Multi-layer adjustable inner supporting tool

Abstract

In order to solve the technical problems that an existing thin-wall part auxiliary supporting tool can only support one layer or a local position each time, and effective and reliable supporting and fixing effects cannot be achieved in multi-layer casings with different diameters, the utility model provides a multi-layer adjustable inner supporting tool. The mandrel disc body, the multi-stage auxiliary supporting disc body unit and the manual self-locking unit are used for supporting the lower portion / upper portion, the middle portion and the upper portion / lower portion of the inner side wall of the thin-wall part correspondingly, layered and multi-part supporting of the thin-wall part is achieved, and the strength of the thin-wall part is improved. Moreover, all the manual self-locking units can be independently adjusted, each stage of auxiliary supporting disc body in the multi-stage auxiliary supporting disc body unit can be flexibly adjusted, and the self-adaptability to supported parts is high.

Description

Technical Field

[0001] The utility model relates to the field of machining, in particular to a multi-layer adjustable inner support tooling. Background Art

[0002] In the design of aerospace casing parts, thin-walled parts are becoming more and more common. Thin-walled parts are prone to vibration during processing, and vibration will affect the dimensional accuracy, shape and position accuracy and surface quality of their processing. Especially in turning, a small cutting force can also produce a lot of vibration. Therefore, during the processing of thin-walled parts, auxiliary supports are often added to them to minimize the adverse effects of vibration on their processing accuracy and surface quality. However, the existing thin-walled parts auxiliary support tooling can only support one layer or a local position at a time, and cannot achieve effective and reliable support and fixing in multiple layers of casings with different diameters. Utility Model Content

[0003] In order to solve the technical problem that the existing thin-walled parts auxiliary support tooling can only support one layer or a local position at a time and cannot achieve effective and reliable supporting and fixing effects in multiple layers of casings with different diameters, the utility model provides a multi-layer adjustable internal support tooling.

[0004] The technical solution of the utility model is:

[0005] A multi-layer adjustable inner support tooling is used for auxiliary support of thin-walled parts; the special feature is that it comprises a mandrel disc body, a workpiece support guide column, a cover plate and a locking nut arranged in sequence from bottom to top, and a multi-stage auxiliary support disc body unit sleeved outside the workpiece support guide column and supported by the mandrel disc body, and a plurality of manual self-locking units arranged on the multi-stage auxiliary support disc body unit;

[0006] The mandrel disc, the multi-stage auxiliary disc unit and the manual self-locking unit are respectively used to support the lower part, the middle part and the upper part of the inner wall of the thin-walled part, or respectively used to support the upper part, the middle part and the lower part of the inner wall of the thin-walled part;

[0007] The cover plate is used to press the thin-walled part.

[0008] Furthermore, the multiple manual self-locking units are evenly distributed along the circumference.

[0009] Further, the multi-stage auxiliary branch tray unit includes a primary auxiliary branch tray and a secondary auxiliary branch tray, the secondary auxiliary branch tray is arranged on the primary auxiliary branch tray, and the manual self-locking unit is arranged on the primary auxiliary branch tray and / or the secondary auxiliary branch tray.

[0010] Furthermore, the primary auxiliary branch disc body and the core shaft disc body are radially positioned and assembled by means of a precise clearance fit through the axial hole H6 / h6; the primary auxiliary branch disc body and the secondary auxiliary branch disc body are radially positioned and assembled by means of a precise clearance fit through the axial hole H6 / h6.

[0011] Further, the manual self-locking unit includes a self-locking bracket, a wedge self-locking block, a latch, a wedge rod, a wedge positioning column, a wedge positioning head bushing, an axial positioning spring, a radial reverse thrust spring, a guide pin 1 and a guide pin 2;

[0012] The self-locking bracket and the wedge self-locking block are arranged up and down and the stoppers are matched; a stepped through hole with a small top and a large bottom is axially arranged in the middle of the end face of the self-locking bracket, and an anti-rotation hole and a gap are opened on the side wall of the small hole in the stepped through hole; a wedge-shaped rod mounting hole is arranged in the middle of the end face of the wedge self-locking block, and a positioning column mounting hole and a pin mounting hole are respectively arranged on the two opposite side walls, and the wedge-shaped rod mounting hole, the positioning column mounting hole and the pin mounting hole are mutually connected;

[0013] The latch pin, wedge rod and axial positioning spring are arranged in sequence from top to bottom in a mounting cavity formed by the stepped through hole of the self-locking bracket and the wedge rod mounting hole of the wedge block self-locking block, and the lower part of the latch pin and the upper part of the wedge rod are located in the self-locking bracket, and the lower part of the wedge rod and the axial positioning spring are located in the wedge block self-locking block; an anti-rotation head is also provided between the latch pin and the self-locking bracket; a gasket is also installed at the upper end opening of the self-locking bracket to prevent the latch pin from falling out therefrom; the lower end of the axial positioning spring is limited by the multi-stage auxiliary support disc unit; the upper end of the wedge rod has a positioning shoulder, and the wedge rod mounting hole is a stepped hole, and the wedge rod is limited by the cooperation of the positioning shoulder and the stepped hole;

[0014] The side wall of the wedge rod is processed with a first wedge surface and a first guide groove, and the first guide groove is set at 180 degrees with the wedge surface; the guide pin is inserted into the first guide groove after being installed from the pin installation hole of the side wall of the wedge self-locking block;

[0015] The wedge-shaped positioning column is a stepped shaft, one end of which is processed with a second wedge surface, and the other end is used to support the inner wall of the thin-walled part, and the side wall is provided with a second guide groove; the wedge-shaped positioning column is installed in the positioning column mounting hole, and the second wedge surface of one end of the wedge-shaped positioning column is in contact with the first wedge surface of the side wall of the wedge-shaped rod, and the other end is located outside the positioning column mounting hole for internal support of the thin-walled part;

[0016] The wedge-shaped positioning head bushing is butted against the wedge block self-locking block from the side and is sleeved outside the wedge-shaped positioning column; a pin hole is provided on the side wall of the wedge-shaped positioning head bushing, and the second guide pin is inserted into the pin hole and simultaneously inserted into the second guide groove on the side wall of the wedge-shaped positioning column;

[0017] The radial reverse thrust spring sleeve is arranged outside the wedge-shaped positioning column and is limited by the wedge-shaped positioning head bushing and the shoulder of the wedge-shaped positioning column;

[0018] A first gasket is provided at the opening of the pin mounting hole on the side wall of the wedge self-locking block, and a second gasket is provided at the bottom of the wedge self-locking block. The supporting position of the wedge-shaped positioning column on the inner wall of the thin-walled part can be adjusted respectively by adjusting the thickness of the first gasket and the second gasket respectively.

[0019] Furthermore, the end surface of the end portion of the wedge-shaped positioning column for internally supporting the thin-walled member is a curved surface.

[0020] Furthermore, the workpiece support guide column is fixed to the mandrel disc body by bolts, the multi-stage auxiliary support disc body unit is fixed to the mandrel disc body by bolts, and the manual self-locking unit is fixed to the multi-stage auxiliary support disc body unit by bolts.

[0021] Furthermore, the core shaft disc body and the cover plate are both provided with a plurality of evenly distributed weight-reducing holes.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. All manual self-locking units in the utility model can be adjusted individually, and have strong adaptability to the supported parts.

[0024] 2. The auxiliary support discs of each level in the manual self-locking unit and the multi-level auxiliary support disc unit in the utility model can be flexibly adjusted to meet the internal support requirements of parts with different diameters, and have a wide range of applications.

[0025] 3. The utility model can carry out layering and multi-position support on thin-walled parts, thereby improving the strength of thin-walled parts and facilitating processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a thin-walled part to be clamped, (a) is a stereoscopic view, (b) is the main view, and (c) is a cross-sectional view at BB in (b).

[0027] Figure 2 It is a cross-sectional view of the utility model.

[0028] Figure 3 It is a cross-sectional view of the manual self-locking unit in the utility model.

[0029] Figure 4 It is a schematic structural diagram of the central shaft disc body of the utility model, (a) is a stereoscopic diagram, and (b) is a sectional view.

[0030] Figure 5It is a schematic structural diagram of a workpiece support guide column in the utility model, (a) is a stereoscopic diagram, (b) is a main view, (c) is a top view, and (d) is a cross-sectional view at cc in (c).

[0031] Figure 6 It is a schematic structural diagram of a primary auxiliary support disc in the present invention, (a) is a stereoscopic diagram, (b) is a top view, and (c) is a cross-sectional view at cc in (b).

[0032] Figure 7 This is a schematic diagram of the structure of the secondary auxiliary support disc in the utility model, (a) is a three-dimensional Figure 1 , (b) is a bottom view, (c) is a three-dimensional Figure 2 , (d) is a top view, and (e) is a cross-sectional view at EE in (d).

[0033] Figure 8 It is a schematic diagram of the structure of the cover plate in the utility model, (a) is a stereoscopic view, (b) is a main view, and (c) is a cross-sectional view at cc in (b).

[0034] Fig. 9 It is a schematic diagram of the structure of the wedge-shaped self-locking block in the utility model, (a) is a stereoscopic view, (b) is a main view, (c) is a cross-sectional view at cc in (b), (d) is a cross-sectional view at DD in (b), and (e) is a cross-sectional view at EE in (b).

[0035] Fig.10 This is a schematic diagram of the structure of the wedge-shaped positioning head bushing in the utility model, (a) is a three-dimensional Figure 1 , (b) is a three-dimensional Figure 2 , (c) is the main view, (d) is the cross-sectional view at CC in (c), and (e) is the side view.

[0036] Fig.11 Schematic diagram of the structure of the wedge-shaped positioning column in the utility model, (a) is a stereogram, (b) is a front view, and (c) is a side view.

[0037] Fig.12 This is a schematic diagram of the structure of the wedge-shaped rod in the utility model, (a) is a three-dimensional Figure 1 , (b) is a three-dimensional Figure 2 , (c) is the side view, and (d) is the front view.

[0038] Fig.13 Schematic diagram of the structure of the self-locking bracket in the utility model, (a) is the main view, (b) is the top view, (c) is the K-direction view in (b), (d) is the sectional view at BB in (b), and (e) is the stereogram.

[0039] Fig.14 It is a schematic diagram of the structure of the latch in the utility model, (a) is a stereogram, and (b) is a side view.

[0040] Fig.15 It is a structural schematic diagram of the anti-rotation head in the utility model.

[0041] Fig.16 It is a schematic structural diagram of the first gasket in the utility model, (a) is a stereoscopic diagram, (b) is a main view, and (c) is a cross-sectional view at BB in (b).

[0042] Fig.17 It is a structural schematic diagram of the second gasket in the utility model.

[0043] Reference numerals:

[0044] 1- spindle disc body; 101- positioning stepped hole; 102- annular boss; 103- weight reduction hole; 104- edge pressing;

[0045] 2-manual self-locking unit; 201-latch; 2011-blind hole; 2012-handheld operation part; 202-gasket cover; 203-self-locking bracket; 2031-transition cone; 2032-screw through hole; 2033-step through hole; 2034-gasket cover mounting hole; 2035-anti-rotation hole; 2036-avoidance; 204-wedge self-locking block; 2041-positioning column mounting hole; 2042-step hole; 2043-wedge rod mounting hole; 2044-limiting protrusion; 205-guide pin 1; 206-first gasket; 207-second gasket; 2071-through hole; 208-axial positioning spring; 209-radial reverse thrust spring; 210-second guide pin; 211-wedge-shaped positioning column; 2110-first cylindrical section; 2111-shoulder; 2112 second cylindrical section; 2113-second guide groove; 2114-second wedge surface; 212-wedge-shaped positioning head bushing; 213-wedge rod; 2131-first wedge surface; 2132-first guide groove; 2133-positioning shoulder; 214-anti-rotation head; 2141-ball head; 2142-cylindrical part.

[0046] 3-cover plate; 301-center hole; 302-weight-reducing through hole;

[0047] 4-workpiece support guide column; 401-cylindrical body; 402-positioning cylinder; 403-cover plate mounting column; 404-step hole;

[0048] 5-lock nut;

[0049] 6-first-level auxiliary support disc; 601-first rectangular groove; 602-boss; 603-first positioning stepped hole; 604-center stepped hole; 605-first center positioning boss;

[0050] 7-secondary auxiliary support disc body; 701-semicircular groove; 702-round hole; 703-second center positioning boss; 704-second rectangular groove; 705-second positioning stepped hole; 706-center through hole;

[0051] 8-Clamped parts. DETAILED DESCRIPTION

[0052] The utility model is further described below in conjunction with the accompanying drawings.

[0053] The multi-layer adjustable inner support tooling provided by the utility model can provide effective auxiliary support for casing parts during turning.

[0054] like Figure 1 As shown, the multi-layer adjustable internal support tooling of the embodiment of the utility model includes a core shaft disc body 1, a workpiece support guide column 4, a primary auxiliary support disc body 6, a secondary auxiliary support disc body 7, a cover plate 3, a locking nut 5 and a plurality of manual self-locking units 2 evenly distributed along the circumference.

[0055] The mandrel plate 1 is used to connect the entire inner support fixture to the machine tool worktable, specifically by threaded connection or clamping with a pressure plate, and is used to support the clamped parts and other components in the fixture. Figure 1 , 4 As shown, the mandrel disc body 1 is in the shape of a disk as a whole, and a positioning stepped hole 101 is provided in the middle of its upper end surface to match the lower surface of the workpiece support guide column 4. An annular boss 102 coaxial with the stepped hole 101 is provided on the upper end surface of the mandrel disc body 1 and outside the positioning stepped hole 101. The annular boss 102 is used to support the primary auxiliary support disc body 6 and position the clamped part 8. The edge of the mandrel disc body 1 is lower than the annular boss 102 to form a pressure edge 104, and the pressure edge 104 can be pressed by a pressure plate to fix the mandrel disc body 1 on the machine tool workbench. In addition, on the premise of ensuring the strength of the mandrel disc body 1, a plurality of evenly distributed weight-reducing holes 103 can be processed on the mandrel disc body 1 to reduce the total weight of the entire support tooling.

[0056] like Figure 1 , 5As shown, the workpiece support lead-in column 4 includes a cylindrical body 401, a positioning cylinder 402 disposed in the middle of the lower end face of the cylindrical body 401, a cover plate mounting column 403 disposed in the middle of the upper end face of the cylindrical body 401, and a plurality of stepped holes 404 evenly distributed along the circumference disposed on the upper end face of the cylindrical body 401, wherein the stepped holes 404 are bolt through holes. The workpiece support lead-in column 4 is disposed in the middle of the upper end of the spindle disk body 1, and the positioning cylinder 402 at the bottom of the workpiece support lead-in column 4 is inserted into and precisely matched with the positioning stepped hole 101 in the middle of the spindle disk body 1 with the shaft hole H6 / h6 clearance, so as to realize the radial positioning assembly of the workpiece support lead-in column 4; the side wall of the cover plate mounting column 403 in the middle of the upper end face of the workpiece support lead-in column 4 is processed with threads, so as to be Figure 8 After the cover plate 3 shown is buckled onto the clamped part 8, the cover plate mounting column 403 on the upper end face of the workpiece support guide column 4 passes through the center hole 301 of the cover plate 3, and the locking nut 5 is tightened on the cover plate mounting column 403, so that the cover plate 3 can be fixed, and then the part 8 is pressed by the cover plate 3. In order to facilitate the installation of the primary auxiliary support disc 6 and the secondary auxiliary support disc 7, the upper end of the cylindrical body 401 of the workpiece support guide column 4 is processed with a chamfer; similarly, in order to facilitate the installation of the cover plate 3, the upper end of the cover plate mounting column 403 on the upper end face of the workpiece support guide column 4 is processed with a chamfer. In order to reduce the weight of the tooling, a plurality of weight-reducing through holes 302 are opened on the cover plate 3, and these weight-reducing through holes 302 are located around the center hole 301 of the cover plate 3 and are arranged as evenly as possible; in addition to having a weight-reducing effect, the weight-reducing through holes 302 can also serve as a flow channel for coolant during processing to prevent the coolant from remaining in the parts.

[0057] like Figure 1 , 6As shown, the primary auxiliary support disc body 6 is sleeved outside the workpiece support guide column 4, and the lower end is positioned and supported on the annular boss 102 at the upper end of the core shaft disc body 1; the primary auxiliary support disc body 6 mainly serves as a mounting base for the secondary auxiliary support disc body 7, that is, it is mainly used to fix the secondary auxiliary support disc body 7; in addition, in some application scenarios, the primary auxiliary support disc body 6 can also be used as a mounting base for the manual self-locking unit 2; the primary auxiliary support disc body 6 is disc-shaped as a whole, and a plurality of first rectangular grooves 601 are evenly distributed along the circumference at the edge of its upper end surface, and a boss 602 is formed between two adjacent first rectangular grooves 601, wherein the first rectangular groove 601 is used to place the manual self-locking unit 2; the primary auxiliary support disc body 6 is disc-shaped as a whole, and a plurality of first rectangular grooves 601 are evenly distributed along the circumference at the edge of its upper end surface, and a boss 602 is formed between two adjacent first rectangular grooves 601, wherein the first rectangular groove 601 is used to place the manual self-locking unit 2; A center stepped hole 604 is axially provided in the middle of the upper end surface of the body 6, and a first center positioning boss 605 is axially provided in the middle of the lower end surface; a plurality of first positioning stepped holes 603 evenly distributed along the circumference are also provided on the upper end surface of the first-level auxiliary support disc body 6, and the first positioning stepped holes 603 are located between the first rectangular groove 601 and the center stepped hole 604, and the first positioning stepped hole 603 is a bolt through hole; the first center positioning boss 605 at the lower end of the first-level auxiliary support disc body 6 is inserted into the large hole of the positioning stepped hole 101 at the upper end of the core shaft disc body 1 and is radially positioned and assembled with the annular boss 102 at the upper end of the core shaft disc body 1 by means of precise clearance fit through the axial hole H6 / h6, and then fixed with bolts. The thickness and diameter of the primary auxiliary support disc 6 are determined according to the size of the supported part 8, the distribution and assembly position of the manual self-locking unit 2, and the height dimension of the manual self-locking unit 2, to ensure that the primary auxiliary support disc 6 does not contact the part 8, and to reserve sufficient installation position for the secondary auxiliary support disc 7 and the manual self-locking unit 2 thereon, to ensure that the manual self-locking unit 2 can support the inner wall of the part 8.

[0058] like Figure 1 , 7As shown, the secondary auxiliary support disc 7 is sleeved outside the workpiece support guide column 4 and is located on the primary auxiliary support disc 6; the main function of the secondary auxiliary support disc 7 is to serve as a mounting base for the manual self-locking unit 2, and is mainly used to fix the manual self-locking unit 2; the secondary auxiliary support disc 7 is disc-shaped as a whole, and a plurality of second rectangular grooves 704 are evenly distributed along the circumference at the edge of its upper end surface, and a semicircular groove 701 is provided on the side wall between two adjacent second rectangular grooves 704, wherein the second rectangular groove 704 is used to place the manual self-locking unit 2, and the semicircular groove 701 is used to avoid air in the circumferential direction; a center through hole 706 is axially opened in the middle of the secondary auxiliary support disc 7; a second center positioning boss 703 is axially provided in the middle of the lower end surface of the secondary auxiliary support disc 7; the second center positioning boss 703 at the lower end of the secondary auxiliary support disc 7 and the center stepped hole 604 in the middle of the upper end of the primary auxiliary support disc 6 are radially positioned and assembled by means of precise clearance fit of the axial hole H6 / h6, and then fixed with bolts. The end surface of the secondary auxiliary support disc 7 is provided with second positioning stepped holes 705 which are matched one by one with the first positioning stepped holes 603 on the primary auxiliary support disc 6. These second positioning stepped holes 705 are bolt through holes. The end surface of the secondary auxiliary support disc 7 is also provided with a plurality of circular holes 702 between the central through hole 706 and the second central positioning boss 703. These circular holes 702 can reduce weight on the one hand and can also serve as channels for coolant during processing to prevent coolant from remaining in the parts on the other hand. The outer circle of the secondary auxiliary support disc 7 is in contact with the inner wall of the part 8 to support it. The thickness of the secondary auxiliary support disc 7 is determined according to the size of the part 8, the distribution and assembly position of the manual self-locking unit 2, and the height of the manual self-locking unit 2, so as to ensure that there is enough installation position for the manual self-locking unit 2 and to ensure that the manual self-locking unit 2 can support the inner wall of the part 8.

[0059] There are multiple manual self-locking units 2, all of which are arranged on the upper end surface of the bottom of the secondary auxiliary support disc 7. After the part 8 and the supporting tooling of the utility model are assembled, the manual self-locking unit 2 is adjusted to achieve radial adaptation between the supporting tooling and the part 8, thereby providing effective internal support for the part 8.

[0060] like Figure 3 As shown, a single manual self-locking unit 2 includes a self-locking bracket 203, a wedge self-locking block 204, a latch 201, an anti-rotation head 214, a wedge positioning column 211, a wedge rod 213, a wedge positioning head bushing 212, a guide pin 1 205, a guide pin 210, an axial positioning spring 208, a radial reverse thrust spring 209, a first gasket 206, a second gasket 207 and a gasket cover 202.

[0061] The self-locking bracket 203 and the wedge self-locking block 204 are arranged up and down and the stoppers are matched. The latch pin 201, the wedge rod 213 and the axial positioning spring 208 are arranged in sequence from top to bottom in the installation cavity formed by the inner cavity of the self-locking bracket 203 and the stepped through hole in the middle of the end face of the wedge self-locking block 204; the lower part of the latch pin 201 and the upper part of the wedge rod 213 are located in the inner cavity of the self-locking bracket 203; the gasket cover 202 is installed at the upper end of the self-locking bracket 203 to prevent the latch pin 201 from falling out of the self-locking bracket 203; the lower part of the wedge rod 213 and the axial positioning spring 208 are located in the stepped through hole in the middle of the end face of the wedge self-locking block 204.

[0062] like Fig.13 As shown, the upper and lower outer walls of the self-locking bracket 203 are both cylindrical surfaces, the middle outer wall is a transition cone 2031 that is smaller at the top and larger at the bottom, and a screw through hole 2032 is provided on the transition cone 2031; a stepped through hole 2033 that is smaller at the top and larger at the bottom is provided in the middle of the self-locking bracket 203, and a limiting structure for limiting the axial position of the wedge rod 213 is formed at the step of the stepped through hole 2033; an anti-rotation hole 2035 and a gap 2036 are also provided on the side wall of the small hole of the stepped through hole 2033. A plurality of evenly distributed gasket cover mounting holes 2034 are also provided on the upper end surface of the self-locking bracket 203.

[0063] like Fig.14 As shown, the latch 201 includes a handheld operating part 2012, shaft section one and shaft section two which are connected in sequence; the diameter of shaft section one is smaller than that of shaft section two, and it forms a stepped shaft with shaft section two; a blind hole 2011 for installing the anti-rotation head 214 is radially opened on the upper side wall of shaft section two.

[0064] like Fig.15 As shown, the anti-rotation head 214 includes a coaxially arranged ball head 2141 and a cylindrical portion 2142. The anti-rotation head 214 is arranged between the latch pin 201 and the self-locking bracket 203. The cylindrical portion 2142 of the anti-rotation head 214 is located in the blind hole 2011 on the side wall of the latch pin 201 and has a clearance fit with the blind hole 2011. The ball head 2141 of the anti-rotation head 214 is located outside the blind hole 2011 on the side wall of the latch pin 201.

[0065] like Figure 3 , 9 As shown, the wedge-shaped self-locking block 204 is sleeved on the lower part of the wedge-shaped rod 213. The wedge-shaped self-locking block 204 has a rectangular shape, and its side walls are respectively provided with a positioning column mounting hole 2041 for accommodating the wedge-shaped positioning column 211 and a stepped hole 2042 for installing a guide pin 205. Its end face is provided with a wedge-shaped rod mounting hole 2043 that passes through the upper and lower end faces, and the positioning column mounting hole 2014 and the stepped hole 2042 on the side wall are both connected to the wedge rod mounting hole 2043.

[0066] like Figure 3 ,11 As shown, the wedge-shaped positioning column 211 includes a first cylindrical section 2110, a shoulder 2111 and a second cylindrical section 2112 connected in sequence; a second guide groove 2113 is provided on the side wall of the first cylindrical end section 2110, and the end of the second cylindrical section 2112 is processed into a second wedge surface 2114. The second wedge surface 2114 is used to fit with the first wedge surface on the side wall of the wedge rod 213; the shoulder 2111 is used to limit the position of the radial reverse thrust spring 209 on one hand, and on the other hand, it is used to cooperate with the limiting protrusion 2044 on the inner wall of the positioning column mounting hole 2041 of the side wall of the wedge-shaped self-locking block 204 and close to the wedge rod mounting hole 2043 to limit the position of the wedge positioning column 211; the second guide groove 2113 is used to install the guide pin 210.

[0067] like Fig.12 As shown, a positioning shoulder 2133 is provided at the upper end of the wedge rod 213, and a portion of the side wall is cut off to form a first wedge surface 2131 inclined downward and outward; a first guide groove 2132 extending axially is also processed on the side wall of the wedge rod 213, and the first guide groove 2132 is set at 180 degrees with the first wedge surface 2131.

[0068] like Figure 3 , 9 As shown in Figures 11 and 12, the end of the wedge-shaped positioning column 211 with a wedge surface is installed in the positioning column mounting hole 2041 of the wedge-shaped self-locking block 204, and the wedge rod 213 is installed in the wedge rod mounting hole 2043 of the wedge-shaped self-locking block 204. The second wedge surface 2114 of the wedge positioning column 211 fits with the wedge surface 2131 of the wedge rod 213 and the two can move relative to each other. The guide pin 205 is installed in the pin hole 2042 on the side wall of the wedge self-locking block 204, and one of its ends is inserted into the first guide groove 2132 on the side wall of the wedge rod 213, which is used to axially guide the wedge rod 213 and cooperate with the positioning shoulder 2133 on the upper end of the wedge rod 213 to limit its axial travel. Figure 3 , 11 As shown in FIG. 16 , the first gasket 206 is arranged at the opening of the stepped hole 2042 on the side wall of the wedge self-locking block 204. By adjusting the thickness of the first gasket 206, the distance between the front end of the manual self-locking unit (i.e., the edge of the manual self-locking unit in the radial direction of the part 8) and the rotation axis of the part 8 can be adjusted, so that the support diameter of the manual self-locking unit 2 can be adjusted in the radial direction.

[0069] like Figure 3 , Fig.10As shown, the wedge-shaped positioning head bushing 212 cooperates with the docking stop of the wedge block self-locking block 204, and is sleeved outside the first cylindrical end section 2110 of the wedge-shaped positioning column 211, and is used to fix and protect the wedge-shaped positioning column 211, that is, to ensure the axial height of the wedge-shaped positioning column 211 and avoid wear of the wedge-shaped positioning column 211; a central through hole 2121 for the wedge-shaped positioning column to pass through is provided in the middle of the wedge-shaped positioning head bushing 212; bolt through holes 2122 are provided on the end surface of the wedge-shaped positioning head bushing 212 on both sides of the central through hole 2121; a pin hole 2123 for installing the guide pin 210 is provided on the side wall of the wedge-shaped positioning head bushing 212, and the pin hole 2123 is located on the side wall of the wedge-shaped positioning head bushing 212 and is vertically connected with its central through hole 2121. At the same time, the position of the pin hole 2123 corresponds to the second guide groove 2113 on the side wall of the wedge-shaped positioning column 211. The guide pin 210 is installed in the pin hole 2123 on the side wall of the wedge-shaped positioning head bushing 212 and transitionally fits with it, and the end portion extends into the second guide groove 2113 on the side wall of the wedge-shaped positioning column 211, which is used to radially guide the wedge-shaped positioning column 211 and work together with the guide groove on the side wall of the wedge-shaped positioning column 211 to limit the radial stroke of the wedge-shaped positioning column 211.

[0070] like Figure 3 As shown, the axial positioning spring 208 is arranged at the bottom of the wedge rod 213, one end of which is limited by the bottom of the wedge rod 213, and the other end is limited by the secondary auxiliary support disc, which is used to axially support the wedge rod 213 and realize: when the part 8 is clamped, the axial positioning spring 208 is used to adjust the axial height of the wedge rod 213, and after the part 8 is clamped, the axial positioning spring 208 is used to realize the axial reset of the wedge rod 213.

[0071] like Figure 3 , 11 As shown, the radial reverse thrust spring 209 is sleeved outside the wedge-shaped positioning column 211, and is located between the wedge-shaped positioning column 211 and the wedge block self-locking block 204. One end is limited by the shaft shoulder 2111 on the wedge-shaped positioning column 211, and the other end is limited by the end face of the wedge-shaped positioning head bushing 212. It mainly plays a radial supporting role. When the part 8 is clamped, the end face position of the first cylindrical section 2110 of the wedge-shaped positioning column 211 is adjusted so that the end face of the first cylindrical section 2110 on the wedge-shaped positioning column 211 is completely fitted with the inner surface of the part 8; in order to better fit the first cylindrical section 2110 with the inner surface of the part 8, the end face of the first cylindrical section 2110 on the wedge-shaped positioning column 211 can be designed to be an arc shape that matches the inner surface of the supported part 8.

[0072] like Figure 3 , 17As shown, a through hole 2071 for the axial positioning spring 208 to pass through is provided in the middle of the second gasket 207; the second gasket 207 is arranged at the bottom of the wedge self-locking block 204; and the support height of the manual self-locking unit 2 can be adjusted axially by adjusting the thickness of the second gasket 207.

[0073] Reference Figure 3 , the self-locking principle of the manual self-locking unit 2 in the utility model:

[0074] The manual self-locking unit 2 is positioned and installed on the secondary auxiliary support disc 7 through the wedge-shaped self-locking block 204; when the part 8 is assembled, the pin 201 is pressed down to press the anti-rotation head 214 installed on the side wall of the pin 201 into the anti-rotation hole 2035 of the self-locking bracket 203, and the wedge rod 213 is pressed down at the same time to move the wedge rod 213 downward, and the axial positioning spring 208 is compressed to the minimum length through the downward movement of the wedge rod 213; after the assembly of the part 8 is completed, the anti-rotation head 214 is rotated out of the positioning groove of the self-locking bracket 203, and the anti-rotation head 214 enters the avoidance 2036 of the self-locking bracket 203, and the axial positioning spring 208 restores its elastic extension, pushing the wedge rod 213 to move upward, thereby causing the pin 201 to slide upward under the support of the wedge rod 213 until the first wedge surface 2131 of the wedge rod 213 is tightly attached to the second wedge surface 2114 of the wedge positioning column 211.

[0075] The principle of using the multi-layer adjustable inner support tooling of the utility model to support and position the part 8 is:

[0076] First, all the manual self-locking units 2 are installed and fixed on the secondary auxiliary support disc 7, and then the latch 201 of the manual self-locking unit 2 is pressed down to allow the anti-rotation head 214 to enter the positioning groove of the self-locking bracket 203.

[0077] Then, fix the mandrel disc body 1 on the machine tool workbench, adjust the mandrel disc body 1 until its outer circle runout is ≤0.01mm, and then lock the mandrel disc body 1 with bolts;

[0078] Third, install the workpiece support guide column 4: radially position it by means of the precise clearance fit of the shaft hole H6 / h6, and then connect and fix the workpiece support guide column 4 to the mandrel disc body 1 with bolts;

[0079] Fourth, install the primary auxiliary support disc body 6: radially position and assemble it by precise clearance fit of the shaft hole H6 / h6, and then connect and fix the primary auxiliary support disc body 6 to the mandrel disc body 1 with bolts;

[0080] Fifth, install the parts: Since the part 8 in this embodiment is a conical structure, the part 8 interferes with the secondary auxiliary support disc 7, so the part 8 must be installed before installing the secondary auxiliary support disc 7. The part 8 and the spindle disc 1 are also radially positioned and assembled by the precise clearance fit of the shaft hole H6 / h6;

[0081] Sixth, install the secondary auxiliary support disc 7: radially position and assemble by precise clearance fit of the shaft hole H6 / h6, and then connect and fix the secondary auxiliary support disc 7 to the primary auxiliary support disc 6 with bolts;

[0082] Seventh, install the cover plate 3: install the cover plate 3 on the workpiece support guide column 4, screw in the locking nut 5, and fix the cover plate 3 with the locking nut 5;

[0083] Finally, the anti-rotation heads 214 in all the manual self-locking units 2 are rotated out of the positioning grooves of the self-locking brackets 203, and the anti-rotation heads 214 enter the side grooves of the self-locking brackets 203. The axial positioning springs 208 are elastically stretched, and the latch pin 201 slides upward with the support of the wedge rod 213 until the wedge surface of the wedge positioning column 211 is tightly attached to the wedge surface of the wedge rod 213. During this process, the wedge positioning column 211 will also make a slight movement radially toward the inner wall of the part 8. Finally, the end of the wedge positioning column 211 will support the inner wall of the part 8 to achieve positioning support for the part 8. At this point, the assembly and fixation of the part 8 are completed, and processing can begin.

[0084] The overall height and radial dimensions of the manual self-locking unit 2 can be adaptively designed and adjusted according to the inner diameter of the part 8 during design, and each manual self-locking unit 2 can be designed and adjusted separately without affecting other manual self-locking units; the second gasket 207 and the first gasket 206 can fine-tune the axial and radial dimensions of the wedge-shaped positioning column 211; when the inner diameter size deviation of the part is small, the support of parts with different inner diameters can be adapted by replacing the manual self-locking unit 2; when the inner diameter size deviation of the part is large, the size of the first and / or second auxiliary support disc bodies can be adjusted by replacing the size to adjust the support diameter of the entire internal support tooling; the first and second auxiliary support disc bodies are independently adjusted in layers for easy operation, and compared with traditional single-layer support tooling, the multi-layer support tooling of the utility model has a larger support area and more support points for thin-walled parts, which improves the support strength of thin-walled parts and facilitates processing.

[0085] The adjustable internal support tooling in the above-mentioned embodiment has only two layers of auxiliary support discs. In embodiments of other application scenarios, for example, when auxiliary support is required for parts with larger diameters and heights, the tooling can also be designed to have three or even more layers of auxiliary support discs. In this case, the structural principle is the same, and it is only necessary to ensure that the auxiliary support discs of each layer and the manual self-locking units on the auxiliary support disc on the top layer do not interfere with each other during installation and adjustment.

Claims

1. A multi-layer adjustable inner support tooling for auxiliary support of thin-walled parts; characterized in that: It includes a spindle disc body, a workpiece support guide column, a cover plate and a locking nut which are arranged in sequence from bottom to top, a multi-stage auxiliary support disc body unit which is sleeved outside the workpiece support guide column and supported by the spindle disc body, and a plurality of manual self-locking units which are arranged on the multi-stage auxiliary support disc body unit; The mandrel disc, the multi-stage auxiliary disc unit and the manual self-locking unit are respectively used to support the lower part, the middle part and the upper part of the inner wall of the thin-walled part, or respectively used to support the upper part, the middle part and the lower part of the inner wall of the thin-walled part; The cover plate is used to press the thin-walled part.

2. The multi-layer adjustable inner support tooling according to claim 1 is characterized in that: The multiple manual self-locking units are evenly distributed along the circumference.

3. The multi-layer adjustable inner support tooling according to claim 2 is characterized in that: The multi-stage auxiliary branch tray unit includes a primary auxiliary branch tray and a secondary auxiliary branch tray, the secondary auxiliary branch tray is arranged on the primary auxiliary branch tray, and the manual self-locking unit is arranged on the primary auxiliary branch tray and / or the secondary auxiliary branch tray.

4. The multi-layer adjustable inner support tooling according to claim 3 is characterized in that: The first-level auxiliary branch disc body and the core shaft disc body are radially positioned and assembled by means of a precise clearance fit through the axial hole H6 / h6; the first-level auxiliary branch disc body and the second-level auxiliary branch disc body are radially positioned and assembled by means of a precise clearance fit through the axial hole H6 / h6.

5. The multi-layer adjustable inner support tooling according to any one of claims 1 to 4, characterized in that: The manual self-locking unit includes a self-locking bracket, a wedge self-locking block, a latch, a wedge rod, a wedge positioning column, a wedge positioning head bushing, an axial positioning spring, a radial reverse thrust spring, a guide pin 1 and a guide pin 2; The self-locking bracket and the wedge self-locking block are arranged up and down and the stoppers are matched; a stepped through hole with a small top and a large bottom is axially arranged in the middle of the end face of the self-locking bracket, and an anti-rotation hole and a gap are opened on the side wall of the small hole in the stepped through hole; a wedge-shaped rod mounting hole is arranged in the middle of the end face of the wedge self-locking block, and a positioning column mounting hole and a pin mounting hole are respectively arranged on the two opposite side walls, and the wedge-shaped rod mounting hole, the positioning column mounting hole and the pin mounting hole are mutually connected; The latch pin, wedge rod and axial positioning spring are arranged in sequence from top to bottom in a mounting cavity formed by the stepped through hole of the self-locking bracket and the wedge rod mounting hole of the wedge block self-locking block, and the lower part of the latch pin and the upper part of the wedge rod are located in the self-locking bracket, and the lower part of the wedge rod and the axial positioning spring are located in the wedge block self-locking block; an anti-rotation head is also provided between the latch pin and the self-locking bracket; a gasket is also installed at the upper end opening of the self-locking bracket to prevent the latch pin from falling out therefrom; the lower end of the axial positioning spring is limited by the multi-stage auxiliary support disc unit; the upper end of the wedge rod has a positioning shoulder, and the wedge rod mounting hole is a stepped hole, and the wedge rod is limited by the cooperation of the positioning shoulder and the stepped hole; The side wall of the wedge rod is processed with a first wedge surface and a first guide groove, and the first guide groove is set at 180 degrees with the wedge surface; the guide pin is inserted into the first guide groove after being installed from the pin installation hole of the side wall of the wedge self-locking block; The wedge-shaped positioning column is a stepped shaft, one end of which is processed with a second wedge surface, and the other end is used to support the inner wall of the thin-walled part, and the side wall is provided with a second guide groove; the wedge-shaped positioning column is installed in the positioning column mounting hole, and the second wedge surface of one end of the wedge-shaped positioning column is in contact with the first wedge surface of the side wall of the wedge-shaped rod, and the other end is located outside the positioning column mounting hole for internal support of the thin-walled part; The wedge-shaped positioning head bushing is butted against the wedge block self-locking block from the side and is sleeved outside the wedge-shaped positioning column; a pin hole is provided on the side wall of the wedge-shaped positioning head bushing, and the second guide pin is inserted into the pin hole and simultaneously inserted into the second guide groove on the side wall of the wedge-shaped positioning column; The radial reverse thrust spring sleeve is arranged outside the wedge-shaped positioning column and is limited by the wedge-shaped positioning head bushing and the shoulder of the wedge-shaped positioning column; A first gasket is provided at the opening of the pin mounting hole on the side wall of the wedge self-locking block, and a second gasket is provided at the bottom of the wedge self-locking block. The supporting position of the wedge-shaped positioning column on the inner wall of the thin-walled part can be adjusted respectively by adjusting the thickness of the first gasket and the second gasket respectively.

6. The multi-layer adjustable inner support tooling according to claim 5, characterized in that: The end surface of the end portion of the wedge-shaped positioning column used for internally supporting the thin-walled member is an arc surface.

7. The multi-layer adjustable inner support tooling according to claim 6, characterized in that: The workpiece support guide column is fixed to the mandrel disc body by bolts, the multi-stage auxiliary support disc body unit is fixed to the mandrel disc body by bolts, and the manual self-locking unit is fixed to the multi-stage auxiliary support disc body unit by bolts.

8. The multi-layer adjustable inner support tooling according to claim 7, characterized in that: The core shaft disc body and the cover plate are both provided with a plurality of evenly distributed weight-reducing holes.

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