Positioning device for PBT sheet shearing

Abstract

This utility model relates to the field of PBT processing and production technology, and in particular to a positioning device for cutting PBT sheets. The utility model includes a horizontally placed support frame, four support columns fixed at the four corners of the lower side of the support frame, a horizontal material-laying plate fixed inside the support frame, a clamping assembly on the horizontal material-laying plate for fixing and clamping the sheet horizontally, and a positioning assembly on the support frame for marking positioning points on the upper surface of the sheet. This device solves the problem of partially obscuring the surface position of the PBT sheet when fixing it.

Description

Technical Field

[0001] This utility model relates to the field of PBT processing and production technology, and in particular to a positioning device for cutting PBT sheets. Background Technology

[0002] PBT, due to its excellent mechanical strength and chemical resistance, is widely used in automotive bumpers, door handles, electronic components, etc. During processing, the material is first pressed into sheets, and then the sheets are cut according to actual needs. Before cutting, to determine the cutting position and shape, the operator will first make preliminary markings on the surface of the sheet for positioning. However, the following problems currently exist in the positioning operation:

[0003] 1. Current positioning devices typically clamp the sheet from both above and below when fixing it. However, this results in the sheet being partially obscured after fixing, preventing it from being fully exposed. When the cutting position is at the edge of the sheet, the operator's marking position is blocked by the clamping components. The operator can only remove the clamp and mark the line by hand on the workbench. However, because the surface of the PBT sheet is smooth, the sheet is prone to slipping during the hand-holding process, resulting in inaccurate marking.

[0004] 2. In most cases, there are multiple positioning points on a sheet of material. Currently, for multiple positioning points, the operator can only use one point as the base point and then use a ruler and auxiliary lines to determine the next positioning part. This operation is not only prone to errors, but also has low efficiency. Utility Model Content

[0005] In order to solve the above problems, the purpose of this utility model is to provide a positioning device for cutting PBT sheets, which solves the problem of obscuring part of the surface position of the sheet when fixing PBT sheets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A positioning device for cutting PBT sheet includes a horizontally placed support frame, four support columns respectively fixed at the four corners of the lower side of the support frame, a horizontal laying plate fixed inside the support frame, a clamping assembly disposed on the horizontal laying plate for fixing and clamping the sheet on the laying plate in the horizontal direction, and a positioning assembly disposed on the support frame for marking positioning points on the upper surface of the sheet.

[0008] The clamping assembly includes a pair of drive shafts rotatably mounted on the upper left and right sides of the material laying plate and vertically penetrating the upper and lower sides of the material laying plate, two clamping members fixedly mounted on the upper ends of the corresponding drive shafts, two rotating members fixedly mounted on the lower ends of the corresponding drive shafts, a control sub-assembly located below the support frame and used to synchronously control the rotating members on both sides to rotate in opposite directions, a pusher member slidably mounted on the material laying plate and located behind the clamping members, a corner insertion groove on the pusher member, a threaded sleeve fixedly mounted above the rear edge of the support frame, and a threaded control rod rotatably mounted behind the pusher member, penetrating the threaded sleeve and threadedly connected to the inner wall of the threaded sleeve.

[0009] More preferably, the control sub-assembly includes two transmission components that are rotatably disposed below the free end of the corresponding rotating component in a one-to-one correspondence with each rotating component, a bidirectional threaded rod that passes through the two transmission components in the left-right direction and is threadedly connected to the two transmission components, and two control discs that are fixed to the corresponding ends of the bidirectional threaded rod in a one-to-one correspondence with the left and right ends of the bidirectional threaded rod.

[0010] The bidirectional threaded rod is connected to the two-sided transmission components in opposite directions.

[0011] More preferably, the front left and right ends of the pusher are respectively provided with elastic push wheels.

[0012] More preferably, a rotating disk is fixed at the rear end of the threaded control rod.

[0013] More preferably, the positioning component includes a pair of vertical sliding rails respectively disposed on the upper sides of the left and right edges of the support frame and arranged in the front-back direction; a vertical positioning member slidably disposed above the material plate in the front-back direction and with its left and right ends respectively embedded in the corresponding vertical sliding rails; a transverse sliding rail disposed on the vertical positioning member and arranged in the left-right direction; a transverse sliding member slidably disposed in the transverse sliding rail; a fixed post fixed on the lower side of the transverse sliding member and extending out of the lower side of the vertical positioning member; a marking post movably disposed in the fixed post in the up-down direction and with its lower end extending out of the lower part of the fixed post; a marking head fixed on the lower end of the marking post; a fixed plate fixed in the middle section of the marking post and located in the fixed post; a plurality of push springs arranged circumferentially between the lower side of the fixed plate and the bottom of the fixed post; a vertical recording sub-assembly disposed on the left vertical sliding rail for recording the vertical position of the marking point; and a transverse recording sub-assembly disposed on the vertical positioning member for recording the transverse position of the marking point.

[0014] The upper end of the marking post extends through the horizontal sliding member in the vertical direction and extends above the vertical positioning member.

[0015] More preferably, the vertical recording sub-assembly includes a vertical limiting rail fixed on the left side of the vertical sliding rail away from the material plate and arranged in the front-back direction, a vertical slider slidably disposed in the vertical limiting rail in the front-back direction, a first marking block fixed above the vertical slider, a first indicator block fixed on the left side wall of the vertical positioning member, and a vertical scale bar disposed on the left side above the vertical sliding rail along the length direction of the vertical sliding rail.

[0016] More preferably, the lateral recording sub-assembly includes a lateral limiting rail fixed to the rear side of the vertical positioning member and arranged in the left-right direction, a lateral slider slidably arranged in the lateral limiting rail in the left-right direction, a second marking block fixed on the lateral slider, a second indicator block fixed above the rear side of the slider, and a lateral scale bar arranged above the rear side of the vertical positioning member along the length direction of the lateral sliding rail.

[0017] More preferably, a pressure plate is fixed to the upper end of the marking post.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model places the sheet on the spreading plate, applies clamping force to the front left and right side walls of the sheet through the clamping members on both sides, and applies pushing force to the rear left and right side walls of the sheet through the pushing member, so that the four sides of the sheet are respectively pushed towards the center of the sheet, thereby achieving the effect of clamping and fixing the sheet. Moreover, the clamping components ensure that the surface of the sheet is not obstructed during the clamping process, thus solving the problem of obstructing part of the surface of the sheet when fixing PBT sheet.

[0020] 2. This utility model allows the positioning column to move horizontally and vertically, enabling it to move to any position on the material board. By pressing down on the positioning column, the marking head marks the positioning point of the corresponding sheet material.

[0021] 3. This utility model uses a vertical recording sub-component and a horizontal recording sub-component to accurately mark the horizontal position of the marked positioning point, and uses vertical and horizontal scale bars to accurately determine the horizontal and vertical distance between the next positioning point and the previous positioning point, thereby driving the positioning column to accurately move to the next positioning point position for secondary marking. Attached Figure Description

[0022] Figure 1 This is an overall axonometric view of the present invention;

[0023] Figure 2 This is a partial enlarged view of point A in this utility model;

[0024] Figure 3 This is a partial enlarged view of section B of the present invention;

[0025] Figure 4This is an isolated exploded view of a clamping component according to the present invention;

[0026] Figure 5 This is an overall bottom view of the present invention;

[0027] Figure 6 This is a schematic diagram of the working state of a clamping component according to the present invention;

[0028] Figure 7 This is an isolated exploded view of a positioning component according to this utility model;

[0029] Figure 8 This is a schematic diagram of the vertical cross-sectional structure of the marking post of a positioning component of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Support frame; 2. Support column; 3. Material feeding plate; 4. Clamping assembly; 41. Drive shaft; 42. Clamping component; 43. Rotating component; 44. Control sub-assembly; 441. Transmission component; 442. Bidirectional threaded rod; 443. Control panel; 45. Material pushing component; 46. Edge insertion slot; 47. Threaded sleeve; 48. Threaded control rod; 5. Positioning assembly; 51. Vertical sliding rail; 52. Vertical positioning component; 53. Horizontal sliding rail; 54. Horizontal sliding component; 55. Fixed column; 56. Marking column; 57. Marker head; 58. Fixing plate; 59. Push spring; 510. Vertical recording sub-assembly; 5101. Vertical limiting rail; 5102. Vertical slider; 5103. First marker block; 5104. First indicator block; 5105. Vertical scale bar; 511. Horizontal recording sub-assembly; 5111. Horizontal limiting rail; 5112. Horizontal slider; 5113. Second marker block; 5114. Second indicator block; 5115. Horizontal scale bar; 6. Push wheel; 7. Rotating disk; 8. Pressing plate. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a positioning device for cutting PBT sheet in this embodiment includes a horizontally placed support frame 1, four support columns 2 respectively fixed at the four corners of the lower side of the support frame 1, a horizontal material placement plate 3 fixed inside the support frame 1, a clamping component 4 disposed on the horizontal material placement plate 3 for fixing and clamping the sheet on the material placement plate 3 in the horizontal direction, and a positioning component 5 disposed on the support frame 1 for marking positioning points on the upper surface of the sheet.

[0034] The clamping assembly 4 includes a pair of drive shafts 41 that are rotatably disposed on the left and right sides of the upper part of the material feeding plate 3 and vertically penetrate the upper and lower sides of the material feeding plate 3 respectively; two clamping members 42 that are fixedly disposed on the upper end of the corresponding drive shafts 41 in a one-to-one correspondence; two rotating members 43 that are fixedly disposed on the lower end of the corresponding drive shafts 41 in a one-to-one correspondence; a control sub-assembly 44 disposed below the support frame 1 and used to synchronously control the rotating members 43 on both sides to rotate in opposite directions respectively; a pusher member 45 that is slidably disposed on the material feeding plate 3 in a front-back direction and located behind the clamping members 42; a corner insertion groove 46 disposed on the pusher member 45; a threaded sleeve 47 fixedly disposed above the rear edge of the support frame 1; and a threaded control rod 48 that is rotatably disposed on the rear side of the pusher member 45, penetrates the threaded sleeve 47 and is threadedly connected to the inner wall of the threaded sleeve 47.

[0035] When using this product, place the sheet material on the feeding plate 3 with the edges facing upwards, and insert it between the two clamping members 42. Then, rotate the control disk 443 to drive the bidirectional threaded rod 442 to rotate. This causes the transmission member 441, which is rotatably connected to the opposite threaded sections on both sides, to move away from the support frame 1 along the corresponding thread direction. This, in turn, causes the corresponding rotating member 43, which is rotatably connected to the transmission member 441, to retract inwards in the direction away from the support frame 1. The rotational force is then transmitted to the clamping member 42 through the transmission shaft 41, thereby causing the two clamping members 42 to move in the same direction. The inward movement continuously approaches the front side strips of the sheet until the clamping members 42 on both sides simultaneously engage with the front side strips of the sheet, applying clamping force to the side strips. This causes the threaded control rod 48 to rotate, moving it forward along the thread line of the threaded sleeve 47, so that the rear corner of the sheet is inserted into the corner insertion groove 46. The left and right ends of the pusher 45 abut against the rear side strips of the sheet. At this point, the rear side strips of the sheet are pushed forward by the pusher 45, which, combined with the clamping force of the clamping members 42 on the front side strips of the sheet, achieves a stable clamping effect on the sheet. Figure 6 As shown.

[0036] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the control sub-assembly 44 includes two transmission components 441 that are rotatably disposed below the free ends of the corresponding rotating components 43 in a one-to-one correspondence with each rotating component 43, a bidirectional threaded rod 442 that passes through the two transmission components 441 in the left-right direction and is threadedly connected to the two transmission components 441, and two control disks 443 that are fixed on the corresponding ends of the bidirectional threaded rod 442 in a one-to-one correspondence with the left and right ends of the bidirectional threaded rod 442.

[0037] The threaded connection directions of the bidirectional threaded rod 442 and the two-sided transmission components 441 are reversed.

[0038] When using this product, rotating the control disc 443 causes it to drive the bidirectional threaded rod 442 to rotate. This causes the transmission components 441, which are rotatably connected to the opposite threaded sections on both sides, to move away from the support frame 1 along the corresponding thread direction. This, in turn, causes the corresponding rotating components 43, which are rotatably connected to the transmission components 441, to retract inward in the direction away from the support frame 1. The rotational force is then transmitted to the clamping components 42 through the transmission shaft 41. This causes the clamping components 42 on both sides to retract inward and continuously approach the two edge strips at the front end of the sheet until the two clamping components 42 simultaneously adhere to the left and right edge strips at the front end of the sheet, applying a clamping force to the edge strips. Figure 6 As shown.

[0039] like Figure 1 , Figure 4 and Figure 6 As shown, elastic push wheels 6 are rotatably provided at the left and right ends of the front side of the pusher 45.

[0040] When in use, this product uses the elastically driven wheel 6 to adhere to the sheet, further preventing the sheet from breaking due to hard contact between the sheet and the support.

[0041] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a rotating disk 7 is fixedly mounted at the rear end of the threaded control rod 48.

[0042] When using this product, the operator can easily rotate the threaded control rod 48 by rotating the rotating disk 7, which causes the pusher 45 to slide back and forth, applying a pushing and pressing force to the rear end of the sheet.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the positioning component 5 includes a pair of vertical sliding rails 51 respectively disposed on the upper sides of the left and right edges of the support frame 1 and arranged in the front-to-back direction; a vertical positioning member 52 slidably disposed above the material plate 3 and with its left and right ends respectively embedded in the corresponding vertical sliding rails 51; a horizontal sliding rail 53 disposed on the vertical positioning member 52 and arranged in the left-to-right direction; a horizontal sliding member 54 slidably disposed in the horizontal sliding rail 53; a fixing post 55 fixed to the lower side of the horizontal sliding member 54 and extending out of the lower side of the vertical positioning member 52; and a vertically movable component 55. The marking post 56 is movably installed inside the fixed post 55 and extends out of the bottom of the fixed post 55; the marking head 57 is fixed at the bottom of the marking post 56; the fixing plate 58 is fixed in the middle section of the marking post 56 and located inside the fixed post 55; several push springs 59 are arranged circumferentially between the bottom of the fixing plate 58 and the bottom of the fixed post 55; the vertical recording sub-assembly 510 is provided on the left vertical sliding rail 51 and is used to record the vertical position of the marking point; and the horizontal recording sub-assembly 511 is provided on the vertical positioning member 52 and is used to record the horizontal position of the marking point.

[0044] The upper end of the marker post 56 extends through the horizontal sliding member 54 in the vertical direction and extends above the vertical positioning member 52.

[0045] When in use, this product moves the marking post 56 in the front-back direction by pushing and pulling the vertical positioning part 52 back and forth, and moves it in the left and right direction by pushing and pulling the marking post 56 left and right along the horizontal sliding track 53, so that the marking head 57 can move to any position above the sheet and mark any position.

[0046] like Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the vertical recording sub-assembly 510 includes a vertical limiting rail 5101 fixed on the left side of the vertical sliding rail 51 away from the material plate 3 and arranged in the front-back direction, a vertical slider 5102 slidably disposed in the vertical limiting rail 5101 in the front-back direction, a first marking block 5103 fixed above the vertical slider 5102, a first indicator block 5104 fixed on the left side wall of the vertical positioning member 52, and a vertical scale bar 5105 disposed on the upper left side of the vertical sliding rail 51 along the length direction of the vertical sliding rail 51.

[0047] When using this product, according to the required vertical spacing, push and pull the vertical positioning piece 52 back and forth so that it slides back and forth along the vertical sliding tracks 51 on both sides. By reading the length spacing represented by the vertical scale bar 5105 between the first throwing stone block 5104 and the first marking block 5103, the vertical spacing is calculated accordingly. At this time, the marking head 57 and the next positioning point are on the same horizontal axis.

[0048] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the horizontal recording sub-assembly 511 includes a horizontal limiting rail 5111 fixed to the rear side of the vertical positioning member 52 and arranged in the left-right direction, a horizontal slider 5112 slidably arranged in the horizontal limiting rail 5111 in the left-right direction, a second marking block 5113 fixed on the horizontal slider 5112, a second indicator block 5114 fixed above the rear side of the slider, and a horizontal scale bar 5115 arranged above the rear side of the vertical positioning member 52 along the length direction of the horizontal sliding rail 53.

[0049] When using this product, according to the required horizontal spacing, push and pull the marker post 56 left and right, so that it drives the horizontal sliding member 54 to slide in the left and right direction. By reading the length spacing represented by the horizontal scale bar 5115 between the second indicator block 5114 and the second marker block 5113, the horizontal spacing is calculated accordingly. At this time, the marker head 57 and the next positioning point are on the same front and back vertical axis.

[0050] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a pressure plate 8 is fixed to the upper end of the marking post 56.

[0051] When in use, this product increases the area on which the operator applies force through the pressure plate 8, making it easier for the operator to apply force and push the positioning column 56 downward.

[0052] The working principle of this device is as follows:

[0053] Step 1: Place the sheet material on the placement plate 3 with the edges facing upwards, insert it between the two clamping members 42, and then rotate the control disk 443 to drive the bidirectional threaded rod 442 to rotate. This causes the transmission member 441, which is rotatably connected to the opposite threaded sections on both sides, to move away from the support frame 1 along the corresponding thread direction. This causes the corresponding rotating member 43, which is rotatably connected to the transmission member 441, to retract inward in the direction away from the support frame 1. The rotational force is transmitted to the clamping member 42 through the transmission shaft 41, thereby causing the two clamping members 42 to retract inward and continuously approach the two front edge strips of the sheet until the two clamping members 42 simultaneously adhere to the left and right front edge strips of the sheet, applying a clamping force to the two edge strips. Figure 6 As shown.

[0054] Step 2: Rotate the rotating disk 7, causing the threaded control rod 48 to rotate and move forward along the thread line of the threaded sleeve 47, so that the rear corner of the sheet is inserted into the corner insertion groove 46, and the elastic push wheels 6 connected to the left and right ends abut against the side strips on both sides of the rear end of the sheet. At this time, the left and right side strips on the rear end of the sheet are pushed forward by the push wheels 6 on both sides, which cooperates with the clamping force of the clamping member 42 on the side strips on both sides of the front end of the sheet to achieve the effect of firmly clamping the sheet. Figure 6 As shown.

[0055] Step 3: The operator first manually determines the first positioning point on the surface of the sheet. Then, the operator holds the marker post 56 and moves the marker head 57 to the corresponding first positioning point by pulling it back and forth and left and right. Then, the operator pushes and pulls the first marker block 5103 back and forth, so that it slides along the vertical limiting track 5101 to the position corresponding to the first indicator block 5104, thus determining the front and back position of the first positioning point. The operator pushes and pulls the second marker block 5113 left and right, so that it slides along the horizontal limiting track 5111 to the position corresponding to the second indicator block 5114, thus determining the left and right position of the first positioning point. At this time, the position corresponding to the first marker block 5103 and the second marker block 5113 is the first positioning point referenced by the next positioning point. At this time, the operator calculates the horizontal and vertical distance between the next positioning point and the first positioning point.

[0056] Step 4: Based on the required horizontal spacing, push and pull the marker post 56 left and right, so that it drives the horizontal slider 54 to slide in the left and right direction. By reading the length of the horizontal scale bar 5115 between the second indicator block 5114 and the second marker block 5113, the horizontal spacing is calculated accordingly. At this time, the marker head 57 and the next positioning point are on the same front and back vertical axis.

[0057] Step 5: Based on the required vertical spacing, push and pull the vertical positioning piece 52 back and forth so that it slides back and forth along the vertical sliding tracks 51 on both sides. By reading the length spacing represented by the vertical scale bar 5105 between the first throwing stone block 5104 and the first marker block 5103, the vertical spacing is calculated accordingly. At this time, the marker head 57 and the next positioning point are on the same horizontal axis.

[0058] Step 6: Through steps 4 and 5, the marker head 57 is moved vertically above the next marker point. At this time, the operator presses the pressing plate 8, which causes the marker post 56 to move down, causing each push spring 59 to be squeezed and compressed by the fixing plate 58. The marker head 57 is pushed out by the downward pressure and hits the next positioning point, leaving a mark, thus achieving the effect of marking the positioning point.

[0059] Step 7: Repeat steps 3 through 6 to complete the marking and positioning of all positioning points.

[0060] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning device for cutting PBT sheets, characterized in that: It includes a horizontally placed support frame (1), four support columns (2) respectively fixed at the four corners of the lower side of the support frame (1), a horizontal material laying plate (3) fixed inside the support frame (1), a clamping component (4) set on the horizontal material laying plate (3) and used to fix and clamp the sheet material on the material laying plate (3) in the horizontal direction, and a positioning component (5) set on the support frame (1) and used to mark the positioning points on the upper surface of the sheet material; The clamping assembly (4) includes a pair of drive shafts (41) rotatably mounted on the upper left and right sides of the material laying plate (3) and vertically penetrating the upper and lower sides of the material laying plate (3) respectively; two clamping members (42) fixedly mounted on the upper end of the corresponding drive shafts (41) in a one-to-one correspondence; two rotating members (43) fixedly mounted on the lower end of the corresponding drive shafts (41) in a one-to-one correspondence; and a clamping member (42) located below the support frame (1) for synchronization. The control sub-assembly (44) controls the rotation of the two rotating parts (43) in opposite directions, the pusher (45) is slidably disposed on the material release plate (3) and located behind the clamping part (42) in the front-back direction, the corner insertion groove (46) is disposed on the pusher (45), the threaded sleeve (47) is fixed above the rear edge of the support frame (1), and the threaded control rod (48) is rotatably disposed on the rear side of the pusher (45), passes through the threaded sleeve (47) and is threadedly connected to the inner wall of the threaded sleeve (47).

2. The positioning device for PBT sheet shearing according to claim 1, characterized in that: The control sub-assembly (44) includes two transmission components (441) that are rotatably disposed below the free end of the corresponding rotating component (43) in a one-to-one correspondence with each rotating component (43), a bidirectional threaded rod (442) that passes through the two transmission components (441) in the left-right direction and is threadedly connected to the two transmission components (441), and two control disks (443) that are fixed on the corresponding ends of the bidirectional threaded rod (442) in a one-to-one correspondence with the left and right ends of the bidirectional threaded rod (442); The bidirectional threaded rod (442) and the two-sided transmission components (441) are connected in opposite directions.

3. The positioning device for PBT sheet shearing according to claim 1, characterized in that: The pusher (45) has elastic push wheels (6) rotatably mounted on the left and right ends of its front side.

4. The positioning device for PBT sheet shearing according to claim 1, characterized in that: The threaded control rod (48) has a rotating disk (7) fixed at its rear end.

5. The positioning device for PBT sheet shearing according to claim 1, characterized in that: The positioning component (5) includes a pair of vertical sliding rails (51) respectively disposed on the upper sides of the left and right edges of the support frame (1) and arranged in the front-back direction; a vertical positioning member (52) slidably disposed above the material plate (3) and with its left and right ends respectively embedded in the corresponding vertical sliding rails (51); a horizontal sliding rail (53) disposed on the vertical positioning member (52) and arranged in the left-right direction; a horizontal sliding member (54) slidably disposed in the horizontal sliding rail (53); a fixing post (55) fixed on the lower side of the horizontal sliding member (54) and extending out of the lower side of the vertical positioning member (52); and a vertically movable component (55) slidably disposed in the vertical direction. The marking post (56) is set inside the fixed post (55) and extends out of the bottom of the fixed post (55); the marking head (57) is fixed at the bottom of the marking post (56); the fixing plate (58) is fixed in the middle section of the marking post (56) and located inside the fixed post (55); several push springs (59) are arranged circumferentially between the bottom of the fixing plate (58) and the bottom of the fixed post (55); the vertical recording sub-assembly (510) is set on the left vertical sliding rail (51) and used to record the vertical position of the marking point; and the horizontal recording sub-assembly (511) is set on the vertical positioning member (52) and used to record the horizontal position of the marking point. The upper end of the marker post (56) extends through the horizontal sliding member (54) in the vertical direction and extends above the vertical positioning member (52).

6. The positioning device for PBT sheet shearing according to claim 5, characterized in that: The vertical recording sub-assembly (510) includes a vertical limiting rail (5101) fixed on the left side of the vertical sliding rail (51) away from the material plate (3) and arranged in the front-back direction, a vertical slider (5102) slidably arranged in the vertical limiting rail (5101) in the front-back direction, a first marking block (5103) fixed above the vertical slider (5102), a first indicator block (5104) fixed on the left side wall of the vertical positioning member (52), and a vertical scale bar (5105) arranged on the left side above the vertical sliding rail (51) along the length direction of the vertical sliding rail (51).

7. The positioning device for PBT sheet shearing according to claim 5, characterized in that: The horizontal recording sub-assembly (511) includes a horizontal limiting rail (5111) fixed to the rear side of the vertical positioning member (52) and arranged in the left-right direction, a horizontal slider (5112) slidably arranged in the horizontal limiting rail (5111) in the left-right direction, a second marking block (5113) fixed on the horizontal slider (5112), a second indicator block (5114) fixed above the rear side of the slider, and a horizontal scale bar (5115) arranged above the rear side of the vertical positioning member (52) along the length direction of the horizontal sliding rail (53).

8. The positioning device for PBT sheet shearing according to claim 5, characterized in that: A pressure plate (8) is fixed to the upper end of the marking post (56).

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