Multi-procedure machining clamp for guaranteeing roundness of annular product and using method of multi-procedure machining clamp

Abstract

The invention discloses a multi-procedure machining clamp for guaranteeing the roundness of an annular product and a using method, and relates to the technical field of workpiece deformation prevention. Comprising a circular-ring-shaped workpiece. The end face of the workpiece is suitable for machining arc-shaped grooves and mounting holes; a cross-shaped track groove is formed in the base plate; a positioning hole is formed in the base plate, a center groove is formed in the middle of the cross-shaped rail groove, and a center hole is formed in the center groove; the multiple sets of petal bodies are arranged, and the multiple sets of petal bodies are synchronously installed on the base disc and abut against the inner wall of the workpiece at equal intervals in the circumferential direction; a locking hole is formed in the cone part; an elastic piece is movably mounted in the central groove; and the locking screw rod is inserted into the locking hole and is in threaded connection with the center hole, so that the technical problems that the roundness is difficult to guarantee when workpieces of various models are machined, and the workpieces and the clamp are difficult to fall off due to blockage of sweeps are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece anti-deformation, and specifically to a multi-process machining fixture for ensuring the roundness of annular products and its usage method. Background Art

[0002] For metal annular workpieces, according to the actual product requirements, it is necessary to groove and drill holes on the surface. On the one hand, after the metal annular workpiece is formed, due to its material such as aluminum products, it is easy to deform, resulting in changes in concentricity and perpendicularity. On the other hand, during grooving or hole-opening machining, thermal deformation is likely to occur during machining, resulting in non-compliance of the concentricity or perpendicularity of the workpiece, and it is difficult to repair subsequently.

[0003] There are also the following problems:

[0004] Firstly, for the installation of the existing fixture, the equipment needs to reserve a separate clamping position for the fixture, which requires special modification.

[0005] Secondly, for the workpiece, the existing fixture can only ensure that the arc at the clamping position does not change, and it can only adapt to a single model of annular workpiece.

[0006] Thirdly, for the processing of aluminum products or aluminum alloy products, the generated aluminum chips are likely to cause blockage between the fixture and the workpiece, resulting in difficulty in quickly detaching the fixture from the workpiece.

[0007] Therefore, we provide a multi-process machining fixture for ensuring the roundness of annular products and its usage method to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to make up for the deficiencies of the existing technology, and provide a multi-process machining fixture for ensuring the roundness of annular products and its usage method to solve the technical problems that it is difficult to ensure the roundness of workpieces of various models during machining, and the waste chips are blocked, resulting in difficulty in detaching the workpiece from the fixture.

[0009] To solve the above technical problems, the present invention provides the following technical solutions:

[0010] A multi-process machining fixture for ensuring the roundness of annular products, including a workpiece, the workpiece being annular; the end face of the workpiece is suitable for machining an arc groove and an installation hole; it further includes:

[0011] A base plate, on which a cross track groove is provided; a positioning hole is installed on the base plate, a central groove is installed in the middle of the cross track groove, and a central hole is installed in the central groove;

[0012] Petal bodies, multiple groups of petal bodies are synchronously installed on the base plate and circumferentially and equidistantly abut against the inner wall of the workpiece;

[0013] A cone-shaped part, in which a locking hole is provided; an elastic part is movably installed in the central groove;

[0014] A locking screw rod is inserted into a locking hole and threadedly connected to a central hole.

[0015] In a further technical solution, the petal body includes fan-shaped blocks, and a clearance groove is formed on one side of the fan-shaped block facing the workpiece. There are multiple groups of clearance grooves, and they are arranged in parallel;

[0016] A connecting bar is installed at the bottom of the fan-shaped block, and the connecting bar is connected in a cross-shaped track groove.

[0017] In a further technical solution, the end cross-section of the cross-shaped track groove is in the shape of a dovetail opening, the bottom of the connecting bar is in the shape of a dovetail strip, and the connecting bar is adapted to the cross-shaped track groove;

[0018] An arc surface is formed in the middle of the cross-shaped track groove. There are multiple groups of arc surfaces, and the diameter of the common circle is not less than the diameter of the central groove.

[0019] In a further technical solution, the conical member includes a conical head and a fixed cylinder, and the conical head is integrally connected to the fixed cylinder; and the diameter of the conical head is larger than the diameter of the fixed cylinder;

[0020] The fixed cylinder is adapted to an elastic member inserted into the central groove, and the elastic member is adapted to be sleeved outside the fixed cylinder; the elastic member is in movable abutment with the end face of the fixed cylinder facing the central hole;

[0021] The conical head and the fixed cylinder are coaxial and a locking hole is formed in the middle.

[0022] In a further technical solution, the elastic member includes a bearing spring, and the bearing spring is installed in the central groove, one end is in movable abutment with the fixed cylinder, and the other end is in movable abutment with the inner wall of the central groove.

[0023] In a further technical solution, the elastic member includes an inner ring and an outer ring, the inner ring and the outer ring are coaxially arranged, and a closing plate is installed at the end facing away from the conical head;

[0024] A working ring is installed between the inner ring and the outer ring, and transition holes are formed in the middle of the closing plate and the working ring; the aperture of the transition hole is larger than the aperture of the central hole. An elastic guiding structure is installed at the bottom of the working ring, and the working ring is in movable abutment with the fixed cylinder.

[0025] In a further technical solution, the elastic guiding structure includes guide bars. Guide bars are formed between the inner ring and the outer ring, guide columns are installed between the inner ring and the outer ring, guide grooves are formed on both sides of the guide columns, and the guide grooves are adapted to the guide bars; a position spring is installed between the guide columns and the closing plate;

[0026] Multiple groups of guide columns are installed and a working ring is commonly installed, and the working ring is in abutment with the fixed cylinder.

[0027] In a further technical solution, when the conical part is installed in the central hole through the locking screw, the end face of the conical part away from the central hole does not extend beyond the end face of the petal body facing away from the base plate;

[0028] The thickness of the petal body is not greater than the thickness of the workpiece.

[0029] A method for using a multi-process machining fixture for ensuring the roundness of an annular product, comprising the following steps:

[0030] Step 1, position and install the base plate, and disassemble and connect it to the workbench by installing positioning bolts in the positioning holes;

[0031] Step 2, insert the connecting strip of the petal body into the lateral cross-track groove, and the large-diameter outer side of the sector plate faces away from the outer side of the central hole; four groups of sector plates are installed and are installed corresponding to the cross-track grooves; the small-diameter side plates of the four groups of sector plates are abutted against each other;

[0032] Step 3, install the elastic member in the central groove; the outer ring of the elastic member is adapted to the inner diameter of the central groove;

[0033] Step 4, install the workpiece, the central axis of the workpiece is installed on the central hole, and at this time the workpiece is separated from the petal body;

[0034] Step 5, install the conical part, and insert the fixing cylinder of the conical part into the elastic member;

[0035] Step 6, install the locking screw, the locking screw is inserted into the locking hole and penetrates through the elastic member inward, and the end is thread-locked with the central hole, driving the conical part to squeeze the elastic member; the locking hole is a stepped hole, and when the locking screw is completely fixed, the end is located in the locking hole;

[0036] The conical head of the conical part squeezes the sector block outward until the sector plate abuts against the inside of the workpiece;

[0037] Step 7, process the workpiece including processing an arc groove and a mounting hole;

[0038] Step 8, after processing the workpiece, remove the locking screw, and the elastic member squeezes the conical part outward; so that the petal body is quickly separated from the workpiece.

[0039] Compared with the prior art, the following beneficial effects are achieved:

[0040] The multi-group petal blocks synchronously extruded in the present invention ensure that they are movably abutted against the inner wall of the annular workpiece coaxially, ensuring the roundness, concentricity and perpendicularity of the annular workpiece; secondly, the sector plate contacts the workpiece, ensuring a relatively large area of contact with the annular workpiece and reducing the thermal influence of processing.

[0041] The dovetail-shaped cross-track groove of the present invention is connected to the connecting bar, which can restrict the connecting bar from shaking along the circumference, ensure sliding with limited degrees of freedom, and can only move radially along the cross-track groove and cannot be disengaged axially up and down, ensuring the supporting effect of the petal bodies on the connecting bar and ensuring that multiple groups of petal blocks contract inward or expand outward synchronously.

[0042] The cone squeezes the spring and is positioned by bolts. The inclined surface squeezes the petal body to make it abut against the annular workpiece. When disassembling, the cone piece is quickly disengaged from the petal body by the spring reset, and the petal body is quickly disengaged from the annular workpiece. Due to the clearance groove on the petal body, it is ensured that there is a clearance during fitting, facilitating rapid blanking.

[0043] The present invention uses multiple groups of guide posts to realize sliding along the guide bar by opening guide grooves, thereby determining that multiple groups of guide posts slide along the axis of the closed plate. The working ring at the top abuts against the fixed cylinder below, and the closed plate at the bottom is carried in the central groove; multiple groups of guide posts and position springs bear pressure, which can ensure the service life of the elastic parts. Brief Description of the Drawings

[0044] Figure 1 is the working structure diagram of the multi-process processing fixture for ensuring the roundness of the annular product of the present invention;

[0045] Figure 2 is the structural schematic diagram of the workpiece of the present invention;

[0046] Figure 3 is the side view of the multi-process processing fixture for ensuring the roundness of the annular product of the present invention Figure 1 ;

[0047] Figure 4 is Figure 3 the sectional view taken along A-A of

[0048] Figure 5 is the structural schematic diagram of the base plate of the present invention;

[0049] Figure 6 is the structural schematic diagram of the cone piece of the present invention;

[0050] Figure 7 is the structural schematic diagram of the petal body of the present invention;

[0051] Figure 8 is the side view of the multi-process processing fixture for ensuring the roundness of the annular product of the present invention Figure 2 ;

[0052] Figure 9 is Figure 8 the sectional view taken along B-B of

[0053] Figure 10 is of the present invention Figure 9 the enlarged view of part C of

[0054] Figure 11 Structural diagram of another elastic member of the present invention;

[0055] Figure 12 Top view schematic diagram of the elastic member of the present invention (removing the working ring);

[0056] In the figure: 1, base plate; 11, cross track groove; 12, positioning hole; 13, central groove; 14, central hole; 15, arc surface;

[0057] 2, petal body; 21, sector block; 22, gap groove; 23, connecting bar;

[0058] 3, cone member; 31, locking hole; 32, cone head; 33, fixed cylinder;

[0059] 4, elastic member; 41, load-bearing spring; 42, inner ring; 43, outer ring; 44, closing plate; 45, transition hole; 46, working ring; 47, guide bar; 48, guide post; 49, guide groove; 410, position spring;

[0060] 5, locking screw;

[0061] 100, workpiece; 101, arc groove; 102, mounting hole. Specific embodiments

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] Embodiment 1

[0064] Please refer to Figures 1-7 As shown, a technical solution provided by the present invention, a multi-process machining fixture for ensuring the roundness of a ring-shaped product, includes a workpiece 100, and the workpiece 100 is ring-shaped; the end face of the workpiece 100 is suitable for machining an arc groove 101 and a mounting hole 102; further includes:

[0065] A base plate 1, on which a cross track groove 11 is opened; a positioning hole 12 is installed on the base plate 1, a central groove 13 is installed in the middle of the cross track groove 11, and a central hole 14 is installed in the central groove 13;

[0066] As Figure 7As shown, there are multiple groups of petal bodies 2. The multiple groups of petal bodies 2 are synchronously installed on the base plate 1 and circumferentially and equidistantly abut against the inner wall of the workpiece 100. The petal body 2 includes a sector block 21, and a gap groove 22 is formed on the side of the sector block 21 facing the workpiece 100. There are 2 groups of gap grooves 22, and they are arranged in parallel. A connecting strip 23 is installed at the bottom of the sector block 21, and the connecting strip 23 is connected in the cross track groove 11. The length of the connecting strip 23 is the same as the length of the sector block cylinder, and there are two groups of gap grooves.

[0067] As Figure 6 shown, there is a cone part 3. A locking hole 31 is formed in the cone part 3; an elastic part 4 is movably installed in the central groove 13; the cone part 3 includes a cone head 32 and a fixed cylinder 33, and the cone head 32 is integrally connected with the fixed cylinder 33; the cone head 32 and the fixed cylinder 33 are coaxial and a locking hole 31 is formed in the middle, and the diameter of the cone head 32 is larger than the diameter of the fixed cylinder 33; the fixed cylinder 33 is adapted to be inserted into the elastic part 4 in the central groove 13, and the elastic part 4 is adapted to be sleeved outside the fixed cylinder 33; the elastic part 4 is movably abutted against the end face of the fixed cylinder 33 facing the central hole 14; in this embodiment, the elastic part adopts a load-bearing spring 41; the elastic part 4 includes a load-bearing spring 41, the load-bearing spring 41 is installed in the central groove 13, one end is movably abutted against the fixed cylinder 33, and the other end is movably abutted against the inner wall of the central groove 13.

[0068] A locking screw 5 is inserted into the locking hole 31 and threadedly connected to the central hole 14. As Figure 4 shown, the length of the locking screw 5 should be greater than the length of the cone part and can extend to be threadedly connected to the central hole.

[0069] As Figure 5 shown, the end cross section of the cross track groove 11 is in the shape of a dovetail mouth, the bottom of the connecting strip 23 is in the shape of a dovetail strip, and the connecting strip 23 is adapted to the cross track groove 11; an arc surface 15 is formed in the middle of the cross track groove 11. There are multiple groups of arc surfaces 15, and the circular diameter of the common circle is not less than the groove diameter of the central groove 13. The dovetail groove and the dovetail slider ensure limited-degree-of-freedom sliding, and then ensure that multiple groups of petal blocks contract or expand synchronously inward. The dovetail-mouth-shaped cross track groove is connected to the connecting strip, which can restrict the connecting strip from shaking along the circumference, and can only move radially along the cross track groove and cannot be disengaged axially up and down, ensuring the supporting effect of the petal body on the connecting strip. By synchronously installing multiple groups of petal bodies circumferentially, it is possible to ensure a large contact area with the annular workpiece, reduce the thermal influence during processing, and thus ensure the roundness, concentricity and perpendicularity of the annular workpiece.

[0070] The conical body squeezes the spring and is positioned by bolts. The inclined surface squeezes the petal body so that it abuts against the annular workpiece. When disassembling, the spring reset drives the conical part to quickly disengage from the petal body, and the petal body quickly disengages from the annular workpiece. Due to the gap grooves on the petal body, it is ensured that there is a gap in the fit, facilitating rapid blanking.

[0071] As Figure 1 shown, when the conical part 3 is installed in the central hole 14 through the locking screw 5, the end surface of the conical part 3 away from the central hole 14 does not extend beyond the end surface of the petal body 2 facing away from the base plate 1; the thickness of the petal body 2 is not greater than the thickness of the workpiece 100.

[0072] The usage method of a multi-process machining fixture for ensuring the roundness of annular products includes the following steps:

[0073] Step 1, position and install the base plate 1, and disassemble and connect it to the workbench by installing positioning bolts in the positioning holes 12;

[0074] Step 2, insert the connecting strip 23 of the petal body 2 into the lateral cross-track groove 11, and the large-diameter outer side of the fan-shaped plate faces the outer side away from the central hole 14; four groups of fan-shaped plates are installed, and they are installed corresponding to the cross-track groove 11; the small-diameter side plates of the four groups of fan-shaped plates abut against each other;

[0075] Step 3, install the elastic part 4 in the central groove 13; the outer ring of the elastic part 4 is adapted to the inner diameter of the central groove 13;

[0076] Step 4, install the workpiece 100, and install the central axis of the workpiece 100 on the central hole 14, and at this time the workpiece 100 is separated from the petal body 2;

[0077] Step 5, install the conical part 3, and insert the fixing cylinder 33 of the conical part 3 into the elastic part 4;

[0078] Step 6, install the locking screw 5, insert the locking screw 5 into the locking hole 31 and penetrate inward through the bearing spring 41, and thread-lock the end with the central hole 14, driving the conical part 3 to squeeze the bearing spring 41; the locking hole 31 is a stepped hole, and when the locking screw 5 is completely fixed, the end is located in the locking hole 31;

[0079] The conical head 32 of the conical part 3 squeezes the sector block 21 outward until the fan-shaped plate abuts against the inside of the workpiece 100;

[0080] Step 7, process the workpiece 100 including processing the arc groove 101 and the mounting hole 102;

[0081] Step 8, after processing the workpiece 100, remove the locking screw 5, and the elastic part 4 squeezes the conical part 3 outward; so that the petal body 2 quickly disengages from the workpiece 100.

[0082] Embodiment 2

[0083] As Figures 8-12 shown, this is another embodiment of the present invention. Based on Example 1, since the load-bearing spring is prone to failure after long-term use, as Figure 10 and 11 designed, the elastic member 4 includes an inner ring 42 and an outer ring 43. The inner ring 42 and the outer ring 43 are coaxially arranged, and a closing plate 44 is installed at the end facing away from the cone head 32. The closing plate 44 is provided with a transition hole 45; the aperture of the transition hole 45 is larger than the aperture of the central hole 14; a working ring 46 is installed between the inner ring 42 and the outer ring 43. An elastic guiding structure is installed at the bottom of the working ring 46, and the working ring 46 is in movable abutment with the fixed cylinder 33.

[0084] As Figure 10 and 12 shown, the elastic guiding structure includes a guiding bar 47. A guiding bar 47 is provided between the inner ring 42 and the outer ring 43. The length of the guiding bar is less than the length of the guiding groove 49. Guide posts 48 are installed between the inner ring 42 and the outer ring 43. Guide grooves 49 are provided on both sides of the guide posts 48. The guide grooves 49 are adapted to the guiding bar 47; a positioning spring 410 is installed between the guide posts 48 and the closing plate 44; multiple groups of guide posts 48 are installed, and a working ring 46 is installed together. The working ring 46 is in abutment with the fixed cylinder 33.

[0085] In this embodiment, multiple groups of guide posts are used to realize the sliding of the guide grooves along the guiding bar, so as to determine the sliding of multiple groups of guide posts along the axis of the closing plate. The working ring at the top abuts under the fixed cylinder, and the closing plate at the bottom is carried in the central groove; multiple groups of guide posts and positioning springs bear pressure, which can ensure the service life of the elastic member.

[0086] The usage method of a multi-process processing fixture for ensuring the roundness of a ring-shaped product includes the following steps:

[0087] Step 1, position and install the base plate 1, and disassemble and connect it to the workbench by installing positioning bolts in the positioning holes 12;

[0088] Step 2, insert the connecting strip 23 of the petal body 2 into the lateral cross-track groove 11, and the large-diameter outer side of the fan-shaped plate faces away from the outer side of the central hole 14; four groups of fan-shaped plates are installed and are installed corresponding to the cross-track groove 11; the small-diameter side plates of the four groups of fan-shaped plates are in abutment;

[0089] Step 3, install the elastic member 4 in the central groove 13; the outer ring of the elastic member 4 is adapted to the inner diameter of the central groove 13;

[0090] Step 4, install the workpiece 100. The central axis of the workpiece 100 is installed on the central hole 14, and at this time the workpiece 100 is separated from the petal body 2;

[0091] Step 5: Fix the guide post, working ring and closing plate in advance; the closing plate 44 of the elastic member is bonded in the central groove, and the guide rod is inserted into the middle during installation to ensure coaxiality;

[0092] Remove the guide rod and install the cone member 3. The fixing cylinder 33 of the cone member 3 is inserted into the elastic member 4;

[0093] Step 6: The locking screw passes inward through the locking hole and penetrates the bearing spring 41, and the end is threadedly locked with the central hole 14, driving the cone member 3 to squeeze the bearing spring 41; the locking hole 31 is a stepped hole. When the locking screw 5 is completely fixed, the end is located in the locking hole 31;

[0094] Install the locking screw 5, and the locking screw 5 is inserted into the locking hole 31;

[0095] The cone head 32 of the cone member 3 squeezes the sector block 21 outward until the sector plate abuts against the workpiece 100;

[0096] Step 7: Process the workpiece 100, including processing the arc groove 101 and the mounting hole 102;

[0097] After processing the workpiece 100, remove the locking screw 5, and the elastic member 4 squeezes the cone member 3 outward; so that the petal body 2 is quickly separated from the workpiece 100.

[0098] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0099] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi - process machining fixture for ensuring the roundness of a ring - shaped product, including a workpiece (100), where the workpiece (100) is ring - shaped; the end face of the workpiece (100) is suitable for machining an arc - shaped groove (101) and a mounting hole (102). It is characterized in that It further includes: A base plate (1), on which a cross - shaped track groove (11) is opened; a positioning hole (12) is installed on the base plate (1), a central groove (13) is installed in the middle of the cross - shaped track groove (11), and a central hole (14) is installed in the central groove (13). Petal bodies (2), with multiple groups of petal bodies (2) installed synchronously on the base plate (1) and circumferentially and equally spaced against the inner wall of the workpiece (100). A cone - shaped part (3), in which a locking hole (31) is opened; an elastic part (4) is movably installed in the central groove (13). A locking screw (5), which is inserted into the locking hole (31) and thread - connected to the central hole (14).

2. The multi-process machining fixture for ensuring the roundness of the annular product according to claim 1, characterized in that, The petal body (2) includes a sector - shaped block (21), and a clearance groove (22) is opened on the side of the sector - shaped block (21) facing the workpiece (100). There are multiple groups of clearance grooves (22), and they are arranged in parallel. A connecting strip (23) is installed at the bottom of the sector - shaped block (21), and the connecting strip (23) is connected in the cross - shaped track groove (11).

3. The multi-process machining fixture for ensuring the roundness of a ring-shaped product according to claim 2, characterized in that, The end cross - section of the cross - shaped track groove (11) is in the shape of a dovetail mouth, the bottom of the connecting strip (23) is in the shape of a dovetail strip, and the connecting strip (23) is adapted to the cross - shaped track groove (11). An arc - shaped surface (15) is opened in the middle of the cross - shaped track groove (11). There are multiple groups of arc - shaped surfaces (15), and the circular diameter of the co - circular ones is not less than the groove diameter of the central groove (13).

4. The multi-process machining fixture for ensuring the roundness of a ring-shaped product according to claim 3, characterized in that, The cone - shaped part (3) includes a cone head (32) and a fixed cylinder (33), and the cone head (32) is integrally connected to the fixed cylinder (33); and the diameter of the cone head (32) is greater than the diameter of the fixed cylinder (33). The fixed cylinder (33) is suitable for inserting into the elastic part (4) in the central groove (13), and the elastic part (4) is suitable for sleeving outside the fixed cylinder (33); the elastic part (4) is movably abutted against the end face of the fixed cylinder (33) facing the central hole (14). The cone head (32) and the fixed cylinder (33) are co - axial and a locking hole (31) is opened in the middle.

5. The multi-process machining fixture for ensuring the roundness of the annular product according to claim 4, characterized in that, The elastic part (4) includes a bearing spring (41), the bearing spring (41) is installed in the central groove (13), one end is movably abutted against the fixed cylinder (33), and the other end is movably abutted against the inner wall of the central groove (13).

6. The multi-process machining fixture for ensuring the roundness of a circular product according to claim 4, characterized in that, The elastic part (4) includes an inner ring (42) and an outer ring (43), the inner ring (42) and the outer ring (43) are coaxially arranged, and a closing plate (44) is installed at the end facing away from the cone head (32). A working ring (46) is installed between the inner ring (42) and the outer ring (43). Both the closing plate (44) and the working ring (46) are provided with transition holes (45), and the aperture of the transition hole (45) is larger than the aperture of the central hole (14); an elastic guiding structure is installed at the bottom of the working ring (46), and the working ring (46) is movably abutted against the fixed cylinder (33).

7. The multi-process machining fixture for ensuring the roundness of a ring-shaped product according to claim 4, characterized in that, The elastic guiding structure includes a guiding bar (47). A guiding bar (47) is provided between the inner ring (42) and the outer ring (43). A guiding post (48) is installed between the inner ring (42) and the outer ring (43). Guide grooves (49) are provided on both sides of the guiding post (48), and the guide grooves (49) are adapted to the guiding bar (47); A positioning spring (410) is installed between the guiding post (48) and the closing plate (44); Multiple groups of guiding posts (48) are installed, and a working ring (46) is installed together. The working ring (46) abuts against the fixed cylinder (33).

8. The multi-process machining fixture for ensuring the roundness of a ring-shaped product according to claim 4, characterized in that, When the conical part (3) is installed in the central hole (14) through the locking screw (5), the end face of the conical part (3) away from the central hole (14) does not extend beyond the end face of the petal body (2) facing away from the base plate (1); The thickness of the petal body (2) is not greater than the thickness of the workpiece (100).

9. Method for using a multi-process machining fixture for ensuring the roundness of a ring-shaped product, characterized in that, It includes the following steps: Step 1, position and install the base plate (1), and disassemble and connect it to the workbench by installing positioning bolts in the positioning holes (12); Step 2, insert the connecting strip (23) of the petal body (2) into the lateral cross-track groove (11), and the large-diameter outer side of the sector plate faces the outer side away from the central hole (14); Four groups of sector plates are installed and are installed corresponding to the cross-track groove (11); The small-diameter side plates of the four groups of sector plates abut against each other; Step 3, install the elastic member (4) in the central groove (13); The outer ring of the elastic member (4) is adapted to the inner diameter of the central groove (13); Step 4, install the workpiece (100). The central axis of the workpiece (100) is installed on the central hole (14), and at this time the workpiece (100) is separated from the petal body (2); Step 5, install the conical part (3). The fixed cylinder (33) of the conical part (3) is inserted into the elastic member (4); Step 6, install the locking screw (5). The locking screw (5) is inserted into the locking hole (31) and penetrates through the elastic member (4) inward. The end is thread-locked with the central hole (14), driving the conical part (3) to squeeze the elastic member (4); The locking hole (31) is a stepped hole. When the locking screw (5) is completely fixed, the end is located in the locking hole (31); The conical head (32) of the conical part (3) squeezes the sector block (21) outward until the sector plate (21) abuts against the inside of the workpiece (100); Step 7, process the workpiece (100) including processing an arc groove (101) and a mounting hole (102); Step 8, after processing the workpiece (100), remove the locking screw (5), and the elastic member (4) squeezes the conical part (3) outward; so that the petal body (2) is quickly separated from the workpiece (100).

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