Sheet stock machine double-material detection structure and detection process

Abstract

The invention discloses a sheet stock machine double-material detection structure and a detection process, the sheet stock machine double-material detection structure comprises a rack assembly, the rack assembly is provided with a moving assembly used for moving sheet stock and a separating assembly used for separating double materials, the moving assembly comprises a first adsorption assembly used for adsorbing the sheet stock and a first detection end, and the separating assembly comprises a second adsorption assembly used for adsorbing the sheet stock and a second detection end; and the separation assembly comprises a second detection end. The invention provides a double-material detection structure and a detection process for a sheet material machine, which can automatically perform double-material detection on sheet materials in a transfer process, automatically separate the double materials and convey the double materials one by one after the double materials are detected, so that manual separation is avoided, the error reporting frequency of equipment is reduced, the automation degree of the equipment is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet detection, and in particular to a sheet machine double sheet detection structure and detection process. BACKGROUND

[0002] In the field of modern automation manufacturing, sheet processing equipment such as sheet machines are widely used in the automotive manufacturing, home appliance production, 3C electronics and new energy battery industries. With the increasing degree of industrial automation, the automation level of stamping production lines and sheet machines is continuously improved to increase production efficiency, ensure product quality and reduce labor costs. Double sheet detection technology, as a key link to ensure the normal operation of automatic feeding systems, has been widely used in various automated production lines.

[0003] However, as described in the patent CN222086949U, the existing double sheet detection technology has significant defects: the detection system can only identify double sheets, but cannot automatically separate them. When the system detects double sheets, it can usually only issue an alarm or stop, and the operator needs to manually intervene to separate the double sheets before restarting the equipment. This processing method not only increases labor costs, but also causes frequent stoppages of the production line, reducing overall production efficiency. In particular, on high-speed automated production lines, frequent stoppages and manual intervention can severely restrict production capacity, causing production cycles to be extended and affecting order delivery cycles. SUMMARY

[0004] The present application provides a sheet machine double sheet detection structure and detection process to address the deficiencies in the prior art. The upper and lower pressing pieces press on the sheet parts, and the size of the pressure value is used to determine whether there are double sheets. If there are double sheets, the lower sheet part is moved laterally to separate the upper and lower sheet parts.

[0005] To solve the above technical problems, the present application provides the following technical solution: a sheet machine double sheet detection structure, comprising a rack assembly, a moving assembly for moving the sheet, and a separation assembly for separating double sheets, the moving assembly comprising a first adsorption assembly for adsorbing the sheet and a first detection end, the separation assembly comprising a second detection end, the first adsorption assembly moving the sheet to the second detection end, the first adsorption assembly descending to combine the first detection end and the second detection end into a whole, and the two cooperating to detect double sheets, the separation assembly further comprising a roller assembly for transferring the sheet, a second adsorption assembly slidingly arranged on the roller assembly, and a first lifting member, when double sheets are detected, the first lifting member lifts the second adsorption assembly and the roller assembly, the second adsorption assembly is adsorbed on the bottom surface of the sheet, the roller assembly is in contact with the bottom surface of the sheet, the pressure is released, the roller assembly and the second adsorption assembly generate a downward force on the lower sheet, and the roller assembly simultaneously starts to separate the upper and lower sheets.

[0006] Its beneficial effect is that it automatically detects whether there are two materials. When it detects that there are two materials, it automatically starts the separation operation of the two materials, and then transports them after separation, reducing the time of manual separation and improving the degree of automation.

[0007] In the above scheme, preferably, the moving component includes a first base plate and a second lifting component disposed on the first base plate, the first adsorption component is disposed at the lower end of the second lifting component, and the first detection end is disposed at the lower end of the second lifting component by being guided up and down by a hydraulic component.

[0008] In the above scheme, preferably, the frame assembly is equipped with a linear module, the first base plate is disposed on the slider of the linear module, the first detection end is guided and slidably disposed at the lower end of the lifting rod of the second lifting component through a hydraulic component, and a first limiting member is disposed on the lower end of the lifting rod of the second lifting component, and the separation assembly includes a support platform, the support platform is used to limit the descent height when the second lifting component descends by pressing the first limiting member against the support platform.

[0009] In the above scheme, preferably, the support platform is provided with an interface end, and the lower end of the first limiting member is provided with a slot that cooperates with the interface end. When the first limiting member presses against the support platform, the interface end and the slot are connected, so that the first detection end and the second detection end can perform lifting operations.

[0010] In the above scheme, preferably, the second detection end includes an elastic telescopic contact head and a pressure sensor for detecting the contact pressure value. After the interface end is connected with the slot, the lower end of the first detection end abuts against the upper end of the sheet material, and the second detection end rises to abut against the lower end of the sheet material. The pressure value on the pressure sensor is used to identify single or double materials.

[0011] In the above scheme, preferably, the first adsorption component is rotatably disposed at the lower end of the second lifting component and is elastically limited by an elastic limiting component, and a driving component for driving the first adsorption component to reciprocate in both directions is disposed on the support platform.

[0012] In the above scheme, preferably, the first adsorption component is annular, with the inner ring rotatably disposed at the lower end of the second lifting component. The driving component includes a sliding block, on which a driving wheel is disposed. The rear end of the sliding block is disposed on the support platform through a telescopic component, which can push the sliding block out so that the driving wheel abuts against the peripheral wall of the first adsorption component.

[0013] In the above scheme, preferably, the roller assembly includes a roller frame, the roller frame has multiple sliding grooves, each sliding groove has a rotating shaft elastically guided and slidably configured, the rotating shaft has a rotating wheel rotatably configured, and the roller frame is also configured with a belt for providing power. When the rotating shaft descends, the rotating wheel on it presses against the belt, thereby causing the rotating wheel to rotate.

[0014] In the above scheme, preferably, the rotating wheel drives the lower sheet material to move on the roller frame. When the sheet material leaves the rotating wheel, it slides upward and disengages from the lower belt, stopping the rotation.

[0015] A dual-material inspection process for sheet forming machines: S1: After the first adsorption component adsorbs the sheet material, it moves to above the separation component through the linear module.

[0016] S2: The first detection end and the second detection end move toward the sheet material to perform dual material detection on the sheet material on the first adsorption component.

[0017] S3: After detecting dual materials, the second adsorption element and roller assembly rise to separate the dual material pieces.

[0018] The beneficial effects of the present invention are as follows: The present invention provides a double material detection structure and detection process for a sheet material machine, which can automatically detect double materials in the sheet material during the transfer process, and automatically separate the double materials after detecting double materials, and transport them one by one, eliminating the need for manual separation, reducing the frequency of equipment error, improving the automation level of the equipment, and reducing production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is a schematic diagram of the moving component and the separating component of the present invention.

[0022] Figure 4 This is a cross-sectional view of the moving component and the separating component of the present invention.

[0023] Figure 5 This is a partially enlarged view of the second detection end of the present invention.

[0024] Figure 6 This is a partial enlarged view of the position of the roller assembly of the present invention.

[0025] Figure 7 This is a partially enlarged view of the location of the driving component of the present invention.

[0026] Figure 8 This is a partially enlarged view of the positions of the roller assembly and the second adsorption assembly of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1:

[0028] See Figures 1-8 A dual-material detection structure for a sheet material processing machine includes a frame assembly 1, a moving assembly 2, and a separating assembly 3. The frame assembly 1 includes a frame member 12, which consists of a bottom plate member 121, a top plate member 122, and a plurality of support columns 123 for fixing and connecting the bottom plate member 121 and the top plate member 122. The bottom plate member 121 is provided with a storage frame for placing sheet materials. An electric push rod is provided below the storage frame. The moving assembly 2 can pick up sheet materials from the storage frame. After the sheet materials are removed, the electric push rod below the storage frame automatically rises to push the sheet materials upward so that the moving assembly 2 can pick up the sheet materials.

[0029] A linear module 11 is arranged on the bottom surface of the top plate 122. The linear module is controlled by a servo motor to move the sliding block on it. The moving component 2 is arranged on the sliding block of the linear module 11. The movement of the sliding block drives the moving component 2 to move precisely on the linear module 11. The frame component 12 is equipped with three workstations, namely a material picking workstation, an inspection workstation, and a material unloading workstation. The three workstations are on the movement path of the linear module 2. The location of the storage frame is the material picking workstation.

[0030] The separation component 3 is located at the detection station. The moving component 2 includes a first adsorption component 21, a first substrate 22, a second lifting component 23, and a first detection end 24. The first substrate 22 is fixedly mounted on the sliding block of the linear module 11 by bolts. The second lifting component 23 is fixedly mounted on the first substrate 22 by bolts and moves vertically. A connecting component 232 is provided on the lower end of the telescopic rod of the second lifting component 23. The first adsorption component 21 includes an annular substrate 211 and several vacuum suction cups 212 evenly distributed on the annular substrate 211. In this application, four vacuum suction cups 212 are selected. The annular substrate 211 is fixedly mounted on the connecting component 232. A hollow slot is provided in the middle of the connecting component 232. The first detection end 24 is disposed in the hollow slot by a hydraulic component. A conveying device is provided on the connecting component 232. The conveying device includes a hydraulic pump and a liquid storage chamber to move the first detection end 24 up and down relative to the connecting component 232.

[0031] The separation component 3 includes a second detection end 31, a roller assembly 32, a second adsorption assembly 33, a first lifting component 34, and a support platform 35. The support platform 35 is fixedly configured on the base plate 121 and located at the detection station. An interface end 351 is configured on the upper surface of the support platform 35. A first limiting component 231 is fixedly configured on the side wall of the connector 232, and a slot is opened on the lower surface of the first limiting component 231. The second detection end 31 is configured on the support platform 35 through a hydraulic component, and the pipe of the hydraulic component is connected to the interface end 351. When the interface end 351 is connected to the slot, the hydraulic pump on the conveying device is connected to the hydraulic component on the second detection end 31. Thus, when the hydraulic pump is running, the first detection end 24 and the second detection end 31 move synchronously toward the sheet material adsorbed on the first adsorption assembly 21.

[0032] In the initial state, the sliding block on the linear module 11 drives the moving component 2 to move to the material picking station. At this time, the second lifting component 23 descends, causing the vacuum suction cup 212 on the first adsorption component 21 to contact the sheet material and vacuum adsorb the sheet material. The second lifting component 23 rises back to the initial state. At this time, the linear module 11 drives the moving component 2 to move to the detection station. The second lifting component 23 descends again, causing the first limiting component 231 to press against the upper surface of the support platform 35. The slot on the first limiting component 231 is fitted onto the interface end 351, thereby connecting the hydraulic pump on the conveying device with the hydraulic component on the second detection end 31. The operation of the hydraulic pump synchronously causes the first detection end 24 and the second detection end 31 to move toward or away from the sheet material adsorbed on the first adsorption component 21.

[0033] The second detection end 31 includes an elastic telescopic contact head 311 and a pressure sensor 312 for detecting the contact pressure value. The pressure sensor 312 is located below the elastic telescopic contact head 311. The first detection end 24 is a fixed contact head that slides downward under the action of a hydraulic component. When fully extended, the lower end of the contact head just touches the upper end surface of the sheet material. When the hydraulic component rises and moves the elastic telescopic contact head 311 upward, when the hydraulic component is fully extended, the upper end of the elastic telescopic contact head 311 elastically touches the lower end surface of the sheet material, and the pressure sensor 312 obtains the pressure value. The reading is compared with the pressure value stored in the control system. After the detection is completed, the hydraulic pump controls the hydraulic component to retract, so that the first detection end 24 and the second detection end 31 are reset, and the second lifting component 23 rises to the initial position.

[0034] If the reading is within the range of values ​​in the system, it is determined to be a single material, and the linear module 11 continues to move, moving the sheet to the unloading station. If the reading is greater than the range of values ​​in the system, it is determined to be a double material, and then the separation operation is performed.

[0035] The roller assembly 32 includes a roller frame 321. Multiple sliding grooves 3211 are evenly formed on the sidewall of the roller frame 321. A rotating shaft 322 is slidably mounted on each sliding groove 3211 for upper guide. An elastic element is disposed within each sliding groove 3211, with both ends of the elastic element abutting against the lower end of the rotating shaft 322 and the lower end of the sliding groove 3211, respectively. A rotating wheel 323, made of rubber, is rotatably mounted on the rotating shaft 322. A belt 324 is also disposed on the roller frame 321. The front or rear rollers on component 324 are power rollers used to drive the belt component 324 to rotate, and the belt component 324 is located below the rotating wheel 323. The first lifting component 34 is fixedly configured on the base plate component 121, and the upper end of its telescopic rod is fixedly configured on the lower end surface of the roller frame 321. The first lifting component 324 extends to drive the roller frame 321 to move upward. When the first lifting component 324 is depressurized, the first lifting component 324 retracts and descends under the action of the gravity of the roller assembly 32.

[0036] The lower end face of the roller frame 321 is provided with a track group 3212. The second adsorption component 33 includes a second substrate 331 and a plurality of vacuum suction cups 212 uniformly arranged on the second substrate 331. The number of vacuum suction cups 212 in the second adsorption component 33 is the same as the number of vacuum suction cups 212 in the first adsorption component 21. The upper end face of the vacuum suction cup 212 is lower than the upper end of the rotating wheel 323.

[0037] When a double material is detected, the first lifting member 324 begins to rise, and the rotating wheel 323 first contacts the lower end surface of the sheet material. The upper end of the sheet material is limited by the second lifting member 23, so the sheet material is in a fixed state and does not move when subjected to downward thrust. At this time, the roller frame 321 continues to move upward under the action of the first lifting member 324. The vacuum suction cup 212 on the second adsorption assembly 33 contacts the lower end surface of the sheet material and adsorbs it. Meanwhile, the rotating wheel 323 relative to the roller frame 321... As the rotating wheel 323 moves downward, its lower end face abuts against the lower belt 324. At this time, the first lifting component 324 begins to release pressure, and the weight of the roller assembly 32 is applied to the second adsorption assembly 33. Therefore, the second adsorption assembly 33 applies a downward pulling force to the lower sheet material. At the same time, the belt 324 begins to rotate, thereby driving the rotating wheel 323 to rotate. The rotation of the rotating wheel 323 causes the rotating wheel 323 to apply a frictional force to the sheet material moving along the roller frame 321. Under the action of the gravity friction, it causes the sheet material to separate from the upper sheet material.

[0038] Its working principle or usage method is as follows: In the initial state, the sliding block on the linear module 11 drives the moving component 2 to move to the material picking station. At this time, the second lifting component 23 descends, causing the vacuum suction cup 212 on the first adsorption component 21 to contact the sheet material and vacuum adsorb the sheet material. The second lifting component 23 rises back to the initial state. At this time, the linear module 11 drives the moving component 2 to move to the detection station. The second lifting component 23 descends again, causing the first limiting component 231 to press against the upper surface of the support platform 35. The slot on the first limiting component 231 is fitted onto the interface end 351, thereby connecting the hydraulic pump on the conveying device with the hydraulic component on the second detection end 31. The hydraulic pump operates synchronously, causing the first detection end 24 and the second detection end 31 to move toward the sheet material adsorbed on the first adsorption component 21.

[0039] The first detection end 24 is a fixed abutment head, which slides downward under the action of the hydraulic component. When fully extended, the lower end of the abutment head just abuts against the upper end surface of the sheet material. When the hydraulic component rises and causes the elastic telescopic abutment head 311 to move upward, when the hydraulic component is fully extended, the upper end of the elastic telescopic abutment head 311 elastically abuts against the lower end surface of the sheet material. The pressure sensor obtains the pressure value and compares the reading with the pressure value stored in the control system. After the detection is completed, the hydraulic pump controls the hydraulic component to retract, so that the first detection end 24 and the second detection end 31 are reset.

[0040] If the reading is within the range of values ​​in the system, it is determined to be a single material. The second lifting component 23 rises to the initial position, and the linear module 11 continues to move, moving the sheet material to the unloading station. If the reading is greater than the range of values ​​in the system, it is determined to be a double material, and then the separation operation is performed.

[0041] If the reading is within the numerical range of the system, it is determined to be a single material. The hydraulic pump controls the hydraulic components to retract, so that the first detection end 24 and the second detection end 31 are reset. The second lifting component 23 rises to the initial position, and the linear module 11 continues to move, moving the sheet material to the unloading station.

[0042] If the reading is greater than the value range in the system, it is determined to be a double material, and then the separation operation is performed. The first lifting member 324 starts to rise, and the rotating wheel 323 first abuts against the lower end surface of the sheet material. The upper end of the sheet material is limited by the second lifting member 23, so the sheet material is in a fixed state at this time. The roller frame 321 continues to move upward under the action of the first lifting member 324. The vacuum suction cup 212 on the second adsorption component 33 contacts the lower end surface of the sheet material and adsorbs it. Meanwhile, the rotating wheel 323 moves downward relative to the roller frame 321. The lower end surface of the rotating wheel 323 abuts against the belt component 324 below. At this time, the first lifting member 324 starts to depressurize, and the weight of the roller assembly 32 is applied to the second adsorption component 33. Therefore, the second adsorption component 33 gives the lower end of the sheet material a downward pulling force.

[0043] At the same time, the belt component 324 starts to rotate, which in turn drives the rotating wheel 323 to rotate. The rotation of the rotating wheel 323 causes the rotating wheel 323 to give the sheet material a frictional force that moves along the roller frame 321. Under the action of gravity and friction, it causes the sheet material to separate from the upper sheet material.

[0044] The second adsorption component 324 has one end that touches the second elastic element at its rear end, and the other end that touches the rear end of the roller frame 321. Therefore, when there is no additional force, the second adsorption component 324 touches the front end of the roller frame 321, that is, it is located in the detection station. The reason why it can move to the rear end of the roller frame 321 is because the rotating wheel 323 gives the sheet material a backward force, and the sheet material is adsorbed by the second adsorption component 324. Therefore, when the second adsorption component 324 adsorbs the sheet material, the rotating wheel 323 gives the second adsorption component 324 a backward thrust.

[0045] An infrared sensor is provided at the rear end of the roller frame 321 to identify when the second adsorption component 33 reaches the rear end of the roller frame 321, that is, when the lower end piece has followed the second adsorption component 33 to the rear end of the roller frame 321, thus confirming that the two pieces have been separated.

[0046] After the infrared sensor detects that the second adsorption component 33 is in place, the belt component 324 stops rotating, the second adsorption component 33 stops moving, the second lifting component 23 rises to the initial position, and the linear module 11 continues to move, moving the sheet material to the unloading station.

[0047] As the linear module 11 moves, the belt component 324 begins to reverse, thereby moving the second adsorption component 33 to its initial position. After the first adsorption component 21 completes unloading, the linear module 11 drives the first adsorption component back to the detection station. The second lifting component 23 descends again, and the first lifting component 324 rises again, causing the sheet material on the second adsorption component 33 to come into contact with the first adsorption component 21. The first adsorption component 21 adsorbs it. After the handover is completed, the second adsorption component 33 stops adsorbing, and the first lifting component 324 descends. The second lifting component 23 rises to its initial position, and the linear module 11 moves backward, moving the sheet material to the unloading station.

[0048] Example 2:

[0049] See Figures 1-8The difference from Embodiment 1 lies in the annular substrate 211 and the driving member 36; all other aspects are the same. The support platform 35 is equipped with a driving member 36 for driving the first adsorption component 21 to reciprocate. The driving member 36 includes a sliding block 361, on which a driving wheel 362 is mounted. The rear end of the sliding block 361 is mounted on the support platform 35 via a telescopic member, which is an electric push rod. Upon detecting a double material, the telescopic member pushes the sliding block 361 out, causing the driving wheel 362 at the front end of the sliding block 361 to abut against the peripheral wall of the annular substrate 211. The annular substrate 211 is rotatably mounted on a connecting member 232, allowing the annular substrate 211 to rotate relative to the connecting member 232. The connecting member 232 is equipped with an elastic locking member, and the annular substrate 211 has a positioning hole adapted to the elastic locking member for elastically locking the annular substrate 211.

[0050] When detecting two materials, the interactive block 361 is pushed outward, and the drive wheel 362 abuts against the outer wall of the annular substrate 211. After the second adsorption component 33 adsorbs the lower end of the sheet material, the drive wheel 362 begins to rotate in one direction or in both directions, so that there is a torque between the upper and lower sheets, which further enables the two sheets adsorbed together to be separated quickly.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sheet machine double material detection structure, characterized by: The utility model provides a kind of sheet material separating device, including rack assembly (1), the rack assembly (1) is configured with moving assembly (2) for moving sheet material and separating assembly (3) for separating double material; The moving assembly (2) includes a first adsorption assembly (21) for adsorbing sheet material and a first detection end (24), and the separating assembly (3) includes a second detection end (31). After the first adsorption assembly (21) moves the sheet material to the second detection end (31), the first adsorption assembly (21) is lowered to combine the first detection end (24) and the second detection end (31) into a whole, and the two cooperate to detect double material for the sheet material. The separating assembly (3) further includes a roller assembly (32) for transferring sheet material, a second adsorption assembly (33) slidingly arranged on the roller assembly (32), and a first lifting member (34). When double material is detected, the first lifting member (34) lifts the second adsorption assembly (33) and the roller assembly (32) together. The second adsorption assembly (33) is adsorbed on the bottom surface of the sheet material, and the roller assembly (32) is in contact with the bottom surface of the sheet material. The pressure is released, the roller assembly (32) and the second adsorption assembly (33) generate downward gravity on the lower sheet material, and the roller assembly (32) is simultaneously started to separate the upper and lower sheet materials.

2. The double material detection structure of the sheet material machine according to claim 1, wherein: The moving assembly (2) includes a first base plate member (22) and a second lifting member (23) arranged on the first base plate member (22). The first adsorption assembly (21) is arranged at the lower end of the second lifting member (23), and the first detection end (24) is slidingly arranged at the lower end of the second lifting member (23) by a hydraulic member.

3. The double material detection structure of the sheet material machine according to claim 2, characterized in that: The rack assembly (1) is provided with a linear module (11), the first base plate member (22) is arranged on the sliding block of the linear module (11), the first detection end (24) is slidingly arranged at the lower end of the lifting rod of the second lifting member (23) by a hydraulic member, and the lower end of the lifting rod of the second lifting member (23) is provided with a first limiting member (231). The separating assembly (3) includes a support table (35). When the second lifting member (23) is lowered, the first limiting member (231) is pressed against the support table (35) to limit the lowering height.

4. The double material detection structure of the sheet material machine according to claim 1, wherein: The support table (35) is provided with an interface end (351), and the lower end of the first limiting member (231) is provided with a slot hole matched with the interface end (351). When the first limiting member (231) is pressed against the support table (35), the interface end (351) is matched and communicated with the slot hole, so that the first detection end (24) and the second detection end (31) can be lifted.

5. The double material detection structure of the sheet material machine according to claim 4, characterized in that: The second detection end (31) includes an elastic and telescopic contact head (311) and a pressure sensor for detecting the contact pressure value. After the interface end (351) is matched and communicated with the slot hole, the lower end of the first detection end (24) is in contact with the upper end of the sheet material, the second detection end (31) is lifted and in contact with the lower end of the sheet material, and the pressure value on the pressure sensor is used to identify single material or double material.

6. The double material detection structure of the sheet material machine according to claim 3, characterized in that: The first adsorption assembly (21) is rotationally arranged at the lower end of the second lifting member (23) and is elastically limited by an elastic limiting member, and the support table (35) is provided with a driving member (36) for driving the first adsorption assembly (21) to rotate forward and backward.

7. The double material detection structure of the sheet material machine according to claim 6, characterized in that: The first adsorption assembly (21) is a circular ring type, and the inner ring is rotationally arranged at the lower end of the second lifting member (23), the driving member (36) includes a sliding block (361), the sliding block (361) is provided with a driving wheel (362), and the rear end of the sliding block (361) is arranged on the support table (35) through an extension member, and the sliding block (361) is pushed out to make the driving wheel (362) abut against the peripheral wall of the first adsorption assembly (21).

8. The double material detection structure of the sheet material machine according to claim 4, wherein: The roller assembly (32) includes a roller frame (321), a plurality of sliding grooves (3211) are formed in the roller frame (321), a rotating shaft (322) is elastically and slidably arranged in each sliding groove (3211), a rotating wheel (323) is rotationally arranged on the rotating shaft (322), and a belt member (324) is further arranged in the roller frame (321) to provide power, and the rotating shaft (322) is lowered, and the rotating wheel (323) on the rotating shaft (322) is pressed against the belt member (324), and then the rotating wheel (323) rotates.

9. The double material detection structure of the sheet material machine according to claim 8, characterized in that: The rotating wheel (323) rotates to drive the lower end piece to move on the roller frame (321), and when the piece leaves above the rotating wheel (323), it slides upward and is out of contact with the lower belt member (324), and stops rotating.

10. The detection process of the double material detection structure of the sheet material machine according to any one of claims 2-9, characterized in that: S1: after the first adsorption assembly (21) adsorbs the piece, it is moved to above the separation assembly (3) by the linear module (11); S2: the first detection end (24) and the second detection end (31) move to the piece, and the double material detection of the piece on the first adsorption assembly (21) is performed; S3: after detecting the double material, the second adsorption assembly (33) and the roller assembly (32) are raised to separate the double material piece.

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