Variable support multi-axis machining tool for thin-wall glass fiber reinforced plastic cylindrical part

Abstract

A variable support multi-axis machining tool for a thin-wall glass fiber reinforced plastic cylindrical part comprises a positioning core column capable of being positioned on the large face of an inner groove of the cylindrical part to be machined, the outer diameter values of the front section and the rear section of the positioning core column are fixed, the middle section of the positioning core column is variable, and the center and the periphery of the middle section of the positioning core column are hollowed out and connected through four connecting columns. The core rod is arranged at the central hollow part of the middle section of the positioning core column, a section of spring is pressed at the rear end of the core rod, four pushing blocks with arc-shaped outer sides are elastically connected to the outer sides of the four connecting columns respectively, the inner sides of the four pushing blocks abut against the outer surface of the core rod, and a central positioning block is arranged in a central stepped hole in the front end of the positioning core column; a through threaded hole I is formed in the middle of the center positioning block, and a bolt penetrates through the threaded hole I to press the core rod backwards, so that when the core rod moves backwards, the four pushing blocks are pushed outwards, and the outer diameter of the middle section of the positioning core column is increased to abut against the inner side wall of the to-be-machined cylindrical part. The clamp can stably clamp parts, avoids deformation of the parts caused by uneven stress, guarantees machining quality, and improves machining efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a machining tool, in particular to a variable support multi-axis machining tool for thin-wall glass steel cylindrical parts. BACKGROUND

[0002] As Figures 1 to 3 A kind of thin-wall glass steel cylindrical part, part is obtained by machining using glass steel bar stock, prior art is first processing the inner wall of thin-wall glass steel cylindrical part, then the outer surface is processed by positioning the inner hole of thin-wall glass steel cylindrical part, the line 2 of front end portion, the recess 3 between line, four lugs 4 in inner side of front end and the through hole thereon.However, since the inner side through hole of this thin-wall glass steel cylindrical part is stepped hole with large middle and small two ends, i.e. the diameter of inner groove large face 1 is larger than the diameter of two end holes, the diameter of positioning mandrel is equal to the diameter of part two ends, since the hole diameter of part middle section inner groove large face 1 is large, positioning mandrel cannot be attached to the inner side surface of part middle section, the wall thickness of part middle section is very thin (such as shown in Figure 3 , only 1mm thick at the thinnest part of middle section), deformation is easily caused by uneven force in processing process, affecting part quality.If filling material is used to position the inner hole of part, it is also difficult to ensure that filling material can uniformly fill the inner hole of part middle section, there is still the risk of deformation caused by uneven force due to ineffective internal support.In addition, line, recess between line, four lugs in inner side of upper end and the through hole thereon of part front end portion, such as after machining of outer circle is completed, to milling machining center is processed, since part wall thickness is small and not easy to clamp, it is also easy to clamp deformation, position error is large in multiple clamping, processing efficiency is also low. SUMMARY

[0003] The utility model aims at the defects existing in prior art, provide a kind of variable support multi-axis machining tool for thin-wall glass steel cylindrical part, can stably clamp part, avoid uneven force caused by part deformation, ensure processing quality, improve processing efficiency.

[0004] The utility model discloses a variable support multi-axis machining tooling for thin-wall glass steel cylindrical part, which comprises a positioning core column capable of being positioned in the large surface of the inner groove of the cylindrical part to be machined, wherein the positioning core column is a positioning column body with a variable outer diameter value in the middle section and fixed outer diameter values in the front and rear sections, the center and the periphery of the middle section of the positioning core column are hollowed out and connected by four connecting columns between the front and rear sections of the positioning core column, a central stepped hole penetrating through the hollowed-out part in the middle section is arranged in the middle part of the front end face of the positioning core column, a core rod is arranged in the hollowed-out part in the center of the middle section of the positioning core column, and a section of spring is pressed against the rear end of the core rod, the core rod is a circular table-shaped rod material with a large front end diameter and a small rear end diameter, four top pushing blocks with arc-shaped outer sides are elastically connected to the outer sides of the four connecting columns, respectively, the inner sides of the middle parts of the four top pushing blocks are extended inward and abut against the outer surface of the core rod, and the utility model further comprises a central positioning block arranged in the central stepped hole in the front end of the positioning core column, a threaded hole I is arranged in the middle part of the central positioning block, a screw I is arranged in the threaded hole I of the central positioning block, the screw I penetrates through the threaded hole I and presses the core rod backward to push the four top pushing blocks outward during the backward movement of the core rod, the outer diameter of the middle section of the positioning core column is increased, and the four top pushing blocks abut against the inner wall of the cylindrical part to be machined.

[0005] The further technical scheme of the utility model is that threaded holes II are arranged on the surfaces of the four connecting columns in the middle section of the positioning core column, the top pushing block comprises an outer connecting block with a circular-arc-shaped outer surface and an inner connecting block connected to the middle part of the inner side of the outer connecting block, a through hole is arranged on the outer connecting block, a screw II is connected to the threaded hole II on the surface of the connecting column after penetrating through a section of compression spring and the through hole of the outer connecting block, the compression spring is in an elastically deformable state, and the inner side of the inner connecting block abuts against the outer surface of the core rod.

[0006] The further technical scheme of the utility model is that threaded holes III are further arranged on both sides of the central stepped hole in the front end surface of the positioning core column, and a screw III is assembled in the threaded hole III to position the central positioning block in the central stepped hole.

[0007] The further technical scheme of the utility model is that the utility model further comprises an end pressing plate connected to the front end of the positioning core column and used for pressing the stepped surface of the inner side of the front end of the cylindrical part to be machined, the outer contour of the end pressing plate is circular, a through hole corresponding to the threaded hole in the middle part of the central positioning block is arranged in the middle part of the end pressing plate, four equally divided hollowed-out parts are formed between the middle part and the periphery of the end pressing plate, the adjacent hollowed-out parts are connected by connecting ribs to form a whole, and the positions of the four connecting ribs correspond to the positions of the four lugs on the inner side of the front end of the cylindrical part to be machined.

[0008] The further technical scheme of the utility model discloses: the connecting rib is also equipped with the hole of avoiding of mutual correspondence with the through -hole position on four lugs of the to-be-processed cylindrical part on still be equipped with two positioning pin holes I and two threaded holes IV on the front end surface of the positioning core column, the connecting rib is also equipped with the positioning pin hole II of mutual correspondence with the positioning pin hole I position, two screws IV and two threaded holes IV cooperate can fixed end plate is fixed in the front end of positioning core column.

[0009] The utility model discloses a variable support multi -axis processing frock of thin -walled glass steel cylindrical part has following beneficial effect: the positioning core column of design is the positioning column body of fixed diameter value of front and rear section while variable diameter value of middle section, control positioning core column middle section retraction before assembly, make positioning core column by one end put into the inside of to-be-processed cylindrical part, can through the change middle section positioning core column diameter value, positioning core column is positioned in the middle section inner groove large area of big hole diameter and thin wall thickness, can effectively support the middle section inner groove large area of big hole diameter and thin wall thickness, avoid the risk of deformation in the process because of uneven stress, effectively guarantee the processing quality, adopt the special-shaped end pressing plate of pressing the inside step surface of to-be-processed cylindrical part front end simultaneously in the positioning middle section, can complete the processing of the outside circle and the front end, the recessed portion between the scribe line, four lugs and the upper through -hole of the inside four lugs of the upper end in one clamping, clamping error is small, and the efficiency is high, can effectively guarantee the processing quality.

[0010] The utility model discloses a variable support multi -axis processing frock of thin -walled glass steel cylindrical part further explained below in connection with the drawings and examples. DRAWINGS

[0011] Figure 1 It is the structure schematic diagram of the thin -walled glass steel cylindrical part of need processing;

[0012] Figure 2 It is Figure 1 The front view of

[0013] Figure 3 It is Figure 2 The sectional view along A-A direction;

[0014] Figure 4 It is the to-be-processed cylindrical part blank;

[0015] Figure 5 It is the structure schematic diagram of the positioning core column of the utility model discloses a variable support multi -axis processing frock of thin -walled glass steel cylindrical part;

[0016] Figure 6 It is Figure 5 The plan view of multi -axis machine processing frock shown in

[0017] Figure 7 It is Figure 5 The sectional view along A-A direction;

[0018] Figure 8 This is a structural diagram of the positioning core column without the connecting core rod, four pushing blocks and the central positioning block in the middle section;

[0019] Figure 9 This is a structural diagram of the mandrel and four push blocks;

[0020] Figure 10 yes Figure 4 The diagram shows the structure of the cylindrical part to be processed mounted on a variable support multi-axis machining fixture for a thin-walled fiberglass cylindrical part according to this utility model.

[0021] Figure 11 yes Figure 10 Top view;

[0022] Explanation of reference numerals: 1-Inner groove surface, 2-Engraved line, 3-Recessed part, 4-Lug, 5-Cylindrical part to be processed, 6-Positioning core, 7-Screw I, 8-Center positioning block, 9-Positioning pin hole I, 10-Screw III, 11-Screw II, 12-Push block, 13-Threaded hole I, 14-Threaded hole III, 15-Core rod, 16-Connecting post, 17-Spring, 18-Center stepped hole, 19-Threaded hole IV, 20-Threaded hole II, 21-Spring positioning groove, 22-Outer connecting block, 23-Inner connecting block, 24-End pressure plate, 25-Screw IV, 26-Positioning pin, 27-Connecting rib, 28-Positioning pin hole II, 29-Allowing hole. Detailed Implementation

[0023] like Figures 5 to 9 As shown, the present invention provides a variable support multi-axis machining fixture for thin-walled fiberglass cylindrical parts, including a positioning core 6 that can be positioned on the large surface 1 of the groove inside the cylindrical part 5 to be processed, and an end pressure plate 24 connected to the front end of the positioning core 6 for pressing against the inner step surface of the front end of the cylindrical part 5 to be processed.

[0024] like Figures 5 to 9 As shown, the positioning core 6 is a positioning column with a fixed outer diameter at the front and rear sections and a variable outer diameter at the middle section. Figure 5 and Figure 7The direction of the arrow points to the front. The center of the middle section of the positioning core column 6 and the periphery are hollowed out and connected by four connecting columns 16 between the front and rear sections of the positioning core column 6. The outer side surface of the four connecting columns 16 is a flat surface. Two threaded holes II 20 are arranged on each side of the outer surface of the four connecting columns 16 of the middle section of the positioning core column 6. Four top pushing blocks 12 with circular arc-shaped outer sides are elastically connected to the outer sides of the four connecting columns 16. The inner sides of the middle sections of the four top pushing blocks 12 extend inward and abut against the outer surface of the core rod 15. The four top pushing blocks 12 can just fit together to form a cylindrical section. In this embodiment, the top pushing block 12 includes an outer connecting block 22 with a circular arc-shaped outer surface and an inner connecting block 23 connected to the inner side of the middle section of the outer connecting block 22 and extending inward. A through hole is arranged on the outer connecting block 22. The position of the through hole corresponds to the position of the threaded hole II 20. A screw II 11 passes through a compression spring and the through hole of the outer connecting block 22 and is connected to the threaded hole II 20 on the surface of the connecting column 16. The compression spring is located in the through hole and is sleeved on the shank of the screw II 11. The compression spring is in an elastically deformable state. The inner side of the inner connecting block 23 abuts against the outer surface of the core rod 15. A central stepped hole 18 is arranged in the middle section of the front end surface of the positioning core column 6 and penetrates the hollowed-out section of the middle section. Spring positioning grooves 21 are recessed in the inner sides of the rear ends of the four connecting columns 16. A core rod 15 is arranged in the hollowed-out section of the middle section of the positioning core column 6 and presses a spring 17 at the rear end of the core rod 15. The rear end of the spring 17 is positioned in the spring positioning groove 21. The front end of the spring 17 abuts against the rear end of the core rod 15. The core rod 15 is a circular truncated cone-shaped rod with a larger diameter at the front end and a smaller diameter at the rear end. A central positioning block 8 is arranged in the central stepped hole 18 of the front end of the positioning core column 6. A threaded hole I 13 is arranged in the middle section of the central positioning block 8 and penetrates the front and rear end surfaces of the central positioning block 8. A screw I 7 is arranged in the threaded hole I 13 of the central positioning block 8. The screw I 7 passes through the threaded hole I 13 and presses the core rod 15 rearward to move the core rod 15 rearward and push the four top pushing blocks 12 outward, so that the outer diameter of the middle section of the positioning core column 6 increases. The outward movement of the four top pushing blocks 12 allows the four top pushing blocks 12 to abut against the large face 1 of the inner groove of the cylindrical part 5 to be machined. Threaded holes III 14 are also arranged on both sides of the central stepped hole 18 of the front end surface of the positioning core column 6. When the central positioning block 8 is arranged in the central stepped hole 18, the screw III 10 assembled in the threaded hole III 14 can position the central positioning block 8 in the central stepped hole 18.

[0025] As Figure 10 , 11As shown, the outer contour of the end pressing plate 24 is circular, and the middle part of the end pressing plate 24 is provided with a through hole corresponding to the middle threaded hole 113 of the center positioning block 8, so that the position of the screw 17 in the center positioning block 8 can be adjusted through the through hole, and then the position of the mandrel 15 is adjusted, and finally the position of the four pushing blocks 12 is adjusted. The middle part of the end pressing plate 24 and the periphery form four equally divided hollow parts, and the curved profile surface between the adjacent lugs can be machined by the cutter through the hollow part during machining. The adjacent hollow parts are connected by the connecting ribs 27 to form a whole, and the positions of the four connecting ribs 27 correspond to the positions of the four lugs 4 on the inner side of the front end of the cylindrical part 5 to be machined. The connecting rib 27 is also provided with a clearance hole 29 corresponding to the position of the through hole on the four lugs 4 of the cylindrical part 5 to be machined, and the cutter can pass through the clearance hole 29 to machine the through hole on the lug 4. The front end surface of the positioning core column 6 is also provided with two positioning pin holes 19 and two threaded holes 119 (see also Figure 8 As shown), and the connecting rib 27 is also provided with a positioning pin hole 128 corresponding to the position of the positioning pin hole 119, and the two screws 125 cooperate with the two threaded holes 119 to fix the end pressing plate 24 on the front end of the positioning core column 6.

[0026] When the multi-axis machining tool is used for machining, the cylindrical part 5 to be machined is first positioned outside the positioning core column 6, Figure 4 As shown, the inner side of the cylindrical part 5 to be machined is positioned on the positioning core column 6, Figure 4 As shown, the inner side of the cylindrical part 5 to be machined is positioned on the positioning core column 6, Figures 1 to 3 As shown, the inner side of the cylindrical part 5 to be machined is positioned on the positioning core column 6, Figure 5 As shown, the inner side of the cylindrical part 5 to be machined is positioned on the positioning core column 6, Figure 10 、 11As shown, the end pressing plate 24 is pressed on the inner side of the front end of the cylindrical part 5 to be machined, the positioning pin holes II 28 on the connecting ribs 27 are respectively matched with the positioning pin holes I 19 on the front end surface of the positioning mandrel 6, then the positioning pins 26 are inserted, and finally the end pressing plate 24 is fixed on the front end of the positioning mandrel 6 by means of the cooperation of the two screws IV 25 and the two threaded holes IV 19. After that, the multi-axis machining tooling is installed on the workbench of the turning and milling machining center, the outer cylindrical surface machining of the cylindrical part 5 to be machined is completed first, then the machining of the front end part, the recess between the lines, the four lugs on the inner side of the front end and the through holes thereon is completed, and the turning, milling, drilling and marking four process machining can be completed at the same time by one clamping. When the part is unloaded, the end pressing plate 24 is removed first, then the front end of the center positioning block 8 is moved forward by means of the adjusting screw I 7 in the middle through hole, the four push blocks 12 are retracted during the forward movement of the mandrel 15, and the positioning mandrel 6 can be taken out when the push blocks 12 are retracted to the same diameter as the outer diameter of the front and rear positioning mandrels 6.

[0027] The above embodiments are only preferred embodiments of the present application, and the structure of the present application is not limited to the forms listed in the above embodiments. Any modification, equivalent replacement and the like made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A variable support multi-axis machining tooling for thin-walled glass steel cylindrical parts, comprising a positioning mandrel (6) able to be positioned inside the groove face (1) of the cylindrical part (5) to be machined, characterized in that, The positioning core column (6) is a positioning column body with fixed outer diameter values of the front and rear sections and variable outer diameter value of the middle section. The center and the periphery of the middle section of the positioning core column (6) are hollowed out and connected between the front and rear sections of the positioning core column (6) by four connecting columns (16). The middle part of the front end face of the positioning core column (6) is provided with a central stepped hole (18) penetrating through the hollowed-out center of the middle section. A core rod (15) is arranged in the hollowed-out center of the middle section of the positioning core column (6), and a section of spring (17) is pressed against the rear end of the core rod (15). The core rod (15) is a circular table-shaped rod material with a large diameter at the front end and a small diameter at the rear end. Four top pushing blocks (12) with arc-shaped outer sides are elastically connected to the outer sides of the four connecting columns (16). The inner sides of the middle parts of the four top pushing blocks (12) respectively extend inward and abut against the outer surface of the core rod (15). The center positioning block (8) is arranged in the central stepped hole (18) of the front end of the positioning core column (6). The middle part of the center positioning block (8) is provided with a threaded hole I (13). A screw I (7) is arranged in the threaded hole I (13) of the center positioning block (8). The screw I (7) passes through the threaded hole I (13) to press the core rod (15) backward, so that the core rod (15) moves backward and pushes the four top pushing blocks (12) outward, so that the outer diameter of the middle section of the positioning core column (6) increases, and the four top pushing blocks (12) abut against the inner wall of the to-be-processed cylindrical part (5).

2. A variable support multi-axis machining tooling for thin-walled fiberglass steel cylindrical parts as claimed in claim 1, characterized in that, The surfaces of the four connecting columns (16) of the middle section of the positioning core column (6) are provided with threaded holes II (20). The top pushing block (12) includes an outer connecting block (22) with a circular arc-shaped outer surface and an inner connecting block (23) connected to the middle part of the inner side of the outer connecting block (22). The outer connecting block (22) is provided with a through hole. A screw II (11) passes through a section of compression spring and the through hole of the outer connecting block (22) and is connected with the threaded hole II (20) on the surface of the connecting column (16). The compression spring is in an elastically deformable state. The inner side of the inner connecting block (23) abuts against the outer surface of the core rod (15).

3. A variable support multi-axis machining tooling for thin-walled fiberglass steel cylindrical parts as claimed in claim 1, wherein, The central stepped hole (18) on the front end surface of the positioning core column (6) is further provided with threaded holes III (14) on both sides. The assembly of the screw III (10) in the threaded hole III (14) can position the center positioning block (8) in the central stepped hole (18).

4. A variable support multi-axis machining tooling for thin-walled fiberglass steel cylindrical parts as claimed in claim 1, wherein, The end pressing plate (24) connected to the front end of the positioning core column (6) is used to press the front end inner side step surface of the to-be-processed cylindrical part (5). The outer contour of the end pressing plate (24) is circular. The middle part of the end pressing plate (24) is provided with a through hole corresponding to the threaded hole in the middle part of the center positioning block (8). Four equally divided hollow parts are formed between the middle part and the periphery of the end pressing plate (24). The adjacent hollow parts are connected by connecting ribs (27) to form a whole. The positions of the four connecting ribs (27) correspond to the positions of the four lugs on the front end inner side of the to-be-processed cylindrical part (5).

5. A variable support multi-axis machining tooling for thin-walled fiberglass steel cylindrical parts as claimed in claim 4, wherein, The connecting rib (27) is further provided with avoiding holes (29) corresponding to the through holes on the four lugs of the to-be-processed cylindrical part (5), the front end surface of the positioning core column (6) is further provided with two positioning pin holes I (9) and two threaded holes IV (19), the connecting rib (27) is also provided with positioning pin holes II (28) corresponding to the positions of the positioning pin holes I (9), and the two screws IV (25) are matched with the two threaded holes IV (19) to fix the end pressing plate (24) on the front end of the positioning core column (6).

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