Centering device for flaky materials

Abstract

The utility model discloses a centering device for sheet materials. The device comprises a driving mechanism and a plurality of guide lifting units which are arranged side by side at intervals. Each guide lifting unit comprises a supporting vertical plate, a lifting guide assembly and a transmission assembly, each lifting guide assembly comprises a supporting frame and a plurality of guide wedge blocks arranged on the supporting frame, the supporting frames are slidably connected to the supporting vertical plates in the vertical direction, the transmission assemblies are used for driving the lifting guide assemblies to ascend and descend, every two adjacent lifting guide assemblies form one set, and the transmission assemblies are used for driving the lifting guide assemblies to ascend and descend. The space between the centering mechanisms is used for centering and clamping a workpiece; the driving mechanism comprises a driving execution part and a driving shaft connected with the driving execution part, and the driving shaft is in transmission connection with the transmission assemblies in the correcting lifting units. According to the technical scheme, when the lifting guide assemblies are synchronously driven to ascend and descend, the guide wedge blocks on the two sides jointly guide workpieces to reach the centering state, the device is simple, the structure is compact, and the efficiency and accuracy of centering operation can be greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automation, in particular to a centering device for sheet materials. BACKGROUND

[0002] Thin brittle workpieces are often transmitted by belt lines, which is simple in design and low in cost. This is its advantage, but also has the disadvantage that relative deviation of the workpieces will occur when freely transmitting or due to inconsistent belt speed or different friction states, and the center of the workpiece often needs certain accuracy in the flow direction.

[0003] In order to solve the centering problem in the transmission process, various guide lifting units are designed in the prior art, such as centering by using the centering property of pneumatic clamps, centering by using the relative motion of two sides of synchronous belts, centering by using a crank slider mechanism, etc. However, the application scenarios of the above centering schemes are limited, and the workpiece conveying line for some application scenarios may not be suitable. In addition, the mechanism for simultaneously centering multiple sheet materials is not simple and easy to use at present. CONTENT OF THE UTILITY MODEL

[0004] The present application mainly provides a centering device for sheet materials to solve the problem that the application scenarios of the centering device for sheet materials in the prior art are limited and the centering scheme for workpieces on the conveying line is still relatively lacking.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is to provide a centering device for sheet materials. The centering device for sheet materials comprises:

[0006] A plurality of guide lifting units are arranged side by side and at intervals, each of the guide lifting units comprises a support vertical plate, a lifting guide assembly and a transmission assembly, the lifting guide assembly comprises a support frame and a plurality of guide wedges connected to the support frame, the support frame is connected to the support vertical plate in a sliding manner along the vertical direction, and the transmission assembly is used to drive the lifting guide assembly to lift, two adjacent lifting guide assemblies form a group and constitute a centering mechanism, and the space between the two adjacent lifting guide assemblies is used to center and hold a workpiece;

[0007] A driving mechanism comprises a driving executive member and a driving shaft connected to the driving executive member, the driving shaft is in transmission connection with the transmission assembly in each guide lifting unit, and the driving executive member is used to simultaneously drive each lifting guide assembly to lift, so that the guide wedges on the adjacent lifting guide assemblies center and position the workpiece therebetween.

[0008] In some embodiments, the two adjacent alignment wedges are oppositely arranged, and each of the opposite sides of the two alignment wedges is provided with an alignment slope, and the alignment slopes of the two adjacent alignment units are inclined inward from top to bottom to form an inverted isosceles trapezoidal alignment space between the two alignment wedges.

[0009] In some embodiments, the plurality of alignment units are arranged side by side along a first direction, the plurality of alignment wedges in one alignment unit are arranged in one or two rows, and the plurality of alignment wedges in each row are arranged at intervals along a second direction perpendicular to the first direction.

[0010] In some embodiments, the number of alignment units is at least three, the support frame on the alignment unit in the middle position is provided with two rows of alignment wedges, and the support frame on the alignment unit on each side is provided with one row of alignment wedges; wherein the alignment slopes of the two adjacent alignment units are inclined inward from top to bottom, and the two rows of alignment wedges on the same alignment unit in the middle position are inclined outward from top to bottom.

[0011] In some embodiments, the support frame comprises:

[0012] a vertical part slidingly connected to the support stand in a vertical direction;

[0013] a straight bar part perpendicularly arranged at the top end of the vertical part, and a plurality of alignment wedges are arranged at intervals on the straight bar part along the extension direction of the straight bar part, and the straight bar part extends along the second direction.

[0014] In some embodiments, the transmission assembly comprises a lifting cam in rolling contact with the bottom end of the support frame, and the transmission assembly further comprises a belt transmission mechanism rotatably installed on one side of the support stand, the belt transmission mechanism comprises a driving wheel, a transmission wheel, and a synchronous belt connecting the driving wheel and the transmission wheel, the driving wheel is in transmission connection with the driving shaft, the lifting cam is coaxially connected with the transmission wheel, and the lifting cam drives the support frame to lift relative to the support stand by rotation.

[0015] In some embodiments, the periphery of the lifting cam comprises at least one far rest point and at least one near rest point.

[0016] During the rotation of the lifting cam, the bottom end of the support frame is driven to descend in the rolling contact stroke from the far rest point to the near rest point, and the bottom end of the support frame is driven to ascend in the rolling contact stroke from the near rest point to the far rest point.

[0017] In some embodiments, a rolling member is rotatably connected to the bottom end of the support frame, and the rolling member is in rolling contact with the lifting cam.

[0018] In some embodiments, the transmission assembly further comprises a tensioning member arranged on the support stand, and the tensioning member is used for tensioning the synchronous belt.

[0019] In some embodiments, the centering device for sheet materials further comprises at least one set of belt conveying lines, and one set of the belt conveying lines is used for conveying one row of workpieces, and one set of the belt conveying lines is located between two lifting and guiding units of one centering mechanism.

[0020] The belt conveying line comprises at least two belt lines arranged side by side and at intervals, and an interval is formed between two adjacent belt lines.

[0021] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a centering device for sheet materials, which comprises a driving mechanism and a plurality of lifting and guiding units arranged side by side and at intervals. Each lifting and guiding unit comprises a support stand, a lifting and guiding assembly, and a transmission assembly, and the lifting and guiding assembly comprises a support frame and a plurality of guiding wedges arranged on the support frame. Based on the connection structure design of the driving shaft in the driving mechanism and each lifting and guiding unit, the driving shaft can drive each lifting and guiding assembly to lift simultaneously when the driving shaft rotates. Under the limiting of the guiding wedges and the gravity of the workpieces, the workpieces are guided to the centered state by the two guiding wedges, and the centering operation is completed. The device is simple and compact, and when a plurality of workpieces or a plurality of lifting and guiding units are arranged between adjacent lifting and guiding assemblies, the simultaneous centering and positioning of a plurality of workpieces can be realized, thereby greatly improving the efficiency and accuracy of the centering operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 is a structural schematic diagram of the centering device for sheet materials in the embodiment of the present application Figure 1 .

[0024] Figure 2 is a structural schematic diagram of the centering device for sheet materials in the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0025] With reference to the drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0026] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] Reference is made to Figure 1As shown, the present application provides a sheet material centering device 100. The sheet material centering device 100 comprises a plurality of guide and lifting units 10 and a driving mechanism 20. The plurality of guide and lifting units 10 are arranged side by side and spaced apart along a first direction, and each of the guide and lifting units 10 comprises a support vertical plate 11, a lifting and guiding assembly 12, and a transmission assembly 13. The lifting and guiding assembly 12 comprises a support frame 121 and a plurality of guide wedges 122 connected to the support frame 121. The plurality of guide wedges 122 are arranged in one or two rows, and the plurality of guide wedges 122 in each row are arranged spaced apart along a second direction perpendicular to the first direction. The support frame 121 is slidingly connected to the support vertical plate 11 along a vertical direction, so that the support frame 121 can move up and down relative to the support vertical plate 11 along the vertical direction to center the workpiece by the guide wedges 122 of the adjacent two lifting and guiding assemblies 12. The transmission assembly 13 is connected to the driving mechanism 20 to drive the lifting and guiding assembly 12 to move up and down under the driving of the driving mechanism 20. The transmission assembly 13 drives the lifting and guiding assembly 12 to move up and down in various ways, such as the lifting cam 131 cooperating with the rolling member 123 in the embodiment below, at which time the transmission assembly 13 is in motion contact with the lifting and guiding assembly 12. For example, the transmission assembly 13 is a connecting rod assembly, one end of which is connected to the driving mechanism 20, and the other end is connected to the support frame 121, so that the lifting and guiding assembly 12 can also be driven to move up and down by the transmission assembly 13 in this form. Of course, the structure of the transmission assembly 13 is not limited to the examples shown in the present application.

[0029] In the present application, the number of guide and lifting units 10 is at least two, and when the number is exactly two, it is only used for centering and positioning of one row of battery sheets. The number of guide and lifting units 10 can also be greater than two, which is used for centering and positioning of at least two rows of battery sheets. At this time, the adjacent two lifting and guiding assemblies 12 form a group to constitute a centering mechanism. The space between the adjacent two lifting and guiding assemblies 12 is used for centering and clamping the workpiece.

[0030] The driving mechanism 20 comprises a driving executive member 23 and a driving shaft 21 connected to the driving executive member 23. The driving shaft 21 is in transmission connection with the transmission assembly 13 in each guide and lifting unit 10, and then drives each lifting and guiding assembly 12 to move up and down through the driving executive member 23, so that the guide wedges 122 on the adjacent lifting and guiding assemblies 12 center and position the workpiece therebetween. Specifically, the driving executive member 23 is, for example, a motor.

[0031] In the technical solution of the present application, power is output through the driving mechanism 20, and multiple lifting and guiding assemblies 12 are synchronously driven to perform lifting movement based on power transmission of the transmission assembly 13. In the process of lifting of the multiple lifting and guiding assemblies 12, the guiding wedges 122 on the adjacent two lifting and guiding assemblies 12 are in contact with a row of workpieces, and the workpieces between the adjacent lifting and guiding assemblies 12 are centered under the action of their own gravity based on the limiting and guiding action of the guiding wedges 122, so that the device is simple and compact in structure.

[0032] Referring to Figure 1 As shown in the figure, the guiding wedges 122 on the adjacent support frames 121 are oppositely arranged in pairs, the opposite sides of the guiding wedges 122 are provided with guiding inclined surfaces 1221, and the guiding inclined surfaces 1221 of the adjacent two lifting and guiding assemblies 12 are inclined inward from top to bottom, i.e. inclined toward each other. In this way, a guiding space in the shape of an inverted isosceles trapezoid is formed between the two opposite guiding wedges 122, and the guiding space is actually a limiting space for the workpieces therebetween.

[0033] In operation, the adjacent lifting and guiding assemblies 12 are synchronously lifted and then lowered, and the workpieces are centered under the action of the guiding inclined surfaces and gravity through one-time (this case is suitable for workpieces with good attitude that only need one-time) or multiple guiding wedge 122 lifting.

[0034] Further preferably, among the multiple guiding and lifting units 10, the support frame 121 on the middle guiding and lifting unit 10 is provided with two rows of guiding wedges 122, and the support frame 121 on the guiding and lifting unit 10 at both sides is provided with one row of guiding wedges 122. The two rows of guiding wedges 122 on the middle guiding and lifting unit 10 are also arranged in the first direction at intervals, and the guiding inclined surfaces 1221 of the two rows of guiding wedges 122 on the middle guiding and lifting unit 10 are inclined outward from top to bottom, forming a shape similar to a normal isosceles trapezoid. By providing the support frame 121 on the middle guiding and lifting unit 10 with two rows of guiding wedges 122, when at least two rows of battery pieces are centered, the number of transmission assemblies 13 can be reduced, further making the centering device simple and compact in structure and saving cost.

[0035] Of course, the support frame 121 on the middle guiding and lifting unit 10 can also be provided with only one row of guiding wedges 122, at this time, the number of lifting and guiding assemblies 12 is even, and in the order of the first to the nth, the two adjacent rows of guiding wedges 122 in the two adjacent lifting and guiding assemblies 12 form a group to guide one row of battery pieces, at this time, the guiding inclined surfaces 1221 of the two adjacent rows of guiding wedges 122 are inclined inward from top to bottom, forming a guiding space in the shape of an inverted isosceles trapezoid.

[0036] Referring to Figure 1As shown, in some embodiments, the support frame 121 comprises a vertical portion 1211 and a straight bar portion 1212. The vertical portion 1211 is slidingly connected to the support stand 11 in a vertical direction; the straight bar portion 1212 is perpendicularly arranged at the top end of the vertical portion 1211; a plurality of guide wedges 122 are arranged on the straight bar portion 1212 in a direction along which the straight bar portion 1212 extends.

[0037] In this embodiment, the structure of the support frame 121 is further designed. The vertical portion 1211 is responsible for slidingly connecting the support frame 121 as a whole to the support stand 11. The sliding connection can be achieved by arranging a guide sliding structure, such as a guide rail, between the vertical portion 1211 and the support frame 121, thereby ensuring that the vertical portion 1211 can stably and accurately lift.

[0038] The straight bar portion 1212 is perpendicularly arranged at the top end of the vertical portion 1211, and is preferably designed in a "T" shape with the vertical portion 1211, thereby forming stable support for the straight bar portion 1212 through the vertical portion 1211. Under this design, the straight bar portion 1212 can extend along the conveying direction of the workpieces to provide installation space for the guide wedges 122. Further, the plurality of guide wedges 122 are arranged in a uniform or as-needed manner along the extension direction of the straight bar portion 1212, and ensure that the workpieces can be centered and guided between adjacent straight bar portions 1212. In this way, when a plurality of workpieces are arranged between two opposite straight bar portions 1212, simultaneous centering operation of the plurality of workpieces can be achieved.

[0039] Further, the transmission assembly 13 comprises a lifting cam 131 in rolling contact with the bottom end of the support frame 121. The lifting cam 131 is driven to rotate by the driving shaft 21, and the lifting cam 131 drives the support frame 121 to lift relative to the support stand 11 through rotation.

[0040] It can be understood that when the driving shaft 21 rotates, the lifting cam 131 rotates accordingly. Due to the shape design of the cam, it will have changing contact points with the vertical portion 1211 during rotation, which causes the vertical portion 1211 to move up and down relative to the support stand 11.

[0041] For example, the circumference of the lifting cam 131 generally has a far rest point and a near rest point; during rotation of the lifting cam 131, the bottom end of the support frame 121 is in rolling contact from the far rest point to the near rest point, which drives the support frame 121 to descend, and the bottom end of the support frame 121 is in rolling contact from the near rest point to the far rest point, which drives the support frame 121 to ascend. Thus, under the structure of the lifting cam 131, one rotation of the lifting cam 131 can achieve one lifting drive of the support frame 121.

[0042] In a further technical solution, the periphery of the lifting cam 131 can also have a plurality of far rest points and a plurality of near rest points, so as to realize multiple lifting driving of the vertical part 1211 when the lifting cam 131 rotates one round. For example, the lifting cam 131 is similar to an oval shape, which has two far rest points in the length direction and two near rest points in the width direction, so that two lifting driving of the vertical part 1211 can be realized when the lifting cam 131 rotates one round, thereby facilitating the centering frequency of the workpiece.

[0043] Referring to Figure 1 As shown in the drawings, in some embodiments, the support frame 121, i.e. the bottom end of the vertical part 1211, is rotationally connected with a rolling member 123, which is in rolling contact with the lifting cam 131. The rolling member 123, as an intermediary between the vertical part 1211 and the lifting cam 131, can reduce the friction therebetween, and in the process of rotation of the lifting cam 131, the rolling member 123 can more stably and uniformly receive the driving force from the lifting cam 131 and transmit it to the vertical part 1211, thereby ensuring that the lifting movement of the support frame 121 is more stable and accurate. The rolling member 123 can be a ball or a roller.

[0044] Referring to Figure 1 As shown in the drawings, in some embodiments, the transmission assembly 13 further comprises a belt transmission mechanism rotationally installed on one side of the support stand 11, which comprises a driving wheel 132, a transmission wheel 133 and a synchronous belt 134 connecting the driving wheel 132 and the transmission wheel 133. The driving wheel 132 is in transmission connection with the driving shaft 21, and the lifting cam 131 is coaxially connected with the transmission wheel 133. The transmission assembly 13 is arranged in the form of a belt transmission mechanism, which is simple in design and low in price on the one hand, and can more simply realize the center distance adjustment of adjacent guide lifting units with the cooperation of a tensioning member on the other hand, so as to better improve the workpiece centering effect.

[0045] In this embodiment, the driving wheel 132, the transmission wheel 133 and the synchronous belt 134 form a synchronous transmission system. When the driving member 23 drives the driving shaft 21 to rotate, the driving wheel 132 will rotate, and then, under the transmission action of the synchronous belt 134, this transmission will be transmitted to the transmission wheel 133. Since the transmission wheel 133 is coaxially connected with the lifting cam 131, the rotation of the transmission wheel 133 will directly drive the lifting cam 131 to rotate. Finally, the rotation of the lifting cam 131 will drive the vertical part 1211 to perform lifting movement through the rolling contact between the rolling member 123 and the bottom end of the vertical part 1211.

[0046] The transmission wheel 133 is an idler wheel. Further, the driving mechanism 20 further comprises a speed reducer 22, and the driving implement 23 is connected to the driving shaft 21 through the speed reducer 22. The driving implement 23 is the power source of the whole driving mechanism 20, and is responsible for converting electric energy into mechanical energy. The speed reducer 22 enables the transmission assembly 13 to obtain the required torque while keeping a low rotating speed, thereby improving the stability and reliability of the whole system.

[0047] Referring to Figure 1 As shown in the drawings, in some embodiments, the transmission assembly 13 further comprises a tensioning member 135 arranged on the support vertical plate 11, which is used to tension the synchronous belt 134. The synchronous belt 134 is appropriately tensioned to reduce the sliding and abrasion of the synchronous belt 134 during transmission, and to improve the transmission efficiency. The tensioning member 135 is arranged on the support vertical plate 11, which can conveniently access the synchronous belt 134 and effectively adjust it. The tensioning member 135 can be a tensioning wheel, a tensioning bolt or a tensioning spring, etc.

[0048] Referring to Figure 2 , Figure 2 As shown in the drawings, in some embodiments, the centering device 100 for sheet materials further comprises at least one set of belt conveying lines 30, and one centering mechanism corresponds to one set of belt conveying lines 30. The set of belt conveying lines 30 is located between the two guide lifting units 10 of the centering mechanism. The belt conveying line 30 comprises at least two belt lines 31 arranged side by side and spaced apart, and a spacing 32 is formed between adjacent two belt lines 31. The spacing 32 is used for the turnover rod of the turnover mechanism of the next station to pass through, thereby facilitating the turnover rod to adsorb the workpiece on the belt line 31 and turn over with the workpiece.

[0049] The centering device 100 for sheet materials of the embodiment can perform centering operation on the workpiece conveyed by the belt conveying line 30. When the belt conveying line 30 has multiple sets, that is, multiple rows of workpieces are conveyed, the multiple centering guide lifting units 10 are correspondingly arranged to improve the centering efficiency.

[0050] In addition, the belt conveying line 30 is further designed, and the multiple belt lines 31 in one set of belt conveying lines 30 are arranged at intervals, so that the spacing 32 for the turnover rod to pass through is also left in the belt conveying line 30.

[0051] Different from the prior art, the application provides a centering device 100 for sheet materials, which comprises a driving mechanism 20 and a plurality of parallel and spaced guide lifting units 10. Each guide lifting unit 10 comprises a supporting vertical plate 11, a lifting guide assembly 12 and a transmission assembly 13. The lifting guide assembly 12 comprises a supporting frame 121 and a plurality of guide wedges 122 arranged on the supporting frame 121. Based on the connection structure design of the driving shaft 21 in the driving mechanism 20 and each guide lifting unit 10, the driving shaft 21 can drive each lifting guide assembly 12 to lift at the same time when the driving shaft 21 rotates. Under the limiting of the guide wedges 122 and the gravity of the workpiece, the workpiece is guided to the centered state by the guide wedges 122 on both sides, and the centering operation is completed. The device is simple and compact, and when a plurality of workpieces or a plurality of guide lifting units 10 are arranged between adjacent lifting guide assemblies 12, the simultaneous centering and positioning of a plurality of workpieces can be realized, greatly improving the efficiency and accuracy of the centering operation.

[0052] The above is only an embodiment of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A centering device for sheet material, characterized in that The utility model relates to a centering device for centering and clamping workpieces, comprising: a plurality of centering lifting units arranged side by side and spaced apart, each of the centering lifting units comprising a support vertical plate, a lifting centering assembly and a transmission assembly, the lifting centering assembly comprising a support frame and a plurality of centering wedges connected to the support frame, the support frame being slidingly connected to the support vertical plate in the vertical direction, the transmission assembly being used to drive the lifting centering assembly to lift, two adjacent lifting centering assemblies forming a centering mechanism, and the space between the two adjacent lifting centering assemblies being used to center and clamp workpieces; a driving mechanism comprising a driving executive part and a driving shaft connected to the driving executive part, the driving shaft being in transmission connection with the transmission assembly in each of the centering lifting units, the driving executive part being used to simultaneously drive each of the lifting centering assemblies to lift, so that the centering wedges on the adjacent lifting centering assemblies center and position the workpieces therebetween.

2. A sheet material centering device according to claim 1, characterized in that The centering wedges on the two adjacent lifting centering assemblies are arranged opposite to each other, and each of the opposite sides of the centering wedges is provided with a centering inclined surface, the centering inclined surfaces of the two adjacent lifting centering assemblies being inclined inward from top to bottom, so as to form a reverse isosceles trapezoidal centering space between the two opposite centering wedges.

3. A sheet material centering device according to claim 2, wherein The plurality of centering lifting units are arranged side by side in a first direction, the plurality of centering wedges in one of the centering lifting units being arranged in one or two rows, and the plurality of centering wedges in each row being spaced apart in a second direction perpendicular to the first direction.

4. A sheet material centering device according to claim 3, wherein The number of the centering lifting units is at least three, two rows of centering wedges being arranged on the support frame of the centering lifting unit in the middle position, and one row of centering wedges being arranged on the support frame of each of the centering lifting units on the two sides; wherein the centering inclined surfaces of the two adjacent lifting centering assemblies are inclined inward from top to bottom, and the two rows of centering wedges on the same centering lifting unit in the middle position are inclined outward from top to bottom.

5. The sheet material centering device of claim 3, wherein, The support frame comprises: a vertical part slidingly connected to the support vertical plate in the vertical direction; a straight bar part perpendicularly arranged at the top end of the vertical part, and a plurality of centering wedges being spaced apart on the straight bar part in the extension direction of the straight bar part, the straight bar part extending in the second direction.

6. The sheet material centering device of claim 2, wherein, The transmission assembly comprises a lifting cam in rolling contact with the bottom end of the support frame, and the transmission assembly further comprises a belt transmission mechanism rotatably installed on one side of the support vertical plate, the belt transmission mechanism comprising a driving wheel, a transmission wheel and a synchronous belt connecting the driving wheel and the transmission wheel, the driving wheel being in transmission connection with the driving shaft, the lifting cam being coaxially connected with the transmission wheel, and the lifting cam driving the support frame to lift relative to the support vertical plate through rotation.

7. A sheet material centering device according to claim 6, wherein The circumference of the lifting cam comprises at least one far rest point and at least one near rest point. During rotation of the lifting cam, the bottom end of the support frame is driven to descend in a rolling contact stroke from the distal rest point to the proximal rest point, and the bottom end of the support frame is driven to ascend in a rolling contact stroke from the proximal rest point to the distal rest point.

8. A sheet material centering device according to claim 6, wherein The bottom end of the support frame is rotationally connected with a rolling member, and the rolling member is in rolling contact with the lifting cam.

9. The sheet material centering device of claim 6, wherein, The transmission assembly further comprises a tensioning member arranged on the support stand, and the tensioning member is used for tensioning the synchronous belt.

10. The sheet material centering device of claim 1, wherein, The centering device for the sheet materials further comprises at least one set of belt conveying lines, one set of the belt conveying lines is used for conveying one row of workpieces, and one set of the belt conveying lines is located between the two guide lifting units of one centering mechanism. The belt conveying line comprises at least two belt lines arranged side by side and at intervals, and an interval is formed between adjacent two belt lines.

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