CN114770675B

CN114770675B - Middle plate splicing machine with three-section type cutter

Info

Publication number: CN114770675B
Application number: CN202210553494.0A
Authority: CN
Inventors: 许青荣
Original assignee: Hengyang Jiaxing Wood Industry Co ltd
Current assignee: Hengyang Jiaxing Wood Industry Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-12-13
Anticipated expiration: 2041-05-10
Also published as: CN113400425A; CN114770675A; CN113400425B

Abstract

The invention provides a middle plate splicing machine with a three-section type cutter, which comprises: the plate splicing device comprises a feeding device, a plate splicing device and a plate collecting device, wherein a material receiving platform is arranged at the front end of the plate splicing device; the loading attachment includes: the material bin is used for storing the material plates; the material taking mechanism is used for grabbing the material plate from the upper part of the material bin and placing the material plate on the material receiving platform, the material taking mechanism comprises a rack and a sucker assembly arranged on the rack, the sucker assembly at least has two degrees of freedom, and the sucker assembly can move along the vertical direction and the front-back direction. The middle plate splicing machine with the three-section type cutter can automatically feed, prevent the wood plate from cracking caused by manual feeding, and improve the product quality.

Description

Middle plate splicing machine with three-section type cutter

The application is a divisional application of an invention patent application with the application number of 202110504379X and the application date of 2021, 05 and 10 months in 2021, entitled "middle plate splicing machine".

Technical Field

The invention belongs to the field of multilayer board processing, and particularly relates to a medium board splicing machine with a three-section type cutter.

Background

The multilayer board, also called plywood, is one of the common materials for furniture, and is a three-layer or multilayer plate-shaped material formed by rotary cutting a wood segment into a single board or slicing a wood beam into thin wood boards and gluing the thin wood boards by using an adhesive, and is usually formed by gluing odd layers of single boards and mutually vertical fiber directions of the single boards of adjacent layers. The plywood can improve the utilization rate of the wood and is a main way for saving the wood.

The middle plate splicing machine is important equipment for producing plywood, the traditional middle plate splicing machine needs manual feeding, and workers grab edges of the material taking plate in the feeding process, so that the stress of the plate is uneven, the material plate is easy to break, and the quality of the plate is reduced; meanwhile, in a shearing mechanism on the middle plate splicing machine, the cutter is generally linear, the front notch and the rear notch of the sheared material plate are parallel straight lines, the middle plate after the splicing cannot bear bending stress at the notch, the notch is easy to fold, the quality of the final plywood is influenced, and the middle plate is easy to break at the joint of the middle plate.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a middle plate splicing machine with a three-section type cutter, which can automatically feed materials, prevent wood plates from cracking caused by manual feeding and further improve the product quality.

The invention provides a cutter with three-section type, comprising: the plate splicing device comprises a feeding device, a plate splicing device and a plate collecting device, wherein a material receiving platform is arranged at the front end of the plate splicing device;

the loading attachment includes: the material taking mechanism is used for storing the material plates;

the material taking mechanism is used for grabbing a material plate from the upper part of the storage bin and placing the material plate on the material receiving platform, the material taking mechanism comprises a rack and a sucker assembly arranged on the rack, and the sucker assembly at least has two degrees of freedom and can move along the vertical direction and the front-back direction;

the plate splicing device is provided with a shearing mechanism for shearing the head and the tail of the material plate before butt joint of the spliced plates; the shearing mechanism comprises a lifting platform and a cutter, and the cutter is arranged on the lifting platform; the cross section of the cutting knife is in a sawtooth shape, so that the seam of the middle plate is in a sawtooth shape;

the cutting knife is of a three-section type, two ends of the cutting knife in the width direction are straight line parts, the straight line parts are single-layer blades, and the middle of the cutting knife is a sawtooth part; the sawtooth part is a double-layer blade which is arranged at intervals along the front and back direction and is respectively a front blade and a back blade; the distance between the front edge and the rear edge along the front-rear direction is 2-5 mm;

an accommodating part is formed between the double-layer blades of the sawtooth part, a pressing plate is arranged in the accommodating part, and a compression spring is arranged between the pressing plate and the upper wall of the accommodating part. When the cutter rises upwards, the abutting plate moves downwards relative to the cutter and extends out of the lower end of the accommodating part, and sawdust formed by the cutting material plate is pushed out of the accommodating part;

the front edge and the rear edge of the blade are respectively provided with a pressing block, the pressing block is of a three-section structure consistent with the blade and is attached to the outer surface of the blade, the pressing block is connected with the lifting platform through a compression spring, when the lifting platform descends to cut the flitch, the pressing block is pressed on the upper surface of the flitch under the action of the compression spring and is matched with a support plate supported on the upper surface of the flitch and a lining plate below the flitch to clamp the flitch at the front end and the rear end of the cutter edge, and a cutter gap is formed in the lining plate.

The working principle of the three-section type cutter provided by the invention is as follows: when the materials are taken, the sucker component moves to the upper part of the storage bin along the front-back direction and then moves downwards, so that the material plate is sucked; after sucking the flitch, the sucking disc subassembly rises to the assigned position to move forward and connect material bench side, place the flitch and connect the material bench, in the mechanism of shearing, the cross section of cutter is the cockscomb structure, thereby makes the seam of medium plate be the cockscomb structure.

The beneficial effects of the invention are as follows: the material plate is sucked by the material taking mechanism, so that the damage of the material plate caused by manual operation can be effectively prevented, and the quality of the plate is improved; the seam of medium plate is the cockscomb structure, has strengthened the bearing performance of the bending stress of seam department medium plate, and follow-up multiply wood is glued the infiltration medium plate seam after the encapsulating pressfitting, makes the seam glue firmly to panel through upper and lower both sides compresses tightly the seam, further improves crooked bearing performance, improves the quality of plywood.

According to an embodiment provided by the invention, the storage bin comprises a slide rail, a supporting plate and a driving device, wherein the slide rail is arranged along the vertical direction, the supporting plate is arranged on the slide rail in a sliding manner, the supporting plate is used for placing a material plate, and the driving device can drive the supporting plate to move upwards;

the upper end of the bin is provided with a first material sensor used for sensing whether the flitch reaches the feeding height, and if the flitch does not reach the feeding height, the driving device acts to drive the supporting plate to move upwards.

According to an embodiment provided by the present invention, a second material sensor is further disposed at an upper end of the storage bin, and the second material sensor is located above the first material sensor and is configured to detect whether the flitch reaches a dangerous height, if the flitch reaches the dangerous height, the driving device is activated to drive the supporting plate to move downward.

According to an embodiment provided by the invention, the supporting plate is provided with a travel switch, and the material plate placed on the supporting plate can trigger the travel switch to detect whether the material plate exists on the supporting plate.

According to an embodiment of the present invention, the supporting plate is a net structure.

According to an embodiment provided by the invention, the plurality of bins are arranged side by side along the width direction and can move along the width direction.

According to an embodiment provided by the invention, the sucker assembly comprises a plurality of suckers and a base, the base is arranged on the rack and can move in the front-back direction and the vertical direction, and the suckers are uniformly arranged at the lower end of the base;

each sucker is provided with a tension sensor and a controllable air valve, the tension sensor is used for detecting the tension of the sucker on the material plate, and the air valve is arranged at an air supply port of the sucker; the controller can respectively control the opening and closing of the air valve of each sucker, the air valve is always in an open state, so that the suckers are communicated with the vacuum pump,

when the flitch that is located the upper strata is less than lower floor's flitch, partial sucking disc adsorbs on lower floor's flitch, grabs two flitchs simultaneously, and the controller cuts off the adsorption affinity of the sucking disc that adsorbs on lower floor's flitch, and control method is as follows: when the pulling force of the sucking disc on the material plate exceeds a pulling force threshold value, the controller closes the air valve of the sucking disc to cut off the adsorption force, wherein the pulling force threshold value = a safety factor, standard material plate weight and the number of the sucking discs, the standard material plate is the material plate with the same area as the supporting plate, and the safety factor is not less than 2 and not more than 4.5;

the safety factor is calculated as follows: abstract the flitch as the material pole, evenly divide into S on the material pole, correspond S sucking discs, every share weight is m, after n sucking discs 221 that are located the edge drop, the adjacent n +1 th sucking disc 221 bears the biggest pulling force, n +1 th sucking disc 221 exists n parts material pole apart from the edge at least, use n +2 sucking disc 221 as the fulcrum, according to moment balance formula, the pulling force that n +1 th sucking disc 221 bore is (n + 1) 2 · m/2 at least, so when 1 sucking disc drops, the pulling force is 2m at least, when 2 sucking discs drop, the pulling force is 4.5m at least, consequently, factor of safety is more than or equal to 2, simultaneously, in order to prevent 2 sucking discs that drop still miss the condition of examining, factor of safety is less than or equal to 4.5.

According to an embodiment of the present invention, the lower surface of the base is in a shape consistent with the upper surface of the supporting plate, and when the base moves the material suction plate downwards, the plurality of suction cups are uniformly distributed above the supporting plate.

According to an embodiment of the present invention, the plurality of suckers are distributed in a matrix, and the number of rows and the number of columns are at least 3.

According to one embodiment provided by the invention, the material taking mechanism further comprises a vacuum pump and a controller, and each sucker is connected with the vacuum pump through a pipeline; the controller is used for controlling the vacuum pump, when the material taking mechanism takes materials from the material bin, the vacuum pump operates in the forward direction to provide adsorption force for the sucker, and when the material taking mechanism moves the material plate to the material placing position, the vacuum pump operates in the reverse direction, and the sucker reversely blows to quickly release the material plate.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of a mid-plate splicer with a three-segment cutter according to one embodiment;

FIG. 2 is a schematic structural diagram of a feeding device;

FIG. 3 is a schematic structural view of another view angle of the feeding device;

FIG. 4 is a schematic structural diagram of the feeding device during material taking;

FIG. 5 is a schematic structural view of a cutter in a shearing mechanism of the plate splicing device;

FIG. 6 is a schematic view of a splice joint;

fig. 7 is a mechanism diagram of another perspective of the shearing mechanism of the panel splicing device.

Description of the reference numerals

10-a storage bin, 11-a slide rail, 12-a supporting plate, 131-a first material sensor, 132-a second material sensor, 21-a rack, 22-a sucker component, 221-a sucker, 222-a base, 223-a cylinder, 224-a sliding block, 23-a material receiving table, 31-a front edge, 32-a rear edge, 33-a resisting plate, 34-a pressing block, 35-a lining plate, S1-a feeding device, S2-a plate splicing device and S3-a plate receiving device.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Example 1

Referring to fig. 1 to 6, the middle plate splicing machine with a three-section type cutter according to the present embodiment includes: loading attachment S1, makeup device S2 and board receiving device S3, the front end of makeup device S2 is equipped with material receiving platform 23. The feeding device S1 includes: feed bin 10 and feeding agencies, feed bin 10 is used for depositing the flitch. The material taking mechanism is used for grabbing material plates from the upper part of the stock bin 10 and placing the material plates on the material receiving platform 23, the material taking mechanism comprises a rack 21 and a sucker component 22 arranged on the rack 21, and the sucker component 22 at least has two degrees of freedom and can move along the vertical direction and the front-back direction.

When material is taken, the sucker assembly 22 moves to the upper part of the storage bin 10 along the front-back direction and then moves downwards, so that a material plate is sucked; after sucking the flitch, sucking the sucking disc subassembly 22 and rise to the assigned position to move forward and connect material platform 23 top, place the flitch on connecing material platform 23. The material plate is sucked through the material taking mechanism, so that the material plate damage caused by manual operation can be effectively prevented, and the quality of the plate is improved.

Referring to fig. 2, the storage bin 10 includes a slide rail 11, a supporting plate 12 and a driving device, the slide rail 11 is disposed along a vertical direction, the supporting plate 12 is slidably disposed on the slide rail 11, the supporting plate 12 is used for placing a material plate, and the driving device can drive the supporting plate 12 to move upwards.

The upper end of the silo 10 is provided with a first material sensor 131 for sensing whether the flitch reaches the loading height, and if the flitch does not reach the loading height, the driving device acts to drive the support plate 12 to move upwards. First material sensor 131 is photoelectric switch, in other embodiments, also can be proximity switch, travel switch etc. detects the flitch through first material sensor 131, can make the flitch of the superiors be in and predetermine the height, makes things convenient for sucking disc subassembly 22 to snatch the flitch, effectively utilizes the vertical space of feed bin 10 simultaneously, improves the board volume of storing up.

The upper end of the storage bin 10 is further provided with a second material sensor 132, the second material sensor 132 is located above the first material sensor 131, and is used for detecting whether the flitch reaches a dangerous height, if the flitch reaches the dangerous height, the driving device acts to drive the supporting plate 12 to move downwards. When the material is too high, the sucker assembly 22 will impact the material when moving horizontally, and in severe cases, the equipment will be damaged. The second material sensor 132 can effectively prevent the material from being over-height, thereby improving the safety of the equipment. Further, the silo 10 is provided with an alarm, and when the pallet 12 is at the lowest position and the material is at a dangerous height, an alarm is given through the alarm.

Wherein, layer board 12 is equipped with travel switch, and the flitch of placing on layer board 12 can trigger travel switch for whether there is the flitch on detecting layer board 12. When the bin 10 is detected to be empty, material taking is stopped.

Specifically, the pallet 12 is a mesh structure. Because the flitch shape of making the medium plate is not of uniform size, when the material was less on layer board 12, the partial position of layer board 12 was exposed, when getting the material, sucking disc 221 probably contacted layer board 12, when layer board 12 was dull and stereotyped structure, sucking disc subassembly 22 probably adsorbed on layer board 12, caused equipment to damage easily during the action of making progress, in this embodiment, layer board 12 is network structure, has densely covered aperture, can prevent that sucking disc 221 of sucking disc subassembly 22 from inhaling on layer board 12, causes equipment to damage.

More specifically, the suction cup assembly 22 includes a plurality of suction cups 221 and a base 222, the base 222 is disposed on the frame 21 and can move in the front-rear direction and the vertical direction, and the plurality of suction cups 221 are uniformly disposed at the lower end of the base 222. The base 222 is disposed on the slider 224 through the cylinder 223 and can move in a vertical direction relative to the slider 224, and the slider 224 is disposed on the frame 21 and can move in a front-back direction, thereby providing two degrees of freedom in the front-back direction and the vertical direction for the chuck assembly 22.

The lower surface of the base 222 is in conformity with the upper surface of the pallet 12, and when the base 222 moves down to suck the material plate, the plurality of suction cups 221 are uniformly distributed above the pallet 12. A plurality of sucking disc subassemblies 22 evenly distributed, when snatching the flitch, every sucking disc 221 atress all with, the pulling force that the flitch received is the same, prevents that flitch local stress is too big, causes the flitch damaged.

More specifically, the plurality of suction cups 221 are distributed in a matrix, and the number of rows and the number of columns are at least 3. The flitch is usually rectangular, and the matrix distribution of the suction cups 221 can ensure that the suction cups 221 are uniformly distributed on the flitch to the maximum extent. Meanwhile, due to the fact that the flitches are different in size, the number of rows and the number of columns are more than 3, matrix distribution can guarantee that each flitch can be provided with a plurality of suckers 221 to correspond to each other, and the suckers 221 are 4X4 matrixes in the embodiment.

Furthermore, the material taking mechanism further comprises a vacuum pump and a controller, and each suction cup 221 is connected with the vacuum pump through a pipeline; the controller is used for controlling the vacuum pump, when the material taking mechanism takes materials from the storage bin 10, the vacuum pump operates in the forward direction to provide adsorption force for the suction disc 221, when the material taking mechanism moves the material plate to the material placing position, the vacuum pump operates in the reverse direction, and the suction disc 221 reversely blows to quickly release the material plate. The controller controls the vacuum pump, so that the no-load loss of the suction cup 221 can be reduced, materials can be quickly released through back blowing, and the efficiency is improved.

More specifically, each suction cup 221 is provided with a tension sensor and a controllable air valve, the tension sensor is used for detecting the tension of the suction cup 221 on the flitch, and the air valve is arranged at an air supply port of the suction cup 221; the controller can respectively control the opening and closing of the air valve of each suction cup 221, the air valve is always in an open state, the suction cups 221 are communicated with the vacuum pump, and when the pulling force of the suction cups 221 on the flitch exceeds a pulling force threshold value, the controller closes the air valves corresponding to the suction cups 221 to cut off the adsorption force corresponding to the suction cups 221. Referring to fig. 4, because the flitch is not of uniform size, when the flitch that is located the upper strata is less than lower floor's flitch, when getting the material, partial sucking disc can adsorb on lower floor's flitch, grabs two flitchs simultaneously, influences follow-up makeup process. In this embodiment, the suction cup is provided with the tension sensor and the air valves, the controller controls the action of each air valve, and when the tension on the suction cup 221 is greater than a threshold value, the air valves are closed, so as to cut off the negative pressure of the vacuum pump on the corresponding suction cup 221. Because the flitch that is located the lower floor receives sheltering from of upper material board, only expose outside the face have sucking disc 221 to adsorb, the whole atress of lower floor's flitch is inhomogeneous, and the sucking disc number on the unit area is not enough, leads to necessarily to have the pulling force that 1 at least sucking disc received to be greater than the pulling force threshold value of settlement to make the sucking disc 221 who adsorbs lower floor's flitch break away from the flitch in proper order. The tension threshold = safety factor · weight of standard flitch/number of suckers 221, the standard flitch is a flitch with the same area as the support plate 12.

The safety factor is calculated as follows: abstracting a flitch into a material rod, evenly dividing the flitch into S parts on the material rod, corresponding to S suckers, wherein each part is m in weight, after n suckers 221 positioned at the edge fall off, the n +1 th sucker 221 adjacent to the flitch bears the maximum tension, the n +1 th sucker 221 at least has n parts of the material rod away from the edge, the n +2 th sucker 221 is taken as a fulcrum, and according to a moment balance formula, the n +1 th sucker 221 bears the tension at least as (n + 1) ² ·m/2。

Therefore, when 1 sucker falls off, the pulling force is at least 2m, and when 2 suckers fall off, the pulling force is at least 4.5m.

Therefore, factor of safety should be more than or equal to 2, simultaneously, in order to prevent 2 sucking discs that drop still to miss the condition of examining, factor of safety should be less than or equal to 4.5, in order to prevent in this embodiment to slightly rock and lead to the pulling force of individuality sucking disc 221 to reach 2m by accident, factor of safety gets 3.

Referring to fig. 3, the magazine 10 is provided in plurality, arranged side by side in the width direction, and movable in the width direction. When one of the bins 10 is at the material loading level, the other bins 10 are at the material waiting level, and can be used for filling the material filling plates into the bins 10 at the material waiting level, and when the bins 10 at the material loading level are empty, the bins 10 act to switch the bins 10 at the material loading level to the material loading level, so that continuous operation of the equipment is ensured. In this embodiment, there are two bins 10.

More specifically, the plate splicing device S2 is provided with a shearing mechanism for shearing the head and the tail of the material plate before the butt joint of the spliced plates. Shearing mechanism includes elevating platform and cutter, and the cutter setting is on the elevating platform, and present cutter is the linear type usually, and the incision is parallel straight line around the flitch after cuting, and the middle plate behind the makeup can't bear bending stress in incision department, folds along the incision easily, still influences the quality of final plywood simultaneously, easily at the seam crossing fracture of middle plate.

In order to solve the above problems, in this embodiment, referring to fig. 5 to 7, the cross section of the cutting knife is serrated, so that the seam of the middle plate is serrated, thereby enhancing the bending stress bearing performance of the middle plate at the seam, after the subsequent multi-layer plates are subjected to glue filling and pressing, glue penetrates into the seam of the middle plate, so that the seam is firmly bonded, and the seam is pressed by the plates on the upper and lower sides, thereby further improving the bending stress performance and improving the quality of the plywood.

Referring to fig. 5, the cutter is a three-stage type, and has two ends in the width direction as straight portions, which are single-layer blades, and a middle portion as a serrated portion, which is a double-layer blade arranged at an interval in the front-rear direction and includes a front blade 31 and a rear blade 32. After the boards are spliced, referring to fig. 6, the width of the joint of the middle sawtooth part of the front material plate 001 and the middle sawtooth part of the rear material plate 002 is larger than the width of the joint of the straight line parts at the two ends, so that after the multilayer boards are subjected to glue pouring and laminating, the thickness of the glue layer of the joint sawtooth part reaches a preset value, the glue resultant force is ensured, and the joint is prevented from being glued and affecting the quality of the boards. Specifically, the distance between the front edge 31 and the rear edge 32 in the front-rear direction is 2-5 mm, the glue layer is too thin and easily breaks, and the glue layer is too thick, which may cause the stress performance of the plate to be reduced, and is 3 mm in this embodiment.

Further, referring to fig. 7, a receiving portion is formed between the double-layered blades of the serration portion, a pressing plate 33 is provided in the receiving portion, and a compression spring is provided between the pressing plate 33 and an upper wall of the receiving portion. When the cutter is lifted upwards, the resisting plate 33 moves downwards relative to the cutter and extends out of the lower end of the accommodating part to push the sawdust formed by the cutting plate out of the accommodating part, so that the next shearing effect is guaranteed.

When the end of the flitch is sheared, the notch is easy to crack, and the possibility of cracking of the notch is increased by the serrated blade. In order to solve the problem, in this embodiment, a pressing block 34 is respectively disposed at the front edge and the rear edge of the blade, the pressing block 34 is a three-section structure consistent with the blade and is attached to the outer surface of the blade, and the pressing block 34 is connected to the lifting table through a compression spring. When the lifting platform descends to cut the flitch, the pressing block 34 is pressed on the upper surface of the flitch under the action of the compression spring, and is matched with the supporting plate 33 which is supported on the upper surface of the flitch and the lining plate 35 below the flitch to clamp the flitch at the front end and the rear end of the cutter blade, and the lining plate 35 is provided with a knife gap, so that the cut is neat and is not easy to crack. After the cutter is retracted, the cutting edge is positioned between the two pressing blocks 34, and the cutter is protected.

It is to be noted here that the functions, algorithms, methods, etc. related to the present invention are merely routine adaptations of the prior art. Therefore, the present invention is an improvement of the prior art, and the essential point of the present invention is the connection relationship between hardware, rather than the functions, algorithms and methods themselves, that is, the present invention relates to a single function, algorithm and method, but does not include the improvement of the functions, algorithms and methods itself. The description of the functions, algorithms and methods herein are presented for purposes of illustration and description.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples throughout this specification. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. Medium plate makeup machine with syllogic cutter, its characterized in that includes: the plate splicing device comprises a feeding device (S1), a plate splicing device (S2) and a plate collecting device (S3), wherein a material receiving platform (23) is arranged at the front end of the plate splicing device (S2);

the feeding device (S1) comprises: the material taking device comprises a bin (10) and a material taking mechanism, wherein the bin (10) is used for storing material plates;

the material taking mechanism is used for grabbing a material plate from the upper part of the storage bin (10) and placing the material plate on the material receiving platform (23), the material taking mechanism comprises a rack (21) and a sucker assembly (22) arranged on the rack (21), and the sucker assembly (22) at least has two degrees of freedom and can move along the vertical direction and the front-back direction;

the splicing plate device (S2) is provided with a shearing mechanism used for shearing the head and the tail of the material plate before splicing plate butt joint; the shearing mechanism comprises a lifting platform and a cutter, and the cutter is arranged on the lifting platform; the cross section of the cutter is serrated, so that the seam of the middle plate is serrated;

the cutting knife is of a three-section type, two ends of the cutting knife in the width direction are straight line parts, the straight line parts are single-layer blades, and the middle of the cutting knife is a sawtooth part; the sawtooth part is a double-layer blade which is arranged at intervals along the front and back direction and is respectively a front blade (31) and a back blade (32); the distance between the front edge (31) and the rear edge (32) along the front-rear direction is 2-5 mm;

an accommodating part is formed between the double-layer blades of the sawtooth part, a supporting plate (33) is arranged in the accommodating part, and a compression spring is arranged between the supporting plate (33) and the upper wall of the accommodating part; when the cutter rises upwards, the abutting plate (33) moves downwards relative to the cutter and extends out of the lower end of the accommodating part to push the wood chips formed by the cutting material plate out of the accommodating part;

the front edge and the rear edge of the blade are respectively provided with a pressing block (34), the pressing block (34) is of a three-section structure consistent with the blade and is attached to the outer surface of the blade, the pressing block (34) is connected with the lifting platform through a compression spring, when the lifting platform descends to cut the flitch, the pressing block (34) compresses the upper surface of the flitch under the action of the compression spring, the pressing block is matched with a supporting plate (33) which is supported on the upper surface of the flitch and a lining plate (35) below the flitch to clamp the flitch at the front end and the rear end of the cutting edge, and a knife gap is formed in the lining plate (35).

2. The middle plate splicing machine with the three-section type cutter is characterized in that the stock bin (10) comprises a slide rail (11), a supporting plate (12) and a driving device, wherein the slide rail (11) is arranged along the vertical direction, the supporting plate (12) is arranged on the slide rail (11) in a sliding manner, the supporting plate (12) is used for placing a material plate, and the driving device can drive the supporting plate (12) to move upwards;

the upper end of the storage bin (10) is provided with a first material sensor (131) for sensing whether the material plate reaches the feeding height or not, and if the material plate does not reach the feeding height, the driving device acts to drive the supporting plate (12) to move upwards.

3. The middle plate splicing machine with the three-section type cutter is characterized in that a second material sensor (132) is further arranged at the upper end of the stock bin (10), the second material sensor (132) is positioned above the first material sensor (131) and is used for detecting whether a flitch reaches a dangerous height or not, if the flitch reaches the dangerous height, and the driving device is operated to drive the supporting plate (12) to move downwards.

4. The middle plate splicing machine with a three-section cutter as claimed in claim 2, characterized in that the supporting plate (12) is provided with a travel switch which can be triggered by a material plate placed on the supporting plate (12) for detecting the presence of the material plate on the supporting plate (12).

5. The middle plate splicing machine with three-segment cutter as claimed in claim 2, wherein the supporting plate (12) is a net structure.

6. The medium plate puzzle having a three-stage cutter according to claim 1, wherein the magazine (10) is provided in plurality, arranged side by side in the width direction, and movable in the width direction.

7. The middle plate splicing machine with a three-segment type cutter as claimed in claim 1, wherein the suction cup assembly (22) comprises a plurality of suction cups (221) and a base (222), the base (222) is arranged on the frame (21) and can move in a front-back direction and a vertical direction, and the plurality of suction cups (221) are uniformly arranged at the lower end of the base (222);

each sucker (221) is provided with a tension sensor and a controllable air valve, the tension sensor is used for detecting the tension of the sucker (221) on the material plate, and the air valve is arranged at an air supply port of the sucker (221); the controller can respectively control the opening and closing of the air valve of each sucking disc (221), the air valve is always in an open state, so that the sucking discs (221) are communicated with the vacuum pump,

when the flitch that is located the upper strata is less than lower floor's flitch, partial sucking disc adsorbs on lower floor's flitch, grabs two flitchs simultaneously, and the controller cuts off the adsorption affinity of sucking disc (221) on lower floor's flitch, and the control method is as follows: when the tension of the suction disc (221) on the flitch exceeds a tension threshold value, the controller closes an air valve of the suction disc (221) and cuts off the adsorption force, wherein the tension threshold value = safety coefficient, standard flitch weight and the number of the suction discs (221), the standard flitch is the flitch with the same area as the support plate (12), and the safety coefficient is not less than 2 and not more than 4.5;

the safety factor is calculated as follows: abstract the flitch into the material pole, evenly divide into S on the material pole, correspond S sucking disc (221), every share weight is m, after n sucking disc (221) that are located the edge drop, the (n + 1) th sucking disc (221) adjacent with it bears the biggest pulling force, n + 1) th sucking disc (221) exists n parts material pole at least apart from the edge, regard (n + 2) sucking disc (221) as the fulcrum, according to the moment balance formula, the pulling force that (n + 1) th sucking disc (221) bore is (n + 1) at least ² M/2, so that when 1 sucker (221) falls off, the tensile force is at least 2m, and when 2 suckers (221) fall off, the tensile force is at least 4.5m, so that the safety factor is more than or equal to 2, and meanwhile, in order to prevent the condition that the 2 suckers (221) fall off and are still missed, the safety factor is less than or equal to 4.5.

8. The middle plate splicing machine with a three-segment cutter as claimed in claim 7, wherein the lower surface of the base (222) is formed in conformity with the upper surface of the pallet (12), and a plurality of the suction cups (221) are uniformly distributed above the pallet (12) when the base (222) moves down a suction plate.

9. The mid-plate puzzle machine with three-segment cutter as claimed in claim 7, wherein said plurality of suction cups (221) are distributed in a matrix with at least 3 rows and columns.

10. The middle plate splicing machine with a three-section type cutter as claimed in claim 7, wherein the material taking mechanism further comprises a vacuum pump and a controller, and each suction cup (221) is connected with the vacuum pump through a pipeline; the controller is used for controlling the vacuum pump, when the material taking mechanism takes materials from the stock bin (10), the vacuum pump runs in the forward direction to provide adsorption force for the sucker (221), and when the material taking mechanism moves the material plate to the material placing position, the vacuum pump runs in the reverse direction, and the sucker (221) reversely blows to quickly release the material plate.