Processing technology and tooling fixture of high-precision wallboard

Abstract

The application discloses a processing technology of high-precision wallboards, and the last finishing of left and right wallboards is processed on the same horizontal machining center when workpieces are processed, so that the accuracy is ensured, and semi-finishing- semi-finishing- finishing is adopted to ensure fastening; the positioning surfaces of front and back surfaces of the workpieces are positioning references for each other, so that the accuracy of the positioning surfaces is high, and the accuracy of subsequent hole systems and the accuracy of processing surfaces are ensured.

Description

Technical Field

[0001] This invention relates to the field of wall panel processing technology, specifically to a high-precision wall panel processing technology and tooling fixture. Background Technology

[0002] Currently, wall panels are processed in two stages: left and right. After the left and right wall panels are processed, they are assembled to form a complete wall panel. Due to the high precision requirements of the wall panels, there are 22 sets of holes with a tolerance of ±0.015 and 2 sets with a positional tolerance of ±0.017. Meeting all tolerance requirements at the same time is quite difficult. Previously, a coordinate system was established by connecting Φ180-Φ90, but the customer requires a coordinate system based on connecting Φ180-100, which magnifies the error by 3 times. Moreover, the holes on the reverse side also need to be marked according to this coordinate system. The existing processing technology cannot meet the precision requirements of the wall panels after processing. The aforementioned wall panels are spliced ​​from left to right. The left and right wall panels are processed separately. When splicing them, the tolerance of the workpiece increases due to the difference in precision between the machine tools, which affects the precision of the assembled left and right wall panels. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention proposes a high-precision wall panel processing technology and tooling fixture. During the processing of the workpiece, the final finishing of the left and right wall panels is performed on the same horizontal machining center to ensure accuracy. At the same time, a semi-finishing-semi-finishing-finishing process is used to ensure fastening. Process pin holes and process holes are opened on the workpiece. The center distance from the large central hole to the process holes and process pin holes is greater than 100°, which reduces the rotational error of the workpiece and ensures the accuracy of the holes while meeting all tolerance requirements.

[0004] To achieve the above objectives, the present invention provides a processing technology for high-precision wall panels. Left wall panel construction: Step 1: Using the blank surface on the front of the left wall panel as the reference surface, after clamping, use a vertical milling machine to mill the three positioning surfaces on the back of the left wall panel. Step 2: Flip the left wall panel over. The second tooling fixture uses the three positioning surfaces on the back of the left wall panel as positioning references. The left wall panel is positioned by pressing against the four sides of the second tooling fixture. The positioning of the left wall panel is completed by six-point positioning. The positioning surfaces on the front of the left wall panel are precision milled by a vertical machining center. The other machining surfaces on the left wall panel except for the positioning surfaces are rough milled, as well as the hole system on the front of the left wall panel is rough milled. The screw holes are precision milled, and the center large hole and the machining process pin hole are rough milled. Step 3: Flip the left wall panel over. The third tooling fixture uses the positioning surface on the front of the left wall panel and the positioning reference of the center large hole and process pin hole rough machined in Step 2 on the left wall panel as the positioning reference. Positioning is achieved by one side and two pins. The machining surface on the left wall panel and the hole system on the back side are rough milled by a vertical machining center. Allowance is left for both the machining surface and the hole system. The multiple positioning surfaces on the back side are finish milled, and the screw holes are finish machined to improve the positioning reference. Step 4: The fourth tooling fixture uses the positioning surface, central large hole and process pin hole on the back of the left wall panel as the positioning reference. It is positioned by two pins on one side. The machining contents around the left wall panel are processed by a horizontal machining center. The machining surfaces around the left wall panel are finished. The hole system around the left wall panel is finished. The bottom of the two support feet at the bottom of the left wall panel and the inclined surface on the right edge of the left wall panel are precision milled. The bottom and inclined surface of the above precision milling are used as the positioning reference for the next step. Right wall panel processing technology: Step 1: The first tooling fixture uses the blank surface on the back of the right wall panel as the reference surface. After clamping, the three positioning surfaces on the front of the right wall panel are milled by a vertical milling machine. In the second and fifth steps, the tooling fixture uses the three positioning surfaces on the front of the right wall panel as positioning references. It is positioned by pins against the four sides of the right wall panel. The machining surface on the back of the right wall panel is rough machined by a vertical machining center, leaving a margin. The screw holes are then precision machined. The center hole is bored by a reverse precision boring tool. The process hole on the right wall panel is then machined. The process hole and the center hole on the right wall panel are used as positioning pin holes for the next step. The third and sixth tooling fixtures use the positioning surface, central large hole and process hole of the right wall panel precision machined in the second process as positioning references. Positioning is achieved by one side and two pins. The vertical machining center machines the machining surface on the front of the right wall panel, leaving a margin. The hole system on the front of the right wall panel is rough machined, and the screw holes are precision machined. In process four and seven, the tooling fixture uses the positioning surface and two large holes on the back of the right wall panel as the positioning reference. It is positioned by one side and two pins. The machining contents around the right wall panel are processed by a horizontal machining center. The machining surfaces around the right wall panel are finished, and the hole system around the right wall panel is finished. The two support feet at the bottom of the right wall panel and the inclined surface on the left edge of the right wall panel are precision milled. The above precision milled support feet and inclined surface are used as the positioning reference for the next process. Finishing processes for left and right wall panels: The left and right wall panels are vertically clamped on a double rotary worktable. By rotating the worktable to switch positions, the left and right wall panels are respectively clamped onto the two worktables by the eighth tooling fixture. The left wall panel is positioned at six points using three positioning surfaces on its back, two bottom surfaces around its perimeter, and an inclined surface. The right wall panel is positioned at six points using three positioning surfaces on its front, two bottom surfaces around its perimeter, and an inclined surface. The fixtures clamping the left and right wall panels are cut out, so that both the left and right wall panels can be machined on their front and back sides. At the same time, the same horizontal machining center sequentially performs finishing on the machined surfaces of the left and right wall panels. The high-precision hole system on the left and right wall panels is machined through a semi-finishing-semi-finishing-finishing process to improve the accuracy of the hole system.

[0005] Preferably, the process pin hole is the hole furthest away from the central large hole on the left wall plate, and the process hole is the hole furthest away from the central large hole on the right wall plate, so as to reduce the rotation error of the workpiece and ensure the accuracy of the workpiece.

[0006] Preferably, when the left and right wall panels are positioned using the rough surface, before processing the positioning surface on the back, the four corners of the left and right wall panels are measured using a height gauge. The four corners form diagonals in pairs, and the back of the left and right wall panels are corrected to ensure the accuracy of the positioning surface on the back of the left and right wall panels.

[0007] Preferably, the eighth tooling fixture includes a frame, an eighth positioning table, an eighth positioning point, an eighth pushing assembly, and an eighth clamping assembly. A clamping cavity is formed in the frame, and a left or right wall plate is placed inside the clamping cavity. Multiple cavities are cut out at the bottom of the clamping cavity to allow the cutting head to pass through. Multiple eighth positioning tables are installed at the bottom of the clamping cavity. Two eighth positioning points are installed on the inner wall of the clamping cavity, located directly below the left or right wall plate, and the two eighth positioning points are collinear. Multiple eighth clamping assemblies are installed on the frame. Each eighth clamping assembly is located above the eighth positioning platform. An eighth positioning bolt is installed on the frame to position the inclined surface of the left or right wall panel. An eighth push bolt is installed in the clamping cavity and is positioned opposite to the eighth positioning bolt. An eighth push assembly is set at the top of the frame. The eighth push assembly consists of multiple sets of bolts. L-shaped pressure blocks are set at the two corners of the left or right wall panel at the top. The two pressure blocks are placed on the outer wall of the left or right wall panel, and the pressure blocks are pressed onto the left or right wall panel by the eighth push assembly.

[0008] Preferably, the seventh tooling fixture includes a seventh clamping plate, a seventh positioning table, and a seventh positioning pin. Three or more seventh positioning tables are installed on the seventh clamping plate, and two seventh positioning pins are installed on the seventh positioning plate. The two seventh positioning pins extend into the central large hole and the process hole of the right wall panel, respectively. The process hole is an elongated through hole. Seventh clamping components are installed on the seventh positioning pins extending into the process hole and on the seventh clamping plate. Multiple sets of seventh clamping components are located directly above the seventh positioning table. The fourth tooling fixture includes a fourth clamping plate, a fourth positioning table, and a fourth positioning pin. Three or more fourth positioning tables are installed on the fourth clamping plate, and two fourth positioning pins are installed on the fourth positioning plate. The two fourth positioning pins extend into the central large hole and the process pin hole of the left wall panel, respectively. Multiple sets of fourth clamping components are installed on the fourth clamping plate. Multiple sets of fourth clamping components are located directly above the fourth positioning table.

[0009] Preferably, the fifth tooling fixture includes a fifth clamping plate, a fifth positioning table, and a fifth clamping component. Three or more sets of fifth positioning tables are installed on the fifth clamping plate, and a fifth clamping component is provided above each set of fifth positioning tables. Multiple sets of fifth clamping components are installed on the fifth clamping plate, and these multiple sets of fifth clamping components clamp and position the four sides of the right wall panel. The second tooling fixture includes a second clamping plate, a second positioning table, and a second clamping component. Three or more sets of second positioning tables are installed on the second clamping plate, and a second clamping component is provided above each set of positioning tables. Multiple sets of second clamping components are installed on the second clamping plate, and these multiple sets of second clamping components clamp and position the four sides of the left wall panel.

[0010] Preferably, the first tooling fixture includes a first clamping plate, supporting bosses, and first clamping components. Four supporting bosses are installed on the first clamping plate. The left or right wall panel is placed on the four supporting bosses, and the supporting bosses contact the front of the left wall panel or the back of the right wall panel. The four supporting bosses are directly below the two ends of the diagonal of the left or right wall panel. Multiple sets of first clamping components are arranged around the first clamping plate to clamp and limit the left or right wall panel around the perimeter. Shims and a height gauge are placed on the first clamping plate. The height of the two ends of the diagonal of the left or right wall panel is measured by the height gauge. The shims are placed on the supporting bosses for height correction to ensure that the left or right wall panel is level.

[0011] Compared with the prior art, the advantages of the present invention are as follows: When the workpiece is being processed, the final finishing of the left and right wall panels is performed on the same horizontal machining center to ensure accuracy. At the same time, a semi-finishing-semi-finishing-finishing process is used to ensure fastening. The positioning surfaces on the front and back of the workpiece serve as positioning references for each other. This ensures high precision of the positioning surfaces, guaranteeing the accuracy of subsequent hole systems and machined surfaces. Process pin holes and process holes are opened on the workpiece. The distance from the center of the large central hole to the center of the process holes and process pin holes is greater than 100. This reduces the rotational error of the workpiece while ensuring the accuracy of the holes and meeting all tolerance requirements at the same time. When milling the positioning surface using the blank surface, the height of the workpiece diagonal should be measured with a height gauge when the workpiece is clamped. This can help avoid workpiece tilting and ensure the accuracy of the positioning surface. Attached Figure Description

[0012] Figure 1 This is a double-sided schematic diagram of the left wall panel of the present invention.

[0013] Figure 2 This is a double-sided schematic diagram of the right wall panel of the present invention.

[0014] Figure 3 This is a schematic diagram of the first tooling fixture of the present invention clamping the left wall panel.

[0015] Figure 4 This is a schematic diagram of the first tooling fixture of the present invention clamping the right wall panel.

[0016] Figure 5 This is a schematic diagram of the second tooling fixture of the present invention.

[0017] Figure 6 This is a schematic diagram of the third tooling fixture of the present invention.

[0018] Figure 7 This is a schematic diagram of the fourth tooling fixture of the present invention.

[0019] Figure 8 This is a schematic diagram of the fifth tooling fixture of the present invention.

[0020] Figure 9 This is a schematic diagram of the sixth tooling fixture of the present invention.

[0021] Figure 10 This is a schematic diagram of the seventh tooling fixture of the present invention.

[0022] Figure 11 This is a schematic diagram of the eighth tooling fixture of the present invention.

[0023] Among them, 1. Left wall panel, 2. Right wall panel, 3. Central large hole, 4. Process hole, 5. Process pin hole, 6. First tooling fixture, 7. First clamping plate, 8. Support boss, 9. First clamping assembly, 10. Gasket, 11. Second tooling fixture, 12. Second clamping plate, 13. Second positioning table, 14. Second clamping assembly, 15. Third tooling fixture, 16. Fourth tooling fixture, 17. Fourth clamping plate, 18. Fourth positioning table, 19. Fourth positioning pin, 20. Fifth tooling fixture 21. Fixture, 22. Fifth clamping plate, 23. Fifth positioning table, 24. Fifth clamping assembly, 25. Sixth tooling fixture, 26. Seventh tooling fixture, 27. Seventh clamping plate, 28. Seventh positioning table, 29. Seventh positioning pin, 30. Eighth tooling fixture, 31. Frame, 32. Clamping cavity, 33. Eighth positioning table, 34. Eighth positioning point, 35. Eighth pushing assembly, 36. Pressure block, 37. Eighth clamping assembly, 38. Eighth positioning bolt, 39. Eighth pushing bolt. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1-11As shown, the first tooling fixture 6 includes a first clamping plate 7, supporting bosses 8, and first clamping components 9. Four supporting bosses 8 are installed on the first clamping plate 7. The left wall panel or the right wall panel 2 is placed on the four supporting bosses 8, and the supporting bosses 8 are in contact with the front of the left wall panel or the back of the right wall panel 2. The four supporting bosses 8 are directly below the two ends of the diagonal of the left wall panel or the right wall panel 2. Multiple sets of first clamping components 9 are arranged around the first clamping plate 7 to clamp and limit the left wall panel or the right wall panel 2 around the perimeter. Shims 10 and a height gauge are placed on the first clamping plate 7. The height of the two ends of the diagonal of the left wall panel or the right wall panel 2 is measured by the height gauge. The shims 10 are placed on the supporting bosses 8 for height correction to ensure that the left wall panel or the right wall panel 2 is horizontal. The first tooling fixture 6 is fixed to a vertical milling machine with bolts. A milling cutter mills the back surfaces of the left and right wall panels 2, thus creating positioning surfaces on the front surfaces of the left and right wall panels 2. These positioning surfaces serve as the positioning reference for the next process of the left and right wall panels 2. During clamping, the front surface of the left or right wall panel 2 is facing down, and the four support bosses 8 on the first clamping plate 7 are located directly below the four corners of the left or right wall panel 2. The support bosses 8 thus position the rough surface on the front surface of the left or right wall panel 2. The first clamping assembly 9 includes first clamping plates and first clamping bolts. Multiple first clamping plates are installed on the first clamping plate 7 by bolt fastening, with two of the first clamping plates abutting against the foot plates of the left and right wall panels 2. The first clamping bolt passes through the first mounting seat, and the first clamping bolt is threaded into the first mounting seat. The first mounting seat is mounted on the first clamping plate 7. By rotating the first clamping bolt, it abuts against the top surface of the left or right wall panel 2. A first clamping plate is also mounted on the first clamping plate 7 by bolts. The first clamping plate abuts against the side of the left or right wall panel 2. A first clamping bolt is mounted on the first clamping plate 7 on the other side of the left or right wall panel 2, thus restricting the movement of the left or right wall panel 2. A first clamping assembly is mounted on the first clamping plate 7 by bolts. The first clamping assembly consists of a lead screw, a pressure plate, and a nut. A lead screw is mounted on the first clamping plate 7 by bolts, and a nut is fitted onto the lead screw. A slotted hole is opened in the pressure plate, and the lead screw passes through the slotted hole of the pressure plate. The nut is pressed onto the pressure plate, which in turn presses onto the stepped surface of the outer wall on both sides of the left or right wall panel 2. This achieves the clamping of the first tooling fixture 6 onto the left or right wall panel 2. Due to the large volume of the left wall panel, if the supporting boss 8 has errors or the workpiece tilts due to unevenness of the blank surface, the workpiece needs to be corrected. Otherwise, the positioning surface on the back will tilt, affecting the accuracy of subsequent processing. Therefore, when the first tooling fixture 6 clamps the left or right wall panel 2, before the first clamping assembly clamps the workpiece, the height of the top of the four corners of the workpiece and the height of the two ends of the diagonal are measured using a height gauge. When there is a height difference between the two diagonals of the workpiece, the workpiece is lifted. Taking a height difference of 3mm as an example, 1mm is filled on the supporting boss 8.A 5mm shim 10 is used, and a 1.5mm shim 10 is removed from another supporting boss 8. This raises the higher angle of the workpiece by 1.5mm and lowers the lower angle by 1.5mm, ensuring that the heights of the two diagonal corners of the workpiece are consistent. This guarantees that the height difference of the four corners of the workpiece is within the tolerance range and ensures that the workpiece is level.

[0026] The second tooling fixture 11 includes a second clamping plate 12, a second positioning table 13, and a second clamping assembly 14. Three sets of second positioning tables 13 are fixedly installed on the second clamping plate 12 by bolts. The positioning surface on the back of the left wall panel presses against the second positioning table 13. A second clamping assembly is provided above each set of second positioning tables 13. The second clamping assembly also consists of a lead screw, a pressure plate, and a nut. A lead screw is installed on the first clamping plate 7 by bolts, and a nut is fitted on the lead screw. A waist-shaped hole is opened on the pressure plate, through which the lead screw passes. The nut presses against the pressure plate, and the pressure plate presses against the stepped surface above or around the left wall panel (since the top surface of the left wall panel needs to be milled, the second clamping assembly needs to make way for the vertical machining center, so that the second clamping assembly presses against the stepped surface around the left wall panel). Multiple sets of second clamping components 14 are installed on the second clamping plate 12. The multiple sets of second clamping components 14 clamp and position the four sides of the right wall panel 2. The second clamping components 14 are second fixed limiting rods and second clamping bolts. The second fixed limiting rods are fixed to the second clamping plate by bolts. Multiple second fixed limiting rods abut against the foot plate surface and left end surface of the left wall panel respectively. The second clamping bolt includes a second mounting seat and a second clamping bolt. The second mounting seat is installed on the second clamping plate 12 by bolts. There are multiple second mounting seats. A second clamping bolt passes through each second mounting seat. The second clamping bolt is threaded with the second mounting seat. At the same time, multiple second clamping bolts abut against the top surface and right side surface of the left wall panel. The second clamping plate 12 is placed on a vertical machining center and processed through the front of the left wall panel of the vertical machining center.

[0027] The third tooling fixture 15 includes a third clamping plate, a third positioning platform, and third positioning pins. Three third positioning platforms are mounted on the third clamping plate, and these platforms are positioned to fit against the three positioning surfaces on the front of the left wall panel. Two third positioning pins, which are positioning discs, are bolted to the third clamping plate. These pins extend into the central large hole 3 and the process pin hole 5 of the left wall panel, fitting snugly against the inner walls of these holes. This positioning of the left wall panel using two pins on one side provides positioning. The center distance between the two third positioning pins is greater than 100cm, and the spacing between the pins is greater than the φ180mm spacing used in customer acceptance. The 100 coordinate system ensures that the accuracy of the finished workpiece meets the customer's acceptance requirements. Multiple sets of third clamping components are installed on the third clamping plate by bolts. These components are located directly above the third positioning table. Each third clamping component consists of a lead screw, a pressure plate, and a nut. The lead screw is bolted to the third clamping plate, and a nut is fitted onto the lead screw. A slotted hole is made in the pressure plate, through which the lead screw passes. The nut presses against the pressure plate, which presses against the top surface and the stepped surfaces around the left wall panel. (Because the top surface of the left wall panel needs to be milled, the third clamping components need to make way for the vertical machining center, so that the third clamping components press against the stepped surfaces around the left wall panel.)

[0028] The fourth tooling fixture 16 includes a fourth clamping plate 17, a fourth positioning table 18, and fourth positioning pins 19. Three fourth positioning tables 18 are bolted to the fourth clamping plate 17, and these tables are connected to the left wall plate. Two fourth positioning pins 19 are bolted to the fourth positioning plate, extending into the central large hole 3 and the process pin hole 5 of the left wall plate, respectively, for positioning. Multiple sets of fourth clamping components are mounted on the fourth clamping plate 17, located directly above the fourth positioning table 18. These fourth clamping components also consist of a lead screw, a pressure plate, and a nut. A lead screw is installed via bolts, and a nut is fitted onto the lead screw. A slotted hole is opened on the pressure plate, through which the lead screw passes. The nut presses against the pressure plate, which presses against the top surface and the stepped surfaces around the left wall panel. (Because the top surface of the left wall panel needs to be milled, the fourth clamping assembly needs to make way for the vertical machining center, so that the fourth clamping assembly presses against the stepped surfaces around the left wall panel.) The difference between the fourth tooling fixture 16 and the third tooling fixture 15 is that the position of the third positioning table on the third clamping plate is different from the position of the fourth positioning table 18 on the fourth clamping plate 17. The third positioning table is opposite to the positioning surface on the front of the left wall panel, and the fourth positioning table 18 is opposite to the positioning surface on the back of the left wall panel.

[0029] The fifth tooling fixture 20 includes a fifth clamping plate 21, a fifth positioning table 22, and a fifth clamping assembly 23. Three sets of fifth positioning tables 22 are installed on the fifth clamping plate 21, secured with bolts. The fifth positioning tables 22 are in contact with the positioning surface on the back of the right wall panel 2. A fifth clamping assembly is positioned above each set of fifth positioning tables 22, bolted to the fifth clamping plate 21. The fifth clamping assembly also consists of a lead screw, a pressure plate, and a nut. A lead screw is bolted to the fifth clamping plate 21, and a nut is fitted onto the lead screw. A slotted hole is formed in the pressure plate, through which the lead screw passes. The nut presses against the pressure plate, which presses against the top surface and surrounding steps of the left wall panel. (Because the top surface of the left wall panel needs to be milled, the fifth clamping assembly needs to make way for the vertical machining center, thus...) (The five clamping components are pressed against the stepped surfaces around the left wall panel); multiple sets of fifth clamping components 23 are installed on the fifth clamping plate 21. The multiple sets of fifth clamping components 23 clamp and position the right wall panel 2 around its four sides. The fifth clamping components 23 are fifth fixed limiting rods and fifth clamping bolts. The fifth fixed limiting rods are fixed to the fifth clamping plate by bolts. Multiple fifth fixed limiting rods abut against the foot plate surface and left end surface of the left wall panel respectively. The fifth clamping bolts include fifth mounting seats and fifth clamping bolts. The fifth mounting seats are installed on the fifth clamping plate 21 by bolts. There are multiple fifth mounting seats. A fifth clamping bolt passes through each fifth mounting seat. The fifth clamping bolts are threadedly engaged with the fifth mounting seats. At the same time, multiple fifth clamping bolts abut against the top surface and right side surface of the left wall panel; the fifth clamping plate 21 is placed on a vertical machining center and processed through the front of the right wall panel 2 of the vertical machining center.

[0030] The sixth tooling fixture 24 includes a sixth clamping plate, a sixth positioning platform, and sixth positioning pins. Three sixth positioning platforms are installed on the sixth clamping plate by bolts. Each sixth positioning platform is fitted and positioned against the positioning surface on the front of the right wall panel 2. Two sixth positioning pins are installed on the sixth positioning clamping plate by bolts. These sixth positioning pins are a disc pin and an oblong pin, respectively extending into the central large hole 3 and the process hole 4 of the right wall panel 2 (the disc pin extends into the central large hole 3, and the oblong pin extends into the process hole 4; the outer wall of the sixth positioning pin is fitted against the inner wall of the central large hole 3 and the process hole 4). The process hole 4 is an oblong through hole. The center distance between the two sixth positioning pins is greater than 100cm. The spacing is greater than the φ180-100 coordinate system used by the customer for acceptance, which ensures that the accuracy of the finished workpiece meets the customer's acceptance requirements. The sixth clamping assembly is installed on the sixth locating pin that extends into the process hole 4 and on the sixth clamping plate. Multiple sets of the sixth clamping assembly are located directly above the sixth locating table. The sixth clamping assembly also consists of a lead screw, a pressure plate and a nut. The lead screw is installed on the sixth clamping plate by bolts, and a nut is fitted on the lead screw. The pressure plate has a waist-shaped hole, through which the lead screw passes. The nut presses on the pressure plate, and the pressure plate presses on the top surface and the stepped surfaces around the left wall panel (because the top surface of the left wall panel needs to be milled, the sixth clamping assembly needs to make way for the vertical machining center, so that the sixth clamping assembly presses on the stepped surfaces around the left wall panel).

[0031] The seventh tooling fixture 25 includes a seventh clamping plate, a seventh positioning table, and a seventh positioning pin. Three seventh positioning tables are installed on the seventh clamping plate by means of fastening. Two seventh positioning pins are installed on the seventh positioning clamping plate by means of bolt fastening. The position and structure of the seventh positioning pins are the same as those of the sixth positioning pins. The two seventh positioning pins extend into the central large hole 3 and the process hole 4 of the right wall plate 2, respectively. The process hole 4 is an elongated through hole. Multiple sets of seventh clamping components are located directly above the seventh positioning table. The seventh tooling fixture 25 is the same as the sixth tooling fixture 24.

[0032] The eighth tooling fixture includes a frame 30, an eighth positioning table 32, an eighth positioning point 33, an eighth pushing component 34, and an eighth clamping component 36. The frame 30 has an inwardly recessed clamping cavity 31 formed integrally by casting. Although the outer contours and positioning points of the left and right wall panels 2 are the same, each wall panel 2 uses a separate tooling fixture, meaning there are two sets of the eighth tooling fixtures. The two sets of eighth tooling fixtures clamp the left and right wall panels respectively. The left wall panel uses the positioning surface on the front, the foot plate surface, and the surrounding inclined surfaces as positioning references, while the right wall panel 2 uses the positioning surface on the back, the foot plate surface, and the surrounding inclined surfaces as positioning references. The clamping cavity 31 is used to place either the left or right wall panel 2. The back is hollowed out to form a cavity through which the cutting head can pass. The cutting head of the horizontal machining center can pass through the cavity in the clamping cavity 31 to machine the front and back of the left wall panel or the right wall panel 2. Multiple eighth positioning tables 32 are installed at the bottom of the clamping cavity 31 by bolts. One set of eighth positioning tables 32 is in contact with the positioning surface on the front of the left wall panel, and the other set is in contact with the positioning surface on the back of the right wall panel 2. Two eighth positioning points 33 are installed on the inner wall of the clamping cavity 31 at the bottom by bolts. The eighth positioning points 33 are located directly below the left and right wall panels 2, and the two eighth positioning points 33 are on the same straight line. The foot plate presses against the eighth positioning point 33. Multiple eighth clamping components 36 are installed on the frame 30 via bolts. Each eighth clamping component 36 is located above the eighth positioning table 32. Each eighth clamping component 36 also consists of a lead screw, a pressure plate, and a nut. The lead screw is bolted to the frame 30, and a nut is fitted onto the lead screw. A slotted hole is formed in the pressure plate, through which the lead screw passes. The nut presses against the pressure plate. A frustum-shaped pressure rod is welded to the end of the pressure plate that presses against the workpiece. Because pressing against an unmachined surface would result in poor clamping effect if the clamping area were too large, the frustum-shaped pressure rod reduces the clamping area, ensuring a better clamping effect and preventing further damage to the workpiece. During operation, the shaking affects the accuracy of the workpiece. An eighth positioning bolt 37 is installed on the frame 30 to position the inclined surface of the left wall plate or the right wall plate 2. The eighth positioning bolt 37 passes through the eighth mounting seat, which is fixed to the frame 30 by bolts. The eighth positioning bolt 37 passes through the eighth mounting seat and is threaded with the eighth mounting seat. The eighth positioning bolt 37 abuts against the inclined surface of the left wall plate or the right wall plate 2. A rectangular block is installed on the bottom surface of the clamping cavity 31 by bolts. The rectangular block passes through the eighth push bolt 38, which is positioned opposite to the eighth positioning bolt 37. The eighth positioning bolt 37 pushes the inclined surface of the left wall plate or the right wall plate 2 to fit against the eighth positioning bolt 37, thus completing the positioning.An eighth push assembly 34 is installed on the frame 30. Two sets of eighth push assemblies 34 are located at the upper left and upper right corners of the frame 30. The eighth push assembly 34 consists of multiple bolts, and a fixing block is fixed to the frame 30 by bolt fastening. The eighth push assembly 34 passes through the fixing block and is threadedly engaged with the fixing block. L-shaped pressure blocks 35 are placed at the two top corners of the left or right wall panel 2, and the two pressure blocks 35 are attached to the outer wall of the left or right wall panel 2. The top corner of each pressure block 35 is beveled, and the eighth push assembly 34 abuts against the beveled surface of each pressure block 35. An additional set of eighth push assemblies 34 is added to the top of the pressure block 35 located at the upper left of the right wall panel 2 and the pressure block 35 located at the upper right of the left wall panel 2, pressing the pressure block 35 onto the left and right wall panels 2. For the blank surface, the pressure block 35 needs to be pressed tightly onto the left and right wall plates 2 by the eighth push assembly 34 to increase the friction between the pressure block 35 and the left or right wall plate 2, preventing workpiece vibration during milling and ensuring workpiece accuracy. Simultaneously, the eighth tooling fixture uses a frame 30 to clamp the left and right wall plates 2, ensuring good stability of the workpiece top during machining. This prevents the workpiece from swaying with the fixture due to its height, guaranteeing workpiece stability. The frame 30 fixture also facilitates counterweighting for large and heavy workpieces. With the workpiece and fixture center directly above the turntable center of the horizontal machining center, errors caused by turntable tilt are avoided, ensuring workpiece machining accuracy.

[0033] A high-precision wall panel processing technology; Left wall panel construction: Step 1: Using the blank surface on the front of the left wall panel as the reference surface, the first tooling fixture 6 is used to mill the three positioning surfaces on the back of the left wall panel after clamping. When the left wall panel and the right wall panel 2 are positioned by the blank surface, before machining the positioning surfaces on the back, the four corners of the left wall panel and the right wall panel 2 are measured with a height gauge. The four corners form diagonals in pairs. The back of the left wall panel and the right wall panel 2 are corrected to ensure the accuracy of the positioning surfaces on the back of the left wall panel and the right wall panel 2. Step 2: Flip the left wall panel over. The second tooling fixture 11 uses the three positioning surfaces on the back of the left wall panel as positioning references. The fixture is used to clamp the left wall panel around its perimeter for positioning. This six-point positioning completes the positioning of the left wall panel. The positioning surfaces on the front of the left wall panel are then precision milled using a vertical machining center. Other machining surfaces on the left wall panel, except for the positioning surfaces, are then rough milled. The hole system on the front of the left wall panel is also rough milled. The screw holes are then precision machined. The center large hole 3 and the process pin hole 5 are then rough bored. The process pin hole 5 is the hole on the left wall panel that is furthest away from the center large hole 3. The process pin hole 5 is located near the lower left corner of the left wall panel. Step 3: Flip the left wall panel over. Use the third tooling fixture 15 as the positioning reference for the positioning surface on the front of the left wall panel and the center large hole 3 and process pin hole 5 rough-machined in Step 2 on the left wall panel to ensure the accuracy of the workpiece. Position the workpiece with one side and two pins. Use a vertical machining center to rough-mill the machining surface on the left wall panel and the hole system on the back side. Leave allowance for both the machining surface and the hole system. Finish mill multiple positioning surfaces on the back side and finish machine the screw holes to improve the positioning reference. Step 4: The fourth tooling fixture 16 uses the positioning surface on the back of the left wall panel, the central large hole 3, and the process pin hole 5 as positioning references. It is positioned by one side and two pins. The machining contents around the left wall panel are processed by a horizontal machining center. The machining surfaces around the left wall panel are finished. The hole system around the left wall panel is finished. The bottom of the two support feet at the bottom of the left wall panel and the inclined surface on the right edge of the left wall panel are precision milled. The bottom surface and the inclined surface are used as positioning references for the next step. Right wall panel 2 processing technology: Step 1: The first tooling fixture 6 uses the blank surface on the back of the right wall panel 2 as the reference surface. After the fixture is clamped, the three positioning surfaces on the front and back of the right wall panel 2 are milled by a vertical milling machine. In the second and fifth process, the fixture 20 uses the three positioning surfaces on the front of the right wall panel 2 as positioning references. It is positioned by pins against the four sides of the right wall panel 2. The machining surface on the back of the right wall panel 2 is rough machined by a vertical machining center, leaving a margin. The screw holes are then precision machined. The center hole 3 is bored by a reverse precision boring tool. The process hole 4 on the right wall panel 2 is then machined. The process hole 4 and the center hole on the right wall panel are used as positioning pin holes for the next process. In the third and sixth steps, the tooling fixture 24 uses the positioning surface, the central large hole 3 and the process hole 4 of the right wall panel 2, which are precision machined in the second step, as the positioning reference. It is positioned by two pins on one side. The vertical machining center is used to machine the machining surface on the front side of the right wall panel 2, leaving a margin. The hole system on the back side of the right wall panel 2 is rough machined, and the screw holes are precision machined. Process 4, the seventh tooling fixture 25 uses the positioning surface and two large holes on the front of the right wall panel 2 as the positioning reference. It is positioned by one side and two pins. The machining contents around the right wall panel 2 are processed by a horizontal machining center. The machining surfaces around the right wall panel 2 are finished, the hole system around the right wall panel 2 is finished, and the two support feet at the bottom of the right wall panel 2 and the inclined surface on the left edge of the right wall panel 2 are precision milled. The bottom surface and the inclined surface are used as the positioning reference for the next process. Finishing process of left wall panel and right box: The left and right wall panels 2 are vertically clamped on a double rotary worktable. Two sets of eighth tooling fixtures are bolted to the double rotary worktable. By rotating the worktable to switch positions, the left and right wall panels 2 are clamped and positioned by the two sets of eighth tooling fixtures on the double rotary worktable. The left wall panel is positioned at six points using multiple positioning surfaces on its back, two bottom surfaces around its perimeter, and an inclined surface. The right wall panel 2 is positioned at six points using its front positioning surface, two bottom surfaces around its perimeter, and an inclined surface. The clamping fixtures for the left and right wall panels 2 are also hollowed out, so that the front and back of both the left and right wall panels 2 can be machined. At the same time, the horizontal machining center sequentially performs finishing on the machining surfaces of the left and right wall panels 2. The high-precision hole system on the left and right wall panels 2 is machined through a semi-finishing-semi-finishing-finishing process to improve the accuracy of the hole system.

Claims

1. A processing technology for high-precision wall panels, characterized in that... ； Left wall panel construction: Step 1: Using the blank surface on the front of the left wall panel as the reference surface, after clamping, use a vertical milling machine to mill the three positioning surfaces on the back of the left wall panel. Step 2: Flip the left wall panel over. The second tooling fixture uses the three positioning surfaces on the back of the left wall panel as positioning references. The left wall panel is positioned by pressing against the four sides of the second tooling fixture. The positioning of the left wall panel is completed by six-point positioning. The positioning surfaces on the front of the left wall panel are precision milled by a vertical machining center. The other machining surfaces on the left wall panel except for the positioning surfaces are rough milled, as well as the hole system on the front of the left wall panel is rough milled. The screw holes are precision milled, and the center large hole and the machining process pin hole are rough milled. Step 3: Flip the left wall panel over. The third tooling fixture uses the positioning surface on the front of the left wall panel and the positioning reference of the center large hole and process pin hole rough machined in Step 2 on the left wall panel as the positioning reference. Positioning is achieved by one side and two pins. The machining surface on the left wall panel and the hole system on the back side are rough milled by a vertical machining center. Allowance is left for both the machining surface and the hole system. The multiple positioning surfaces on the back side are finish milled, and the screw holes are finish machined to improve the positioning reference. Step 4: The fourth tooling fixture uses the positioning surface, central large hole and process pin hole on the back of the left wall panel as the positioning reference. It is positioned by two pins on one side. The machining contents around the left wall panel are processed by a horizontal machining center. The machining surfaces around the left wall panel are finished. The hole system around the left wall panel is finished. The bottom of the two support feet at the bottom of the left wall panel and the inclined surface on the right edge of the left wall panel are precision milled. The bottom and inclined surface of the above precision milling are used as the positioning reference for the next step. Right wall panel processing technology: Step 1: The first tooling fixture uses the blank surface on the back of the right wall panel as the reference surface. After clamping, the three positioning surfaces on the front of the right wall panel are milled by a vertical milling machine. In the second and fifth steps, the tooling fixture uses the three positioning surfaces on the front of the right wall panel as positioning references. It is positioned by pins against the four sides of the right wall panel. The machining surface on the back of the right wall panel is rough machined by a vertical machining center, leaving a margin. The screw holes are then precision machined. The center hole is bored by a reverse precision boring tool. The process hole on the right wall panel is then machined. The process hole and the center hole on the right wall panel are used as positioning pin holes for the next step. The third and sixth tooling fixtures use the positioning surface, central large hole and process hole of the right wall panel precision machined in the second process as positioning references. Positioning is achieved by one side and two pins. The vertical machining center machines the machining surface on the front of the right wall panel, leaving a margin. The hole system on the front of the right wall panel is rough machined, and the screw holes are precision machined. In process four and seven, the tooling fixture uses the positioning surface and two large holes on the back of the right wall panel as the positioning reference. It is positioned by one side and two pins. The machining contents around the right wall panel are processed by a horizontal machining center. The machining surfaces around the right wall panel are finished, and the hole system around the right wall panel is finished. The two support feet at the bottom of the right wall panel and the inclined surface on the left edge of the right wall panel are precision milled. The above precision milled support feet and inclined surface are used as the positioning reference for the next process. Finishing processes for left and right wall panels: The left and right wall panels are vertically clamped on a double rotary worktable. By rotating the worktable to switch positions, the left and right wall panels are respectively clamped onto the two worktables by the eighth tooling fixture. The left wall panel is positioned at six points using three positioning surfaces on its back, two bottom surfaces around its perimeter, and an inclined surface. The right wall panel is positioned at six points using three positioning surfaces on its front, two bottom surfaces around its perimeter, and an inclined surface. The fixtures clamping the left and right wall panels are cut out, so that both the left and right wall panels can be machined on their front and back sides. At the same time, the same horizontal machining center sequentially performs finishing on the machined surfaces of the left and right wall panels. The high-precision hole system on the left and right wall panels is machined through a semi-finishing-semi-finishing-finishing process to improve the accuracy of the hole system.

2. The processing technology for a high-precision wall panel according to claim 1, characterized in that: The process pin hole is the hole furthest away from the central large hole on the left wall plate, and the process hole is the hole furthest away from the central large hole on the right wall plate. This reduces the rotation error of the workpiece and ensures the accuracy of the workpiece.

3. The processing technology for a high-precision wall panel according to claim 1, characterized in that: When positioning the left and right wall panels using the rough surfaces, before machining the positioning surfaces on the back, measure the positions of the four corners of the left and right wall panels using a height gauge. The four corners form diagonals in pairs, and the back surfaces of the left and right wall panels are corrected to ensure the accuracy of the positioning surfaces on the back surfaces of the left and right wall panels.

4. The processing technology for a high-precision wall panel according to claim 1, characterized in that; The eighth tooling fixture includes a frame, an eighth positioning table, eighth positioning points, an eighth pushing assembly, and an eighth clamping assembly. A clamping cavity is formed in the frame, and a left or right wall plate is placed inside the cavity. Multiple cavities are cut out in the bottom of the clamping cavity to allow the cutting head to pass through. Multiple eighth positioning tables are installed in the bottom of the clamping cavity. Two eighth positioning points are installed on the inner wall of the clamping cavity, located directly below the left or right wall plate, and the two eighth positioning points are collinear. Multiple eighth clamping assemblies are installed on the frame. Through each... The eighth clamping assembly is located above the eighth positioning platform. An eighth positioning bolt for positioning the inclined surface of the left or right wall panel is installed on the frame. An eighth push bolt is installed in the clamping cavity and is positioned opposite to the eighth positioning bolt. An eighth push assembly is set at the top of the frame. The eighth push assembly consists of multiple sets of bolts. L-shaped pressure blocks are set at the two corners of the left or right wall panel at the top. The two pressure blocks are placed on the outer wall of the left or right wall panel, and the pressure blocks are pressed onto the left or right wall panel by the eighth push assembly.

5. The processing technology for a high-precision wall panel according to claim 1, characterized in that; The seventh tooling fixture includes a seventh clamping plate, a seventh positioning table, and a seventh positioning pin. Three or more seventh positioning tables are installed on the seventh clamping plate, and two seventh positioning pins are installed on the seventh positioning plate. The two seventh positioning pins extend into the central large hole and the process hole of the right wall panel, respectively. The process hole is an elongated through hole. Seventh clamping components are installed on the seventh positioning pins extending into the process hole and on the seventh clamping plate. Multiple sets of seventh clamping components are located directly above the seventh positioning table. The fourth tooling fixture includes a fourth clamping plate, a fourth positioning table, and a fourth positioning pin. Three or more fourth positioning tables are installed on the fourth clamping plate, and two fourth positioning pins are installed on the fourth positioning plate. The two fourth positioning pins extend into the central large hole and the process pin hole of the left wall panel, respectively. Multiple sets of fourth clamping components are installed on the fourth clamping plate. Multiple sets of fourth clamping components are located directly above the fourth positioning table.

6. The processing technology for a high-precision wall panel according to claim 1, characterized in that; The fifth tooling fixture includes a fifth clamping plate, a fifth positioning table, and a fifth clamping component. Three or more sets of fifth positioning tables are installed on the fifth clamping plate. A fifth clamping component is positioned above each set of fifth positioning tables. Multiple sets of fifth clamping components are installed on the fifth clamping plate, and these multiple sets of fifth clamping components clamp and position the four sides of the right wall panel. The second tooling fixture includes a second clamping plate, a second positioning table, and a second clamping component. Three or more sets of second positioning tables are installed on the second clamping plate. A second clamping component is positioned above each set of positioning tables. Multiple sets of second clamping components are installed on the second clamping plate, and these multiple sets of second clamping components clamp and position the four sides of the left wall panel.

7. The processing technology for a high-precision wall panel according to claim 1, characterized in that; The first tooling fixture includes a first clamping plate, supporting bosses, and first clamping components. Four supporting bosses are installed on the first clamping plate. The left or right wall panel is placed on the four supporting bosses, and the supporting bosses contact the front of the left wall panel or the back of the right wall panel. The four supporting bosses are directly below the two ends of the diagonal of the left or right wall panel. Multiple sets of first clamping components are arranged around the first clamping plate to clamp and limit the left or right wall panel around the perimeter. Shims and a height gauge are placed on the first clamping plate. The height of the two ends of the diagonal of the left or right wall panel is measured by the height gauge. The shims are placed on the supporting bosses for height correction to ensure that the left or right wall panel is level.

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