A blank measuring tray

Abstract

The present invention discloses a blank measurement tray, comprising a reference plate and a clamp. The reference plate is mounted on the bottom of the clamp and is used to dock with the reference chuck of a machining center. A front support wall and a rear support wall are provided on the top of the clamp. A center scale is provided on the top of the rear support wall. A guide rail is provided on the rear side surface. A slider is provided on the guide rail. A left measuring ruler and a right measuring ruler are located above the rear support wall and fixed on the slider. A guide groove is provided on the top of the front support wall. The front measuring ruler is inserted into the guide groove. During operation, the blank is mounted on the clamp, close to the rear support wall, and then the left and right measuring rulers are pushed close to the sides of the blank to read the positions of the left and right sides of the blank. The front measuring ruler is then pressed against the blank to read the position of the front side of the blank. The present invention allows the blank measurement work to be completed outside the machining center, eliminating the blank measurement process on the machining center, greatly simplifying the working steps of the machine tool operator, and improving the utilization rate of the machine tool.

Description

Technical Field

[0001] The invention belongs to the field of measuring devices, in particular to a blank measuring tray. Background Art

[0002] In CNC machining, the actual position of the blank in the machine tool needs to be measured before starting machining. There are currently two measurement methods:

[0003] The first method is "on-machine measurement," commonly known as "tool setting." This involves first mounting the blank on the machine tool and then using a tool or a specialized probe to sequentially contact the four sides and top of the blank to determine its position on the machine. The disadvantage of this method is that it requires machine tool operation time, reducing machine utilization and increasing the workload of the machine operator.

[0004] The second method involves "online measurement" performed on a flexible manufacturing line. This method uses the on-line coordinate measuring equipment to measure the position of the workpiece relative to the zero-point quick-change fixture. Through system conversion, the workpiece's position on the machining center is determined. This method eliminates the need for positioning the workpiece on the machining center, improving machine tool utilization. However, its drawbacks are high production line investment costs and the use of valuable precision measuring equipment, making it difficult to implement in small businesses. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a blank measuring pallet (a fixture capable of measuring the blank) used in an off-machine blank measuring device, so that the position of the blank can be determined even when it is separated from the machining center.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is:

[0007] A blank measuring pallet, comprising a reference piece and a clamp, wherein the reference piece is mounted on the bottom of the clamp for docking with the reference chuck of a machining center; a front support wall is provided at the top front end of the clamp, and a rear support wall is provided at the top rear end of the clamp, and the front support wall and the rear support wall are transitionally connected via a bottom positioning surface; the front side surface of the rear support wall is the rear positioning surface of the pallet; the upper surface of the rear support wall is provided with a center scale in the X direction, and the rear side surface of the rear support wall is provided with an X-direction guide rail, and two sliders are provided on the guide rail, and the rear ends of the left measuring ruler and the right measuring ruler are respectively fixed on a slider, and the left measuring ruler and the right measuring ruler are located at the top of the rear supporting wall and can be driven by the slider The lower edge of the center scale moves; the left measuring ruler and the right measuring ruler are provided with a contact surface and an indicator line, the indicator line is located above the scale line of the center scale, and the contact surface is located in front of the rear positioning surface. The contact surface and the indicator line of the left measuring ruler are coplanar along the Y direction, and the contact surface and the indicator line of the right measuring ruler are coplanar along the Y direction. The contact surfaces of the left measuring ruler and the right measuring ruler are used to clamp the left and right sides of the blank respectively; a guide groove is provided at the top center position of the front supporting wall, and the front measuring ruler is inserted into the guide groove along the Y direction and can slide in the guide groove. A fixed indicator line is provided on the upper surface of the front supporting wall, and the scale on the front measuring ruler aligned with the fixed indicator line is equal to the distance from the front end of the front measuring ruler to the rear positioning surface.

[0008] Four positioning grooves are provided at the bottom of the reference plate, two of which are located on the X-axis centerline of the reference plate, and the other two positioning grooves are located on the Y-axis centerline of the reference plate. The positioning grooves are used to dock with the positioning blocks on the reference chuck; the bottom surface of the reference plate is the XY plane of the pallet, and the center of the two X-axis collinear positioning grooves and the plane perpendicular to the XY plane constitute the XZ plane of the pallet, and the center of the two Y-axis collinear positioning grooves and the plane perpendicular to the XY plane constitute the YZ plane of the pallet. The intersection of the XY plane, the XZ plane and the YZ plane is the reference center of the pallet.

[0009] The bottom positioning surface is parallel to the XY plane, and the rear positioning surface is parallel to the XZ plane.

[0010] The position scale line of the center scale coincides with the YZ plane.

[0011] The slider is provided with a locking bolt, which can lock the slider on the guide rail.

[0012] The plane where the indicating lines on the left measuring ruler and the right measuring ruler are located is an inclined plane.

[0013] The bottom of the guide groove is higher than the upper surface of the rear supporting wall, and the inner surface of the guide groove adopts a rounded transition.

[0014] A threaded through hole in the Y direction is provided on the front supporting wall, and an external thread matching the threaded through hole is provided on the fastening screw. The fastening screw passes through the threaded through hole and is used to press the blank against the rear positioning surface.

[0015] The end of the front measuring ruler with a larger scale number is its front end, and the upper surface of the front measuring ruler and the upper surface of the front supporting wall are located on the same plane.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The blank measuring tray provided by the present invention is used to mount the blank on the clamp during operation, and to place it close to the rear positioning surface. The position of the rear positioning surface of the clamp is the position of the rear side surface of the blank. The left measuring ruler and the right measuring ruler are pushed so that their contact surfaces are close to the side surfaces of the blank. The positions of the left and right side surfaces of the blank can be read through the indicator lines on the left and right measuring rulers. The front measuring ruler is then inserted into the guide groove, and its front end is pressed against the blank. The position of the front side surface of the blank is read through the fixed indicator lines. The position of the top of the blank can be determined by measuring the distance from the top of the blank to the bottom of the tray. The blank measuring tray provided by the present invention can enable the measurement of the blank to be completed outside the machining center, eliminating the measurement process of the blank on the machining center, greatly simplifying the working steps of the machine tool operator, and improving the utilization rate of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] In the attached figure:

[0020] Figure 1 It is the front view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 A bottom view of the present invention;

[0023] Figure 4 It is a left side view of the present invention;

[0024] Figure 5 It is a right side view of the present invention;

[0025] Figure 6 for Figure 2 A partial enlarged view of point I in the middle;

[0026] Figure 7 for Figure 2 A partial enlarged view of position II in the middle;

[0027] Figure 8for Figure 4 A partial enlarged view of point III in the middle;

[0028] Figure 9 Schematic diagram of the structure of the reference piece in the present invention;

[0029] Figure 10 Schematic diagram of the structure of the bottom of the reference piece in the present invention;

[0030] Figure 11 Schematic diagram of the structure of the clamper in the present invention;

[0031] Figure 12 This is a diagram showing the measurement principle of the front measuring ruler in the present invention;

[0032] Figure 13 Schematic diagram of the structure of the measuring ruler and the slider in the present invention;

[0033] Figure 14 A schematic diagram of the position of the programming origin M selected in the digital model of the present invention;

[0034] Figure 15 This is a schematic diagram of the position of the machining origin N selected on the reference chuck of the machining center of the present invention;

[0035] Figure 16 A schematic diagram of the principle of determining the position of a blank according to the present invention;

[0036] Figure 17 A schematic diagram of establishing a blank on a digital model of a fixture according to the present invention;

[0037] In the figure: 1-reference plate; 2-clamp; 3-fastening screw; 4-front support wall; 5-front measuring ruler; 6-rear positioning surface; 7-rear support wall; 8-screw; 9-slider; 10-center scale; 11-locking bolt; 12-left measuring ruler; 13-guide rail; 14-right measuring ruler; 15-positioning groove; 16-contact surface; 17-indicator line; 18-fixed indicator line; 19-bottom positioning surface; 20-guide groove; 21-XZ plane; 22-YZ plane; 23-XY plane; 24-threaded through hole; 25-blank; 26-reference chuck; 27-positioning block; 28-limiting column. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings.

[0039] like Figure 1-13 As shown, the blank measuring tray provided by the present invention includes a reference plate 1, a clamper 2, a front measuring ruler 5, a slider 9, a scale 10, a left measuring ruler 12, a right measuring ruler 14 and a guide rail 13.

[0040] The reference sheet 1 (see Figure 9 and Figure 10 ) is mounted on the bottom of the clamp 2 and is used to dock with the reference chuck 26 on the machining center. The bottom of the reference plate 1 is provided with four positioning grooves 15, two of which are located on the X-axis centerline of the reference plate 1, and the other two positioning grooves 15 are located on the Y-axis centerline of the reference plate 1. The positioning grooves 15 are used to quickly dock with the positioning blocks 27 on the reference chuck 26. The bottom of the reference plate 1 forms the XY plane 23 of the pallet. The plane passing through the centers of a pair of X-axis collinear positioning grooves 15 and perpendicular to the XY plane 23 forms the XZ plane 21 of the pallet. The plane passing through the centers of another pair of Y-axis collinear positioning grooves 15 and perpendicular to the XY plane 23 forms the YZ plane 22 of the pallet. The intersection of the XY plane 23, the XZ plane 21, and the YZ plane 22 forms the pallet's reference center.

[0041] Machining center reference chuck 26 (see Figure 15 ) are provided with equal-height limit posts 28 at the four corners of the base plate 1. The base plate 1 is provided with four positioning blocks 27, the height of which is slightly higher than that of the limit posts 28. Two of the positioning blocks 27 are located on the X-axis centerline of the base plate 1, and the other two are located on the Y-axis centerline of the base plate 1. The X-axis and Y-axis of the base plate 1 are parallel to the X-axis and Y-axis of the base plate 1, respectively. The upper surfaces of all the limit posts 28 on the base plate 26 constitute the XY plane of the base plate 1; the plane passing through the centers of a pair of collinear positioning blocks 27 on the X-axis and perpendicular to the XY plane constitutes the XZ plane of the base plate 1; and the plane passing through the centers of another pair of collinear positioning blocks 27 on the Y-axis and perpendicular to the XY plane constitutes the YZ plane of the base plate 1. The intersection of the XY, ZX, and ZY planes of the base plate 1 is the base center of the base plate 1. When the pallet is mounted on the reference chuck 26, the bottom surface of the reference plate 1 is located on the limit column 28, the top of the positioning block 27 is stuck in the positioning groove 15, and the pallet's reference center, XY plane 23, XZ plane 21 and YZ plane 22 coincide with the reference center of the reference chuck 26 and the three planes of XY, ZX and ZY respectively.

[0042] The holder 2 (see Figure 11) is provided with a front support wall 4 at the top front end, and a rear support wall 7 is provided at the top rear end of the clamper 2. The front support wall 4 and the rear support wall 7 are transitionally connected by a bottom positioning surface 19. The bottom positioning surface 19 is parallel to the XY plane 23. The blank 25 is placed on the bottom positioning surface 19 for measurement. The front side surface (inner side surface) of the rear support wall 7 is the rear positioning surface 6. The rear positioning surface 6 is parallel to the XZ plane 21. The bottom positioning surface 19 is perpendicular to the rear positioning surface 6. The upper surface of the rear support wall 7 is provided with a center scale 10. The length direction of the center scale 10 is perpendicular to the YZ plane 22 of the pallet, and is parallel to the XZ plane 21 and the XY plane 23. The 0-position scale line of the center scale 10 coincides with the YZ plane 22. A guide rail 13 is provided on the outer side surface (rear side surface) of the rear support wall 7. The direction of the guide rail 13 is perpendicular to the YZ plane 22 and parallel to the XZ plane 21 and the XY plane 23. A slider 9 is provided on the guide rail 13. The left measuring ruler 12 and the right measuring ruler 14 are fastened to the slide block 9 by screws 8 and can slide along the guide rail 13 .

[0043] The left measuring ruler 12 and the right measuring ruler 14 are located on the top of the rear support wall 7 and are mounted on the slider 9 by screws 8 (see Figure 13 ). The slider 9 can slide on the guide rail 13, thereby driving the left measuring ruler 12 and the right measuring ruler 14 to slide on the top of the rear support wall 7. The slider 9 can be locked on the guide rail 13 by the locking bolt 11. The left measuring ruler 12 and the right measuring ruler 14 are symmetrical to each other. A contact surface 16 and an indicator line 17 are provided on the left measuring ruler 12 and the right measuring ruler 14. The contact surface 16 is located in front of the rear positioning surface 6. The contact surface 16 and the indicator line 17 of the left measuring ruler 12 are coplanar and parallel to the YZ plane 22. The contact surface 16 and the indicator line 17 of the right measuring ruler 14 are coplanar and parallel to the YZ plane 22. The contact surfaces 16 of the left measuring ruler 12 and the right measuring ruler 14 respectively clamp the left and right sides of the blank 25 for jointly clamping and measuring the blank 25. The indicator line 17 is located above the center scale 10. The plane where the indicator line 17 is located is an inclined surface with a very small edge thickness, which makes it easy to observe the scale value of the center scale 10 indicated by the indicator line 17. The sum of the scale values ​​of the center scale 10 indicated by the indicator lines 17 of the left measuring ruler 12 and the right measuring ruler 14 is the width of the blank 25 .

[0044] A guide slot 20 is defined at the top center of the front support wall 4. The guide slot 20 is oriented perpendicular to the pallet's XZ plane 21. The front measuring ruler 5 is inserted into the guide slot 20. A fixed indicator line 18 is defined on the top surface of the front support wall 4. The bottom of the guide slot 20 is elevated above the top surface of the rear support wall 7 for ease of manufacturing. The interior of the guide slot 20 features rounded corners for easier cleaning. A threaded through-hole 24 is defined in the front support wall 4, parallel to the YZ plane 22. The fastening screw 3 has external threads that match the threaded through-hole 24. The fastening screw 3 passes through the threaded through-hole 24 and is used to press the blank 25 against the rear positioning surface 6.

[0045] The front measuring ruler 5 can slide in the guide groove 20 of the clamp 2, and the end of the front measuring ruler 5 with the larger scale is its front end. The scale on the front measuring ruler 5 aligned with the fixed indicator line 18 is equal to the distance from the front end of the front measuring ruler 5 to the rear positioning surface 6. The correspondence between the scale of the front measuring ruler 5 and the fixed indicator line 18 can reflect the distance between the front end of the front measuring ruler 5 and the rear positioning surface 6. The upper surface of the front measuring ruler 5 and the upper surface of the front support wall 4 are located on the same plane, which is convenient for reading the scale value. Figure 12 As shown, when the scale 1 of the front measuring ruler is aligned with the fixed indicator line 18, the distance s between the front end of the front measuring ruler 5 and the rear positioning surface 6 is 10 mm. When the screw 3 is tightened to press the blank 25 against the rear positioning surface 6, the front end of the front measuring ruler 5 contacts the blank 25. At this time, the scale value on the front measuring ruler 5 that aligns with the fixed indicator line 18 is the thickness of the blank 25.

[0046] During operation, first install the rectangular blank 25 vertically on the bottom positioning surface 19 of the clamp 2 and tighten the blank 25 against the rear positioning surface 6 using the fastening screws 3. The position of the rear positioning surface 6 of the clamp 2 corresponds to the position of the rear side of the blank 25. Move the left and right measuring rulers 12 and 14 against the left and right sides of the blank 25, respectively. Read the positions of the left and right sides of the blank 25 using the indicator lines 17 on the left and right measuring rulers 12 and 14. Then, insert the front measuring ruler 5 into the guide groove 20 and press it against the blank 25. Read the position of the front side of the blank 25 using the fixed indicator lines 18. The position of the top of the blank 25 can be determined by measuring the distance from the top of the blank 25 to the bottom of the pallet, eliminating the need to measure the blank 25 on the machining center.

[0047] The specific measurement process of the blank measuring tray of the present invention is given below.

[0048] First, select a specific point M on the digital model as the programming origin (see Figure 14 ). Note the distance of this point relative to the pallet reference center (ΔXM, ΔYM, ΔZM). Then use a special tool T0 (such as a photoelectric probe or a centering rod) on the machining center to determine a machining origin N (see Figure 15The distances (ΔXN, ΔYN, ΔZN) between the machining origin N and the pallet reference center are aligned with the distances (ΔXM, ΔYM, ΔZM) in the digital model. Once the locations of the specific point M and the machining origin N are determined, they remain fixed and serve as the programming and machining origins for all subsequent cases.

[0049] When working, first install the rectangular blank 25 vertically on the tray and tighten it with the fastening screws 3 (see Figure 16 ). Push the left and right measuring rulers 12 and 14 until the contact surface 16 is against the blank 25, and tighten the locking bolt 11 on the slider 9. Record the markings on the center scale 10 corresponding to the indicator lines 17 on the left and right measuring rulers 12 and 14. These two markings represent the distances from the pallet's YZ plane 22 to the left and right sides of the blank 25, respectively. Then, insert the front measuring ruler 5 into the guide groove 20 and hold it against the blank 25. Record the marking on the front measuring ruler 5 corresponding to the fixed indicator line 18. This marking represents the distance from the pallet's rear positioning surface 6 to the front side of the blank 25.

[0050] The position of the rear side of the blank 25 corresponds to the location of the rear positioning surface 6 of the gripper 2 and does not need to be measured. The top of the blank 25 can be measured using other measuring tools. Specifically, the height of the top of the blank relative to the bottom of the tray (XY plane 23) is measured. In this way, the positions of the left, right, front, back, and top surfaces of the blank are determined.

[0051] According to the above measurement results, a digital model of the blank is established on the CAD software (see Figure 17 ). Programming is performed with a specific point M in the digital model as the programming origin.

[0052] After the compiled program is input into the machine tool, processing can begin as long as the length compensation (i.e. the length difference between the tool and the special tool T0) is set in the tool list of the machine tool.

[0053] The above is a further detailed description of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to this; for technical personnel in the technical fields to which the present invention belongs and related technical fields, based on the technical solution ideas of the present invention, the expansion and replacement of operating methods and data should all fall within the scope of protection of the present invention.

Claims

1. A blank measuring tray, characterized by: The invention comprises a reference plate (1) and a clamp (2), wherein the reference plate (1) is mounted on the bottom of the clamp (2) and is used to dock with a reference chuck (26) of a machining center; a front support wall (4) is provided at the top front end of the clamp (2), and a rear support wall (7) is provided at the top rear end of the clamp (2), and the front support wall (4) and the rear support wall (7) are transitionally connected via a bottom positioning surface (19); the front side surface of the rear support wall (7) is a rear positioning surface (6) of a pallet; the upper surface of the rear support wall (7) is provided with an X-direction center scale (10), and the rear side surface of the rear support wall (7) is provided with an X-direction guide rail (13), and the guide rail (13) is provided with two sliders (9), a left measuring ruler (12) and a right measuring ruler (1 4) are fixed on a slider (9), the left measuring ruler (12) and the right measuring ruler (14) are located on the top of the rear support wall (7), and can move along the center scale (10) driven by the slider (9); the left measuring ruler (12) and the right measuring ruler (14) are provided with a contact surface (16) and an indicator line (17), the indicator line (17) is located above the scale line of the center scale (10), the contact surface (16) is located in front of the rear positioning surface (6), the contact surface (16) and the indicator line (17) of the left measuring ruler (12) are coplanar along the Y direction, the contact surface (16) and the indicator line (17) of the right measuring ruler (14) are coplanar along the Y direction, and the contact surface (16) of the left measuring ruler (12) and the right measuring ruler (14) are coplanar along the Y direction. 6) are used to clamp the left and right sides of the blank (25) respectively; a guide groove (20) is provided at the center position of the top of the front support wall (4), the front measuring ruler (5) is inserted into the guide groove (20) along the Y direction and can slide in the guide groove (20), the upper surface of the front support wall (4) is provided with a fixed indicator line (18), and the scale on the front measuring ruler (5) aligned with the fixed indicator line (18) is equal to the distance from the front end of the front measuring ruler (5) to the rear positioning surface (6); the bottom of the reference plate (1) is provided with four positioning grooves (15), two of which are located on the X-axis center line of the reference plate (1), and the other two positioning grooves (15) are located on the Y-axis center line of the reference plate (1), and the positioning grooves (15) are used to align with the reference chuck The positioning block (27) on (26) is docked; the bottom surface of the reference piece (1) is the XY plane (23) of the pallet, the center of the two X-axis colinear positioning grooves (15) and the plane perpendicular to the XY plane (23) constitute the XZ plane (21) of the pallet, the center of the two Y-axis colinear positioning grooves (15) and the plane perpendicular to the XY plane (23) constitute the YZ plane (22) of the pallet, and the intersection of the XY plane (23), the XZ plane (21) and the YZ plane (22) is the reference center of the pallet; the bottom positioning surface (19) is parallel to the XY plane (23), and the rear positioning surface (6) is parallel to the XZ plane (21); the (0) position scale line of the center scale (10) coincides with the YZ plane (22).

2. The blank measuring tray according to claim 1, characterized in that: The slider (9) is provided with a locking bolt (11), and the slider (9) can be locked on the guide rail (13) by the locking bolt (11).

3. The blank measuring tray according to claim 1, characterized in that: The plane on which the indicator lines (17) on the left measuring ruler (12) and the right measuring ruler (14) are located is an inclined plane.

4. The blank measuring tray according to claim 1, characterized in that: The bottom of the guide groove (20) is higher than the upper surface of the rear support wall (7), and the inner surface of the guide groove (20) adopts a rounded transition.

5. The blank measuring tray according to claim 1, characterized in that: The front support wall (4) is provided with a threaded through hole (24) in the Y direction, and the fastening screw (3) is provided with an external thread matching the threaded through hole (24). The fastening screw (3) passes through the threaded through hole (24) and is used to press the blank (25) against the rear positioning surface (6).

6. The blank measuring tray according to claim 1, characterized in that: The end of the front measuring ruler (5) with a larger scale number is its front end, and the upper surface of the front measuring ruler (5) and the upper surface of the front supporting wall (4) are located on the same plane.

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