Cut-to-length combination saw equipment

Abstract

The invention discloses a fixed-length combined saw device, comprising a mounting platform, on which a roller is mounted, the roller is used for carrying a material to be sawed and driving the material to be sawed to move; a fixed sawing machine is arranged at one end of the mounting platform, and a mobile sawing machine is arranged at the other end of the mounting platform and is slidably connected to a fixed surface; a lifting and positioning device is mounted on the mounting platform at equal intervals, the lifting and positioning device comprises a lifting mechanism and a lifting baffle, the lifting baffle is connected to the lifting mechanism, and is driven by the lifting mechanism to move up and down in a vertical direction; a plurality of detection switches are provided, each detection switch is arranged close to a lifting baffle, the detection switch is used for detecting the position of the material to be sawed and sending the position information to a control system, the control system controls the lifting baffle of the lifting and positioning device to rise, so that the material to be sawed is driven by the roller to make the material head flush under the blocking of the lifting baffle, and then controls the mobile sawing machine to move to compensate for the size of the material to be sawed, so that the tail of the material to be sawed is completely sawed.

Description

Technical Field

[0001] The present disclosure relates to the field of cut-to-length sawing devices, and in particular to a cut-to-length combined sawing device. Background Art

[0002] When sawing materials, it is generally necessary to cut the materials to size. There are two common methods to achieve fixed-size combined sawing. One is to use a vise to clamp the material and feed it hydraulically or servo to achieve the fixed-size. The disadvantage of this method is that when sawing long materials, repeated automatic feeding is required, which will cause large cumulative errors and the overall equipment requires a large space. The other is to use a front-end baffle to achieve positioning. The disadvantage of this method is that the overall equipment requires a large space. Summary of the invention

[0003] The present disclosure provides a fixed-length combination saw device to at least solve one of the technical problems existing in the prior art.

[0004] A fixed-length combined saw device comprises a mounting platform, on which a rotatable roller is mounted, and the roller is used to carry a material to be sawed and drive the material to be sawed to move;

[0005] A fixed sawing machine, which is arranged at one end of the mounting table and is used to saw the head of the material to be sawed on the roller table;

[0006] A mobile sawing machine, which is arranged at the other end of the mounting platform and is slidably connected to the fixed surface, and is used to saw the tail of the material to be sawed on the roller table;

[0007] A lifting and positioning device, wherein a plurality of lifting and positioning devices are provided and are installed on the mounting platform at equal intervals, wherein the lifting and positioning device comprises a lifting mechanism and a lifting baffle, wherein the lifting baffle is connected to the lifting mechanism and is driven by the lifting mechanism to move up and down in the vertical direction to prevent the material to be sawed from moving and to make the head or tail of the material to be sawed flush under the drive of the roller table;

[0008] A detection switch, wherein a plurality of detection switches are provided, each detection switch is arranged near a lifting baffle, and the detection switch is used to detect the position of the material to be sawed and send the position information to the control system. The control system controls the lifting baffle of the lifting and positioning device to rise, so that the material to be sawed is driven by the roller to make the material head flush under the blocking of the lifting baffle, and then controls the mobile sawing machine to move to compensate for the size of the material to be sawed, so that the tail of the material to be sawed is completed.

[0009] In one possible implementation manner, it also includes a grating scale, which includes a main scale and a reading head. The reading head is installed on the mobile sawing machine and is used to follow the movement of the mobile sawing machine. The main scale is installed on the mounting table. The grating scale is used to detect the movement displacement of the mobile sawing machine and output a signal to the control system. The control system controls the displacement of the mobile sawing machine according to the signal.

[0010] In one possible implementation manner, the mobile sawing machine is mounted on a fixed surface via a linear guide rail mechanism, wherein the linear guide rail mechanism comprises a guide rail and a slider matched with the guide rail, and the mobile sawing machine is fixed on the slider.

[0011] In one possible implementation manner, the lifting mechanism includes a second oil cylinder, the second oil cylinder is vertically arranged upward, and an output end of the second oil cylinder is connected to the lifting baffle to drive the lifting baffle to move up and down in the vertical direction.

[0012] In one embodiment, the lifting and positioning device also includes a second guide rod and a second guide sleeve adapted to the second guide rod, the second guide rod is inserted into the second guide sleeve, one end of the second guide rod is connected to the lifting baffle, and when the second oil cylinder drives the lifting baffle to move up and down, the second guide sleeve guides the second guide rod.

[0013] In one embodiment, it also includes a material head leveling mechanism, which is installed on a mounting table close to the fixed sawing machine. The material head leveling mechanism includes a second baffle and a second baffle driving mechanism. The second baffle is connected to the second baffle driving mechanism and is driven by the second baffle driving mechanism to move up and down in the vertical direction to prevent the movement of the material to be sawed and make the material head to be sawed level under the drive of the roller.

[0014] In one embodiment, it also includes a material tail leveling mechanism, which is installed on a workbench and arranged close to the mobile sawing machine. The material tail leveling mechanism includes a first baffle and a first baffle driving mechanism. The first baffle is connected to the first baffle driving mechanism and is driven by the first baffle driving mechanism to move up and down in the vertical direction to prevent the movement of the material to be sawed and to make the tail of the material to be sawed level under the drive of the roller.

[0015] In one possible implementation mode, the material head leveling mechanism also includes a guide rod and a guide sleeve matched with the guide rod, the second baffle driving mechanism is an oil cylinder, the guide rod is inserted into the guide sleeve, one end of the guide rod is connected to the second baffle, and when the oil cylinder drives the second baffle to move up and down, the guide rod moves up and down in the guide sleeve to guide the second baffle.

[0016] In one possible embodiment, the tail leveling mechanism also includes a first guide rod and a first guide sleeve matched with the first guide rod, the first baffle driving mechanism is an oil cylinder, the first guide rod is passed through the first guide sleeve, one end of the first guide rod is connected to the first baffle, and when the oil cylinder drives the first baffle to move up and down, the first guide rod moves up and down in the first guide sleeve to guide the first baffle.

[0017] In one embodiment, it also includes a material turning mechanism, which is provided with multiple groups. The material turning mechanism includes a material turning plate, a material turning cylinder, a first connecting rod and a second connecting rod. The material turning cylinder of each group of the material turning mechanism is fixed on the mounting table, and the output end of the material turning cylinder is rotatably connected to the first connecting rod. The first connecting rod is fixedly connected to one end of the second connecting rod. There are multiple second connecting rods, and the other end of each of the second connecting rods is fixedly connected to a material turning plate. These material turning plates are arranged on the mounting table and are alternately arranged with the lifting and lowering baffles of the lifting and positioning device.

[0018] Compared with the prior art, the advantages of the fixed-size combination saw equipment of the present application are: 1): The present application can realize full-size positioning sawing of materials, improve the dimensional accuracy of sawn materials, and reduce the floor space occupied by equipment; 2): The material head flush mechanism and material tail flush mechanism of the fixed-size combination saw equipment of the present application can align the material head and material tail, and accurately position the material through the lifting positioning device and the detection switch, and compensate the size of the material through the grating ruler, so as to realize accurate sawing of the material size and improve the sawing efficiency.

[0019] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0021] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0022] Figure 1 The structure diagram of the fixed-length combined saw device according to the embodiment of the present disclosure is shown. Figure 1 ;

[0023] Figure 2 The structure diagram of the fixed-length combined saw device according to the embodiment of the present disclosure is shown. Figure 2 ;

[0024] Figure 3 Shows Figure 2 A top view of

[0025] Figure 4 Shows Figure 2 Schematic side view of

[0026] Figure 5 Shows Figure 1 A magnified schematic diagram of L in the middle;

[0027] Figure 6 Shows Figure 1 A magnified schematic diagram of N in the figure;

[0028] Figure 7 Shows Figure 2 A magnified schematic diagram of M in the middle;

[0029] Figure 8 Shows Figure 4 Enlarged schematic diagram of K in the figure.

[0030] Explanation of the numbers in the figure: 1-electric roller, 2-fixed sawing machine, 3-mobile sawing machine, 4-lifting and positioning device, 5-material turning mechanism, 6-material head leveling mechanism, 7-material tail leveling mechanism, 8-detection switch, 9-mounting table, 10-linear guide mechanism, 11-lifting baffle, 12-material turning cylinder, 13-first connecting rod, 14-second connecting rod, 15-material turning plate, 18-second baffle, 19-first baffle, 20-first cylinder, 21-first guide rod, 22-first guide sleeve, 23-second cylinder, 24-second guide rod, 25-second guide sleeve. DETAILED DESCRIPTION

[0031] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0032] A fixed-length combined saw device comprises an electric roller table 1, a fixed sawing machine 2, a mobile sawing machine 3, a lifting and positioning device 4, a material turning mechanism 5, a material head leveling mechanism 6, a material tail leveling mechanism 7, a mounting platform 9 and a control system. The control system is used to control the operation of the electric roller table 1, the fixed sawing machine 2, the mobile sawing machine 3, the lifting and positioning device 4, the material turning mechanism 5, the material head leveling mechanism 6, and the material tail leveling mechanism 7. In the present application, automation is achieved by controlling the operation of the control system.

[0033] Generally, when transporting materials, the materials are placed on a roller conveyor and moved for transportation. In this application, the electric roller conveyor 1 (sometimes also referred to as a roller conveyor) is installed on a long mounting platform 9 in the same manner as in the conventional manner. Figure 1 As shown, the self-rotating electric roller 1 is used to carry the material to be sawed and drive the material to be sawed toward the fixed sawing machine 2 or the mobile sawing machine 3; the fixed sawing machine 2 and the mobile sawing machine 3 are respectively arranged at the left and right ends of the electric roller 1, and the material head leveling mechanism 6 and the material tail leveling mechanism 7 are respectively installed on the mounting tables close to the fixed sawing machine 2 and the mobile sawing machine 3. The fixed sawing machine 2 is fixed on a fixed surface, and is used for sawing the head of the material to be sawed on the roller table (the head and tail of the material are named for the convenience of description in this application, and the two ends of the material to be sawed are not specifically meant to be sawed by a fixed sawing machine, and the tail of the material must be sawed by a mobile sawing machine. Instead, the material is sawed by a fixed sawing machine first, and the end that is sawn first is named the head of the material). The mobile sawing machine 3 is slidably installed on the fixed surface through a linear guide mechanism 10, and is used to slide on the linear guide mechanism toward or away from the mobile sawing machine 3, wherein the fixed surface is generally the ground; specifically, the linear guide mechanism 10 has a guide rail and a corresponding slider, and the mobile sawing machine 3 is installed on the slider, and the linear guide mechanism is driven by a cylinder.

[0034] like Figure 1 , Figure 5 and Figure 6 As shown, the material head flush mechanism 6 and the material tail flush mechanism 7 are used to prevent the movement of the material to be sawed so that the material to be sawed is flush with the driving lower end of the roller. The material head flush mechanism 6 is installed on a mounting table close to the fixed sawing machine, and the material tail flush mechanism 7 is installed on a workbench and is arranged close to the mobile sawing machine. The structure of the material head flush mechanism 6 and the material tail flush mechanism 7 is the same. Taking the material tail flush mechanism 7 as an example, the material tail flush mechanism 7 includes a first baffle 19, a first oil cylinder 20, a first guide rod 21 and a first guide sleeve 22. The first oil cylinder 20 is vertically arranged upward and the first oil cylinder The first oil cylinder 20 is fixed on the mounting platform 9. The output end of the first oil cylinder 20 is connected to the first baffle 19 to drive the first baffle 19 to move vertically up and down. The first baffle 19 is used to prevent the material to be sawed from moving under the drive of the first oil cylinder 20 and to make the tail of the material to be sawed flush under the drive of the roller. One end of the first guide rod 21 is fixedly connected to the bottom of the first baffle 19. The first guide rod 21 is inserted into the first guide sleeve 22. The guide sleeve 22 is fixedly connected to the mounting platform 9. When the first oil cylinder 20 drives the first baffle 19 to move, the first guide sleeve 22 guides the first guide rod 21. The material head flushing mechanism 6 also includes a second baffle 18, an oil cylinder, a guide rod and a guide sleeve. The second baffle 18 is used to prevent the material to be sawed from moving under the drive of the oil cylinder and to make the material head of the material to be sawed flush under the drive of the roller. Their connection method is the same as that of the material tail flushing mechanism 7, which will not be repeated here.

[0035] like Figure 2 , Figure 7 As shown, a lifting and positioning device 4 is provided on the mounting platform 9 at the middle position of the material head leveling mechanism 6 and the material tail leveling mechanism 7. The lifting and positioning device 4 is used to position the material to be sawed, that is, a plurality of lifting and positioning devices 4 are provided, which are installed on the mounting platform at equal intervals. The lifting and positioning device 4 includes a lifting baffle 11, a second oil cylinder 23, a second guide rod 24 and a second guide sleeve 25. The second oil cylinder 23 is vertically arranged upward and the second oil cylinder 23 is fixed on the mounting platform. The output end of the second oil cylinder 23 is connected to the lifting baffle 11 to drive the lifting baffle 11 to move up and down. The lifting baffle 11 is used to prevent the material to be sawed from moving and to make the end of the material to be sawed flush under the drive of the roller. One end of the second guide rod 24 is fixedly connected to the bottom of the lifting baffle 11, and the second guide rod 24 is inserted into the second guide sleeve 25. The second guide sleeve 25 is fixedly connected to the mounting platform 9. When the second oil cylinder 23 drives the lifting baffle 11 to move up and down, the second guide sleeve 25 guides the second guide rod 24.

[0036] In order to cooperate with the lifting and positioning device to complete the positioning, a detection switch 8 is installed near the lifting baffle of each lifting and positioning device. The detection switch can be set independently of the mounting platform or installed on the mounting platform. It is only necessary to pay attention to the installation of the detection switch without interfering with other devices. Therefore, the spacing between the detection switches 8 is equal. The detection switch is used to detect the position information of the material to be sawed on the roller and send the position information to the control system. The control system controls the second oil cylinder of the lifting and positioning device to work according to the position signal sent by the detection switch. The lifting baffle 11 is driven by the second oil cylinder to raise the material head of the material to be sawed. After the material head is flush with the material head under the blocking of the lifting baffle, the mobile sawing machine is controlled to move to compensate for the size of the material to be sawed, so as to saw the tail of the material to be sawed.

[0037] In order to accurately compensate for the size of the material to be sawed, a grating scale is also provided near the mobile sawing machine 3. The grating scale includes a main scale and a reading head. The reading head is installed on the mobile sawing machine to follow the movement of the mobile sawing machine. The main scale is installed on the mounting table. The grating scale is used to determine the moving distance of the mobile sawing machine and send signals to the control system in real time. The control system controls the oil cylinder to drive the mobile sawing machine to move accurately to compensate for the size of the material to be sawed.

[0038] Among them, since the spacing of the detection switches 8 is equal, and when the mobile sawing machine is at one end of the linear guide mechanism and is far away from the detection switch 8, here, we name the detection switch closest to the mobile sawing machine as the first detection switch, and the position of the first detection switch is as follows: Figure 3 As shown in point A in FIG. 1 , by analogy, toward the fixed sawing machine 2, the detection switches 8 are named the second detection switch, the third detection switch, the fourth detection switch, and so on. Figure 3 From point B to point J in the figure, the distance between the detection switches can be adjusted according to the actual sawing size of the material to be sawed, for example, the distance between the detection switches can be 1m; the end of the linear guide mechanism far away from the first detection switch (the first detection switch at point A) is named the first linear guide end, and the end close to the first detection switch is named the second linear guide end. And because the stroke of the linear guide mechanism is fixed, the distance between the mobile sawing machine and the first detection switch when it is at the first linear guide end and the second linear guide end is also fixed. And the detection switch of the AJ point and the corresponding lifting and positioning device can be numbered in advance in the control system; therefore, when the material to be sawed after the head sawing is completed moves toward the mobile sawing machine 3 on the roller, the control system processes and judges according to the position signal sent by the corresponding detection switch each time the head of the material to be sawed passes through a detection switch. When the head of the material to be sawed moves to a certain detection switch, the control system receives the position signal of the detection switch and processes and determines that the material to be sawed enters the sawing range, and controls the second cylinder of the corresponding lifting and positioning device to raise the lifting baffle 11. At this time, the electric roller stops working and starts to rotate in the opposite direction to make the head of the material to be sawed flush with the lifting baffle surface; the mobile sawing machine 3 is controlled by the control system to compensate the size of the material to be sawed, and the compensation size is accurately sized according to the grating ruler to complete the sawing.

[0039] For example: In the first example, when the spacing between the detection switches is 1m, the spacing between the first detection switch (point A) and the first linear guide end is 4m, and the stroke of the linear guide mechanism is 1m, that is, the spacing between the first detection switch and the second linear guide end is 3m, when the length of the material to be sawed required to complete the sawing of the material head is 5m, when the material head to be sawed passes through the second detection switch (point B), because the spacing between the second detection switch and the first linear guide end is 5m, it reaches the sawing range, then the control system controls the lifting baffle corresponding to the second detection switch to rise, so that the material head can be aligned and then sawed. In the second example, when the length of the material to be sawed to complete the sawing of the head is 5.5m, when the head of the material to be sawed passes the third detection switch (point C), the distance between the third detection switch (point C) and the end of the first linear guide is 6m, and the distance between the third detection switch (point C) and the end of the second linear guide is 5m. At this time, the tail of the material to be sawed has traveled out of the roller range, and the lifting baffle corresponding to the third detection switch is raised, and the roller is reversed to make the head flush with the end of the lifting baffle. The mobile sawing machine located at the end of the first linear guide needs to compensate for the size of the material to be sawed. The grating ruler (used to supplement the size within 1 meter, the same specification only needs to be moved once) and the control system are used to control the mobile sawing machine 3 to move 0.5m to complete the sawing of the material to be sawed. The control method used by the control system in this application can be programmed by those skilled in the art based on relevant technical knowledge, and the implementation process of the control method of the control system of this application will not be repeated here.

[0040] like Figure 4 and Figure 8 As shown, a flipping mechanism 5 is also installed on the mounting table, and the flipping mechanism is provided with 3 groups, each group of the flipping mechanism 5 includes a flipping cylinder 12, a first connecting rod 13, a second connecting rod 14 and a flipping plate 15, and the second connecting rod 14 and the flipping plate 15 are provided with multiple and the two are equal in number; the flipping cylinder 12 is fixed on the mounting table 9, and the output end of the flipping cylinder 12 is rotatably connected to the first connecting rod 13, the first connecting rod 13 is fixedly connected to one end of the second connecting rod 14, and the other end of the second connecting rod 14 is fixedly connected to the flipping plate 15, and the three groups of flipping plates 15 are alternately arranged with the lifting baffle 11 of the lifting and positioning device 4. When not working, the flipping plate 15 is horizontally placed on the surface of the mounting table and is set below the height of the roller.

[0041] The working process of the fixed-length combined saw device of the present application is as follows:

[0042] 1: Place the material to be sawed on the electric roller 1, start the electric roller 1, and the electric roller 1 rotates to drive the material to be sawed to move toward the fixed sawing machine 2. While the electric roller 1 is started, the oil cylinder on the material head leveling mechanism 6 drives the second baffle 18 to rise. When the material to be sawed moves to the position of the second baffle 18, the second baffle 18 hinders the material to be sawed from moving forward and is driven by the electric roller 1, so that the material head of the material to be sawed is flush with the surface of the second baffle 18. After the surface of the sawed material is flush, the electric roller 1 stops working, the second baffle 18 drops, and the electric roller 1 continues to work, driving the material to be sawed to move toward the fixed sawing machine 2, adjusting the length of the material head, and the fixed sawing machine 2 saws the material head, and the material head sawing is completed;

[0043] 2: The material to be sawed moves toward the mobile sawing machine 3 under the drive of the electric roller 1. When the material to be sawed moves, each time the head of the material to be sawed passes a detection switch, the corresponding detection switch sends the position information of the head of the material to be sawed to the control system in real time. When the head of the material to be sawed reaches the sawing range after passing a certain detection switch, the control system controls the corresponding lifting and positioning device to raise the lifting baffle 11, and the electric roller stops working at this time;

[0044] 3: The electric roller table 1 changes its rotation direction to move the material to be sawed toward the lifting baffle 11, so that the head of the material to be sawed is flush with the lifting baffle 11, and the control system controls the oil cylinder of the linear guide mechanism to drive the mobile sawing machine 3 to move and control the mobile sawing machine 3 to accurately reach the sawing position according to the moving position signal sent by the grating ruler in real time, and the mobile sawing machine 3 saws the tail of the material;

[0045] 4: After sawing is completed, the electric roller 1 moves toward the fixed sawing machine. After the tail of the material passes through the first baffle 19 of the tail leveling mechanism 7, the first baffle 19 is raised, and the electric roller reverses to make the tail of the material level under the action of the first baffle. After the tail of the material is aligned, the first baffle 19 is lowered with a delay, and then the material turning mechanism turns the material. Wait for the next cycle.

[0046] It should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A fixed-length combined saw device, characterized in that: It comprises a mounting platform, on which a rotatable roller is mounted, and the roller is used to carry the material to be sawed and drive the material to be sawed to move; A fixed sawing machine, which is arranged at one end of the mounting table and is used to saw the head of the material to be sawed on the roller table; A mobile sawing machine, which is arranged at the other end of the mounting platform and is slidably connected to the fixed surface, and is used to saw the tail of the material to be sawed on the roller table; A lifting and positioning device, wherein a plurality of lifting and positioning devices are provided and are installed on the mounting platform at equal intervals, wherein the lifting and positioning device comprises a lifting mechanism and a lifting baffle, wherein the lifting baffle is connected to the lifting mechanism and is driven by the lifting mechanism to move up and down in the vertical direction to prevent the material to be sawed from moving and to make the head or tail of the material to be sawed flush under the drive of the roller table; A detection switch, wherein a plurality of detection switches are provided, each detection switch is arranged near a lifting baffle, and the detection switch is used to detect the position of the material to be sawed and send the position information to the control system. The control system controls the lifting baffle of the lifting and positioning device to rise, so that the material to be sawed is driven by the roller to make the material head flush under the blocking of the lifting baffle, and then controls the mobile sawing machine to move to compensate for the size of the material to be sawed, so that the tail of the material to be sawed is completed.

2. The fixed-length combined saw device according to claim 1, characterized in that: It also includes a grating scale, which includes a main scale and a reading head. The reading head is installed on the mobile sawing machine and is used to follow the movement of the mobile sawing machine. The main scale is installed on the mounting table. The grating scale is used to detect the moving displacement of the mobile sawing machine and output a signal to the control system. The control system controls the displacement of the mobile sawing machine according to the signal.

3. The fixed-length combined saw device according to claim 2, characterized in that: The mobile sawing machine is installed on a fixed surface through a linear guide mechanism. The linear guide mechanism includes a guide rail and a slider matched with the guide rail, and the mobile sawing machine is fixed on the slider.

4. The fixed-length combined saw device according to claim 1, characterized in that: The lifting mechanism comprises a second oil cylinder, which is arranged vertically upwards, and an output end of the second oil cylinder is connected to the lifting baffle to drive the lifting baffle to move up and down in the vertical direction.

5. The fixed-length combined sawing device according to claim 4, characterized in that: The lifting and positioning device also includes a second guide rod and a second guide sleeve adapted to the second guide rod, the second guide rod is inserted into the second guide sleeve, one end of the second guide rod is connected to the lifting baffle, and when the second oil cylinder drives the lifting baffle to move up and down, the second guide sleeve guides the second guide rod.

6. The fixed-length combined saw device according to claim 1, characterized in that: It also includes a material head leveling mechanism, which is installed on a mounting table close to the fixed sawing machine. The material head leveling mechanism includes a second baffle and a second baffle driving mechanism. The second baffle is connected to the second baffle driving mechanism and is driven by the second baffle driving mechanism to move up and down in the vertical direction to prevent the material to be sawed from moving and to make the material head to be sawed level under the drive of the roller.

7. The fixed-length combined saw device according to claim 1, characterized in that: It also includes a material tail leveling mechanism, which is installed on a workbench and arranged close to the mobile sawing machine. The material tail leveling mechanism includes a first baffle and a first baffle driving mechanism. The first baffle is connected to the first baffle driving mechanism and is driven by the first baffle driving mechanism to move up and down in the vertical direction to prevent the movement of the material to be sawed and to make the tail of the material to be sawed level under the drive of the roller.

8. The fixed-length combined sawing device according to claim 6, characterized in that: The material head leveling mechanism also includes a guide rod and a guide sleeve matched with the guide rod. The second baffle driving mechanism is an oil cylinder. The guide rod is inserted into the guide sleeve. One end of the guide rod is connected to the second baffle. When the oil cylinder drives the second baffle to move up and down, the guide rod moves up and down in the guide sleeve to guide the second baffle.

9. The fixed-length combined saw device according to claim 7, characterized in that: The tail leveling mechanism also includes a first guide rod and a first guide sleeve matched with the first guide rod. The first baffle driving mechanism is an oil cylinder. The first guide rod is inserted into the first guide sleeve. One end of the first guide rod is connected to the first baffle. When the oil cylinder drives the first baffle to move up and down, the first guide rod moves up and down in the first guide sleeve to guide the first baffle.

10. A fixed-length combined saw device according to any one of claims 1 to 9, characterized in that: It also includes a material turning mechanism, which is provided with multiple groups. The material turning mechanism includes a turning plate, a turning cylinder, a first connecting rod and a second connecting rod. The turning cylinder of each group of the turning mechanism is fixed on the mounting table. The output end of the turning cylinder is rotatably connected to the first connecting rod. The first connecting rod is fixedly connected to one end of the second connecting rod. There are multiple second connecting rods, and the other end of each of the second connecting rods is fixedly connected to a turning plate. These turning plates are arranged on the mounting table and are alternately arranged with the lifting and lowering baffles of the lifting and positioning device.

Images