Composite datum stamping pallet

Abstract

This invention relates to the field of composite reference stamping tray technology, specifically to a composite reference stamping tray, comprising a positioning base, positioning reference blocks, a side self-locking positioning mechanism, and a die. The positioning reference blocks are matrix-distributed and detachably mounted on the upper surface of the positioning base. A horizontally positioned R-shaped positioning base is located at the center of the upper surface of the positioning base. The side self-locking positioning mechanism is located on one side of the R-shaped positioning base. The die is horizontally mounted on all the positioning reference blocks. The bottom of the die has a vertical insert plate that can be inserted into the R-shaped positioning base. The side self-locking positioning mechanism includes two positioning ball heads that can abut against the sides of the die, causing the die to move towards the R-shaped positioning base. This technical solution provides a composite reference stamping tray that uses a 3-2-1 positioning principle to effectively position the die, thereby effectively constraining the die position during production and improving batch production accuracy.

Description

Technical Field

[0001] This invention relates to the field of composite reference stamping pallet technology, specifically to a composite reference stamping pallet. Background Technology

[0002] The composite reference stamping tray is designed and manufactured to improve the forming accuracy of sound-absorbing cotton die-cutting. It is used in the mass production process of products. During the production process, it can effectively position the die-cutting position, thereby improving the consistency of batch production and thus improving product accuracy. It is designed with a die-cutting guide and positioning structure, and only one person is needed in actual operation, simplifying the process.

[0003] In the sound-absorbing cotton production process, the positioning stamping tray is mainly used in the sound-absorbing cotton processing and forming process to support and position the die. It mainly consists of an R-shaped positioning base, a positioning reference block, an arc-shaped slide rail and a side self-locking positioning block. During the production process, the die is placed on the tray and positioned by the positioning element.

[0004] Previously, the stamping tray used for die-cutting was only a flat surface. Due to factors such as manual loading, mechanical vibration, and inconsistent die sizes, the position of the semi-finished product would change with each cut, leading to problems such as poor product consistency, low product precision, frequent manual adjustments, and incomplete product cutting. Therefore, we proposed a composite reference stamping tray to solve the aforementioned problems. Summary of the Invention

[0005] To solve the above technical problems, a composite reference stamping tray is provided. This technical solution provides a composite reference stamping tray, which adopts the 3-2-1 positioning principle to effectively position the die, thereby effectively constraining the die position during the production process and improving the accuracy of mass production.

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

[0007] A composite reference stamping tray includes a positioning base, positioning reference blocks, a side self-locking mechanism, and a die. The positioning reference blocks are distributed in a matrix and detachably mounted on the upper surface of the positioning base. An R-shaped positioning base is horizontally positioned at the center of the upper surface of the positioning base. The side self-locking mechanism is located on one side of the R-shaped positioning base. The die is horizontally mounted on all the positioning reference blocks. The bottom of the die has a vertical insert plate that can be inserted into the R-shaped positioning base. The side self-locking mechanism includes two positioning ball heads that can abut against the side of the die and move the die toward the R-shaped positioning base.

[0008] Preferably, the number of positioning reference blocks is an integer multiple of 4, and every four blocks form a positioning reference block group. The line connecting the four positioning reference blocks in each positioning reference block group forms a square. The positioning reference blocks in all reference block groups are installed radially on the positioning base, and the positioning reference blocks in all positioning reference block groups are located on the diagonal line connecting the largest square.

[0009] Preferably, each of the positioning reference blocks includes a positioning pin and a bolt. The positioning pin has a circular through-hole that passes through the top and bottom. The bolt is rotatably disposed in the circular through-hole. The upper and lower ends of the circular through-hole are respectively provided with sealing rings for blocking the top of the bolt. The positioning base is provided with a first screw hole for threaded connection of each bolt.

[0010] Preferably, the vertical insert plate includes a vertically arranged long guide bar, which can engage with the R-shaped groove and restrict the horizontal rotation and XZ axis movement freedom of the die.

[0011] Preferably, the side self-locking positioning mechanism further includes a linear slide rail, an adjusting slider, and two side limiting slide rails. The linear slide rail is horizontally located on one side of the R-shaped positioning base and is mounted on the top of the positioning base. The two side limiting slide rails are symmetrically arranged on both sides of the top of the linear slide rail. The adjusting slider is located above the linear slide rail and between the two side limiting slide rails. Trapezoidal slide bars are symmetrically arranged on the linear slide rail along its length. The bottom of the adjusting slider is provided with a trapezoidal groove for each trapezoidal slide bar to slide. T-shaped sliders are respectively arranged on both sides of the adjusting slider. Each side slide rail is provided with a T-shaped groove for each T-shaped slider to slide.

[0012] Preferably, the side self-locking positioning mechanism further includes two lifting buffer blocks. Vertical through-holes are respectively opened on both sides of the vertical surface of the adjusting slider. Each lifting buffer block is disposed in each vertical through-hole and can move up and down. Each lifting buffer block is provided with a circular buffer through-hole that passes through both ends. A buffer post is provided in each circular buffer through-hole. One end of each buffer post extends through each circular buffer through-hole toward the R-shaped positioning base. Each positioning ball head is disposed at the extension end of each buffer post near the R-shaped positioning base. The end of each buffer post away from the R-shaped positioning base extends outward through the circular buffer through-hole. The outer ring of the end of each buffer post away from the R-shaped positioning base is provided with a first external thread. The end of each buffer post away from the R-shaped positioning base is also provided with an abutting nut that can abut against the outer wall of each lifting buffer block. A first buffer spring is sleeved on the end of each buffer post near each positioning ball head.

[0013] Preferably, each of the lifting buffer blocks is provided with a vertically arranged screw on its upper part, and the bottom of each screw is rotatably inserted into the top of each lifting buffer block. The upper end of the adjusting slider is provided with a second screw hole for each screw to pass through and be threadedly connected. The upper end of each screw passes through each second screw hole and is set upward. The top extension end of each second screw is provided with a first handle, and the extension end of each screw is provided with a first locking nut that can be threadedly connected to the screw.

[0014] Preferably, each of the lifting sliders is provided with limit slides on both sides, and each vertical through-hole of the adjusting slider is provided with a limit groove for each limit slide to slide.

[0015] Preferably, the side self-locking mechanism further includes a vertical pull rod, a bottom positioning post, a second locking nut, and a second handle. The adjusting slider is provided with a circular through hole penetrating both the upper and lower ends. The circular through hole consists of an upper end and a lower end, with the diameter of the lower end being larger than the diameter of the upper end. The vertical pull rod is vertically and slidably disposed within the circular through hole. The bottom positioning post is located at the lower end of the circular through hole, and the bottom of the vertical pull rod is connected to the top of the bottom positioning post. The diameter of the bottom positioning post is larger than the diameter of the upper end of the circular through hole. A second buffer spring is sleeved on the lower end of the vertical pull rod. The top of the upper end of the vertical pull rod extends upward through the circular through hole. The second locking nut is sleeved on the upper extension end of the vertical pull rod. The outer ring of the upper extension end of the vertical pull rod is provided with a second external thread for threaded connection of the second locking nut. The second handle is disposed at the top of the vertical pull rod.

[0016] Preferably, the bottom end of the bottom positioning post has an arc-shaped surface, and the surface of the linear slide rail has a plurality of insertion holes for the bottom positioning post to be inserted, and all insertion holes are distributed along the length direction of the slide rail.

[0017] The beneficial effects of this invention compared to the prior art are:

[0018] A composite reference stamping tray is provided. Four positioning reference blocks can form a virtual positioning plane, and twelve positioning reference blocks can form three positioning planes. This allows for the placement of dies of different sizes on the virtual positioning plane formed by the positioning reference blocks. In addition, the positioning reference blocks can work together to locally adjust the support position of the die and adjust the pressure on the die, thereby restricting the three degrees of freedom of the die in three directions, including Z-axis movement, rotation around the X-axis, and rotation around the Y-axis. The positioning reference blocks are positioned on the positioning base by bolts and positioning pins engaging with the first screw hole of the positioning base. The positioning pin has sealing rings at the top and bottom to prevent the bolts from falling off and to facilitate disassembly and assembly. The R-type positioning base has an R-shaped groove, and a long guide bar is provided on the back of the die. The long guide bar, when engaged with the R-shaped groove, restricts two degrees of freedom of the die: X-axis movement and rotation around the Z-axis. This leaves only the Y-axis movement unrestricted out of the die's six degrees of freedom. To restrict the last Y-axis movement, manually operate the second handle. Pulling the vertical lever upwards with the second handle moves the adjusting slider to the desired position and stops. Releasing the second handle allows the bottom positioning pin to automatically insert into the linear guide's socket for positioning via the second buffer spring. The bottom of the bottom positioning pin has a stable arc-shaped surface to facilitate connection with the sockets on each linear guide, providing a self-locking function. When the adjusting slider moves towards the die, each first handle can be manually rotated beforehand. Each first handle drives the screw and lifting buffer block to move up and down along the second screw hole. The process continues until the positioning ball head is moved and adjusted to be parallel to the side of the die. Then, the operator manually rotates each first locking nut to lock them. After each positioning ball head aligns with the side of the die, the adjusting block moves each positioning ball head toward the R-shaped positioning base. Each positioning ball head abuts against the side of the die, making the long guide strip and the R-shaped groove fit more tightly, thus guiding the die and effectively avoiding manual adjustments due to incorrect die position. When the adjusting slider moves, the trapezoidal groove on the adjusting slider moves initially along the trapezoidal slide bar on the linear slide rail. Then, each T-shaped slider on the adjusting slider moves again along the T-shaped groove on each side slide rail. This technical solution provides a composite reference stamping tray. This tray uses the 3-2-1 positioning principle to effectively position the die, thereby effectively constraining the die position during production and improving the accuracy of mass production. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ;

[0023] Figure 5 This is a partial top view of the present invention;

[0024] Figure 6 This is a partial three-dimensional structural diagram of the present invention. Figure 2 ;

[0025] Figure 7 This is a partial three-dimensional structural diagram of the side self-locking positioning mechanism of the present invention;

[0026] Figure 8 This is a top view of the side self-locking mechanism of the present invention;

[0027] Figure 9 For the present invention Figure 8 Sectional view at point AA;

[0028] Figure 10 This is a partial top view of the positioning reference block of the present invention;

[0029] Figure 11 For the present invention Figure 10 Sectional view at the middle BB.

[0030] 1-Positioning base; 2-Positioning reference block; 3-Side self-locking positioning mechanism; 4-Die; 5-R-type positioning base; 6-Vertical insert plate; 7-Positioning ball head; 8-Positioning pin; 9-Bolt; 10-Sealing ring; 11-First screw hole; 12-Long guide bar; 13-Linear slide rail; 14-Adjusting slider; 15-Side limiting slide rail; 16-Trapezoidal slide bar; 17-T-type slider; 18-T-type slide groove; 19-Lifting mechanism Buffer block; 20-Vertical through-hole; 21-Buffer post; 22-Abutting nut; 23-First buffer spring; 24-Screw; 25-First handle; 26-First locking nut; 27-Limiting slide; 28-Limiting groove; 29-Vertical pull rod; 30-Bottom positioning post; 31-Second locking nut; 32-Second handle; 33-Circular through-hole; 34-Second buffer spring; 35-Arc-shaped surface; 36-Insertion hole. Detailed Implementation

[0031] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] Reference Figures 1 to 11As shown, a composite reference stamping tray includes a positioning base 1, positioning reference blocks 2, a side self-locking mechanism 3, and a die 4. The positioning reference blocks 2 are matrix-distributed and detachably mounted on the upper surface of the positioning base 1. An R-shaped positioning base 5 is horizontally positioned at the center of the upper surface of the positioning base 1. The side self-locking mechanism 3 is located on one side of the R-shaped positioning base 5. The die 4 is horizontally mounted on all the positioning reference blocks 2. The bottom of the die 4 is provided with a vertical insert plate 6 that can be inserted into the R-shaped positioning base 5. The side self-locking mechanism 3 includes two positioning ball heads 7 that can abut against the side of the die 4 to move the die 4 toward the R-shaped positioning base 5.

[0033] The number of positioning reference blocks 2 is an integer multiple of 4, with every four forming a group of positioning reference blocks 2. The lines connecting the four positioning reference blocks 2 in each group form a square. The positioning reference blocks 2 in all reference block groups are radially mounted on the positioning base 1. The positioning reference blocks 2 in all positioning reference block groups are located on the diagonal line connecting the largest square. Four positioning reference blocks 2 can realize a virtual positioning plane, and twelve positioning reference blocks 2 can realize three positioning planes, thus satisfying the requirement that die dies 4 of different sizes be placed on the virtual positioning plane formed by the positioning reference blocks 2. In addition, the positioning reference blocks 2 can also work together to locally adjust the support position of the die dies 4, adjust the pressure on the die dies 4, and thus restrict the three degrees of freedom of the die dies 4, including Z-axis movement, rotation around the X-axis, and rotation around the Y-axis.

[0034] Each positioning reference block 2 includes a positioning pin 8 and a bolt 9. The positioning pin 8 has a circular through-hole that extends from top to bottom. The bolt 9 is rotatably positioned within the circular through-hole. Sealing rings 10 are provided at the upper and lower ends of the circular through-hole to abut the top of the bolt 9. The positioning base 1 has a first threaded hole 11 for threaded connection of each bolt 9. By engaging the bolt 9 and the positioning pin 8 with the first threaded hole 11 of the positioning base 1, the positioning reference block 2 is positioned on the positioning base 1. The sealing rings 10 at the top and bottom of the positioning pin 8 prevent the bolt 9 from falling off and facilitate disassembly and assembly.

[0035] The vertical insert plate 6 includes a vertically arranged long guide bar 12. The long guide bar 12 can be engaged with the R-shaped groove and restrict the horizontal rotation and XZ axis movement freedom of the die 4. The R-shaped positioning base 5 is designed with an R-shaped groove. The back of the die 4 is provided with the long guide bar 12. After the long guide bar 12 is engaged with the R-shaped groove, it can restrict two degrees of freedom of the die 4, including the X-axis movement and the Z-axis rotation. In this way, only the Y-axis movement of the die 4 is unrestricted out of the six degrees of freedom.

[0036] The side self-locking mechanism 3 also includes a linear slide rail 13, an adjusting slider 14, and two side limiting slide rails 15. The linear slide rail 13 is horizontally located on one side of the R-shaped positioning base 5 and is mounted on the top of the positioning base 1. The two side limiting slide rails 15 are symmetrically arranged on both sides of the top of the linear slide rail 13. The adjusting slider 14 is located above the linear slide rail 13 and between the two side limiting slide rails 15. Trapezoidal slide bars 16 are symmetrically arranged on the linear slide rail 13 along its length. The bottom of the slider 14 is provided with a trapezoidal groove for each trapezoidal slider 16 to slide. T-shaped sliders 17 are provided on both sides of the slider 14. Each side slide rail is provided with a T-shaped groove 18 for each T-shaped slider 17 to slide. When the slider 14 moves, the trapezoidal grooves provided on the slider 14 move initially along the trapezoidal sliders 16 on the linear slide rail 13. Then, each T-shaped slider 17 provided on the slider 14 moves again along the T-shaped groove 18 on each side slide rail.

[0037] The side self-locking mechanism 3 also includes two lifting buffer blocks 19. Vertical through-holes 20 are respectively opened on both sides of the vertical surface of the adjusting slider 14. Each lifting buffer block 19 is movably positioned within each vertical through-hole 20. Each lifting buffer block 19 has a circular buffer through-hole extending through both ends. A buffer post 21 is installed within each circular buffer through-hole. One end of each buffer post 21 extends through each circular buffer through-hole towards the R-shaped positioning base 5. Each positioning ball head 7 is located at the extension end of each buffer post 21 near the R-shaped positioning base 5. The end of each buffer post 21 away from the R-shaped positioning base 5 extends outward through the circular buffer through-hole. Each buffer post 21 has a first external thread on the outer ring of the end away from the R-shaped positioning base 5. Each buffer post 21 also has a contact nut 22 that can abut against the outer wall of each lifting buffer block 19 at the end away from the R-shaped positioning base 5. Each buffer post 21 has a first buffer spring 23 fitted on the end near each positioning ball head 7. When each positioning ball head 7 is connected to the side of the die 4, the adjusting block drives each positioning ball head 7 to move towards the R-shaped positioning base 5. By abutting against the side of the die 4 by each positioning ball head 7, the long guide strip 12 fits more tightly with the R-shaped groove, which plays a certain guiding role for the die 4 and effectively avoids manual adjustment caused by the incorrect position of the die 4.

[0038] Each lifting buffer block 19 is provided with a vertically arranged screw 24 above it. The bottom of each screw 24 is rotatably inserted into the top of each lifting buffer block 19. The upper end of the adjusting slider 14 is provided with a second screw hole for each screw 24 to pass through and be threadedly connected. The upper end of each screw 24 passes through each second screw hole and is set upward. The top extension end of each screw 24 is provided with a first handle 25. The extension end of each screw 24 is provided with a first locking nut 26 that can be threadedly connected to the screw 24.

[0039] Each lifting buffer block 19 is provided with a limit slide bar 27 on both sides. Each vertical through-hole 20 of the adjusting slider 14 is provided with a limit groove 28 for each limit slide bar 27 to slide. When the adjusting slider 14 moves towards the die 4, each first handle 25 can be manually rotated in advance. Each first handle 25 drives the screw 24 and the lifting buffer block 19 to move up and down along the second screw hole until the positioning ball head 7 is moved and adjusted to be parallel to the side of the die 4. Then, the staff manually rotates each first locking nut 26 to lock it.

[0040] The side self-locking mechanism 3 also includes a vertical pull rod 29, a bottom positioning post 30, a second locking nut 31, and a second handle 32. The adjusting slider 14 is provided with a circular through hole 33 that passes through the upper and lower ends. The circular through hole 33 is composed of an upper end and a lower end, with the diameter of the lower end being larger than that of the upper end. The vertical pull rod 29 is vertically and slidably disposed in the circular through hole 33. The bottom positioning post 30 is located at the lower end of the circular through hole 33. The bottom of the vertical pull rod 29 is connected to the top of the bottom positioning post 30. The diameter of the bottom positioning post 30 is larger than the diameter of the upper end of the circular through hole 33. A second buffer spring 34 is sleeved on the lower end of the vertical pull rod 29. The top of the upper end of the vertical pull rod 29 extends upward through the circular through hole 33. The second locking nut 31 is sleeved on the upper extension end of the vertical pull rod 29. The outer ring of the upper extension end of the vertical pull rod 29 is provided with a second external thread for threaded connection of the second locking nut 31. The second handle 32 is disposed at the top of the vertical pull rod 29.

[0041] The bottom of the bottom positioning post 30 is provided with an arc-shaped surface 35. The surface of the linear slide rail 13 is provided with several insertion holes 36 for the bottom positioning post 30 to be inserted. All insertion holes 36 are distributed along the length of the slide rail. In order to restrict the last Y-axis movement freedom of the die 4, the second handle 32 is manually turned. The vertical pull rod 29 is pulled upward by the second handle 32 and the adjusting slider 14 is moved to the required position and then stopped. The second handle 32 is released, and the bottom positioning post 30 is automatically inserted into the insertion hole 36 of the linear slide rail 13 for positioning by the second buffer spring 34. The bottom of the bottom positioning post 30 is provided with a stable arc-shaped surface 35 to facilitate the connection of the insertion holes 36 on each linear slide rail 13, which plays a self-locking role.

[0042] The working principle of this invention is as follows: Four positioning reference blocks 2 can realize a virtual positioning plane, and twelve positioning reference blocks 2 can realize three positioning planes, thereby satisfying the requirement that die dies 4 of different sizes can be placed on the virtual positioning plane formed by the positioning reference blocks 2. In addition, the positioning reference blocks 2 can work together to locally adjust the support position of the die dies 4, adjust the pressure on the die dies 4, and thus restrict the three degrees of freedom of the die dies 4, including Z-axis movement, rotation around the X-axis and rotation around the Y-axis. The positioning reference blocks 2 are positioned on the positioning base 1 by the bolts 9 and positioning pins 8 cooperating with the first screw hole 11 of the positioning base 1. The positioning pin 8 is equipped with sealing rings 10 at the top and bottom to prevent the bolt 9 from falling off and to facilitate disassembly and assembly. The R-shaped positioning base 5 is designed with an R-shaped groove. The back of the die 4 is equipped with a long guide bar 12. After the long guide bar 12 cooperates with the R-shaped groove, it can restrict two degrees of freedom of the die 4, including the X-axis movement and the Z-axis rotation. Thus, only the Y-axis movement of the die 4 is unrestricted. In order to restrict the last Y-axis movement of the die 4, the second handle 32 is manually turned. The vertical pull rod 29 is moved upward by the second handle 32, and the adjusting slider 14 is moved to the desired position and then stopped. The second handle 32 is released, and the bottom positioning post 30 is automatically inserted into the insertion hole 36 of the linear slide rail 13 for positioning by the second buffer spring 34. The bottom of the bottom positioning post 30 is provided with a stable arc surface 35 to facilitate the connection of the insertion hole 36 on each linear slide rail 13, which plays a self-locking role. When the adjusting slider 14 moves towards the die 4, it can be manually rotated beforehand. Each first handle 25 drives the screw 24 and the lifting buffer block 19 to move up and down along the second screw hole until the positioning ball head 7 is adjusted to be parallel to the side of the die 4. Then, the operator manually rotates each first locking nut 26 to lock it. After each positioning ball head 7 is aligned with the side of the die 4, the adjusting block drives each positioning ball head 7 to move towards the R-shaped positioning base 5. The positioning ball head 7 abuts against the side of the die 4, making the long guide bar 12 fit more tightly with the R-shaped groove, which plays a certain guiding role for the die 4 and effectively avoids manual adjustment due to the incorrect position of the die 4. When the adjusting slider 14 moves, the trapezoidal slide groove set on the adjusting slider 14 moves initially along the trapezoidal slide bar 16 on the linear slide rail 13. Then, each T-shaped slider 17 set on the adjusting slider 14 moves again along the T-shaped slide groove 18 on each side slide rail.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A composite datum press tray characterized by, The utility model relates to a kind of positioning base (1), positioning datum block (2), side self-locking positioning mechanism (3) and tooling (4), the positioning datum block (2) matrix distribution and detachably arranged on the upper surface of positioning base (1), the center of the upper surface of positioning base (1) is equipped with the R type positioning base (5) being arranged horizontally, side self-locking positioning mechanism (3) is arranged on the side of R type positioning base (5), tooling (4) is horizontally erected on all positioning datum block (2), the bottom of tooling (4) is equipped with the vertical plug-in plate (6) that can be inserted into R type positioning base (5), side self-locking positioning mechanism (3) includes two positioning ball head (7) that can be in contact with the side of tooling (4) to make tooling (4) move towards R type positioning base (5) direction;R type positioning base (5) is designed with R type slot, the vertical plug-in plate (6) includes the long guide strip (12) being arranged vertically, long guide strip (12) can be inserted with R type slot and limit the horizontal rotation of tooling (4) and the movement degree of freedom in XZ axis direction.

2. A composite datum press tray according to claim 1, wherein, The number of the positioning datum block (2) is an integer multiple of 4, and four of them form a positioning datum block (2) group. The connecting line of the four positioning datum blocks (2) in each positioning datum block (2) group forms a square. The positioning datum blocks (2) in all datum block groups are installed on the positioning base (1) in a radial manner. The positioning datum blocks (2) in all positioning datum block (2) groups are located on the diagonal connecting line of one of the largest squares.

3. A composite datum press tray according to claim 2, wherein, Each of the positioning datum blocks (2) includes a positioning pin (8) and a bolt (9). The positioning pin (8) is provided with a circular through hole passing through the upper and lower surfaces. The bolt (9) is rotatably arranged in the circular through hole. The upper and lower ends of the circular through hole are respectively provided with a sealing ring (10) for resisting the top end of the bolt (9). The positioning base (1) is provided with a first screw hole (11) for threadedly connecting each bolt (9).

4. A composite datum press tray according to claim 3, wherein, The side self-locking positioning mechanism (3) further includes a linear slide rail (13), an adjusting sliding block (14), and two side limiting slide rails (15). The linear slide rail (13) is horizontally arranged on one side of the R type positioning base (5). The linear slide rail (13) is installed on the top of the positioning base (1). The two side limiting slide rails (15) are symmetrically arranged on the top of the linear slide rail (13). The adjusting sliding block (14) is located above the linear slide rail (13) and between the two side limiting slide rails (15). The linear slide rail (13) is symmetrically provided with trapezoidal slide strips (16) along the length direction of the linear slide rail (13). The bottom of the adjusting sliding block (14) is provided with trapezoidal slide grooves for sliding each trapezoidal slide strip (16). The two sides of the adjusting sliding block (14) are respectively provided with T-shaped sliding blocks (17). Each side limiting slide rail is respectively provided with T-shaped slide grooves (18) for sliding each T-shaped sliding block (17).

5. A composite datum press tray according to claim 4, wherein, The side self-locking positioning mechanism (3) further comprises two lifting buffer blocks (19), a vertical through hole (20) is formed on each vertical side of the vertical surface of the adjusting sliding block (14), each lifting buffer block (19) is arranged in each vertical through hole (20) and can move up and down, a circular buffer through hole is formed through both ends of each lifting buffer block (19), a buffer column (21) is arranged in each circular buffer through hole, one end of each buffer column (21) extends towards the R-shaped positioning base (5) through each circular buffer through hole, each positioning ball head (7) is arranged at the extending end of each buffer column (21) close to the R-shaped positioning base (5), and the other end of each buffer column (21) extends outwards through the circular buffer through hole, the outer circle of the other end of each buffer column (21) is provided with a first external thread, and the other end of each buffer column (21) is further provided with a resisting nut (22) capable of resisting the outer wall of each lifting buffer block (19). A first buffer spring (23) is sleeved on the end of each buffer column (21) close to each positioning ball head (7).

6. A composite datum press tray according to claim 5, wherein, A vertical screw rod (24) is arranged above each lifting buffer block (19), the bottom of each screw rod (24) is rotatably inserted into the top of each lifting buffer block (19), the upper end of the adjusting sliding block (14) is provided with a second screw hole for each screw rod (24) to pass through and be screw-connected, the upper end of each screw rod (24) extends upwards through each second screw hole, the top of each screw rod (24) is provided with a first handle (25), and the extending end of each screw rod (24) is provided with a first locking nut (26) capable of being screw-connected with the screw rod (24).

7. A composite datum press tray according to claim 6, wherein, Each lifting buffer block (19) is provided with a limiting sliding strip (27) on each side, and each vertical through hole (20) of the adjusting sliding block (14) is provided with a limiting groove (28) for sliding of each limiting sliding strip (27).

8. A composite datum press tray according to claim 7, wherein, The side self-locking positioning mechanism (3) further comprises a vertical pull rod (29), a bottom positioning column (30), a second locking nut (31) and a second handle (32), a circular through hole (33) is arranged on the adjusting slider (14) and penetrates the upper and lower ends, the circular through hole (33) is composed of an upper end and a lower end, the diameter of the lower end is larger than that of the upper end, the vertical pull rod (29) is vertically and slidably arranged in the circular through hole (33), the bottom positioning column (30) is located at the lower end of the circular through hole (33), the bottom of the vertical pull rod (29) is connected with the top of the bottom positioning column (30), the diameter of the bottom positioning column (30) is larger than that of the upper end of the circular through hole (33), the lower end of the vertical pull rod (29) is sleeved with a second buffer spring (34), the upper end of the vertical pull rod (29) extends upward through the circular through hole (33), the second locking nut (31) is sleeved on the upper end extension end of the vertical pull rod (29), a second external thread for screwing the second locking nut (31) is arranged on the outer circle of the upper end extension end of the vertical pull rod (29), and the second handle (32) is arranged at the top end of the vertical pull rod (29).

9. A composite datum press tray according to claim 8, wherein, The bottom end of the bottom positioning column (30) is provided with an arc surface (35), and the surface of the linear sliding rail (13) is provided with a plurality of insertion holes (36) for inserting the bottom positioning column (30), and all the insertion holes (36) are arranged along the length direction of the sliding rail.

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