) is suitable for providing support for the clamping device (15) on the return section and mounted on the transfer element (18); and/or

The conveying mechanism (5) is provided with guide side walls (27) which are arranged in parallel on two sides of the rack (1) corresponding to the transmission element (18); said guide side walls (27) slidingly contact corresponding end walls of said gripping means (15); and/or

A discharging groove (33) arranged on the rack (1) is arranged at the discharging end (4) of the conveying mechanism (5), and the discharging groove (33) is used for sliding off the machined workpiece; and/or

Below conveying mechanism (5), at least corresponding each the station be equipped with chip collector groove (31) on frame (1), accomodate the iron fillings that processing flew out.

Technical Field

The invention relates to a drilling device, in particular to a multi-station drilling production line.

Background

In the production process of industrial products, a phenomenon that one workpiece needs to be drilled with a plurality of different holes is often encountered. The drilling processing is carried out hole by adopting a manual mode, so that the technical requirement on workers is high, the labor intensity is high, and the problems of low processing efficiency and low precision exist. The processing of products by adopting an automatic production line is an effective method which is popular at present and can improve the production efficiency and ensure the processing quality.

For this purpose, the prior art already proposes a technical concept of providing a plurality of drilling stations which is suitable for continuous operation. For example, the multi-station drilling machine disclosed in chinese patent document CN103568140A includes a rotary table for transferring workpieces between different stations, six clamping mechanisms are uniformly arranged on the periphery of the upper surface of the rotary table in the circumferential direction, and each clamping mechanism is provided with a clamping mechanism and a loading mechanism cooperating with a loading cam. In the prior art, during work, workpieces to be machined need to be loaded into each corresponding loading mechanism one by one, and the loaded workpieces need to be clamped one by one. Since each workpiece needs to be independently loaded and clamped, the prior art needs a complex set of mechanical structures to complete the complicated actions, that is, the mechanism for realizing the corresponding actions is too complex.

Further, as disclosed in chinese patent document CN201329430Y, the drilling machine for use in a novel numerical control angle steel drilling production line is characterized in that an angle steel opening is placed downward on a material support frame when the drilling machine is in operation, and two drilling power heads with multiple spindles are adjustably arranged on a main board. The oil cylinder is arranged below the main board, the front face and the rear face of the main board are provided with the linear guide rails which are vertically placed, the main board can be lifted and fall under the action of lifting the oil cylinder, and the passing and pressing of angle steel are achieved. The pitch of the holes of the angle steel is controlled by a numerical control trolley arranged along the length direction of the angle steel. The angle steel is placed on the feeding channel and is clamped by the numerical control trolley to be fed. This prior art still provides for the successive clamping of the workpiece.

Disclosure of Invention

The invention aims to solve the technical problems of complex structure and complicated mechanical action in the prior art. Thereby providing a multistation drilling production line with simple structure.

In order to solve the technical problem, the invention provides a multi-station drilling production line, which comprises a rack;

the drilling machines are arranged at different stations on the rack respectively;

the conveying mechanism is arranged on the rack, is provided with a feeding end and a discharging end, and is used for conveying the workpieces to the discharging end after passing through different stations from the feeding end; wherein

The conveying mechanism is provided with a clamping device for holding the workpiece and a conveying device for conveying the workpiece, wherein the clamping device and the workpiece are matched through non-circular shapes between the shapes to limit the rotation of the workpiece while drilling head, and the workpiece is positioned on each station by combining the positioning of the conveying device in the conveying direction.

Further, the drilling machine further comprises an adjusting mechanism which is arranged on the frame and used for supporting the drilling machine; the adjusting mechanism is suitable for adjusting the drill bit carried by the drilling machine to a required position at each station.

Further, in the adjusting mechanism, a cross arm extending perpendicularly to the workpiece conveying direction is provided corresponding to each drilling machine, the cross arm is capable of reciprocating relative to the machine frame in the direction parallel to the workpiece conveying direction, and a longitudinal locking mechanism is arranged between the cross arm and the machine frame; the drilling machine is arranged on the cross arm in a reciprocating mode relative to the cross arm in the direction perpendicular to the workpiece conveying direction, and a transverse locking mechanism is arranged between the drilling machine and the cross arm.

Furthermore, the adjusting mechanism is provided with longitudinal slide rails which are respectively laid on the machine frame along the workpiece conveying direction on two sides of the workpiece conveying path, and longitudinal slide blocks which are correspondingly arranged at two ends of the cross arm corresponding to the longitudinal slide rails; and a transverse sliding rail paved along the direction vertical to the conveying direction of the workpiece is arranged on the cross arm, and a transverse sliding block is correspondingly arranged on the drilling machine corresponding to the transverse sliding rail.

Furthermore, the longitudinal slide rails are arranged on a pair of elevated frames on the rack, and the cross arm is provided with a cross beam which is horizontally arranged and bridged on the pair of elevated frames and a mounting plate which is fixed on the cross beam, extends along the cross beam and is vertically arranged; the longitudinal sliding blocks are arranged at two ends of the bottom of the cross beam; the transverse sliding rail is arranged on the mounting plate; the mounting plate is arranged above the cross beam, and a rib plate is arranged between the mounting plate and the cross beam or the mounting plate and the cross beam are fixedly connected together through the rib plate.

Further, the conveying device is provided with an annular flexible transmission element which extends from the feeding end to the discharging end and is arranged on the frame, the transmission element is supported by a driving roller and a driven roller in a tensioning mode, an interval between the driving roller and the driven roller, which corresponds to each station, of the transmission element moves from the feeding end to the discharging end is a processing section, and an interval of the transmission element moves from the discharging end to the feeding end is a returning section; the transfer element is fixedly provided with a plurality of clamping devices at intervals corresponding to the stations, and the clamping devices are provided with non-circular open clamping grooves used for embedding workpieces.

Further, a first through-hole is provided in the clamping groove of the clamping device.

Further, the clamping device is composed of a supporting plate fixed with the transmission element and a clamping piece detachably arranged on the supporting plate; the clamping grooves are formed on different clamping pieces corresponding to different products.

Furthermore, a second through hole is formed in the supporting plate corresponding to the part where the clamping piece is mounted, and a first through hole is formed in the clamping groove of the clamping piece.

Further, the conveying mechanism also has bearing blocks which are arranged on the frame at least corresponding to two sides of the transfer element at the station in parallel: the support block provides support for the clamping device at the machining section.

Furthermore, the support block also has a support part which extends to the bottom of the transfer element of the machining section and which serves for supporting and guiding the transfer element.

Further, the conveying mechanism is provided with a discharging mechanism arranged at the discharging end; the clamping groove is used for taking the machined workpiece out of the clamping groove.

Furthermore, the discharging mechanism is provided with a reciprocating mechanism and an electromagnet arranged on the reciprocating mechanism; the reciprocating mechanism drives the electromagnet to approach or separate from the clamping groove from the non-circular open side; the electromagnet is powered on when approaching the clamping groove and powered off when leaving the clamping groove.

Further, the reciprocating mechanism is a piston device.

Furthermore, the two transmission elements are arranged symmetrically left and right along the conveying direction, the driving rollers driving the two transmission elements are fixed on the same driving shaft, and the transmission elements and the driving rollers are in tooth meshing transmission; each clamping device is fixedly connected with the two transfer elements.

Further, the driving roller is a toothed belt wheel, and the transmission element is a toothed belt meshed with the toothed belt wheel.

Further, the driven rollers of the two transmission elements are in tooth meshing transmission with the transmission elements.

Furthermore, a tension adjusting mechanism is arranged between a driven shaft of the driven roller and the rack.

Further, the conveying mechanism is also provided with a fluency strip on the frame corresponding to the return section, and the fluency strip is suitable for providing support for the clamping device on the return section and mounted on the transfer element.

Further, the conveying mechanism is provided with guide side walls which are arranged in parallel on two sides of the rack corresponding to the transmission element; the guide side walls slidingly contact corresponding end walls of the clamping device.

Furthermore, a blanking groove arranged on the rack is arranged at the blanking end of the conveying mechanism and used for sliding off the machined workpiece.

And furthermore, below the conveying mechanism, at least corresponding to each station, a chip collecting groove is formed in the rack and used for collecting and processing flying iron chips.

The technical scheme of the invention has the following advantages:

1. the multi-station drilling production line provided by the invention limits the rotation of the workpiece while drilling head by the non-circular matching between the conveying mechanism and the workpiece, and positions the workpiece on each station by combining the positioning of the conveying device in the conveying direction. The requirement of clamping and positioning the workpiece during processing is ensured. Meanwhile, the workpiece does not need to be clamped and positioned at each station respectively, and is not needed to be transferred among stations after being clamped respectively. The production line has the advantages that the requirement of clamping and positioning the workpiece during machining is met, meanwhile, the structure of the production line is simpler, the mechanical action is simplified, the machining efficiency is improved, and the machining requirement of the production line is met.

2. An adjusting mechanism of the drilling machine is arranged to be matched with a replaceable clamping device, and a clamping groove which is matched with the shape of the non-circular shape between the shapes is arranged on the clamping device. The workpiece clamping is guaranteed, meanwhile, the machining of different workpieces of different products can be achieved, and the production line has the flexible machining capacity. Particularly, the clamping device consists of a supporting plate fixed on the transmission element and a clamping piece provided with a clamping groove, so that the clamping device does not need to be frequently disassembled on the transmission element, the clamping piece only needs to be replaced from the supporting plate when the type of the processed workpiece is replaced, and the adjustment between the transmission element and the clamping device caused by the replacement of the whole clamping device when the processed workpiece is replaced is reduced.

3. The supporting block is arranged, so that the clamping device is supported upwards at least in the machining process, the downward acting force of the transmission element on a workpiece is prevented from being directly resisted by the drill bit during machining, the extension deformation of the transmission element caused by the acting force is reduced, the strength requirement on the transmission element is lowered, and the service life of the transmission element is prolonged. The supporting part on the bearing block supports the transmission element in the working process, so that the transmission element further reduces the elongation deformation caused by the self weight, the strength requirement of the transmission element can be further reduced, and the service life is prolonged. The frame is provided with a fluency strip corresponding to the return section and used for supporting the clamping device, so that the weight of the transfer element and the clamping device in the return section is borne by the fluency strip, and the factors of elongation deformation of the transfer element are further reduced.

4. The electromagnetic unloading mechanism can accurately and effectively unload the machined workpiece from the production line, and the structure is simple and reliable.

5. The arrangement of the double transmission elements is adopted, so that the clamping device is fixedly supported by at least two points. And the two transmission elements are driven by the same driving roller to rotate, so that the two transmission elements are synchronous, the relative rotation between the clamping device and the transmission elements is not easy to generate, and the support is more stable and reliable. Furthermore, a transmission mode of tooth meshing is adopted between the driving roller and the transmission elements, so that the problem of asynchronous rotation of the two transmission elements caused by slipping is solved.

The guide side walls arranged in parallel corresponding to the two sides of the transmission element play a guiding role and simultaneously reduce or avoid the rotation torque born by the transmission element in the machining process.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below.

FIG. 1 is a perspective view of one embodiment of a multi-station drilling line of the present invention;

FIG. 2 is a perspective view from the opposite perspective of the embodiment of FIG. 1;

FIG. 3 is a schematic top view of the embodiment of FIG. 1;

FIG. 4 is a perspective view of the delivery device of the embodiment shown in FIG. 1;

FIG. 5 is a perspective view of a conveyor in the conveyor of the embodiment shown in FIG. 1;

fig. 6 is a schematic structural view of the clamping device in the embodiment shown in fig. 1.

Description of reference numerals:

1-a rack, 2-a drilling machine, 3-a feeding end, 4-a blanking end, 5-a conveying mechanism, 6-an adjusting mechanism, 7-a longitudinal slide rail, 8-a cross arm, 9-a longitudinal slide block, 10-a transverse slide rail, 11-a transverse slide block, 12-a cross beam, 13-a mounting plate, 14-a rib plate, 15-a clamping device, 16-a conveying device, 17-a discharging mechanism, 18-a transmission element, 19-a driving roller, 20-a driven roller, 21-a tensioning adjusting mechanism, 22-a supporting plate, 23-a clamping piece, 24-a clamping groove, 25-a first through hole, 26-a second through hole, 27-a guide side wall, 28-a bearing block, 29-a bearing part, 30-a fluent strip, 31-a chip collecting groove, 32-piston device, 33-discharge chute.

Detailed Description

The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings.

As shown in fig. 1 to 3, an embodiment of a multi-station drilling production line according to the present invention includes a frame 1, a plurality of drilling machines 2 respectively disposed at different stations on the frame 1, a conveying mechanism 5 disposed on the frame 1 and having a feeding end 3 and a discharging end 4, and an adjusting mechanism 6 disposed on the frame 1 for supporting the drilling machines 2 at the respective stations and adjusting a drill carried by the drilling machines 2 to a desired position.

In the adjusting mechanism 6, a longitudinal slide rail 7 is respectively laid on the machine frame 1 along the workpiece conveying direction at two sides of the workpiece conveying path, a cross arm 8 extending perpendicular to the workpiece conveying direction is provided corresponding to each drilling machine 2, a longitudinal slide block 9 is correspondingly arranged at two ends of the cross arm 8 corresponding to the longitudinal slide rail 7, the cross arm 8 is capable of reciprocating relative to the machine frame 1 in the direction parallel to the workpiece conveying direction, and a longitudinal locking mechanism (not shown in the figure) is arranged between the cross arm 8 and the machine frame 1. A transverse slide rail 10 (see fig. 2 and 3) running perpendicular to the workpiece transport direction is provided on the transverse arm 8, and a transverse slide 11 (see fig. 3) is provided on the drilling machine 2 in accordance with the transverse slide rail 10. The engagement of the transverse slide 10 with the transverse slide 11 allows the drill 2 to be mounted on the transverse arm 8 so as to be able to move back and forth relative to the transverse arm 8 perpendicularly to the workpiece transport direction, and a transverse locking mechanism (not shown) is provided between the drill 2 and the transverse arm 8. In the present embodiment, the longitudinal slide rails 7 are disposed on a pair of elevated frames on the frame 1, and the elevated frames are portions of the frame 1 higher than the workpiece processing plane at each station. The cross arm 8 is provided with a cross beam 12 which is horizontally arranged across a pair of the elevated frames and a mounting plate 13 which is fixed on the cross beam 12, extends along the cross beam 12 and is vertically arranged; the longitudinal sliding blocks 9 are arranged at two ends of the bottom of the cross beam 12. The transverse slide rail 10 is arranged on the mounting plate 13; the mounting plate 13 is arranged above the cross beam 12, and a rib plate 14 is arranged between the mounting plate 13 and the cross beam 12, or the mounting plate 13 and the cross beam are fixedly connected together through the rib plate 14.

Referring to fig. 1 to 4, the conveying mechanism 5 is used for conveying the workpieces from the feeding end 3 to the discharging end 4 after passing through different stations. The conveying mechanism 5 has a gripping device 15 for holding the work pieces, a conveying device 16 for conveying the work pieces, and a discharge mechanism 17 provided at the discharge end 4.

Referring to fig. 5, the conveyor 16 has an endless flexible transmission element 18 extending from the loading end 3 to the unloading end 4 and arranged on the frame 1, wherein the transmission element 18 is supported under tension by a driving roller 19 and a driven roller 20. In the present embodiment, the flexible endless transmission element 18 is two toothed belts disposed symmetrically left and right along the conveying direction, and the driving rollers 19 driving the two toothed belts are fixed on the same driving shaft. And the driving roller 19 is a toothed belt wheel in tooth meshing transmission with the toothed belt. A tension adjusting mechanism 21 (see fig. 4 and 5) is provided between the driven shaft of the driven roller 20 and the frame 1. Between the driving roller 19 and the driven roller 20, the section of the transfer element 18 moving from the feeding end 3 to the discharging end 4 and corresponding to each station is a processing section, and the section of the transfer element 18 moving from the discharging end 4 to the feeding end 3 is a return section; a plurality of the clamping devices 15 (see fig. 4) are fixedly mounted on the transfer elements 18 at intervals corresponding to the stations, and each clamping device 15 is fixedly connected with two transfer elements 18. Referring to fig. 6, the holding device 15 is composed of a supporting plate 22 fixed with the transmission element 18 and a holding member 23 detachably mounted on the supporting plate 22, and a holding groove 24 with a non-circular opening for embedding the workpiece is formed on the holding member 23; the holding grooves 24 are formed on the exchangeable different holding members 23 corresponding to different products and have different shapes and sizes. The clamping device 15 and the workpiece are matched with each other through the non-circular shape between the shapes to limit the rotation of the workpiece while drilling head, and the workpiece is positioned on each station in combination with the positioning of the conveying device 16 in the conveying direction, in the embodiment, the workpiece has a rectangular outline shape, so that the opening shape of the clamping groove 24 is also a rectangular shape matched with the outline shape of the workpiece. The holder 23 has a first through-hole 25 in the holder groove 24, and the retainer plate 22 has a second through-hole 26 formed therein corresponding to a portion to which the holder 23 is attached.

Referring to fig. 3 to 5, the conveying mechanism 5 of the present embodiment further has guide side walls 27 disposed in parallel on both sides of the frame 1 corresponding to the transfer member 18; the guide side walls 27 slidingly contact the corresponding end walls of the gripping device 15. The conveying means 5 also have parallel-arranged bearer blocks 28 on the frame 1 at least in correspondence of the two sides of the transfer element 18 at the stations: the support block 28 provides support for the gripping device 15 at the machining section. The support block 28 also has a support 29 which projects toward the bottom of the transfer element 18 of the machining section, the support 29 serving as a support guide for the transfer element 18. The transport mechanism 5 also has a fluency strip 30 provided on the frame 1 in correspondence with the return section, the fluency strip 30 being adapted to provide support for the gripping device 15 mounted on the transfer element 18 in the return section. Below the conveying mechanism 5, at least corresponding to each station, a chip collecting groove 31 is arranged on the frame 1 for accommodating and processing flying iron chips.

Referring to fig. 3 and 4, the unloading mechanism 17 is used to take out the processed workpiece from the holding groove 24. A piston device 32 as a reciprocating mechanism and an electromagnet arranged on the telescopic end of a piston rod in the piston device 32; the telescopic end of the piston rod drives the electromagnet to approach or depart from the clamping groove 24 from the non-circular open side; the electromagnet is energized when it approaches the holding groove 24 and de-energized when it leaves. A discharging groove 33 arranged on the rack 1 is arranged at the discharging end 4 of the conveying mechanism 5, and the discharging groove 33 is used for sliding off the machined workpiece.

In operation, the clamping members 23 having the corresponding non-circular open clamping grooves 24 are selected according to the size and type of the workpiece to be machined. And a selected group of said gripping members 23 is fixed to said stripper plate, thus completing the adjustment of the gripping means 15. And then, according to the size and the type of a workpiece to be processed, sliding the longitudinal slide block 9 arranged on the longitudinal slide rail 7 according to the position of each station on the longitudinal slide rail 7 to adjust the longitudinal position of each drilling machine 2, so that each drilling machine 2 aligns the longitudinal position of a hole to be drilled in the station, and locking the longitudinal slide block 9 and the longitudinal slide rail 7 with each other by adopting a longitudinal locking mechanism. In the same way, the transverse slide block 11 mounted on the drilling machine 2 slides on the transverse slide rail 10 fixed on each transverse arm 8, the transverse position of each drilling machine 2 is adjusted, so that each drilling machine 2 is aligned with the transverse position of the drilling required at the station, and the transverse slide block 11 and the transverse slide rail 10 are locked with each other by adopting a transverse locking mechanism.

After the adjustment is completed, the production line is started, the driving shaft in the conveying device 16 drives the two driving rollers 19 which are fixed on the driving shaft and linked with each other to rotate together, and the two toothed belt pulleys serving as the driving rollers 19 synchronously drive the conveying elements 18 serving as the conveying elements 18 which are respectively wound on the driving rollers 19 and the driven rollers 20 to rotate, so that the clamping devices 15 which are fixedly arranged on the conveying elements 18 and are arranged at intervals according to the intervals of the stations move together in the conveying direction. At the loading end 3 of the transport device 5, the workpieces to be machined are inserted one by one into the clamping grooves 24 of the clamping elements 23 of the clamping device 15. Since the clamping groove 24 of the clamping member 23 has the first through hole 25 therein and the pallet 22 is formed with the second through hole 26 corresponding to the portion where the clamping member 23 is mounted, even if the surface of the workpiece has different uneven structures, the workpiece can be smoothly inserted into the clamping groove 24 without being affected by the uneven structures. With further movement of the transfer element 18, the downward side of the carrier plate 22 of the holding device 15, which is fixed to the transfer element 18 for carrying the holding elements 23, comes into contact with the carrier block 28, which is fixed to the machine frame 1 in correspondence with the working section in which the transfer element 18 runs, and in the working section in which the transfer element 18 runs, the carrier plate 22 is held sliding on the carrier block 28, so that the weight of the carrier plate 22, the holding elements 23 and the work pieces which are clamped in the holding grooves 24 on the holding elements 23 in the holding device 15 is exerted on the carrier block 28, while the transfer element 18 exerts only a force of pulling on the holding device 15. At the same time, the fluency strip 30 is adapted to provide support for the gripping device 15 mounted on the transfer element 18 at the return section due to the fluency strip 30 mounted on the frame 1 corresponding to the return section where the transfer element 18 is running. In this way, the transmission element 18 is substantially free of gravitational pull during operation, which reduces the elongation of the transmission element 18 and greatly increases the service life of the transmission element 18. The guide side walls 27, which are arranged in parallel on both sides of the frame 1 corresponding to the transfer element 18, slidingly contact the corresponding end walls of the gripping device 15, guiding the path of travel of the gripping device 15, avoiding oscillations due to mechanical vibrations. With further movement of the transfer element 18, the first gripping device 15 with the workpiece inserted therein is transferred to the first station, where the drive of the drive shaft is stopped and locked in position (for example by means of the mechanical resistance of the transmission). And then the drilling machine 2 at the first station is started to work, and the corresponding hole is machined. The drill head of the drill 2 must produce a rotational torque on the workpiece during machining, while the non-circular engagement between the workpiece and the clamping groove 24 counteracts a twisting of the workpiece, while the fastening of the carrier plate 22 by the transmission element 18 and the fastening of the carrier plate 22 to the clamping element 23 counteract a twisting of the clamping element 23 in which the clamping groove 24 is located. In addition to the positioning and locking of the drive shaft in the transport device 16 at the station of the holding device 15, the position in the workpiece machining is stabilized. After the machining, the drilling machine 2 is returned, the drive shaft is restarted, the first workpiece-engaging gripper 15 is transferred to the second station, and the second workpiece-engaging gripper 15 is transferred to the first station, and the drive of the drive shaft is stopped again and locked in position. Then, the drilling machine 2 of the corresponding station performs the corresponding hole machining work. So that the third, fourth, etc. workpieces successively inserted into the subsequent clamping grooves 24 are cyclically moved until a workpiece is inserted into said clamping groove 24 on each of said clamping members 23 in the machining section. And each workpiece completes all the machining of the required machining stations, namely the machining of the workpiece is completed. In the processing process, the unprocessed iron filings fall into the scrap collecting groove 31 on the rack 1 arranged below the conveying mechanism 5 through the space between the clamping devices 15 or the first through hole 25 in the clamping groove 24 of the clamping piece 23 and the second through hole 26 of the supporting plate 22, and are collected in a centralized manner through the scrap collecting groove 31.

The processed workpiece is further transported to the unloading end 4 of the transporting mechanism 5 by the transferring element 18, at this time, the telescopic end of the piston rod of the piston device 32 of the unloading mechanism 17 arranged at the unloading end 4, on which the electromagnet is fixed, moves towards the clamping device 15 carrying the processed workpiece on the transferring element 18, when the electromagnet approaches the clamping groove 24 of the clamping device 15 carrying the processed workpiece, the electromagnet is powered on, for example, a button switch (not shown) for switching on the telescopic end of the piston rod is contacted and pressed at the position where the unloading end 4 approaches the transferring element 18, and the processed workpiece is attracted out of the clamping groove 24 by the magnetic force generated by the electromagnet. Then, the telescopic end of the piston rod of the piston device 32, to which the electromagnet is fixed, retracts, and during the retraction process, for example, the telescopic end of the piston rod is pulled out of the button switch, so that the electromagnet is powered off, and thus, while the electromagnet retracts and moves the workpiece with the processed workpiece, the electromagnetic attraction force on the held workpiece is lost, and the workpiece which has left the clamping groove 24 falls into the discharging groove 33 provided at the discharging end 4 of the rack 1 and slides to a required position by the discharging groove 33.

In the above embodiment, the installation position of the transverse slide rail 10 may be replaced by directly arranging the transverse slide rail 10 at the middle of the bottom of the cross beam 12, and the drilling machine 2 is hung on the transverse slide rail 10 through the transverse slide block 11.

In the above embodiment, the two ends of the transverse sliding rail 10 are respectively provided with a limiting component to facilitate the adjustment operation.

In the above-described embodiment, the holding device 15 can also be replaced by an integral component, and the non-circular open holding groove 24 for inserting the workpiece is formed directly on the holding device 15. When the flexible conversion is performed, the holding device 15 having the holding groove 24 of different shape and size is directly attached to and detached from the transfer member 18.

In the above embodiment, instead of the elevated frame, the longitudinal slide rail 7 may be directly laid on a platform where the height of the machine frame 1 is consistent with the height of the workpiece, and the cross arm 8 has two ends provided with support legs to form a gantry structure.

In the above embodiment, the unloading mechanism 17 may be replaced with a lever mechanism provided in the return section, in which the finished workpiece is ejected from the back side by the resistance arm section of the lever through the first and second through holes 26 of the clamping device 15. And let it fall into the lower chute 33.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.