Rapid processing technology of high-speed bag sewing machine shell

Abstract

The invention discloses a rapid machining process of a high-speed bag sewing machine shell. The rapid machining process sequentially comprises the steps of machining a datum plane, roughly milling a rotary table, machining a four-axis face A, a four-axis face B and a four-axis face C, roughly machining the rotary table and finely machining the rotary table. A plurality of machining procedures on the same face are integrated into one procedure, meanwhile, a plurality of machining procedures on the same face are machined through the same machining device, errors caused by multiple times of clamping and machining of a plurality of machine tools are avoided, the precision of finished products is improved, and meanwhile the labor intensity of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the field of high-speed sewing technology shell processing, and specifically to A sort of Rapid processing technology for high-speed bag sewing machine housing. Background Art

[0002] The bag sewing machine is a device for sewing plastic woven fabrics, mainly completing the splicing and sealing of woven fabrics. The key point of the process is strong sewing, and it is favored by the market due to its high efficiency. Since the six faces of the blank of the bag sewing machine shell need to be processed by milling and hole system processing, and there are inclined holes and straight holes with inconsistent apertures on each face, the previous bag sewing machine shell processing process has more than 30 processes, and more than 30 machine tools are required to form a production line. In this way, the high-speed bag sewing machine shell needs to be clamped multiple times during processing, and the holes on the same face are processed on different machine tools. In this way, the accuracy between the hole systems is reduced, resulting in the workpiece being unable to guarantee high accuracy during the processing process, affecting the product yield; at the same time, when processing different faces, different positioning references need to be used, which makes it impossible to control the accuracy of product processing. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned prior art, the present invention proposes a rapid processing technology for the shell of a high-speed bag sewing machine, which integrates multiple processing steps on the same surface into one process, and processes multiple steps on the same surface with the same processing equipment at the same time, avoiding the errors caused by multiple clamping and processing on multiple machine tools. This improves the accuracy of the finished product and reduces the labor intensity of the staff.

[0004] To achieve the above object, the solution of the present invention is a rapid processing technology for a high-speed bag sewing machine housing, characterized in that: 1. Machining reference surface: The rough surface of the shell is positioned and clamped by the first fixture. The first fixture is positioned at three points on the bottom surface of the shell, one point on the side surface and two points on the back surface. The vertical machining center is used to fine-mill the mounting surface processing size of the shell, and the processing size of all holes on the mounting surface including the two positioning pin holes is fine-machined. The mounting surface and the positioning pin holes are used as the common reference surface and positioning holes for subsequent multiple processing procedures; 2. Rough milling turntable process: The shell is clamped by the second fixture, which is installed on the turntable of the horizontal machining center. The mounting surface processed in the first process is used as the reference surface, and the positioning pin hole on the mounting surface is used as the positioning hole. The two pins on one side are used for positioning, and then the top surface of the shell is pressed to achieve clamping. The horizontal machining center can rough mill the processing dimensions on the A surface, B surface, E surface, and F surface of the shell in sequence through the rotation of the turntable. The C surface is a pressing surface and cannot be processed; 3. Processing the A, B and C surfaces of the four-axis process: The shell is clamped by the third fixture, which is installed on the four-axis turntable of the vertical machining center. The third fixture uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. It is positioned by two pins on one side. The third fixture passes through the E and F surfaces of the shell and extends into the shell for compaction. The vertical machining center can finely process the straight hole system of the A, B and C surfaces of the shell and the inclined hole on the inclined surface of the A surface through the surrounding turntable; 4. Processing of the C, E and F surfaces of the four-axis process: The shell is clamped by the fourth fixture, which is installed on the four-axis turntable of the vertical machining center. The fourth fixture uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. It is positioned by two pins on one side. The fourth fixture presses the outward protrusions on the A and B surfaces, and the vertical machining center uses the four-axis turntable to perform fine milling on the C, E, F and inclined surfaces of the shell, and processes the hole system of the C, E and F surfaces at the same time; 5. Rough and fine machining process of the turntable: the turntable is divided into two sections by a partition. The fifth fixture is divided into two groups and the two groups of fixtures are respectively installed in the two sections of the turntable. A 90° angle iron is installed between one of the fifth fixtures and the turntable. The shell is clamped by the fifth fixture, so that vertical clamping and horizontal clamping of the shell are realized. The fifth fixture is installed on the four-axis turntable of the vertical machining center. The fifth fixture uses the mounting surface processed by the first process as the reference surface, and the pin holes on the mounting surface as the positioning holes. It is positioned by two pins on one side and the top of the shell is pressed. The vertically clamped shell is processed by the horizontal machining center to have the spindle holes on the E and F surfaces, the axial holes on the A and B surfaces, and the three-bend needle holes, and then the E and F surfaces are fine-milled. The horizontally clamped shell is processed by the horizontal machining center to have the needle bar holes.

[0005] Preferably, the shell is clamped upside down on the first fixture, which includes a first clamping plate, a bottom support block, a side limit block, a clamping push block and a first clamping assembly. A bottom support block is installed on the first clamping plate, and the tops of multiple bottom support blocks are in contact with the C surface of the shell. Side limit blocks in contact with the B surface and the F surface of the shell are installed on the first clamping plate, and a clamping push block in contact with the A surface of the shell is installed on the first clamping plate. The blank shell of the shell is positioned by six-point positioning. A first clamping assembly is also installed on the first clamping plate, and the first clamping assembly clamps the needle and thread plate of the shell. During processing, the mounting surface of the shell is first rough milled, and then the positioning pin holes and other mounting holes on the mounting surface are finely machined, and finally the mounting surface is finely milled.

[0006] Preferably, the second fixture includes a second clamp, a second positioning plane, a second positioning pin and a second clamping assembly. Multiple second positioning planes are installed on the second fixture. The mounting surface of the shell is placed on the second positioning plane as a reference plane. Multiple second positioning planes are distributed under the four corners of the mounting plate. Two second positioning pins are installed on the second clamp. The second positioning pins extend into the positioning pin holes of the mounting surface for positioning. A second clamping assembly is installed on the second clamp, which passes through the shell and extends to the top of the shell. The C surface of the shell is clamped by the second clamping assembly.

[0007] Preferably, the third tooling fixture includes a third clamping plate, a third positioning plane, a third positioning pin and a third clamping assembly. Multiple third positioning planes are installed on the third tooling fixture. The mounting surface of the shell is placed on the third positioning plane as a reference plane. The multiple third positioning planes are distributed under the four corners of the mounting plate. Two third positioning pins are installed on the third clamping plate. The third positioning pins extend into the positioning pin holes on the mounting surface for positioning. Two groups of third clamping assemblies are installed on the third clamping plate. The two groups of third clamping assemblies are respectively located on the third clamping plates on the left and right sides of the E and F surfaces of the shell. One group of third clamping assemblies presses the needle plate table of the shell, and the other group of third clamping assemblies extends from the spindle hole on the F surface into the shell for pressing.

[0008] Preferably, after the shell is clamped, it is rotated counterclockwise 90°, and the B surface is rough-milled and the hole system of the B surface of the shell is finely machined by the vertical machining center. Then the shell is rotated clockwise 90°, and the C surface is rough-milled and the hole system of the C surface of the shell is finely machined by the vertical machining center. The shell is rotated counterclockwise to the level of one of the head bevels, and the head bevel is rough-milled and the needle rod hole diameter is rough-machined by the vertical machining center. The shell is rotated clockwise to the level of the other head bevel, and the head bevel is rough-milled and the front side bevel hole diameter is rough-machined by the vertical machining center. After processing, the shell is rotated counterclockwise until the C surface is facing up, and then the shell is rotated clockwise 90°, and the A surface is rough-milled and all the hole systems on the A surface are fine-machined.

[0009] Preferably, the fourth fixture includes a fourth clamp, a fourth positioning plane, a fourth positioning pin and a fourth clamping assembly. Multiple fourth positioning planes are installed on the fourth fixture. The mounting surface of the shell is placed on the fourth positioning plane as a reference plane. Multiple fourth positioning planes are distributed below the four corners of the mounting plate. Two fourth positioning pins are installed on the fourth clamp. The fourth positioning pins extend into the positioning pin holes of the mounting surface for positioning. Two groups of fourth clamping assemblies are installed on the fourth clamp. The fourth clamping assembly is located on the outside of the A surface and the B surface of the shell, and the protrusions on the A surface and the B surface are clamped by the fourth clamping assembly. After the shell is clamped, the C surface and the hole system of the C surface are fine-milled first, and then the shell is rotated 90° counterclockwise, and the vertical machining center rough-mills the E surface and the face cover surface of the shell head, and the hole system on the E surface and the face cover surface is rough-machined. The shell is rotated 180° clockwise again, and the vertical machining center rough-mills the F surface of the shell and the hole system on the F surface.

[0010] Preferably, two turntables are installed on the rotating worktable, and a fifth tooling fixture is installed on each turntable. The fifth tooling fixture includes a fifth clamp, a fifth positioning plane, a fifth positioning pin and a fifth clamping assembly, wherein one fifth clamp is installed on the turntable, and multiple fifth positioning planes are installed on the fifth tooling fixture. The mounting surface of the shell is placed on the fifth positioning plane as a reference plane, and multiple fifth positioning planes are distributed under the four corners of the mounting plate. Two fifth positioning pins are installed on the fifth clamp, and the fifth positioning pins extend into the positioning pin holes of the mounting surface for positioning. A fifth clamping assembly is installed on the fifth clamp, and the fifth clamping assembly clamps the top of the shell, and the spindle hole and the axial hole of the E surface and the fine milling of the E surface are performed by the horizontal machining center, and the surface cover and the hole system on the fine-machined surface cover are simultaneously fine-milled. The shell is rotated 180°, and the horizontal machining center fine-mills the F surface and the spindle hole and other axial holes on the fine-machined F surface.

[0011] Preferably, a 90° angle iron is installed on one of the turntables, and the fifth clamping plate is installed on the angle iron, so that the shell can be clamped vertically. The fifth clamping assembly is also pressed on the C surface of the shell. In this way, the orientation of the shell is adjusted by the turntable, and the front side hole and the needle bar hole on the inclined surface of the machine head are fine-machined by the horizontal machining center.

[0012] Compared with the prior art, the advantages of the present invention are that multiple processing steps on the same surface are integrated into one process, and multiple processes on the same surface are processed by the same processing equipment at the same time, avoiding the errors caused by multiple clamping and processing on multiple machine tools, thereby improving the accuracy of the finished product and reducing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 These are the A, C, and E views of the product to be processed of the present invention.

[0014] Figure 2 These are the B, D, and F views of the product to be processed of the present invention.

[0015] Figure 3 It is a schematic diagram of the machine head and E surface of the product to be processed of the present invention.

[0016] Figure 4 It is a schematic diagram of the first fixture of the present invention.

[0017] Figure 5 It is a schematic diagram of the second fixture of the present invention.

[0018] Figure 6 It is a schematic diagram of the third fixture of the present invention.

[0019] Figure 7 It is a schematic diagram of the fourth fixture of the present invention.

[0020] Figure 8 It is a schematic diagram of the horizontal clamping of the fifth fixture of the present invention.

[0021] Fig. 9 It is a schematic diagram of the vertical clamping of the fifth fixture of the present invention.

[0022] Among them, 1, A surface, 2, B surface, 3, C surface, 4, D surface, 5, E surface, 6, F surface, 7, first fixture, 8, first clamp, 9, bottom support block, 10, side limit block, 11, clamping push block, 12, first clamping assembly, 13, second fixture, 14, second clamp, 15, second positioning plane, 16, second positioning pin, 17, second clamping assembly, 18, third fixture, 19, third Clamp, 20. Third positioning plane, 21. Third positioning pin, 22. Third clamping assembly, 23. Fourth fixture, 24. Fourth clamp, 25. Fourth positioning plane, 26. Fourth positioning pin, 27. Fourth clamping assembly, 28. Rotating worktable, 29. Partition, 30. Fifth fixture, 31. Fifth clamp, 32. Fifth positioning plane, 33. Fifth positioning pin, 34. Fifth clamping assembly, 35. Angle iron. DETAILED DESCRIPTION

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] like Figure 1-6 As shown, a rapid processing technology for a high-speed bag sewing machine housing is characterized by: 1. Machining reference surface: The rough surface of the shell is positioned and clamped by the first fixture 7, which is installed on the machine table of the vertical machining center by bolts. The first fixture 7 is positioned by three points on the bottom surface of the shell (the three points on the bottom surface of the shell are the D surface of the shell, which is also the mounting surface of the shell), one point on the side (the side of the shell is the F surface of the shell) and two points on the back (the back is the B surface of the shell). In this way, the shell is roughly positioned by six-point positioning, and the mounting surface of the shell is finely milled by the vertical machining center to obtain the machining dimensions, and all the hole system machining dimensions on the mounting surface including the two locating pin holes are finely machined. The mounting surface and the locating pin holes are used as the common reference surface and locating holes for subsequent multiple machining processes, which unifies the machining datum and ensures the machining accuracy of the workpiece; 2. Rough milling turntable process: The shell is clamped by the second fixture 13, and the second fixture 13 is installed on the turntable of the horizontal machining center by bolt fastening, so that the second fixture can rotate 360° around the Z axis, and the installation surface processed in the first process is used as the positioning reference surface, and the positioning pin hole on the installation surface is used as the positioning hole. Positioning is performed by two pins on one side, and then the top surface of the shell is pressed to achieve clamping. Through the rotation of the turntable, the horizontal machining center can sequentially rough mill the processing dimensions of the A surface, B surface, E surface, and F surface of the shell. The C surface is a pressing surface and cannot be processed; 3. Processing the A, B and C surfaces of the four-axis process: The shell is clamped by the third fixture 18, and the shell is clamped horizontally. The third fixture 18 is bolted on the four-axis turntable of the vertical machining center. The third fixture 18 rotates 360° around the X axis. The third fixture 18 uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. The third fixture 18 is positioned by two pins on one side. The third fixture 18 passes through the E and F surfaces of the shell and extends into the shell for pressing. The vertical machining center can finely process the straight hole system of the A, B and C surfaces of the shell and the inclined hole on the inclined surface of the A surface through the four-sided turntable. 4. Processing of the C, E and F surfaces in the four-axis process: The shell is clamped by the fourth fixture 23, and the shell is clamped longitudinally. The fourth fixture 23 is installed on the four-axis turntable of the vertical machining center. The fourth fixture 23 rotates 360° around the X axis. The fourth fixture 23 uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. The fourth fixture 23 is positioned by two pins on one side. The fourth fixture 23 presses the outward protrusions on the A and B surfaces, and the vertical machining center is used to perform rough milling of the C, E, F and the inclined surface of the machine head through the four-axis turntable, and the hole system of the C, E and F surfaces is processed at the same time; 5. Rough and fine machining process of the turntable: the rotary table 28 is divided into two sections by the partition 29. The fifth fixture 30 is divided into two groups and the two groups of fixtures are respectively installed in the two sections of the rotary table 28. A 90° angle iron 35 is installed between one of the fifth fixtures 30 and the rotary table 28. The shell is clamped by the fifth fixture 30, so that vertical clamping and horizontal clamping of the shell are realized. The fifth fixture 30 is installed on the four-axis turntable of the vertical machining center. The fifth fixture 30 uses the mounting surface processed by the first process as the reference surface, and uses the pin holes on the mounting surface as the positioning holes. It is positioned by two pins on one side to press the top of the shell. The vertically clamped shell is processed by the horizontal machining center to have the spindle holes on the E and F surfaces, the axial holes on the A and B surfaces, and the three-bend needle holes, and then the E and F surfaces are fine-milled. The horizontally clamped shell is processed by the horizontal machining center to have the needle bar holes.

[0025] The shell is clamped upside down on the first fixture 7. The first fixture 7 includes a first clamping plate 8, a bottom support block 9, a side limit block 10, a clamping push block 11 and a first clamping assembly 12. A plurality of bottom support blocks 9 are installed on the first clamping plate 8. Each bottom support plate is a ball head support nail. The tops of the plurality of bottom support blocks 9 are in contact with the C surface of the shell. Since the C surface of the shell is an uneven rough surface, the rough surface is positioned by self-adjusting the ball head support nail. A side limit block 10 is installed on the first clamping plate 8, which is in contact with the B surface and the F surface of the shell respectively. The side limit block 10 is located on the right side of the shell ( The side limit leaning block 10 includes a leaning plate and a positioning pin, the leaning plate is fixed on the first clamping plate 8 by welding, and a positioning pin is installed on the side of the leaning plate facing the shell by bolting, and the positioning pin is against the outer wall of the shell, and a clamping push block 11 in contact with the A surface and the E surface of the shell is installed on the first clamping plate 8, and the clamping push block 11 includes a clamping plate and a clamping rod, wherein the clamping plate is installed on the first clamping plate 8 on the front (A surface) and the left side (E surface) of the shell by bolting, and a threaded hole is opened in the clamping plate, and the clamping rod is a threaded rod. The clamping rod passes through the threaded hole on the clamping plate. One end of the clamping rod is against the front (A side) and the left side (E side) of the shell. The clamping is achieved by tightening the clamping rod. The blank shell of the shell is positioned by six-point positioning. The first clamping assembly 12 is also installed on the first clamping plate 8 by bolt fastening. The first clamping assembly 12 is divided into two groups, wherein the first clamping assembly 12 clamps the needle and thread plate of the shell, and the other group of first clamping assemblies 12 extends through the hole on the F side and extends into the shell for pressing. The first clamping assembly 12 includes a pressure block, a column and a threaded rod, wherein the bottom of the column is installed on the first clamp by bolts. On the plate 8, a threaded rod is fixed to the first clamping plate 8 between the column and the shell by welding, a nut is sleeved on the top of the threaded rod, a pressure plate is hinged on the column, a waist-shaped hole is opened on the pressure plate, the threaded rod passes through the waist-shaped hole and is pressed on the shell, the nut is located on the top of the pressure plate, and the nut is pressed on the pressure plate, which will clamp the shell; when processing, the mounting surface of the shell is first rough milled by the vertical machining center, and then the locating pin hole and other mounting holes on the mounting surface are finely machined, and finally the mounting surface is finely milled, so that the mounting surface and the locating pin hole can be used as a common reference for subsequent processing.

[0026] The second fixture 13 includes a second clamping plate 14, a second positioning plane 15, a second positioning pin 16 and a second clamping assembly 17. A plurality of second positioning planes 15 are installed on the second fixture 13 by bolt fastening. There are four second positioning planes 15 and each second positioning plane 15 is a boss. The second positioning plane 15 is against the bottom surface of the four corners of the mounting surface. The two positioning pin holes are located between the two second positioning planes 15. The second positioning pin 16 and the top pin hole of the shell are arranged opposite to each other up and down. A cylinder is fixed to the bottom of the second positioning pin 16 by welding. The top of the cylinder supports the mounting surface. The cylinder is installed on the second clamping plate 14 by bolt fastening. The mounting surface of the shell is placed on the second positioning plane 15 as a reference plane. A plurality of second positioning planes 15 are distributed below the four corners of the mounting plate. Two second positioning pins 16 are installed on the second clamping plate 14. The second positioning pins 16 extend into the positioning pin holes of the mounting surface for positioning. The second clamping assembly 17 passes through the shell and extends to the top of the shell. The second clamping assembly 17 includes a threaded rod, a pressure block and a nut. The bottom of the threaded rod is fixed to the second clamping plate 14 by welding. A nut is sleeved on the top of the threaded rod. A through hole for the threaded rod to pass through is opened on the pressure block. The nut is pressed on the top of the pressure block, and the pressure block is pressed on the top surface (C surface) of the shell. The C surface of the shell is clamped by the second clamping assembly 17. During processing, since the second clamping plate 14 is installed by bolts, On the turntable of the horizontal machining center, the turntable is used to realize 360° machining of the shell around the Z axis. When working, the A surface of the shell is rough milled first, the turntable rotates 90 degrees clockwise, and the horizontal machining center rough mills the F surface of the shell. After the rough milling of the F surface is completed, the turntable rotates 90 degrees clockwise, and the horizontal machining center rough mills the B surface of the shell. After the rough milling of the B surface is completed, the turntable rotates 90 degrees clockwise, and the horizontal machining center rough mills the E surface of the shell, thus realizing the rough milling of the A, B, E, and F surfaces of the shell.

[0027] The third fixture 18 includes a third clamping plate 19, a third positioning plane 20, a third positioning pin 21 and a third clamping assembly 22. A plurality of third positioning planes 20 are installed on the third fixture 18 by bolt fastening. There are four third positioning planes 20 and each third positioning plane 20 is also a boss. The second positioning plane 15 is against the bottom surface of the four corners of the mounting surface. The mounting surface of the shell is placed on the third positioning plane 20 as a reference surface. The plurality of third positioning planes 20 are distributed under the four corners of the mounting plate. Two third positioning pins 21 are installed on the third clamping plate 19. The third positioning pin 21 is arranged opposite to the top pin hole of the shell up and down. The bottom of the third positioning pin 21 A cylinder is fixed to the part by welding, and the top of the cylinder supports the mounting surface. The cylinder is mounted on the third clamping plate 19 by bolt fastening, and the third locating pin 21 extends into the locating pin hole of the mounting surface for positioning. The third locating pin 21 is located between the two third positioning planes 20. Two groups of third clamping assemblies 22 are respectively located on the third clamping plates 19 on the left and right sides of the E and F surfaces of the shell. One group of third clamping assemblies 22 presses the needle plate table of the shell, and the other group of third clamping assemblies 22 extends from the spindle hole on the F surface into the shell for pressing. The structure of the third pressing assembly is consistent with the first pressing assembly, so that the clamping and positioning of the shell is realized, which is convenient for processing the A, B, and C surfaces of the shell.

[0028] After the shell is clamped, it is rotated 90° counterclockwise, and the B surface is rough-milled and the hole system on the B surface of the shell is finely machined by the vertical machining center. Then the shell is rotated 90° clockwise, and the C surface is rough-milled and the hole system on the C surface of the shell is finely machined by the vertical machining center. The shell is rotated counterclockwise until one of the machine head bevels is horizontal, and the tool of the vertical machining center moves to the top of the machine head bevel, and the machine head bevel and the needle rod hole diameter are rough-milled by the vertical machining center. The shell is rotated clockwise to the level of the other machine head bevel, and the machine head bevel and the front side bevel hole diameter are rough-milled by the vertical machining center. After processing, the shell is rotated counterclockwise until the C surface faces up, and then the shell is rotated 90° clockwise, and the A surface is rough-milled and all the holes on the A surface are fine-machined. The shell is rotated clockwise to make the bevel on the A surface horizontal, and the bevel on the A surface and the holes on the bevel on the A surface are fine-milled by the vertical machining center. Then the shell is rotated counterclockwise until the C surface of the shell is horizontal, and then the shell is disassembled.

[0029] The fourth fixture 23 includes a fourth clamping plate 24, a fourth positioning plane 25, a fourth positioning pin 26 and a fourth clamping assembly 27. A plurality of fourth positioning planes 25 are installed on the fourth fixture 23. The mounting surface of the shell is placed on the fourth positioning plane 25 as a reference plane. The plurality of fourth positioning planes 25 are distributed below the four corners of the mounting plate. The fourth positioning plane 25 is a boss. Two fourth positioning pins 26 are installed on the fourth clamping plate 24 by bolt fastening. A cylinder is fixed at the bottom of the fourth positioning pin 26 by welding. The cylinder supports the mounting surface of the shell. The fourth positioning pin 26 extends into the positioning pin hole of the mounting surface for positioning. Two groups of fourth clamping assemblies 27 are installed on the fourth clamping plate 24. The fourth clamping assembly 27 is located at The outer sides of the A and B surfaces of the shell are clamped by the fourth clamping assembly 27 to clamp the protrusions on the A and B surfaces (wherein the A and B surfaces of the shell are divided into two parts, the top is an inwardly inclined inclined surface, and the bottom is a plane, and a protruding protrusion is formed between the plane and the inclined surface), and the fourth clamping assembly 27 has the same structure as the first clamping assembly 12; after the shell is clamped, the C surface and the hole system of the C surface are first fine-milled, and then the shell is rotated 90° counterclockwise, and the vertical machining center rough-mills the E surface and the face cover surface of the shell head, and the hole system of the E surface and the face cover surface is rough-machined, and the shell is rotated 180° clockwise again, and the vertical machining center rough-mills the F surface of the shell and the hole system on the F surface, thus completing all the processing content of the C surface and the rough processing content of the E and F surfaces.

[0030] Two turntables are installed on the rotating worktable 28 by bolt fastening, and the position of the turntable is switched by rotating the rotating worktable 28. A fifth fixture 30 is installed on each turntable by bolts, and the turntable can rotate around the Z axis. The fifth fixture 30 includes a fifth clamp 31, a fifth positioning plane 32, a fifth positioning pin 33 and a fifth clamping assembly 34, wherein one fifth clamp 31 is installed on the turntable by bolts, and a plurality of fifth positioning planes 32 are installed on the fifth fixture 30, and the mounting surface of the shell is placed on the fifth positioning plane 32 as a reference surface, and the plurality of fifth positioning planes 32 are distributed under the four corners of the mounting plate, and the fifth positioning plane 32 is a plurality of protrusions that support the mounting surface, and two fifth positioning pins 33 are installed on the fifth clamp 31. 3. A truncated cone is fixed on the bottom of the fifth locating pin 33 by welding, and the truncated cone is fixed on the fifth clamping plate 31 by welding. The fifth locating pin 33 extends into the locating pin hole of the mounting surface for positioning, and a fifth clamping assembly 34 is installed on the fifth clamping plate 31. The fifth clamping assembly structure includes a gantry and a pressure block, wherein a gantry is fixed on the fifth positioning plane 32 by welding, and a screw passes through the gantry, and the bottom of the screw, the fifth clamping assembly 34 clamps the top (C surface) of the shell, and the spindle hole and its axial hole of the E surface and the fine milling of the E surface are finished by the horizontal machining center, and the surface cover and the hole system on the fine milling surface cover are also fine milled. The shell is rotated 180°, and the horizontal machining center fine mills the F surface and the spindle hole and other axial holes on the finely machined F surface.

[0031] A 90° angle iron 35 is installed on another turntable by bolt fastening, and the fifth clamping plate 31 is installed on the angle iron 35 by bolts, so that the shell is clamped vertically. The fifth clamping assembly 34 is also pressed on the C surface of the shell. In this way, the orientation of the shell is adjusted by the turntable, and the front side hole and the needle bar hole on the inclined surface of the machine head are fine-machined by the horizontal machining center. The workpiece is rotated by the turntable so that the two inclined surfaces of the machine head are parallel to the tool of the horizontal machining center, and the needle bar hole on the inclined surface of the machine head is fine-machined. Then, the inclined surface of the machine head is fine-milled, and the processing of the shell is completed.

Claims

1. A rapid processing technology for a high-speed bag sewing machine housing, characterized in that:

1. Machining reference surface: The rough surface of the shell is positioned and clamped by the first fixture. The first fixture is positioned at three points on the bottom surface of the shell, one point on the side surface and two points on the back surface. The vertical machining center is used to fine-mill the mounting surface processing size of the shell, and the processing size of all holes on the mounting surface including the two positioning pin holes is fine-machined. The mounting surface and the positioning pin holes are used as the common reference surface and positioning holes for subsequent multiple processing procedures; 2. Rough milling turntable process: The shell is clamped by the second fixture, which is installed on the turntable of the horizontal machining center. The mounting surface processed in the first process is used as the reference surface, and the positioning pin hole on the mounting surface is used as the positioning hole. The two pins on one side are used for positioning, and then the top surface of the shell is pressed to achieve clamping. The horizontal machining center can rough mill the processing dimensions on the A surface, B surface, E surface, and F surface of the shell in sequence through the rotation of the turntable. The C surface is a pressing surface and cannot be processed; 3. Processing the A, B and C surfaces of the four-axis process: The shell is clamped by the third fixture, which is installed on the four-axis turntable of the vertical machining center. The third fixture uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. It is positioned by two pins on one side. The third fixture passes through the E and F surfaces of the shell and extends into the shell for compaction. The vertical machining center can finely process the straight hole system of the A, B and C surfaces of the shell and the inclined hole on the inclined surface of the A surface through the surrounding turntable; 4. Processing the C, E and F surfaces of the four-axis process: The shell is clamped by the fourth fixture, which is installed on the four-axis turntable of the vertical machining center. The fourth fixture uses the installation surface processed in the first process as the reference surface, and the positioning pin hole on the installation surface as the positioning hole. It is positioned by two pins on one side. The fourth fixture presses the outward protrusions on the A and B surfaces, and the vertical machining center performs rough milling on the C, E, F and the inclined surface of the shell through the four-axis turntable, and processes the hole system of the C, E and F surfaces at the same time; 5. Rough and fine machining process of the turntable: the turntable is divided into two sections by a partition. The fifth fixture is divided into two groups and the two groups of fixtures are respectively installed in the two sections of the turntable. A 90° angle iron is installed between one of the fifth fixtures and the turntable. The shell is clamped by the fifth fixture, so that vertical clamping and horizontal clamping of the shell are realized. The fifth fixture is installed on the four-axis turntable of the vertical machining center. The fifth fixture uses the mounting surface processed by the first process as the reference surface, and the pin holes on the mounting surface as the positioning holes. It is positioned by two pins on one side and the top of the shell is pressed. The vertically clamped shell is processed by the horizontal machining center to have the spindle holes on the E and F surfaces, the axial holes on the A and B surfaces, and the three-bend needle holes, and then the E and F surfaces are fine-milled. The horizontally clamped shell is processed by the horizontal machining center to have the needle bar holes.

2. According to claim 1, a rapid processing technology for a high-speed bag sewing machine housing is characterized in that; The shell is clamped upside down on the first fixture, which includes a first clamping plate, a bottom support block, a side limit block, a clamping push block and a first clamping assembly. A bottom support block is installed on the first clamping plate, and the tops of multiple bottom support blocks are in contact with the C surface of the shell. Side limit blocks in contact with the B surface and the F surface of the shell are installed on the first clamping plate respectively. A clamping push block in contact with the A surface of the shell is installed on the first clamping plate. The blank shell of the shell is positioned by six-point positioning. A first clamping assembly is also installed on the first clamping plate, and the first clamping assembly clamps the needle and thread plate of the shell. During processing, the mounting surface of the shell is first rough milled, and then the positioning pin holes and other mounting holes on the mounting surface are finely machined, and finally the mounting surface is finely milled.

3. The rapid processing technology of the high-speed bag sewing machine housing according to claim 2, characterized in that; The second fixture includes a second clamp, a second positioning plane, a second positioning pin and a second clamping assembly. Multiple second positioning planes are installed on the second fixture. The mounting surface of the shell is placed on the second positioning plane as a reference plane. The multiple second positioning planes are distributed under the four corners of the mounting plate. Two second positioning pins are installed on the second clamp. The second positioning pins extend into the positioning pin holes on the mounting surface for positioning. A second clamping assembly is installed on the second clamp, which passes through the shell and extends to the top of the shell. The C surface of the shell is clamped by the second clamping assembly.

4. The rapid processing technology of the high-speed bag sewing machine housing according to claim 3, characterized in that; The third fixture includes a third clamping plate, a third positioning plane, a third positioning pin and a third clamping assembly. Multiple third positioning planes are installed on the third fixture. The mounting surface of the shell is placed on the third positioning plane as a reference plane. Multiple third positioning planes are distributed under the four corners of the mounting plate. Two third positioning pins are installed on the third clamping plate. The third positioning pins extend into the positioning pin holes on the mounting surface for positioning. Two groups of third clamping assemblies are installed on the third clamping plate. The two groups of third clamping assemblies are respectively located on the third clamping plates on the left and right sides of the E and F surfaces of the shell. One group of third clamping assemblies presses the needle plate table of the shell, and the other group of third clamping assemblies extends from the spindle hole on the F surface into the shell for pressing.

5. The rapid processing technology of the high-speed bag sewing machine housing according to claim 4, characterized in that; After the shell is clamped, it is rotated 90° counterclockwise, and the B surface is rough-milled and the hole system of the B surface of the shell is finely machined by the vertical machining center. Then the shell is rotated 90° clockwise, and the C surface is rough-milled and the hole system of the C surface of the shell is finely machined by the vertical machining center. The shell is rotated counterclockwise to the level of one of the machine head bevels, and the machine head bevel is rough-milled and the needle bar hole diameter is roughly machined by the vertical machining center. The shell is rotated clockwise to the level of the other machine head bevel, and the machine head bevel is rough-milled and the front side bevel hole diameter is roughly machined. After processing, the shell is rotated counterclockwise until the C surface is facing up, and then the shell is rotated 90° clockwise, and the A surface is rough-milled and all the holes on the A surface are finely machined.

6. The rapid processing technology of the high-speed bag sewing machine housing according to claim 5, characterized in that; The fourth fixture includes a fourth clamp, a fourth positioning plane, a fourth positioning pin and a fourth clamping assembly. Multiple fourth positioning planes are installed on the fourth fixture. The mounting surface of the shell is placed on the fourth positioning plane as a reference plane. Multiple fourth positioning planes are distributed below the four corners of the mounting plate. Two fourth positioning pins are installed on the fourth clamp. The fourth positioning pins extend into the positioning pin holes of the mounting surface for positioning. Two groups of fourth clamping assemblies are installed on the fourth clamp. The fourth clamping assembly is located on the outside of the A surface and the B surface of the shell. The protrusions on the A surface and the B surface are clamped by the fourth clamping assembly. After the shell is clamped, the C surface and the hole system of the C surface are fine-milled first, and then the shell is rotated 90° counterclockwise, and the vertical machining center rough-mills the E surface and the face cover surface of the shell head, and the hole system on the E surface and the face cover surface is rough-machined. The shell is rotated 180° clockwise again, and the vertical machining center rough-mills the F surface of the shell and the hole system on the F surface.

7. The rapid processing technology of the high-speed bag sewing machine housing according to claim 6, characterized in that; There are two turntables installed on the rotating worktable, and a fifth tooling fixture is installed on each turntable. The fifth tooling fixture includes a fifth clamp, a fifth positioning plane, a fifth positioning pin and a fifth clamping assembly, one of the fifth clamps is installed on the turntable, and multiple fifth positioning planes are installed on the fifth tooling fixture. The mounting surface of the shell is placed on the fifth positioning plane as a reference plane, and multiple fifth positioning planes are distributed under the four corners of the mounting plate. Two fifth positioning pins are installed on the fifth clamp, and the fifth positioning pins extend into the positioning pin holes of the mounting surface for positioning. The fifth clamping assembly is installed on the fifth clamp, and the fifth clamping assembly clamps the top of the shell, and the spindle hole and the axial hole of the E surface and the fine milling of the E surface are processed by the horizontal machining center, and the surface cover and the hole system on the fine-machined surface are also fine-milled. The shell is rotated 180°, and the horizontal machining center fine-mills the F surface and the spindle hole and other axial holes on the fine-machined F surface.

8. The rapid processing technology of the high-speed bag sewing machine housing according to claim 7, characterized in that; A 90° angle iron is installed on one of the turntables, and the fifth clamping plate is installed on the angle iron, so that the shell can be clamped vertically. The fifth clamping assembly is also pressed on the C surface of the shell. In this way, the orientation of the shell is adjusted by the turntable, and the front side hole and the needle bar hole on the inclined surface of the machine head are fine-machined by the horizontal machining center.

Images