CN111790944A

CN111790944A - Cutting machine head positioning structure and cutting machine head

Info

Publication number: CN111790944A
Application number: CN202010607660.1A
Authority: CN
Inventors: 唐明星
Original assignee: Hunan Jinlixing Machinery Technology Co ltd
Current assignee: Hunan Jinlixing Machinery Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-10-20

Abstract

The cutting machine head positioning structure comprises a machine head underframe, a cutting box body arranged on the machine head underframe in a swinging mode and a workpiece cutting device arranged on the cutting box body, wherein the workpiece cutting device comprises a cutting motor capable of driving a saw blade to rotate; the cutting box body is characterized by comprising a box underframe and a rear supporting ring which is arranged at the lower part of the box underframe and is in a semicircular structure, wherein the side edge of the rear supporting ring is fixedly connected with an auxiliary ring, the cutting box body also comprises two swing angle collision blocks which are respectively arranged at the left side and the right side of the auxiliary ring, and a swing angle limiting seat which is adaptive to the two swing angle collision blocks is arranged on the machine head underframe; the cutting box body comprises a box bottom frame and a rear supporting ring which is arranged on the lower portion of the box bottom frame and is of a semicircular structure, and the side edge of the rear supporting ring is fixedly connected with an auxiliary ring.

Description

Cutting machine head positioning structure and cutting machine head

Technical Field

The invention relates to a cutting machine head positioning structure, a cutting machine head applying the cutting machine head positioning structure and a double-head saw cutting machine.

Background

Section bar class work piece often needs its one end of cutting at least, generally both ends all will cut simultaneously, need both ends to cut into right angle or 45 degrees angles if door and window section bar class work piece, for improving section bar class work piece process velocity, often adopt double-end saw cutting machine assembly, current double-end saw cutting machine, for example application number is 201510992459.9, the name is "double-end saw structure of arbitrary pivot angle", the on-line screen storage device comprises a base, a supporting seat, the cutting knife box structure of setting in the supporting seat, install pivot and the rotary power device on the supporting seat through the bearing frame, cutting knife box structure installs in the pivot, be connected through fan-shaped slewing mechanism transmission between pivot and the rotary power device. For another example, the application number is 201911249930.X, the name is "a double-end saw for processing aluminum profiles", and the double-end saw comprises a machine base, a guide rail, a fixed saw head, a movable saw head and a material conveying frame, wherein the machine base is integrally bent and formed. The machines all have the common characteristic of comprising a cutting head, in which a box capable of swinging is arranged. How these oscillating cases achieve the oscillating positioning is of little concern in the prior art.

Disclosure of Invention

The invention mainly aims at the problems of how to reliably position a swinging box body and convenience in mounting and maintaining a positioning mechanism, and provides a cutting machine head positioning structure which comprises a machine head underframe, a cutting box body arranged on the machine head underframe in a swinging mode and a workpiece cutting device arranged on the cutting box body, wherein the workpiece cutting device comprises a cutting motor capable of driving a saw blade to rotate; the cutting box body is characterized by comprising a box bottom frame, a rear supporting ring which is arranged at the lower part of the box bottom frame and is of a semicircular structure, an auxiliary ring is fixedly connected to the side edge of the rear supporting ring, the cutting box body also comprises two swing angle collision blocks which are respectively arranged at the left side and the right side of the auxiliary ring, and a swing angle limiting seat which is adaptive to the two swing angle collision blocks is arranged on the machine head bottom frame; when the cutting box body swings clockwise or anticlockwise, the swing angle collision blocks at two different angle positions on the cutting box body can respectively touch the corresponding swing angle limiting seats; the cutting box is characterized by further comprising a swing angle driver, the swing angle driver is mounted on the machine head underframe, an output shaft of the swing angle driver is connected to the cutting box body, so that when the swing angle driver works, the output shaft of the swing angle driver can push the cutting box body to swing in a clockwise or anticlockwise direction, the cutting box body and the saw blade on the cutting box body stop swinging under the action of thrust of the output shaft of the swing angle driver and counter-braking force of the swing angle limiting seat, and the swing angle driver is limited at the positive and negative deflection positions.

Wherein the handpiece chassis is a rigid infrastructure of the entire cutting handpiece, with other components of the cutting handpiece being disposed directly or indirectly on the handpiece chassis.

The cutting box body is mainly used for forming a swinging structure and is used for bearing a workpiece cutting device; the workpiece cutting device comprises a cutting motor capable of driving a saw blade to rotate, the saw blade can be directly installed on an output shaft of the cutting motor or installed on a cutting main shaft in transmission connection with the output shaft of the cutting motor, and the cutting main shaft is driven to rotate by the output shaft of the cutting motor through a belt, a chain mechanism and the like.

According to the technical scheme, the beneficial technical effect is that firstly, the cutting box body comprises a box underframe and a rear trunnion ring which is arranged at the lower part of the box underframe and is of a semicircular structure, an auxiliary ring is fixedly connected to the side edge of the rear trunnion ring, so that the auxiliary ring and the rear trunnion ring can be made of different materials, the cost is reduced, and the processing, the assembly and the maintenance are convenient, for example, the auxiliary ring needs high-strength carbon steel due to good rigidity, and the rear trunnion ring mainly needs good welding performance and stability, so that low-strength carbon steel can be used. And for example, if the swing angle collision block is damaged, the swing angle collision block is easy to replace and repair. Secondly, due to the adoption of the matching between the swing angle collision blocks and the swing angle limiting seats, the matching between the two swing angle collision blocks and the corresponding two swing angle limiting seats can limit the swing range of the cutting box body within an angle range taking the lowest point position of the circumference of the rear supporting ring as a reference, such as a +/-45-degree swing range, and the limitation of the stop swing and positive and negative deflection of the cutting box body and the saw blade thereon is realized by means of the thrust of the output shaft of the swing angle driver, so that the saw blade can be conveniently debugged to a required deflection angle at any time, and the deflection state can be conveniently relieved at any time to reset the saw blade to an original point, thereby greatly improving the use flexibility and safety.

According to the technical scheme, the swing angle driver can be a driving air cylinder or a servo motor. In order to simplify the structure, the swing angle driver can be directly arranged on the machine head underframe in a swinging mode, and when the swing angle driver acts, the swing angle driver can swing on the machine head underframe along with the swinging of the cutting box body.

The further technical scheme can also be that the swing angle collision block and the swing angle limiting seat are matched at a position capable of limiting the cutting box body to be positioned in a +/-45-degree swing range.

The front side of the lowest point position of the circumference of the rear backing ring is provided with a base point positioning groove, the cutting device also comprises a cutting positioning plate connected to the auxiliary ring, and the front end of the cutting positioning plate extends into the base point positioning groove and continues to extend outwards; a base point cutting and positioning mechanism which is matched with the cutting and positioning plate is arranged on the machine head underframe and comprises an X-direction linear guide rail, an X-direction sliding block seat, an oil pressure buffer, an X-direction action cylinder, a sliding block push plate and a movable collision block; the X-direction linear guide rail is arranged on the machine head underframe, the X-direction slider seat is slidably arranged on the X-direction linear guide rail, the slider push plate is connected to the X-direction slider seat, the X-direction action cylinder is arranged on the machine head underframe and positioned outside the X-direction linear guide rail, and the push rod of the X-direction action cylinder is connected to the slider push plate so as to push the X-direction slider seat to slide on the X-direction linear guide rail by means of the slider push plate; the movable collision block is arranged on the X-direction slider seat and located on the swinging stroke of the lower position of the cutting positioning plate, the oil pressure buffer is arranged on the movable collision block and located on the swinging stroke of the upper position of the cutting positioning plate, when the rear backing ring on the cutting box body drives the cutting positioning plate to swing to the lowest point position, the oil pressure buffer is firstly contacted with the upper position of the cutting positioning plate to buffer and reduce the descending swinging speed and kinetic energy of the cutting positioning plate, and then the movable collision block is contacted with the lower position of the cutting positioning plate, so that the cutting box body stops swinging and is limited at the lowest point position under the action of the thrust of the output shaft of the swing angle driver and the reverse thrust of the movable collision block.

According to the above solution, it can be found that there are actually three positioning points, left, middle or right, on the auxiliary ring of the cutting box, and if these positioning points are set as adjustable structures, more positioning angles can be evolved.

The cutting box further comprises a rear supporting plate which is vertically arranged, the rear supporting plate is fixedly connected to the rear end of the machine head chassis, and the rear end of the cutting box body is rotatably connected to the rear supporting plate through a connecting shaft which is horizontally arranged; the front end of the lower part of the box underframe is provided with a front supporting ring in a semicircular structure, the rear supporting ring is positioned between the front supporting ring and the rear supporting plate, the machine head underframe is provided with a supporting wheel adjusting seat, the supporting wheel adjusting seat supports the front supporting ring but does not obstruct the swing of the cutting box body, and the rear supporting plate and the supporting wheel adjusting seat are matched to form support for the front end and the rear end of the cutting box body.

The rear end of the cutting box body is rotatably connected to the rear supporting plate through a connecting shaft which is horizontally arranged, the rear end of the cutting box body is positioned on a shaft which is arranged at the rear end of the cutting box body in reality but does not interfere with the swinging of the cutting box body, the front supporting ring is supported by the supporting wheel adjusting seat, and the front end of the cutting box body is positioned in the up-down direction and does not interfere with the swinging of the cutting box body in reality.

The technical scheme is that a middle supporting ring in a semicircular structure is further arranged on the lower portion of the box bottom frame, the middle supporting ring is located between the front supporting ring and the rear supporting ring, an angle positioning clamp is arranged on the machine head bottom frame and comprises two clamping arms, and the two clamping arms are respectively arranged on two sides below the middle supporting ring. The angle positioning clamp is used for clamping the middle supporting ring to realize braking and clamping the cutting box body to be positioned at the determined deflection angle when the deflection angle of the saw blade is determined under the control of the controller.

The cutting box body further comprises a bottom frame bottom cover, the bottom frame bottom cover is obliquely jointed below the box bottom frame, the connecting shaft is a hollow rotating shaft with a central hole, and the central hole forms a discharge channel of the saw dust cut by the workpiece and is jointed with an upper space of the bottom frame bottom cover.

The cutting box body further comprises a swing angle hinge shaft, and an output shaft of the swing angle driver is connected to the swing angle hinge shaft in a transmission mode, so that the cutting box body is pushed to swing in the clockwise direction or the anticlockwise direction through the swing angle hinge shaft.

Further technical solution may also be that the swing angle driver is rotatably mounted to the rear support plate through a swing seat.

The invention also provides a cutting head comprising a cutting head positioning structure as claimed in any one of claims 1 to 8; the fixed part of work piece is fixed during still including the cutting, work piece cutting fixed part sets up the front portion of aircraft nose chassis, work piece cutting fixed part includes cutting platform, the front portion of aircraft nose chassis is provided with preceding backup pad, cutting platform passes through preceding backup pad sets up on the aircraft nose chassis, the cutting box is located cutting platform's rear side, the last cutting groove that supplies the saw bit to stretch into that is provided with of cutting platform, cutting groove is located on the swing axis of cutting box, cutting platform's upper surface with the swing axis coincidence of cutting box.

The cutting box body further comprises an upright backup plate used for assisting in positioning the workpiece, the upright backup plate is located on the front side of the cutting box body and is positioned on the box bottom frame, the upright backup plate is located on the rear side edge of the cutting platform, a saw blade groove capable of extending out of the saw blade is formed in the upright backup plate, the saw blade groove is located at a position corresponding to the cutting groove in a matched mode, and the saw blade can continuously extend into the cutting groove after being located at any deflection angle.

Wherein the vertical backup plate is arranged at the front side of the cutting box body and positioned on the box underframe, for this reason, the relative position between the saw blade groove on the vertical backup plate and the saw blade is invariable, and the vertical backup plate and the saw blade groove on the vertical backup plate can swing relative to the cutting platform; because the cutting groove is positioned on the swing axis of the cutting box body, the upper surface of the cutting platform is superposed with the swing axis of the cutting box body, and the rotating plane of the saw blade (or the rotating plane of the meat biting tooth part of the saw blade) is superposed with the swing axis of the cutting box body, when the saw blade groove swings relative to the cutting platform, the projection of the cutting groove is always intersected with the projection of the saw blade groove when seen along the swing axis direction of the cutting box body, and the saw blade can extend into the cutting groove through the saw blade groove no matter at any deflection angle.

The present invention, having the above-mentioned features and advantages, can be applied to the cutting head and the double-end saw cutting machine.

Drawings

FIG. 1 is an isometric view of a double-ended saw cutter assembly of the present invention;

FIG. 2 is a right side view of the double-ended saw cutting machine of the present invention;

FIG. 3 is a schematic view of an exploded structure of a cutting head;

FIG. 4 is an isometric view of the front of the cutting head (with the hold-down cylinder removed) showing the idler adjustment seat structure;

FIG. 5 is an enlarged view of portion A of FIG. 4, showing the structure of the riding wheel adjusting seat;

FIG. 6 is an axial side view of the rear of the cutting head showing the swing angle limiting seat structure;

FIG. 7 is a schematic sectional view of the cutting head in front view;

FIG. 8 is a schematic cross-sectional view taken along the line C-C in FIG. 7;

FIG. 9 is an isometric view of the front of the cutter head (including the hold down cylinder);

FIG. 10 is an enlarged schematic view of section B of FIG. 9 showing the base point cutting positioning mechanism;

FIG. 11 is a side view of the cutting box shaft;

FIG. 12 is an exploded view of the workpiece cutting apparatus;

FIG. 13 is an isometric view of the upper nip assembly;

FIG. 14 is an isometric view of the side press assembly;

FIG. 15 is a schematic view of an explosive structure of a laser material height measuring device;

FIG. 16 is an isometric view of a horizontal carrier support;

FIG. 17 is a schematic view of a cross-sectional structure of a horizontal material supporting bracket in a front view direction;

FIG. 18 is an isometric view of the swing arm base from the side of the shaft;

fig. 19 is an isometric view of the holder.

Description of the marks

1-a horizontal frame, 2-a fixed cutting unit, 3-a movable cutting unit, 4-a laser material height measuring device and 5-a material supporting frame; 6-a machine head underframe, 7-a workpiece cutting fixing part, 8-a workpiece cutting device, 9-a cutting assembly mechanism and a P-section workpiece;

11-deep groove processing groove, 111-groove front wall part, 1110-front wall inclined plane 112-groove rear wall part, 12-linear horizontal rail, 13-horizontal material supporting bracket, 14-shield component, 15-machine head limiting seat, 16-guiding spur rack, 17-position adjusting stepping motor, 18-drag chain and 19-main machine induction sheet; 141-shield rotating shaft seat, 142-shield rotating shaft, 143-shield arm, 144-shield plate, 145-swing hinge lug and 146-shield cylinder; 130-swing arm base, 131-swing arm rotating shaft, 132-gas spring seat, 133-gas spring, 134-linear bolt sliding seat, 135-swing arm bottom cover, 136-torsion spring, 137-swing arm sliding block, 138-wedge bolt, 139-material supporting swing arm, 13 a-horizontal roller box, 13 b-swing arm roller seat, 13 c-swing arm roller, 13 d-deep groove ball bearing, 13 e-roller, 13 f-material stopping roller, 13 g-swing arm positioning flange, 13 i-V-shaped positioning opening, 13 j-swing arm mounting flange and 13 k-swing arm flange;

40-height measurement base, 41-height measurement working table plate, 42-height measurement auxiliary backup plate, 43-height measurement shell frame, 44-height measurement pressing plate, 45-height measurement cylinder, 46-laser height measurement component, 47-laser height measurement sensor, 48-laser signal controller, 49-, 421-height measurement longitudinal groove, 422-height measurement linear slide rail, 423-height measurement slide block and 424-pressing plate mounting seat;

50-a material support frame base, 51-a material support frame sliding seat, 52-a feeding bracket, 53-a roller, 54-a side roller, 55-a longitudinal beam, 56-a swing arm pressing wheel, 57-a material support frame sliding block, 58-a material support frame guard plate, 59-a height measuring button box, 501-a front material pressing bottom plate and 502-a front material pressing guide plate;

60-groove type sliding blocks, 61-front vertical plates, 62-rear vertical plates, 63-left vertical plates and 64-right vertical plates; 65-rear supporting plate, 66-angle positioning clamp, 67-base point cutting positioning mechanism, 671-X direction linear guide rail, 672-X direction sliding block seat, 673-hydraulic buffer, 674-X direction actuating cylinder, 675-cutting positioning plate, 676-sliding block push plate, 677-movable collision block, 678-second limiting screw; 68-riding wheel adjusting seats, 681-riding wheels, 682-pressing wheels, 683-fixing brackets and 684-adjusting brackets;

71-a cutting platform, 72-a cutting hold-down mechanism, 73-a blanking groove, 711-a cutting groove, 74-an upper pressing component, 75-a side pressing component, 76-a pressing cylinder seat, 77-a pressing cylinder, 78-an elastic pressing head, 741-a swinging upper pressing arm, 742-an upper pressing rolling head, 761-a cylinder clamping part, 762-an elastic adjusting groove, 763-an elastic adjusting threaded hole, 764-an elastic adjusting screw, 765-a positioning notch sliding groove, 766-a longitudinal position adjusting groove, 767-a step notch, 768-a lifting positioning plate, 769-a longitudinal position adjusting hole, 771-a transverse position adjusting plate, 772-a transverse position adjusting hole, 773-a transverse position adjusting bolt hole, 774-a positioning guide edge and 775-an indexing pin, 776-cylinder block limiting sheet, 777-fixing hole; 778-air cylinder spacing groove;

8 a-cutting executing mechanism, 8 b-cutting feed propelling mechanism, 8 c-cutting feed driver, 80-cutting feed sliding seat, 81-cutting support main frame, 810-main frame containing cavity, 811-cutting linear sliding rail, 812-belt cover, 82-cutting motor, 83-saw blade, 84-cutting main shaft, 85-cutting feed servo motor, 86-planetary reducer, 87-transmission rod, 88-cutting feed screw nut seat, 89-protective cover, 801-cutting groove rail, 821-driving belt pulley, 822-belt, 841-driven belt pulley, 860-transition plate, 861-collision block and 862-cutting support main frame travel switch;

921-front trunnion ring, 9211-outside working face of front trunnion ring, 9212-inside working face of front trunnion ring, 922-middle trunnion ring, 923-back trunnion ring; 924-base point positioning groove, 926-lubricating device, 927-lubricating oil distributor, 9230-auxiliary ring, 9231-swing angle hinge shaft, 9232-joint bearing, 9233-swing seat, 9234-swing angle cylinder, 9235-second bearing hole provided with rotating shaft, 9236-first bearing hole provided with swing angle deep groove ball bearing, 9237-swing angle limiting seat and 9238-swing angle collision block; 9239-first stop screw;

93-cutting box body, 930-box bottom frame, 931-upright backup plate, 932-left box shell, 933-right box shell, 934-top box shell, 935-saw blade cover, 936-hollow rotating shaft, 9360-central hole, 937-bottom frame cover and 938-backup plate saw blade groove.

Detailed Description

The invention and its advantageous technical effects are further explained in detail below with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, the double-end saw cutting machine comprises a horizontal frame 1 extending longitudinally left and right, a fixed cutting unit 2, a movable cutting unit 3, a material height measuring device 4 for measuring the height of a workpiece P, a material supporting frame 5 for supporting the workpiece P, and a controller; the horizontal type machine frame 1 is formed by combining and welding profile steel and metal plates, the fixed cutting unit 2, the movable cutting unit 3 and the material supporting frame 5 are arranged on the horizontal type machine frame 1, the fixed cutting unit 2 is fixed at the left end of the horizontal type machine frame 1, the movable cutting unit 3 and the material supporting frame 5 are arranged on the right side of the fixed cutting unit 2 and can move relative to the horizontal type machine frame 1 along the left-right longitudinal direction, the material supporting frame 5 is also fixed on the side face of the movable cutting unit 3 and is linked with the movable cutting unit 3, and the material height measuring device 4 is arranged on the material supporting frame 5. The controller is used for controlling the action of the whole double-end saw cutting machine. A control electric box is arranged on the left side of the horizontal rack 1, and the controller is stored in the control electric box.

The horizontal type machine frame 1 is provided with a deep groove processing groove 11 and a linear horizontal rail 12 which extend along the left and right longitudinal directions, and the deep groove processing groove 11 is mainly used for containing residual material tails and chips generated in cutting and can also be used as a rotary space for feeding. The deep groove machining groove 11 includes a groove front wall portion 111 and a groove rear wall portion 112, the groove rear wall portion 112 is a member having a certain width in the front-rear direction, and the width of the groove rear wall portion 112 is larger than the width of the groove front wall portion 111, a pair of the linear cross rails 12 are arranged in the front-rear direction and horizontally provided in the left-right longitudinal direction at the top of the groove rear wall portion 112 located behind the deep groove machining groove 11, and a pair of the linear cross rails 12 are located on the right of the fixed cutting unit 2. The bottom of the movable cutting unit 3 is provided with a groove type sliding block 60 which is matched with the linear horizontal rail 12 to slide, the movable cutting unit 3 is arranged on the pair of linear horizontal rails 12 through the groove type sliding block 60 in a sliding mode so as to move left and right in the horizontal direction, a cutting platform 71 is arranged at the front portion of the movable cutting unit 3, and at least part of the cutting platform 71 is suspended and extends to the upper portion of the deep groove processing groove 11, so that waste materials and scraps generated by processing on the cutting platform 71 can directly fall into the deep groove processing groove 11 to be collected in a centralized mode. The side of the top of the front wall 111 facing the deep groove machining tank 11 is provided with a front wall inclined surface 1110, and the front wall inclined surface 1110 enlarges the area of the notch of the deep groove machining tank 11, thereby not only facilitating more chip collection, but also improving the use safety and convenience by making the front shoulder of the deep groove machining tank 11 not be right-angled. The linear horizontal rail 12 is laterally provided with a host induction sheet 19 on the groove rear wall part 112, the host induction sheet 19 is in signal connection with a controller, the host induction sheet 19 is used for sensing the stroke position reached by the rightward sliding of the movable cutting unit 3, the laser material measuring height device 4 or the material supporting frame 5 and providing a sensing signal for the controller, and the controller responds to the sensing signal to determine the stroke of the rightward sliding of the movable cutting unit 3 from an electric control angle, for example, to send a stop signal or a revolution signal to the adjusting stepping motor 17. The right end of the horizontal rack 1 is provided with a machine head limiting seat 15, and the machine head limiting seat 15 is used for further limiting the maximum limit travel of the movable cutting unit 3, the laser material measuring height device 4 and the material supporting frame 5 sliding rightwards from the angle of mechanical limiting.

The rear side of horizontal frame 1 is equipped with and is on a parallel with the direction spur rack 16 of linear horizontal rail 12, be equipped with the drive on the activity cutting unit 3 is in gliding position adjustment step motor 17 on the linear horizontal rail 12, position adjustment step motor 17 drive gear, thereby gear engagement transmission direction spur rack 16 drags the activity cutting unit 3 is in move on the linear horizontal rail 12. The side of the horizontal rack 1 is provided with a drag chain 18, the drag chain 18 is used for protecting the wire pipes which are related to the movable cutting unit 3 and the horizontal rack 1, and various strong and weak electric signal lines on the movable cutting unit 3 are placed on the drag chain 18 and finally collected in the control electric box which is positioned on the left side of the horizontal rack 1. The drag chain 18 is composed of a plurality of bone segments and can be bent freely.

As shown in fig. 1 and 2, 2 horizontal material supporting brackets 13 capable of swinging and falling are arranged on the groove rear wall part 112 of the deep groove machining groove 11 of the horizontal frame 1, and in another scheme, the horizontal material supporting brackets 13 can also be arranged on the groove front wall part 111; the horizontal material supporting supports 13 are distributed in the motion track range of the movable cutting unit 3, the distance between the horizontal material supporting supports 13 is far larger than the width of the movable cutting unit 3 in the left-right direction, the head of each horizontal material supporting support 13 extends upwards, the movable cutting unit 3 can respectively touch the material supporting swing arms 139 of the horizontal material supporting supports 13 when moving left and right, and the material supporting swing arms 139 are moved to enable the movable cutting unit 3 to pass through from the top of the head of the movable cutting unit 3 when the movable cutting unit 3 touches the material supporting swing arms.

Referring to fig. 19, the material holder 5 includes a holder base 50, a feeding bracket 52, a front pressing bottom plate 501, a front pressing guide plate 502, and a height measurement button box 59; the feeding carriage 52 is arranged on the carriage base 50, and the laser measuring height device 4 is arranged at the front and rear side of the feeding carriage 52, so that the work of measuring the height can be arranged during the transfer of the workpiece P on the carriage 5. The upper part of the front pressing bottom plate 501 is arranged on the front side of the front part of the feeding bracket 52, the lower part of the front pressing bottom plate 501 is arranged on the material support base 50, the front pressing guide plate 502 is buckled outside the front pressing bottom plate 501, a side pressing component 75 is arranged between the front pressing guide plate 502 and the front pressing bottom plate 501, the side pressing component 75 and the laser material measuring height device 4 are opposite to each other in the front-back direction relative to the feeding bracket 52, a plurality of transverse rollers 53 are arranged on the feeding bracket 52 at intervals, and a plurality of upright side rollers 54 are arranged on the rear side of the feeding bracket 52 at intervals; a longitudinal beam 55 is arranged on the rear side of the material supporting frame base 50, swing arm pinch rollers 56 for pressing down a material supporting bracket arranged on the double-head saw frame are arranged at two ends of the longitudinal beam 55, a height measuring button box 59 is arranged on the front side of the material supporting frame base 50, and a starting button is arranged on the height measuring button box 59 and used for manually starting the controller to control the laser material height measuring device 4 to measure the workpiece P; as an equivalent solution, a sensor may be provided on the height measuring table 41 or the holder 5 to sense the workpiece P uploaded to the height measuring table 41 and the holder 5, thereby activating the controller. The rear side of the material support frame base 50 is connected with a material support frame sliding seat 51, 2 material frame sliding blocks 57 which slide along with 2 linear horizontal rails in a matched mode are arranged under the material support frame sliding seat 51, and a material support frame protection plate 58 which is vertically arranged is arranged on the left side of the material support frame sliding seat 51.

As shown in fig. 3 to 12, each of the fixed cutting unit 2 and the movable cutting unit 3 includes a cutting head, and the cutting head includes a head chassis 6, a workpiece cutting fixing portion 7 for fixing the workpiece P during cutting, a workpiece cutting device 8, and a cutting assembly mechanism 9. The fixed cutting unit 2 is fixed at the left end of the horizontal rack 1 through the machine head underframe 6.

The workpiece cutting fixing part 7 is arranged at the front part of the machine head underframe 6, the cutting assembly mechanism 9 is arranged at the rear side of the workpiece cutting fixing part 7, the workpiece cutting device 8 is arranged on the cutting assembly mechanism 9, and the workpiece cutting device 8 comprises a saw blade 83 capable of implementing sawing; the workpiece cutting fixing part 7 comprises a cutting platform 71 and a cutting pressing mechanism 72; the front portion of the machine head underframe 6 is provided with a front supporting plate, the cutting platform 71 is horizontally arranged on the machine head underframe 6 through the front supporting plate, the front supporting plate comprises a front vertical plate 61, a rear vertical plate 62, a left vertical plate 63 and a right vertical plate 64 which are arranged at the front portion of the machine head underframe 6 and respectively correspond to the front, rear, left and right directions, and the cutting platform 71 is connected to the front vertical plate 61, the rear vertical plate 62, the left vertical plate 63 and the right vertical plate 64.

A blanking groove 73 for blanking the cut workpiece p is formed in the lower right of the cutting platform 71, a notch of the blanking groove 73 is connected to the right side of the cutting groove 711 of the cutting platform 71, the cutting and pressing mechanism 72 includes a material pressing cylinder block 76 and an elastic pressing head 78, the material pressing cylinder block 76 of the cutting and pressing mechanism 72 is fixed to the front vertical plate 61, but may be fixed to the left vertical plate 63, the right vertical plate 64 or the machine head chassis 6 in another embodiment, and the elastic pressing head 78 of the cutting and pressing mechanism 72 is located above the cutting platform 71.

As shown in fig. 2, 9, 13 and 14, the cutting and pressing mechanism 72 includes a side pressing assembly 75 and an upper pressing assembly 74, each of the side pressing assembly 75 and the upper pressing assembly 74 includes a pressing cylinder block 76, a pressing cylinder 77 and an elastic pressing head 78, and the elastic pressing head 78 is disposed on a cylinder rod of the pressing cylinder 77; the upper end of the body of the material pressing cylinder seat 76 is provided with a cylinder clamping portion 761 for fixing the pressing cylinder 77, the top of the cylinder clamping portion 761 is provided with an elastic adjusting groove 762, both sides of the elastic adjusting groove 762 are provided with elastic adjusting threaded holes 763, and elastic adjusting screws 764 are arranged in the elastic adjusting threaded holes 763.

As shown in fig. 13 and 14, a lateral position adjusting plate 771 is disposed on a side surface of a body of the pressing cylinder 77, a plurality of lateral position adjusting holes 772 are disposed on the lateral position adjusting plate 771, the pressing cylinder 77 is detachably disposed in the cylinder holding portion 761, the lateral position adjusting plate 771 is inserted into the slack adjusting groove 762, a lateral position adjusting bolt hole 773 is disposed on a side wall portion of the slack adjusting groove 762, and the pressing cylinder 77 is fixed on the cylinder holding portion 761 by an indexing pin 775 passing through the lateral position adjusting hole 772 and being inserted into the lateral position adjusting bolt hole 773.

The pressing cylinder block 76 is provided with a longitudinal position adjusting groove 766 arranged longitudinally on the body, the back of the pressing cylinder block 76 is provided with a concave step-shaped notch 767, a lifting positioning plate 768 for controlling lifting is arranged in the step-shaped notch 767, and the lifting positioning plate 768 is provided with a plurality of longitudinal position adjusting holes 769. As shown in fig. 12, in the side swaging assembly 75, the pressing cylinder 77 is a telescopic cylinder; as shown in fig. 13, in the upper pressing assembly 74, the pressing cylinder 77 is a rotary clamping cylinder, a cylinder rod of the rotary clamping cylinder is provided with an upper swinging pressing arm 741 perpendicular to the cylinder rod, and the elastic pressing head 78 is an upper pressing roller 742 disposed at an end of the upper swinging pressing arm 741.

As shown in fig. 13 and 14, both sides of the bottom of the lateral position adjusting plate 771 are provided with positioning guide edges 774, the bottom of the slack adjusting groove 762 is provided with positioning notch sliding grooves 765 matched with the positioning guide edges 774, the back of the cylinder clamping portion 761 is provided with a cylinder seat limiting piece 776 preventing the pressing cylinder 77 from moving above the cylinder clamping portion 761, the middle of the cylinder seat limiting piece 776 is provided with a cylinder limiting groove 778 accommodating the lateral position adjusting plate 771, the cylinder seat limiting piece 776 is provided with fixing holes 777 at both sides of the cylinder limiting groove 778, the cylinder seat limiting piece 776 passes through the fixing holes 777 by screws and is fixed at the back of the cylinder clamping portion 761, and the cylinder limiting groove 778 of the cylinder seat limiting piece 776 is clamped on the lateral position adjusting plate 771.

As shown in fig. 2 to 11, the cutting assembly mechanism 9 includes a cutting box 93 for mounting the workpiece cutting device 8, and generally, the cutting box 93 is disposed at the rear side of the cutting platform 71, and the cutting box 93 can swing and be positioned in a clockwise or counterclockwise direction with respect to the head chassis 6 and the cutting platform 71. The cutting box 93 further comprises support rings of a semicircular structure which are respectively arranged at the front, middle and rear positions of the lower part of the cutting box, namely a front support ring 921, a middle support ring 922 and a rear support ring 923 which are arranged at intervals, wherein the rear support ring 923 and the middle support ring 922 are positioned between the front support ring 921 and the rear support plate 65, and the rear support ring 923 is positioned between the middle support ring 922 and the rear support plate 65; the circular arc part of preceding trunnion ring 921, well trunnion ring 922 and back trunnion ring 923 sets up down, preceding trunnion ring 921, well trunnion ring 922 and back trunnion ring 923 have different functions and corresponding cooperation structure respectively. Next, the cutting assembly mechanism 9 further includes an angle positioning clamp 66, a base point cutting positioning mechanism 67, a riding wheel adjusting seat 68, a swing angle driver, a swing angle limiting seat 9237, and the like, which are arranged on the head underframe 6, and are respectively described below.

As shown in fig. 3, the front trunnion ring 921 is used to support and position one end of the cutting box 93. As shown in fig. 6, the front trunnion ring 921 includes a cross-section having an L-shaped configuration, and includes a front trunnion ring outer side working surface 9211 located on the outer side and a front trunnion ring inner side working surface 9212 located on the inner side. Be provided with 2 groups on aircraft nose chassis 6 riding wheel regulation seat 68, 2 groups riding wheel regulation seat 68 is controlled the spaced apart branch and is put both sides about preceding trunnion ring 921 below, every group all be equipped with on the riding wheel regulation seat 68 with preceding trunnion ring 921 preceding trunnion ring outside working face 9211 contact top leans on and can the pivoted riding wheel 681 and press and be in on the inboard working face 9212 of preceding trunnion ring and pinch roller 682 that can rotate. Thus, the idler 681 and the pressing wheel 682 form a pressing support pair and can rotate to support and position the front end (free end) of the cutting box 93 in the up-down direction without preventing the cutting box 93 from swinging along the axis. The riding wheel adjusting seat 68 further comprises a fixed bracket 683, and the riding wheel 681 is rotatably arranged on the fixed bracket 683; the idler adjusting seat 68 further comprises a rotatable adjusting bracket 684, the pressing wheel 682 is connected to the adjusting bracket 684, and a return spring is further arranged on the adjusting bracket 684 and pushes the adjusting bracket 684 to swing downwards so as to apply a downward working pressure to the front-retainer-ring inner working surface 9212 through the pressing wheel 682. The adjusting bracket 684 and the fixing bracket 683 can be connected together or can be disposed on the handpiece chassis 6.

Next, a lubricating oil distributor 927 is provided on the head chassis 6, a lubricating device 926 for supplying lubricant to the front carrier 921 is provided near the front carrier 921, and the lubricating oil distributor 927 supplies lubricant to the lubricating device 926.

Secondly, the handpiece underframe 6 further comprises a rear supporting plate 65 vertically arranged at the rear end thereof, the upper part of the rear supporting plate 65 is provided with a first bearing hole 9236 provided with a swinging angle deep groove ball bearing, the cutting box body 93 further comprises a connecting shaft 936 horizontally arranged, the connecting shaft 936 is arranged below the rear end of the cutting box body 93, and the connecting shaft 936 is provided with a central hole and is also called a hollow rotating shaft 936 in the invention. The hollow shaft 936 extends horizontally and is rotatably sleeved in the deep groove ball bearing of the first bearing hole 9236. Thus, the combination of the rear support plate 65 and the hollow rotating shaft 936 forms a rear end support for the cutting box 93, and forms a two-end support for the cutting box 93 in at least two dimensions in cooperation with the supporting roller adjusting seat 68, and secondly, the rotation axis of the hollow rotating shaft 936 defines a swing axis of the cutting box 93, the swing axis of the cutting box 93 is fixed, the upper surface of the cutting platform 71 is horizontally arranged and also fixed, the upper surface of the cutting platform 71 coincides with the swing axis of the cutting box 93, the cutting groove 711 is located on the swing axis of the cutting box 93, the upper surface of the cutting platform 71 and the swing axis of the cutting box 93 are both at the same horizontal height position, so that not only the profile workpiece P can be positioned by means of the upper surface of the cutting platform 71, but also the lifting position of the saw blade 83 to the profile workpiece P can be conveniently calculated and determined, or the distance between the fixed cutting unit 2 and the movable cutting unit 3 provided with the cutting machine head is determined, and then the controller controls and drives the movable cutting unit 3 to move rightwards to a specified position. According to the above technical solution, it is also substantially defined that a rotation plane of the saw blade 83 (or a rotation plane of the biting teeth of the saw blade 83) and a swing axis of the cutting box 93 are coincident, otherwise it cannot be guaranteed that the saw blade 83 is extended into the cutting groove 711. Wherein the rotation center line of the saw blade 83 is perpendicular to but not necessarily intersects the swing axis of the cutting box 93, and may be disposed at a position higher than, lower than, or intersecting the swing axis of the cutting box 93.

As shown in fig. 7, the center trunnion ring 922 is used to stabilize the angular orientation of the cutting box 93. The angle positioning clamp 66 is arranged on the machine head underframe 6, and the angle positioning clamp 66 is an air compression disc brake; the two clamping arms of the angle positioning clamp 66 are respectively arranged at two sides of the lower surface of the middle supporting ring 922, and the angle positioning clamp 66 is used for clamping the middle supporting ring 922 by a clamping action when the deflection angle of the saw blade 83 is determined under the control of the controller so as to realize braking and clamp the cutting box body 93 to be positioned at the determined deflection angle.

As shown in fig. 3, 9 and 10, the rear trunnion ring 923 is used for cooperating with the swing angle driver to form angle adjustment and positioning of the cutting box 93.

Wherein, the swing angle driver can be an air cylinder or a servo motor. In order to simplify the construction, the pivot angle drive can be arranged directly on the machine head chassis 6 so as to be able to pivot, and can pivot on the machine head chassis 6 as the cutting box 93 pivots when the pivot angle drive is actuated. In this embodiment, the swing angle driver adopts a driving cylinder, i.e., a swing angle cylinder 9234, and an output shaft of the swing angle driver is a cylinder rod (also referred to as a push rod) of the swing angle cylinder 9234.

The cutting box body 93 further comprises a swinging angle hinge shaft 9231, one end of the swinging angle hinge shaft 9231 is connected to a position (but not necessarily the maximum deviation position) on the rear supporting ring 923, which is far away from the swinging axis of the cutting box body 93, and the other end of the swinging angle hinge shaft 9231 is provided with a joint bearing 9232; as an equivalent embodiment, the pivot hinge shaft 9231 may be attached to other suitable locations on the cutting box 93. The push rod of the swing angle cylinder 9234 extends upwards and is connected to the joint bearing 9232, so that when the swing angle cylinder 9234 works, the push rod can stretch out and draw back to push the cutting box 93 to swing clockwise or anticlockwise through the swing angle hinge shaft 9231, and thus angle adjustment is realized. The installation mode of the swing angle cylinder 9234 comprises that firstly, the swing angle cylinder 9234 is rotationally installed on the machine head underframe 6 through a swing seat 9233; secondly, the lower right side of the rear supporting plate 65 is provided with a second bearing hole 9235 provided with a rotating shaft, the swinging seat 9233 is connected to the rotating shaft arranged on the second bearing hole 9235 so as to enable the swinging seat 9233 to rotate on the rear supporting plate 65, and the swinging cylinder 9234 is connected to the swinging seat 9233, so that when the cutting box 93 is pushed to swing, the swinging cylinder 9234 also swings adaptively on the rear supporting plate 65.

Further, as shown in fig. 3 to 8, a circumferential lowest point position of the rear trunnion ring 923 is selected, a base point positioning groove 924 is arranged on the front side of the circumferential lowest point position, the side edge of the rear trunnion ring 923 is fixedly connected with an auxiliary ring 9230 through a screw, the cutting device further comprises a cutting positioning plate 675 fixedly connected to the auxiliary ring 9230, the front end of the cutting positioning plate 675 extends into the base point positioning groove 924 and continues to extend outwards, and the rear edge of the base point positioning groove 924 and the rear edge of the cutting positioning plate 675 are aligned to the circumferential lowest point position of the rear trunnion ring 923. The machine head chassis 6 is provided with a swing angle limiting seat 9237 which is adapted to the two swing angle collision blocks 9238, and the swing angle limiting seat 9237 is arranged on the swing track of the swing angle collision blocks 9238; when the cutting box 93 swings clockwise or counterclockwise, the swing angle collision blocks 9238 at two different angle positions on the cutting box will respectively touch the corresponding swing angle limiting seats 9237. Two block 9238 is bumped with two that correspond the spacing seat 9237 cooperation of pivot angle can with the swing range of cutting box 93 is injectd in with the angle range for example 45 swing range of the circumference minimum point position of back trunnion ring 923 basis, and it is right to rely on the thrust of the push rod of pivot angle cylinder 9234 to realize cutting box 93 and on it saw bit 83 stops the regulation of swing and positive and negative deflection, so not only be convenient for at any time with saw bit 83 debugs to required deflection angle but also be convenient for remove the deflection state at any time and let saw bit 93 reset to basic point cutting position (original point), thereby greatly improved flexibility and the security of using. For example, with the lowest circumferential position of the rear retainer ring 923 as a reference, the swing angle collision block 9238 is disposed on the auxiliary ring 9230 that ensures the cutting box 93 to deflect by ± 45 ° (circle center angle), and the two swing angle collision blocks 923 are separately disposed at ± 45 ° positions with the lowest circumferential position of the rear retainer ring 923 as a reference, so as to be able to limit the cutting box 93 to be located within a ± 45 ° swing range; the swing angle collision block 9238 is provided with a first limit screw 9239, and the first limit screw 9239 is used for finely adjusting the position of the contact angle. A swing angle limiting seat 9237 which is in matching swing contact with the first limiting screw 9239 on the two swing angle collision blocks 9238 is arranged on the machine head underframe 6 and in the space between the rear supporting plate 65 and the rear supporting ring 923, when the cutting box 93 swings clockwise or counterclockwise, the first limit screws 9239 at two different angle positions on the cutting box will respectively touch the corresponding swing angle limit seats 9237, the swing angle limiting seat 9237 can limit the maximum swing angle of the cutting box body 93 to clockwise or counterclockwise directions respectively not to exceed +/-45 degrees, and defines said cutting box 93 in one direction in a position of maximum oscillation angle ± 45 °, therefore, under the synergistic action of the thrust of the push rod of the swing angle cylinder 9234 and the reverse thrust of the swing angle limiting seat 9237, the cutting box 93 and the saw blade 83 thereon stop swinging and are limited at a deflection position of +/-45 degrees.

In the above solution, it can be seen that the swing angle of the cutting box 93 in the clockwise or counterclockwise direction can be changed only by appropriately changing the angular positions of the two swing angle limiting seats 9237. Secondly, back trunnion ring 923 mainly need have better welding performance thereby can weld on the case chassis 930, and thereby supplementary ring 9230 mainly has better rigidity is convenient for shock-resistant and non-deformable, in another kind of option as long as the material performance of selection is suitable can with back trunnion ring 923 with supplementary ring 9230 unites two into one.

As shown in fig. 3, 8, 9 and 10, the base point cutting positioning mechanism 67 is mainly used to define a base point position (which may also be referred to as a 0 ° position between ± 45 °) of the cutting box 93 in cooperation with the cutting positioning plate 675. The base point cutting positioning mechanism 67 comprises an X-direction linear guide 671, an X-direction slider seat 672, an oil buffer 673, an X-direction actuating cylinder 674, a slider push plate 676 and a movable collision block 677. The X-direction linear guide 671 is disposed on the head chassis 6 below a position between the middle trunnion ring 922 and the rear trunnion ring 923, the X-direction slider seat 672 is slidably disposed on the X-direction linear guide 671, the slider push plate 676 is connected to the X-direction slider seat 672, the X-direction actuating cylinder 674 is disposed on the head chassis 6 and disposed in parallel outside the X-direction linear guide 671, and a push rod of the X-direction actuating cylinder 674 is connected to the slider push plate 676 so as to be able to push the X-direction slider seat 672 to slide on the X-direction linear guide 671 by means of the slider push plate 676. The movable collision block 677 is arranged on the X-direction slider seat 672 and located on the swing stroke of the lower position of the cutting positioning plate 675, the hydraulic buffer 673 is arranged on the movable collision block 677 and located on the swing stroke of the upper position of the cutting positioning plate 675, that is, the hydraulic buffer 673 and the movable collision block 677 are arranged up and down, the lower position of the cutting positioning plate 675 is provided with a second limit screw 678 capable of contacting with the movable collision block 677, and the second limit screw 678 is used for finely adjusting the contact angle position. When the rear retainer ring 923 on the cutting box 93 drives the cutting positioning plate 675 to swing to the lowest point, the hydraulic buffer 673 firstly contacts with the upper part of the cutting positioning plate 675 to buffer and reduce the descending swing speed and kinetic energy of the cutting positioning plate 675, and then the movable stopper 677 contacts the second limit screw 678 at the lower part of the cutting positioning plate 675, so that the cutting box 93 stops swinging and is limited at the lowest point under the action of the thrust of the push rod of the swing cylinder 9234 and the counter-braking force of the movable stopper 677. When the X-direction slider seat 672 is pushed to slide by the X-direction actuating cylinder 674 under the control of the controller, the hydraulic buffer 673 and the movable collision block 677 can be carried out to leave the rotating track range of the cutting positioning plate 675, so that the cutting box body 93 can continuously swing or retract forwards.

As shown in fig. 4 to 9 and 11, the cutting box 93 includes a box chassis 930, a box housing, a blade cover 935, a hollow rotating shaft 936, a chassis bottom cover 937 and an upright backup plate 931 for assisting in positioning the workpiece, wherein the box housing includes a left box housing 932, a right box housing 933 and a top box housing 934; the box bottom frame 930 is a rigid mounting base for the whole cutting box body 93, and the front trunnion ring 921, the middle trunnion ring 922 and the rear trunnion ring 923 are respectively arranged below the box bottom frame 930 and are welded to the box bottom frame 930. The left box shell 932 and the right box shell 933 are respectively installed and fixed on the left side and the right side of the box bottom frame 930, the top box shell 934 is positioned between the tops of the left box shell 932 and the right box shell 933, at least part of components of the workpiece cutting device 8, such as the saw blade 83, are contained in a containing cavity formed by the left box shell 932, the right box shell 933 and the top box shell 934, the saw blade cover 935 is vertically arranged at the opening part at the rear end of the containing cavity of the cutting box 93 and covers the saw blade 83 of the cover part to concentrate saw dust sawed by the saw blade 83, and particularly, the outward splashing of the saw dust can be greatly reduced. The standing backup plate 931 is disposed at the front side of the box bottom frame 930, the left box housing 932 and the right box housing 933, a blade groove 938 capable of allowing the blade 83 to protrude is disposed at the middle position of the standing backup plate 931, and since the standing backup plate 931 is disposed at the front side of the cutting box 93 and positioned on the box bottom frame 930, the relative position between the blade groove 938 and the blade 83 on the standing backup plate 931 is constant, and the standing backup plate 931 and the blade groove 938 thereon can swing with respect to the cutting platform 71; since the cutting groove 711 is located on the swing axis of the cutting box 93 and the upper surface of the cutting platform 71 coincides with the swing axis of the cutting box 93, and the rotation plane of the saw blade 83 (or the rotation plane of the biting teeth of the saw blade 83) coincides with the swing axis of the cutting box 93, when the saw blade groove 938 swings relative to the cutting platform 71, the projection of the cutting groove 711 and the projection of the saw blade groove 938 intersect at all times when viewed along the swing axis of the cutting box 93, the saw blade groove 938 and the saw blade groove 938 are located at any deflection angle, the saw blade groove 938 is located at a position corresponding to the matching position of the cutting groove 711, and the saw blade 83 can continue to extend into the cutting groove 711 after passing through the saw blade groove 938.

The hollow rotating shaft 936 is connected below the rear end of the box bottom frame 930 and extends to the outer side of the rear retainer 923, the hollow rotating shaft 936 is rotatably sleeved in a deep groove ball bearing of the first bearing hole 9236 on the rear supporting plate 65, the rotating axis of the hollow rotating shaft 936 is also the swinging axis of the cutting box 93, that is, the hollow rotating shaft 936 defines the swinging axis of the cutting box 93.

Chassis bottom 937 links up aslope and is in the below of case chassis 930, arrange low back high place before chassis bottom 937 preceding trunnion ring 921, well trunnion ring 922 and back trunnion ring 923 the inboard, the front end of chassis bottom 937 is fixed on preceding trunnion ring 921, the rear end of chassis bottom 937 is fixed on back trunnion ring 923, the position of chassis bottom 937 with saw bit cover 935 spatial position matches and corresponds, the central hole 9360 of hollow rotating shaft 936 forms the discharge passage of work piece cutting sawdust and links up the top space of chassis bottom 937, and the kinetic energy that has when cutting down with self is in along direction b automatic discharge in the central hole 9360.

As shown in fig. 3, 7 and 12, the workpiece cutting device 8 includes a cutting actuator 8a and a feed advancing mechanism 8b that pushes the cutting actuator 8a to feed the workpiece P on the cutting table 71; the cutting executing mechanism 8a comprises a feeding slide seat 80, a cutting support main frame 81, a cutting motor 82, a saw blade 83, a cutting spindle 84, a driving belt pulley 821, a driven belt pulley 841, a belt 822 and a belt cover 812.

Wherein the feed slide 80 is disposed at a high inclination from front to back on the box bottom frame 930 or the box housing within the cutting box body 93, and the cutting support main frame 81 is slidably disposed on the feed slide 80 so as to be movable relative to the cutting box body 93; the arrangement position of the cutting support main frame 80 is adapted to the sliding positioning requirement of the cutting support main frame 81, wherein cutting linear sliding rails 811 obliquely arranged along with the cutting support main frame 80 are arranged at the top and the bottom or at several positions of the top of the left side of the cutting support main frame 81, cutting groove rails 801 obliquely arranged at the front lower part and the rear higher part of the cutting linear sliding rails 811 are arranged on the cutting support main frame 80, the cutting linear sliding rails 811 are slidably sleeved on the cutting groove rails 801, and an oblique included angle of 5-15 degrees to 25 degrees is formed between the oblique running axis of the cutting support main frame 81 and the working table top of the cutting platform 71. The cutting support main frame 81 is provided obliquely, so that the downward impact force of the saw blade 83 can be increased by the weight of the movable portion of the entire cutting actuator 8a, and the feeding of the saw blade 83 in a direction oblique to the work surface of the cutting table 71 is not only fast, but also good in cutting force by moving the saw blade 83 in a direction not parallel to the outer surface of the workpiece P, preferably in a direction close to the diagonal direction of the workpiece P to be cut.

As shown in fig. 12, the cutting motor 82 is installed at a left side portion of a rear portion of the cutting support main frame 81, the cutting main shaft 84 is rotatably installed at a front end of the cutting support main frame 81 through a bearing, shaft portions of both ends of the cutting main shaft 84 extend, the saw blade 83 and the driven pulley 841 are separately installed at shaft portions of both ends of the cutting main shaft 84, the driving pulley 821 is installed at an output shaft of the cutting motor 82, the driving pulley 821 and the driven pulley 841 are both installed at a right side portion of the cutting support main frame 81, and the belt 822 is bridged over the driving pulley 821 and the driven pulley 841; a main frame receiving cavity 810 capable of receiving the belt 822, the driving pulley 821 and the driven pulley 841 is provided on the cutting support main frame 81, an axial end of the cutting spindle 84 where the driven pulley 841 is installed and an output axial end of the cutting motor 82 where the driving pulley 821 is installed respectively extend into the main frame receiving cavity 810, the belt 822, the driving pulley 821 and the driven pulley 841 are received in the main frame receiving cavity 810, and the belt cover 812 is connected to an opening of the main frame receiving cavity 810 to cover the belt 822, the driving pulley 821 and the driven pulley 841 so as to protect them from sawdust.

From a torque transmission perspective, the feed advancing mechanism 8b is disposed between the cutting support main frame 81 and the cutting box body 93 for urging the cutting support main frame 81 to move relative to the cutting box body 93. As shown in fig. 12, the feeding propulsion mechanism 8b includes a feeding driver 8c, a transmission rod 87 drivingly connected to the feeding driver 8c, and a protective cover 89 capable of covering the transmission rod 87, wherein the protective cover 89 is connected to the cutting support main frame 81 and covers the transmission rod 87.

Next, the workpiece cutting device 8 further includes a trigger device provided on the cutting support main frame 81 or the protective cover 89 and a sensor provided at a corresponding position of the cutting box 93, and when the feed actuator 8c drives the cutting support main frame 81 to move, the trigger device also moves and triggers the sensor at an end position. The end position refers to a maximum stroke position at which the cutting support main frame 81 can move, and may be other design stroke positions. The trigger device is used for moving along with the cutting support main frame 81 and providing a trigger signal; and the sensors are provided at corresponding positions on the cutting case 93 at positions adapted to the maximum stroke or other designed stroke that the cutting support main frame 81 can move, for picking up the trigger signal of the trigger device and providing the picked-up signal to a controller or the like. The measurement and control assembly consisting of the trigger device and the sensor provides basic sensing signals for limiting the stroke of the cutting support main frame 81 and the saw blade 83, and provides a plurality of layers of protection for preventing border crossing. As shown in fig. 3, the measurement and control component may be a bump 861 mounted on the top of the protection cover 89 (or the bump 861 may be mounted on the cutting support main frame 81) and a stroke switch 862 mounted at the rear end of the top case housing 934 of the cutting case 93, so that when the feeding driver 8c drives the cutting support main frame 81 and the bump 861, the protection cover 89 and the saw blade 83 mounted thereon to move, the bump 861 triggers the stroke switch 862, which then transmits a triggered signal to the controller, and the controller responds to the triggering signal to control, for example, to force the feeding driver 8c to stop working or move reversely to drive the saw blade 83 to return. An equivalent scheme can also be that the measurement and control assembly can be a magnetic induction block arranged on the cutting support main frame 81 or the protective cover 89 and a magnetic inductor arranged on the cutting box body.

The driving structure of the feed advancing mechanism 8b itself may be various, for example:

in a first configuration, as shown in fig. 12, the feed driver 8c of the feed advancing mechanism 8b is a motor, such as a servo motor, and is connected to the top of the rear end of the cutting support main frame 81 through a transition plate 860, the transmission rod 87 is a lead screw, the transmission rod 87 is arranged parallel to the cutting linear slide 811 and is located above the cutting support main frame 81, the tail end of the transmission rod 87 is in transmission connection with the output shaft end of the feed driver 8c, the feed advancing mechanism 8b further includes a feed lead screw nut seat 88 in screw transmission connection with the lead screw 87, the front end of the transmission rod 87 is sleeved on the threaded hole of the feed lead screw nut seat 88, and the feed lead screw nut seat 88 is connected to the cutting box 81 or the feed slide 80. The protective cover 89 is fixed on the cutting support main frame 81 and covers the feed screw nut seat 88 and the transmission rod 87, so that metal sawdust can be reduced from flying into and damaging the feed screw nut seat 88 and the transmission rod 87.

As shown in fig. 12, the feed driver 8c is a servo motor 85 with a speed reducer 86, the servo motor 85 and the speed reducer 86 are disposed at the top of the rear end of the cutting support main frame 81, and the servo motor 85 is disposed at the rear of the speed reducer 86 and drives the speed reducer 86 to operate; the tail end of the transmission rod 87 is connected to the output shaft of the speed reducer 86 in a transmission manner.

In the structural relationship between the feed actuator 8c and the cutting support frame 81, in another embodiment, the feed actuator 8c may be directly disposed on the feed slide 80 through a front support plate to connect the feed screw nut block 88 to the cutting support frame 81, such that when the feed actuator 8c drives the drive link 87 to rotate, the cutting support frame 81 can be driven to move on the feed slide 80 by the feed screw nut block 88.

In the second configuration, the feeding driver 8c is a pneumatic motor (not shown) disposed on the cutting box 81 or the feeding slide 80, the rear end of the transmission rod 87 is connected to the cylinder rod of the pneumatic motor, and the front end of the transmission rod 87 is connected to the cutting support main frame 81 so as to drag the cutting support main frame 81 to move relative to the cutting box 81 when the cylinder rod of the pneumatic motor moves telescopically.

The swing control process of the cutting box 93 is as follows:

(1) automatic processing is carried out through a set program of the controller, the angle requirement of the cutting surface of the workpiece P is taken as reference, and the cutting angles are respectively set according to the following cutting angles; for example, when the cutting box 93 is swung from a cutting angle of-45 ° to a cutting angle of a basic point cutting position, the basic point cutting positioning mechanism 67 is retracted in advance, and when the cutting box 93 is swung to the basic point cutting position, the movable striking block 677 collides with the second limiting screw 678 of the corresponding cutting positioning plate 675 on the rear retainer ring 923 to tightly push the cutting box 93.

(2) After the cutting angle of the cutting box 93 is determined, the workpiece P is placed on the cutting platform 71 of the workpiece cutting and fixing portion 7, and is swung downward by the pressing-up assembly 74 of the cutting and pressing mechanism 72, and is pressed against the cutting platform 71 from top to bottom, and the workpiece P is pressed against the standing backup plate 931 of the cutting box by the pressing-side assembly 75 of the cutting and pressing mechanism 72 to perform cutting, and the cutting completion and the closing operation can return to the base point cutting position (original point).

(3) If the cutting box 93 is continuously swung to a cutting angle of 45 degrees from the cutting position of the base point before cutting, the swing angle cylinder 9234 firstly retracts to a point, namely, the cutting box is shaken to a cutting angle of-45 degrees (by controlling the on-off time of the electromagnetic air valve corresponding to the swing angle cylinder 9234), at this time, the X-direction slider seat 672 is pushed by the X-direction action cylinder 674 to slide under the control of the controller, the oil pressure buffer 673 and the movable collision block 677 are driven to rapidly move away the rotation track range of the cutting positioning plate 675, the cutting box 93 can be swung to a cutting angle of 45 degrees, when the cutting box 93 is swung to a cutting angle of 45 degrees, the swing angle limiting seat 9237 on the machine head bottom frame 6 is collided with the first limiting screw 9239 on the corresponding swing angle collision block 9238, and the cutting box is reversely matched by the forward pushing force of the swing angle cylinder 9234 and the reverse acting force of the swing angle limiting seat 9237 to pair the cutting box 93 is dead against a cutting angle of 45 degrees; similarly, when the cutting box 93 swings to a cutting angle of-45 °, another set of swing angle limiting seats 9237 on the machine head underframe 6 collides with the first limiting screws 9239 on the corresponding swing angle collision blocks 9238 to be dead against.

(4) The switching process is similar to the process from the +45 DEG cutting angle → the basic point cutting position → -45 DEG cutting angle swing angle; the ± 45 ° is a circle center angle based on the rotation center line of the cutting box 93.

(5) When the swing angle is started every time, the angle positioning clamp 66 is loosened, the swing angle is completed, and the angle positioning clamp 66 is closed to perform 'braking' and clamping auxiliary positioning on the middle supporting ring 922.

In use, the workpiece P is supported by the workpiece support combination of the material support frame 5 and the horizontal material support bracket 13, so that the workpiece P passes through between the height measuring table plate 41 and the height measuring pressing plate 44 of the laser material measuring height device 4 mounted on the material support frame 5, and is pressed on the cutting platform 71 by the side pressing assembly 75 and the upper pressing assembly 74; and starting the height measuring cylinder 45, driving the height measuring pressure plate 44 to press down to tightly press the sectional material workpiece P, and transmitting the height data of the sectional material workpiece P into the controller by the laser height measuring sensor 47. The cutting assembly mechanism 9 is used for adjusting the inclination angle of the workpiece cutting device 8, so that the cutting of the section workpiece can be realized.

As shown in fig. 1 and fig. 2, a shield assembly 14 is respectively disposed on the two cutter heads, and the shield assembly 14 includes a shield rotating shaft seat 141, a shield rotating shaft 142, a shield arm 143, a shield plate 144, a swing hinge lug 145, and a shield cylinder 146 for driving the shield rotating shaft 142 to swing back and forth; the shield arm 143 is arranged on the shield rotating shaft seat 141 through the shield rotating shaft 142 and extends to the upper front part of the horizontal type frame 1, the shield plate 144 is arranged at the end part of the shield arm 143, the shield rotating shaft seat 141 is arranged at the rear top part of the left side of the horizontal type frame 1, the shield rotating shaft 142 is hinged on the shield rotating shaft seat 141 in a manner of rotating back and forth, and the swinging hinge lug 145 is arranged at the rear side of the upper end of the shield rotating shaft 142; the shroud cylinder 146 is also hinged to the shroud pivot seat 141, the tail of the shroud cylinder 146 is rotatably hinged to the rear side of the shroud pivot 142, and the cylinder rod of the shroud cylinder 146 extends upward and is hinged to the swing hinge lug 145.

Referring to fig. 16 to 18, the horizontal material supporting bracket 13 includes a swing arm base 130, a swing arm bottom cover 135, a swing arm rotating shaft 131, a gas spring 132, a gas spring 133, a linear bolt sliding seat 134, a torsion spring 136, a bolt sliding rail 134, a swing arm sliding block 137, a material supporting swing arm 139, a horizontal roller box 13a, a swing arm roller seat 13b, a swing arm roller 13c, a deep groove ball bearing 13d, a swing arm roller 13e, a material stopping roller 13f, and a swing arm positioning flange 13 g.

The material supporting swing arm 139 is rotatably and vertically connected to the side surface of the swing arm base 130 through a swing arm rotating shaft 131 and a deep groove ball bearing 13d, the swing arm base 130 is of a plate-shaped structure, the outer side surface of the swing arm base 130 is a mounting side surface, a swing arm bottom cover 135 covers the inner side surface of the swing arm base 130, a swing arm mounting flange 13j for mounting the material supporting swing arm 139 is arranged at the head end of the swing arm base 130, a swing arm flange 13k matched with the swing arm mounting flange 13j in shape is arranged at the lower part of the material supporting swing arm 139, and a swing arm positioning flange 13g and the swing arm flange 13k are concentrically arranged on the side surface of the material supporting swing arm 139 facing the swing arm; the torsion spring 136 is sleeved on the swing arm rotating shaft 131, one end of the torsion spring 136 is fixed on the swing arm base 130, and the other end of the torsion spring 136 is fixed on the material supporting swing arm 139.

Be equipped with the V-arrangement locating hole 13i of indent on the circumference of swing arm positioning flange 13g, the afterbody setting of air spring 133 is in the rear portion of swing arm base 130, wedge bolt 138 face towards swing arm positioning flange 13g sets up the flexible end of air spring 133, and linear bolt slide 134 sets up swing arm base 130 side, swing arm slider 137 slidable ground sets up on the linear bolt slide 134, swing arm slider 137 front end is equipped with the wedge bolt 138 that matches with V-arrangement locating hole 13 i.

The head end of the swing arm roller seat 13b is vertically connected to the upper end of the material supporting swing arm 139, the tail end of the swing arm roller seat is suspended and extends to the side of the material supporting swing arm 139, the swing arm roller 13e is rotatably pivoted on the swing arm roller seat 13b, the swing arm roller 13e is parallel to the swing arm roller seat 13b, the material blocking roller 13f is sleeved at the tail of the swing arm roller 13e, the number of the swing arm rollers 13c is 2, and the swing arm rollers 13c are rotatably arranged above the head end of the swing arm roller seat 13b in the front-back sequence.

Secondly, a horizontal roller box 13a is arranged at the lower bottom of the swing arm roller 13c, the horizontal roller box 13a is an L-shaped sheet metal part, and one side of the horizontal roller box 13a is fixed on the upper side surface of the material supporting swing arm 139.

The working principle and the working process of the horizontal material supporting bracket 13 are as follows:

(1) the original state of the material supporting swing arm 139 of the horizontal material supporting bracket 13 is a vertical state, at this time, the torsion spring 136 still has residual torsion, and when the material supporting swing arm 139 is vertical, the wedge-shaped bolt 138 is pushed by the gas spring 133 to be inserted into the V-shaped positioning opening 13i of the swing arm positioning flange 13g for positioning, so that the horizontal material supporting bracket 13 is kept in the vertical state;

(2) when the material supporting frame 5 arranged on the movable cutting unit 3 in the double-head saw frame moves to the position above the horizontal material supporting bracket 13, the swing arm pressing wheel 56 arranged on the material supporting frame 5 rolls along the swing arm roller 13c on the side surface and the top of the material supporting swing arm 139 and presses down the material supporting swing arm 139, at the moment, the torsion of the torsion spring 136 is increased, and the wedge-shaped bolt 138 is separated from the V-shaped positioning opening 13i of the swing arm positioning flange 13 g. The swing arm pinch roller 56 is connected to the material rack, and the material rack is connected to the movable right machine head;

(3) when the swing arm pressing wheel 56 on the material supporting frame 5 is gradually separated in a reverse direction, under the action of the torsion force of the torsion spring 136, the side surface of the material supporting swing arm 139 and the top swing arm roller 13c rebound along the swing arm pressing wheel 56, the material supporting swing arm 139 gradually rises and returns to the original position, the torsion force of the torsion spring is reduced, when the material supporting swing arm is in a completely vertical state, the residual torsion force of the torsion spring 136 overcomes the thrust force of the air spring 133, the wedge-shaped bolt 138 is inserted into the positioning V-shaped positioning opening 13i of the swing arm positioning flange 13g, and the horizontal material;

(4) when the material supporting swing arm 139 is completely laid down, if the movable cutting unit 3 continues to move in the original direction, the longitudinal beam 55 (with swing arm pinch rollers 56 at both ends) below the material rack keeps pressing the swing arm roller 13c at the top of the material supporting swing arm 139, so that the horizontal material supporting bracket 13 keeps the horizontal posture.

As shown in fig. 15, the material height measuring device 4 is a laser material height measuring device, and the material height measuring device 4 includes a laser height measuring assembly 46, a height measuring base 40, a height measuring table plate 41, a height measuring auxiliary backup plate 42, a height measuring housing 43, a height measuring pressure plate 44, and a height measuring cylinder 45; wherein the height measuring housing 43 is vertically arranged, the bottom end thereof is jointed with the height measuring base 40, the laser height measuring component 46 is arranged at the upper part of the height measuring housing 43, the height measuring working table plate 41 which is used as a reference plane of a measuring workpiece P is arranged at the top of the height measuring base 40, and the height measuring working table plate 41 is horizontally aligned with the upper surface of the cutting platform 71 in height; the height-measuring auxiliary backup plate 42 is vertically arranged on the front side of the height-measuring shell frame 43, and the bottom of the height-measuring auxiliary backup plate 42 is vertically connected with the rear side of the height-measuring working table plate 41; the height measurement device is characterized in that a height measurement longitudinal groove 421 which is vertically communicated and used for the height measurement pressure plate 44 to move up and down is formed in the front side of the height measurement shell frame 43, a height measurement linear slide rail 422 and a height measurement slide block 423 are arranged in the height measurement shell frame 43, the height measurement linear slide rail 422 is fixed on the back side of the height measurement auxiliary backup plate 42, a pressure plate mounting seat 424 is arranged on the height measurement slide block 423, the tail part of the height measurement pressure plate 44 penetrates through the height measurement longitudinal groove 421 and is connected to the pressure plate mounting seat 424, the plate body of the height measurement pressure plate 44 is suspended and extends out of the upper part of the height measurement working platform plate 41, and the height measurement pressure plate 44 and the height measurement working platform plate 41 are combined up and down to form an up-. The height measuring cylinder 45 is arranged on the height measuring base 40, and a cylinder rod of the height measuring cylinder 45 extends into the height measuring shell frame 43 from the lower direction of the height measuring working platform plate 41 and is connected with the pressure plate mounting seat 424, so that the cylinder rod of the height measuring cylinder 45 pushes the height measuring pressure plate 44 to move up and down under the control of the controller.

The laser height measuring assembly 46 comprises a laser height measuring sensor 47 and a laser signal controller 48, the laser height measuring sensor 47 and the laser signal controller 48 are arranged on the upper portion of the height measuring shell frame 43, and the laser height measuring sensor 47 is arranged right above the height measuring pressure plate 44. The height measuring working table plate 41 is used for placing a workpiece section bar P and determining one side edge positioning position of the section bar P, the height measuring auxiliary backup plate 42 is used for enabling the section bar to be abutted from the front to the back, the height measuring working table plate 41 and the height measuring auxiliary backup plate 42 are arranged at an angle of 90 degrees, and the height measuring shell frame 43 is used for positioning the height measuring working table plate 41 and the height measuring auxiliary backup plate 42; the height-measuring pressure plate 44 is provided with an inclined pressure plate upper surface 440, and the laser height-measuring sensor 47 is positioned above the pressure plate upper surface 440 and used for transmitting laser signals to the pressure plate upper surface 440, receiving the laser signals reflected by the pressure plate upper surface 440 and providing the induced reflected signals to the laser signal controller 48; when in measurement, a workpiece profile P with any cross section shape is placed on the height measurement workbench plate 41, the controller controls the cylinder rod of the height measurement cylinder 45 to move downwards so as to drag the height measurement pressure plate 44 to move downwards and abut against the upper surface of the workpiece profile P, the controller controls the laser height measurement sensor 47 to emit laser signals and receive the laser signals reflected by the upper surface 440 of the pressure plate, and a triangular array for signal transmission and sampling is formed among the laser emitting point, the laser receiving point and the upper surface 440 of the pressure plate of the laser height measurement sensor 47; the laser signal controller 48 responds to the signal transmitted by the laser height measuring sensor 47 and calculates the height of the profile workpiece P below the height measuring pressure plate 44 and further provides the height to the controller. The height of the workpiece P with any shape can be measured by the action that the height measuring pressure plate 44 moves downwards to abut against the upper surface of the workpiece profile P, and then the scheme that the upper surface 440 of the plate receives and reflects laser signals to directly irradiate the profile surface instead of laser is adopted, so that the application range, the measuring work efficiency and the accuracy of a measuring object are obviously and greatly improved. A wireless signal communication unit may be provided in the laser signal controller 48 and sent to the controller via the wireless signal communication unit.

Claims

1. The cutting machine head positioning structure comprises a machine head underframe, a cutting box body arranged on the machine head underframe in a swinging mode and a workpiece cutting device arranged on the cutting box body, wherein the workpiece cutting device comprises a cutting motor capable of driving a saw blade to rotate; the cutting box body is characterized by comprising a box bottom frame, a rear supporting ring which is arranged at the lower part of the box bottom frame and is of a semicircular structure, an auxiliary ring is fixedly connected to the side edge of the rear supporting ring, the cutting box body also comprises two swing angle collision blocks which are respectively arranged at the left side and the right side of the auxiliary ring, and a swing angle limiting seat which is adaptive to the two swing angle collision blocks is arranged on the machine head bottom frame; when the cutting box body swings clockwise or anticlockwise, the swing angle collision blocks at two different angle positions on the cutting box body can respectively touch the corresponding swing angle limiting seats; the cutting box is characterized by further comprising a swing angle driver, the swing angle driver is mounted on the machine head underframe, an output shaft of the swing angle driver is connected to the cutting box body, so that when the swing angle driver works, the output shaft of the swing angle driver can push the cutting box body to swing in a clockwise or anticlockwise direction, the cutting box body and the saw blade on the cutting box body stop swinging under the action of thrust of the output shaft of the swing angle driver and counter-braking force of the swing angle limiting seat, and the swing angle driver is limited at the positive and negative deflection positions.

2. The cutting machine head positioning structure according to claim 1, wherein the swing angle collision block and the swing angle limiting seat are matched at a position capable of limiting the cutting box body to be positioned in a swing range of ± 45 °.

3. The cutting machine head positioning structure according to claim 1 or 2, wherein a base point positioning groove is provided at a front side of a circumferential lowest point position of the rear backing ring, and further comprising a cutting positioning plate connected to the auxiliary ring, a front end of the cutting positioning plate extending into the base point positioning groove and continuing to extend outward; a base point cutting and positioning mechanism which is matched with the cutting and positioning plate is arranged on the machine head underframe and comprises an X-direction linear guide rail, an X-direction sliding block seat, an oil pressure buffer, an X-direction action cylinder, a sliding block push plate and a movable collision block; the X-direction linear guide rail is arranged on the machine head underframe, the X-direction slider seat is slidably arranged on the X-direction linear guide rail, the slider push plate is connected to the X-direction slider seat, the X-direction action cylinder is arranged on the machine head underframe and positioned outside the X-direction linear guide rail, and the push rod of the X-direction action cylinder is connected to the slider push plate so as to push the X-direction slider seat to slide on the X-direction linear guide rail by means of the slider push plate; the movable collision block is arranged on the X-direction slider seat and located on the swinging stroke of the lower position of the cutting positioning plate, the oil pressure buffer is arranged on the movable collision block and located on the swinging stroke of the upper position of the cutting positioning plate, when the rear backing ring on the cutting box body drives the cutting positioning plate to swing to the lowest point position, the oil pressure buffer is firstly contacted with the upper position of the cutting positioning plate to buffer and reduce the descending swinging speed and kinetic energy of the cutting positioning plate, and then the movable collision block is contacted with the lower position of the cutting positioning plate, so that the cutting box body stops swinging and is limited at the lowest point position under the action of the thrust of the output shaft of the swing angle driver and the reverse thrust of the movable collision block.

4. The cutting machine head positioning structure according to claim 1 or 2, wherein the machine head chassis further comprises a rear supporting plate vertically arranged, the rear supporting plate is fixedly connected to the rear end of the machine head chassis, and the rear end of the cutting box body is rotatably connected to the rear supporting plate through a connecting shaft horizontally arranged; the front end of the lower part of the box underframe is provided with a front supporting ring in a semicircular structure, the rear supporting ring is positioned between the front supporting ring and the rear supporting plate, the machine head underframe is provided with a supporting wheel adjusting seat, the supporting wheel adjusting seat supports the front supporting ring but does not obstruct the swing of the cutting box body, and the rear supporting plate and the supporting wheel adjusting seat are matched to form support for the front end and the rear end of the cutting box body.

5. The cutting machine head positioning structure according to claim 4, wherein a middle supporting ring in a semicircular structure is further arranged at the lower part of the box underframe and is positioned between the front supporting ring and the rear supporting ring, an angle positioning clamp is arranged on the machine head underframe and comprises two clamping arms, and the two clamping arms are respectively arranged at two sides of the lower surface of the middle supporting ring.

6. The cutter head positioning structure as claimed in claim 4, wherein said cutter case body includes a bottom frame bottom cover which is obliquely engaged below said case bottom frame, said coupling shaft is a hollow rotary shaft having a central hole which forms a discharge passage of the cutting sawdust of the workpiece and engages an upper space of said bottom frame cover.

7. The cutter head positioning structure of claim 4, wherein the cutting box further comprises a swing angle hinge shaft, and an output shaft of the swing angle driver is in transmission connection with the swing angle hinge shaft so as to push the cutting box to swing in a clockwise or counterclockwise direction through the swing angle hinge shaft.

8. The cutter head positioning structure according to claim 7, wherein the pivot angle driver is rotatably mounted to the rear support plate through a pivot base.

9. A cutter head comprising a cutter head positioning structure according to any one of claims 1 to 8; the fixed part of work piece is fixed during still including the cutting, work piece cutting fixed part sets up the front portion of aircraft nose chassis, work piece cutting fixed part includes cutting platform, the front portion of aircraft nose chassis is provided with preceding backup pad, cutting platform passes through preceding backup pad sets up on the aircraft nose chassis, the cutting box is located cutting platform's rear side, the last cutting groove that supplies the saw bit to stretch into that is provided with of cutting platform, cutting groove is located on the swing axis of cutting box, cutting platform's upper surface with the swing axis coincidence of cutting box.

10. The cutting head according to claim 9, wherein the cutting box further comprises an upright backup plate for assisting in positioning the workpiece, the upright backup plate is located at the front side of the cutting box and positioned on the box bottom frame, the upright backup plate is located at the rear side edge of the cutting platform, a saw blade slot for extending the saw blade is arranged on the upright backup plate, and the saw blade slot is located at a position corresponding to the cutting slot, so that the saw blade can pass through the saw blade slot and then continue to extend into the cutting slot no matter the saw blade is at any deflection angle.