Limiting jig for shaping precision metal part

Abstract

The invention relates to the technical field of metal part machining, and discloses a limiting jig for precise metal part shaping, the limiting jig comprises an operation table and a limiting mechanism, the limiting mechanism is located right above the operation table and comprises two clamping jaws for clamping a metal part, and the two clamping jaws can rotate by 180 degrees; a bearing mechanism is arranged on the operation table, a liftable adjusting plate is arranged at the top of the operation table, and the bearing mechanism comprises two hemispherical shells rotationally connected to the adjusting plate. According to the jig, when a clamping jaw drives a metal part to turn over, an L-shaped supporting table descends to reserve a metal part turning space, and meanwhile, two hemispherical shells can seal the turned-over metal part, so that an air blowing mechanism can blow chippings attached to the surface of the metal part out of a semicircular hole; and surface chippings can be cleaned while the metal piece is turned over, and the machining efficiency of the metal piece can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal parts processing, in particular to a limiting jig for shaping precision metal parts. Background Art

[0002] When manufacturing precision metal parts, it is common to use position-limiting fixtures (also known as clamps). A position-limiting fixture is a device used to secure a workpiece and ensure it remains in a specific position during machining. During the shaping process of precision metal parts, position-limiting fixtures are used to secure the metal part to the machining equipment, ensuring that the workpiece does not move or rotate during machining. Position-limiting fixtures can also be designed into specific shapes to ensure that the metal part remains at a specific angle and orientation during machining. This is particularly important for workpieces that need to be machined in multiple directions.

[0003] At present, during the processing of drilling and grinding on the surface of metal parts, a limiting jig is used to fix the position of the metal parts. After the metal parts are placed on the jig, their bottoms are generally placed on the table of the jig. When the front and back sides of the metal parts need to be processed, the staff needs to operate the jig to release the metal parts after completing the processing on the front side of the metal parts, and then turn the metal parts over and operate the jig for a second limiting fixation, which reduces the efficiency of metal part processing. In addition, metal debris generated by the processing will adhere to the surface of the metal parts after processing, and the staff needs to clean it up separately, which is more troublesome. Summary of the Invention

[0004] The purpose of the present invention is to provide a limiting jig for the shaping of precision metal parts, which is used to solve the technical problems that when using a jig to limit the metal parts, it takes a long time to flip the metal parts during the processing, and the debris generated on the surface of the metal parts needs to be cleaned after processing, which delays the processing efficiency.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a limiting jig for shaping precision metal parts, comprising an operating table and a limiting mechanism, wherein the limiting mechanism is located directly above the operating table and comprises two clamping jaws for clamping the metal part, and the two clamping jaws are capable of rotating 180°;

[0006] The operating table is provided with a carrying mechanism, and the top of the operating table is provided with a liftable adjustment plate. The carrying mechanism comprises two hemispherical shells rotatably connected to the adjustment plate, and the corresponding positions of the inner walls of the two hemispherical shells are provided with L-shaped support platforms for supporting metal parts;

[0007] The operating table is provided with a linkage assembly that can rotate the two hemispherical shells and tighten them into a spherical structure when the adjustment plate is lowered. Semicircular holes are opened on the adjacent sides of the two hemispherical shells, and a blowing mechanism is provided inside the hemispherical shells for blowing debris on the surface of the metal parts toward the semicircular holes when the two hemispherical shells are tightened.

[0008] Preferably, the top of the adjustment plate is fixedly connected to two front-to-back symmetrical support frames, and two left-right symmetrical rotating shafts are rotatably connected between the two support frames through bearings, and the adjacent sides of the two hemispherical shells are respectively fixed to the two rotating shafts.

[0009] Preferably, the linkage assembly includes a longitudinal mounting bracket fixedly connected to one side of the operating table, a cross bar fixedly connected to the top of the mounting bracket, and two symmetrical fixed blocks fixedly connected to the top of the cross bar, both fixed blocks have travel holes along their length directions, and one side of the two hemispherical shells is provided with a columnar slider inserted into the corresponding travel hole.

[0010] Preferably, the blowing mechanism includes a fan arranged on the inner wall of one of the hemispherical shells and a pressure block arranged on the inner wall of the other hemispherical shell. The surface of the fan has a push-type switch. When the two hemispherical shells are closed tightly, the push-type switch can contact and press the push-type switch, and when the push-type switch is pressed, the fan can be turned on to rotate.

[0011] Preferably, the limiting mechanism further includes an arc-shaped bracket, the clamping claw is installed at the bottom of the arc-shaped bracket, and a strip-shaped notch matching the arc-shaped bracket is provided on the sides of the two hemispherical shells that are away from each other.

[0012] Preferably, the inner wall of the hemispherical shell is rotatably connected to the second rotating shaft through a bearing, the L-shaped support platform is fixedly sleeved on the second rotating shaft, and a positioning assembly is provided in the hemispherical shell. The positioning assembly includes a hollow rod fixedly connected to the inner wall of the hemispherical shell and located inside the L-shaped support platform. The top of the hollow rod is connected to a push rod whose top is in contact with the inner wall of the L-shaped support platform, and the hollow rod has a spring inside to support the push rod.

[0013] Preferably, two symmetrical protrusions are formed on the top of the support frame, and one end of each rotating shaft is fixedly connected to a push plate corresponding to the protrusion, so that after the two hemispherical shells are tightened, the push plate can contact the protrusion and cause the rotating shaft to rotate.

[0014] Preferably, two symmetrical dust collecting covers are provided on the top of the adjustment plate. The two dust collecting covers can rotate toward each other to close together when the adjustment plate descends and are used to collect debris discharged from the semicircular holes, and two partitions are provided between the two dust collecting covers.

[0015] Preferably, a mounting rod with a vertical direction and an open front is fixedly inserted on the adjustment plate, the top of the mounting rod is hinged to two connecting rods 1, the bottoms of the two ash covers are fixedly connected to one end of the two connecting rods 1, the inner wall of the mounting rod is slidably connected to two left-right symmetrical sliding plates 1 along its height direction, the surfaces of the two sliding plates 1 are hinged to the corresponding connecting rods 1 with connecting rods 2, and two symmetrical fixing rods located between the adjustment plate and the connecting rod 1 are fixedly connected to the operating table.

[0016] Preferably, a sliding plate 2 is slidably inserted into the top of the mounting rod, and two partitions are hinged on the left and right sides of the top of the sliding plate 2, and the tops of the two partitions extend into two semicircular holes respectively and can support the corresponding L-shaped support platform. Two left-right symmetrical rotating shafts 3 are rotatably connected to the mounting rod through bearings, and gears are fixedly sleeved on the two rotating shafts 3. A row of teeth are provided on both sides of the sliding plate 2 and the side of the two sliding plates 1 facing the sliding plate 2, and the gears are engaged with the surfaces of the sliding plate 2 and the corresponding sliding plate 1 through the cooperation of the teeth.

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] 1. When the fixture drives the metal part to flip through the clamping claws, the L-shaped support platform itself descends to reserve space for the metal part to flip. At the same time, the two hemispherical shells can seal the flipped metal part, so that the blower mechanism can blow out the debris adhering to the surface of the metal part into the semicircular hole, realizing the cleaning of surface debris while the metal part is flipping, which can effectively improve the efficiency of metal part processing.

[0019] 2. After the two ash collecting covers of the fixture are closed to collect the debris, they can be separated as the adjustment plate rises to pour out the collected debris, and the sliding plate 2 will slide upward at the same time, so that the two partitions can extend upward into the semicircular hole to support the L-shaped support platform, so that the L-shaped support platform can provide stable support for the metal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at center A;

[0022] Figure 3 It is another three-dimensional structural schematic diagram of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the carrying mechanism of the present invention;

[0024] Figure 5This is an exploded schematic diagram of the L-shaped support platform structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the two hemispherical shell structures of the present invention in a tightened state;

[0026] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0027] Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0028] Figure 9 For the present invention Figure 6 A schematic side view of the structure;

[0029] Figure 10 For the present invention Figure 9 Schematic diagram of the cross-sectional structure in the middle DD direction;

[0030] Figure 11 For the present invention Figure 9 A magnified schematic diagram of the structure at E in the middle;

[0031] Figure 12 For the present invention Figure 9 A magnified schematic diagram of the structure at F in the middle;

[0032] Figure 13 This is a schematic diagram of the dust collecting cover and partition structure of the present invention;

[0033] Figure 14 For the present invention Figure 13 A magnified schematic diagram of the structure at G in the middle;

[0034] Figure 15 This is a schematic diagram of the disassembly of the hemispherical shell structure of the present invention.

[0035] In the picture:

[0036] 1. Operating table; 11. Adjustment plate; 12. Support frame; 121. Bump; 13. Rotating shaft 1; 14. Mounting frame; 141. Crossbar; 142. Fixing block; 143. Fixing rod;

[0037] 2. Limiting mechanism; 21. Clamping claw; 22. Arc-shaped bracket;

[0038] 3. Carrying mechanism; 31. Hemispherical shell; 311. Semicircular hole; 312. Cylindrical slider; 313. Positioning assembly; 3131. Hollow rod; 3132. Push rod; 3133. Spring; 32. L-shaped support platform; 321. Second rotating shaft; 322. Push plate; 33. Strip notch;

[0039] 4. Blower mechanism; 41. Fan; 42. Push-type switch; 43. Pressure block;

[0040] 5. Ash cover; 51. Mounting rod; 52. Connecting rod 1; 53. Sliding plate 1; 54. Connecting rod 2; 55. Rotating shaft 3; 56. Gear;

[0041] 6. Partition; 61. Sliding plate 2; 62. Protrusion. DETAILED DESCRIPTION

[0042] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0043] Example 1

[0044] See also Figures 1-15 , which is the first embodiment of the present invention, the present invention provides a limiting fixture for the shaping of precision metal parts, including an operating table 1, a limiting mechanism 2, and the limiting mechanism 2 is located directly above the operating table 1. It includes two clamping claws 21 for clamping the metal part, and the two clamping claws 21 can rotate 180°, so that they can drive the metal part to flip over on the front and back, which is convenient for processing. In addition, a carrying mechanism 3 for carrying the metal part is provided on the operating table 1, and the top of the operating table 1 is also provided with a liftable adjustment plate 11. The carrying mechanism 3 includes two hemispherical shells 31 rotatably connected to the adjustment plate 11, and the corresponding positions of the inner walls of the two hemispherical shells 31 are provided with L-shaped support platforms 32 for supporting the metal part, so that the adjustment plate 11 can be lowered when the clamping claws 21 drive the metal part to flip, so that the L-shaped support platform 32 is separated from the metal part to reserve space for the metal part to flip.

[0045] When the adjustment plate 11 descends, the operating table 1 is provided with a linkage component that can rotate the two hemispherical shells 31 and tighten them into a spherical structure when the adjustment plate 11 descends. Semicircular holes 311 are opened on the adjacent sides of the two hemispherical shells 31. When the two hemispherical shells 31 are tightened, the two semicircular holes 311 will form a circular hole, and a blower mechanism 4 is provided in the hemispherical shell 31 for blowing debris on the surface of the metal part toward the semicircular holes 311 when the two hemispherical shells 31 are tightened. In this way, when the clamping claw 21 drives the metal part to flip, the L-shaped support platform 32 itself descends to reserve space for the metal part to flip, and the two hemispherical shells 31 can close the flipped metal part, so that the blower mechanism 4 can blow out debris adhered to the surface of the metal part into the semicircular holes 311, so that the surface debris of the metal part can be cleaned while the metal part is flipped, which can effectively improve the efficiency of metal part processing.

[0046] The specific connection method between the hemispherical shell 31 and the adjustment plate 11 is as follows: two front-to-back symmetrical support frames 12 are fixedly connected to the top of the adjustment plate 11, and two left-to-right symmetrical rotating shafts 13 are rotatably connected between the two support frames 12 through bearings. The adjacent sides of the two hemispherical shells 31 are respectively fixed to the two rotating shafts 13, so that the hemispherical shells 31 can form a rotatable connection at the top of the adjustment plate 11.

[0047] In order to enable the two hemispherical shells 31 to rotate and tighten when the adjustment plate 11 is lowered, the linkage assembly may include a mounting bracket 14 fixedly connected to one side of the operating table 1 and in a longitudinal direction, the top of the mounting bracket 14 is fixedly connected to a cross bar 141, and the top of the cross bar 141 is fixedly connected to two symmetrical fixing blocks 142, both fixing blocks 142 are provided with travel holes along their length directions, and one side of the two hemispherical shells 31 is provided with a columnar slider 312 inserted into the corresponding travel hole. Through such a design, when the adjustment plate 11 is lowered, since the positions of the operating table 1 and the mounting bracket 14 are fixed, the adjustment plate 11 will drive the columnar slider 312 to slide along the travel hole, and drive the two The hemispherical shells 31 rotate upward and toward each other on the adjustment plate 11, so that the two hemispherical shells 31 can close the metal parts. At the same time, the blowing mechanism 4 includes a fan 41 arranged on the inner wall of one of the hemispherical shells 31 and a pressure block 43 arranged on the inner wall of the other hemispherical shell 31. The surface of the fan 41 has a push-type switch 42. When the two hemispherical shells 31 are tightened, the push-type switch 42 can contact and press the push-type switch 42, and when the push-type switch 42 is pressed, the fan 41 can be turned on to rotate, so that after the two hemispherical shells 31 are tightened, the fan 41 can blow air downward from the top, thereby blowing debris adhered to the surface of the metal part to the semicircular hole 311, so as to achieve the purpose of cleaning the debris.

[0048] The limiting mechanism 2 also includes an arc-shaped bracket 22, the clamping claw 21 is installed at the bottom of the arc-shaped bracket 22, and the two hemispherical shells 31 are provided with a strip-shaped notch 33 matching the arc-shaped bracket 22 on the side away from each other, so that after the two hemispherical shells 31 are tightened, the two arc-shaped brackets 22 can be respectively inserted into the corresponding strip-shaped notch 33, ensuring the sealing of the two hemispherical shells 31 after tightening. Such a design will be more reasonable.

[0049] Example 2

[0050] Based on Example 1, please refer to Figures 1-15, which is a second embodiment of the present invention. This embodiment is different from the above embodiment in that it provides a specific connection method between the L-shaped support platform 32 and the hemispherical shell 31. The inner wall of the hemispherical shell 31 is rotatably connected with a second rotating shaft 321 through a bearing. The L-shaped support platform 32 is fixedly sleeved on the second rotating shaft 321, so that the L-shaped support platform 32 can rotate in the hemispherical shell 31. A positioning component 313 is provided in the hemispherical shell 31. The positioning component 313 includes a fixed connection to the hemispherical shell 31. The hollow rod 3131 is located on the inner wall of the L-shaped support platform 32. A push rod 3132 is inserted into the top of the hollow rod 3131, and the top of the push rod 3132 abuts against the inner wall of the L-shaped support platform 32. The hollow rod 3131 contains a spring 3133 that supports the push rod 3132. Since the L-shaped support platform 32 is located on one side of the inner part of the hemispherical shell 31, its edge abuts against the inner wall of the hemispherical shell 31 and cannot rotate inward. The push rod 3132 supports the L-shaped support platform 32 and prevents it from rotating outward on its own.

[0051] At the same time, two symmetrical protrusions 121 are formed on the top of the support frame 12, and one end of each of the two second rotating shafts 321 is fixedly connected to a push plate 322 corresponding to the protrusion 121, so that after the two hemispherical shells 31 are tightened, the push plate 322 can contact the protrusion 121 and rotate the second rotating shaft 321, thereby forming the two L-shaped support platforms 32 as shown in FIG. Figure 10 In the inclined state, a gap is formed between the two L-shaped support platforms 32, so that the wind direction generated by the blower mechanism 4 can enter the gap along the inclined surface of the top of the L-shaped support platform 32 and be discharged outward. Firstly, it can prevent debris from accumulating on the L-shaped support platform 32, and secondly, the direction of wind flow can be concentrated toward the semicircular hole 311. When the L-shaped support platform 32 is tilted, the gap between it and the inner wall of the hemispherical shell 31 will also allow wind to blow debris into the semicircular hole 311 along the inner wall of the hemispherical shell 31, thereby achieving the purpose of removing debris.

[0052] Example 3

[0053] Based on the first and second embodiments, please refer to Figures 1-15, which is a third embodiment of the present invention, which is different from the above embodiment in that: two symmetrical ash collecting covers 5 are provided on the top of the adjusting plate 11, and the two ash collecting covers 5 can rotate towards each other when the adjusting plate 11 is lowered to be tightened to each other and used to collect debris discharged from the semicircular hole 311, and two partitions 6 are provided between the two ash collecting covers 5, and the partitions 6 can fill the gap between the two ash collecting covers 5 and allow the debris to fall into the two partitions 6 and be collected respectively. A mounting rod 51 with a vertical direction and an open front is fixedly inserted on the adjusting plate 11, and two connecting rods 52 are hinged on the top of the mounting rod 51. The bottoms of the two ash collecting covers 5 are respectively fixedly connected to one end of the two connecting rods 52, and the inner wall of the mounting rod 51 is slidably connected along its height direction. The sliding plate 1 53 is symmetrical on the left and right, and the surfaces of the two sliding plates 1 53 are respectively hinged with a connecting rod 2 54 between the corresponding connecting rod 1 52, and the operating table 1 is fixedly connected with two symmetrical fixing rods 143 located between the adjusting plate 11 and the connecting rod 1 52. When the position of the adjusting plate 11 drops, the adjusting plate 11 will drive the mounting rod 51 to drop synchronously, so that the connecting rod 1 52 will contact the fixing rod 143 and rotate upward. In this way, after the two hemispherical shells 31 are tightened, the two connecting rods 1 52 will also drive the two ash receiving covers 5 to close and clamp the partition 6. At this time, the ash receiving covers 5 will be connected to the semicircular hole 311 and can collect debris. When the adjusting plate 11 rises, the two ash receiving covers 5 will rotate in the opposite direction to reset, so that the collected debris can be poured out, which can be seen as Figure 1 Two containers for collecting debris are placed at corresponding positions of the adjustment plate 11 to facilitate the collection and processing of the discharged debris.

[0054] The two L-shaped support platforms 32 are supported by the top rods 3132, and when the metal parts are subjected to downward pressure, the two L-shaped support platforms 32 may rotate, resulting in that the fixture is not stable enough to limit the metal parts. In order to avoid the occurrence of the above problems, it is proposed that the top of the mounting rod 51 is slidably connected with a sliding plate 2 61, and the two partitions 6 are hinged to the left and right sides of the top of the sliding plate 2 61, and the tops of the two partitions 6 extend into the two semicircular holes 311 respectively and can support the corresponding L-shaped support platforms 32. There are two left-right symmetrical rotating shafts 35 55 connected to the mounting rod 51 through bearings. Gears 56 are fixedly sleeved on the two rotating shafts 35. A row of tooth grooves are provided on both sides of the sliding plate 2 61 and the side of the two sliding plates 1 53 facing the sliding plate 2 61, and the gears 56 are engaged with the surfaces of the sliding plate 2 61 and the corresponding sliding plate 1 53 through the matching of the tooth grooves, so that the two When the two ash receiving covers 5 are separated following the rise of the adjustment plate 11, the rotation of the two ash receiving covers 5 will pour out the collected debris, and the connecting rod 2 54 will push the sliding plate 1 53 to slide downward, and the cooperation of the gear 56 can drive the sliding plate 2 61 to slide upward, so that the two partitions 6 can extend upward into the semicircular holes 311 to support the L-shaped support platform 32, so that the L-shaped support platform 32 can play a stable support for the metal parts. It should be noted that a protrusion 62 is formed on the side where the two partitions 6 are away from each other, so that the center of gravity of the two partitions 6 are away from each other. When the two ash receiving covers 5 no longer clamp them, the two partitions 6 will open under the action of gravity and extend into the semicircular holes 311 to support the L-shaped support platform 32, and when the two ash receiving covers 5 are away from each other, the partitions 6 will rotate for a certain distance along with the ash receiving covers 5, avoiding the problem that debris will fall out from between the two ash receiving covers 5 in the early stage of separation.

[0055] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0057] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A position limiting jig for shaping precision metal parts, comprising an operating table (1) and a position limiting mechanism (2), wherein the position limiting mechanism (2) is located directly above the operating table (1), and comprises two clamping jaws (21) for clamping the metal part, and the two clamping jaws (21) can rotate 180 degrees, and is characterized in that: A carrying mechanism (3) is provided on the operating table (1). The top of the operating table (1) is provided with a liftable adjustment plate (11). The carrying mechanism (3) comprises two hemispherical shells (31) rotatably connected to the adjustment plate (11). L-shaped support platforms (32) for supporting metal parts are provided at corresponding positions on the inner walls of the two hemispherical shells (31). The operating table (1) is provided with a linkage assembly capable of rotating and closing the two hemispherical shells (31) into a spherical structure when the adjustment plate (11) is lowered. A semicircular hole (311) is provided on one adjacent side of the two hemispherical shells (31). A blower mechanism (4) is provided in the hemispherical shells (31) for blowing debris on the surface of the metal part toward the semicircular hole (311) when the two hemispherical shells (31) are closed.

2. A position limiting jig for shaping precision metal parts according to claim 1, characterized in that: The top of the adjustment plate (11) is fixedly connected to two front-to-back symmetrical support frames (12), and two left-to-right symmetrical rotating shafts (13) are rotatably connected between the two support frames (12) via bearings. The adjacent sides of the two hemispherical shells (31) are respectively fixed to the two rotating shafts (13).

3. The position limiting fixture for shaping precision metal parts according to claim 2, characterized in that: The linkage assembly comprises a longitudinal mounting frame (14) fixedly connected to one side of an operating table (1); a crossbar (141) is fixedly connected to the top of the mounting frame (14); and two symmetrical fixing blocks (142) are fixedly connected to the top of the crossbar (141); the two fixing blocks (142) are both provided with travel holes along their length directions; and one side of the two hemispherical shells (31) is provided with a columnar slider (312) inserted into the corresponding travel hole.

4. The position limiting fixture for shaping precision metal parts according to claim 1, characterized in that: The blower mechanism (4) comprises a fan (41) arranged on the inner wall of one hemispherical shell (31) and a pressing block (43) arranged on the inner wall of the other hemispherical shell (31). The surface of the fan (41) is provided with a push-type switch (42). When the two hemispherical shells (31) are tightly closed, the push-type switch (42) can contact and press the push-type switch (42). When the push-type switch (42) is pressed, the fan (41) can be turned on to rotate.

5. The position limiting fixture for shaping precision metal parts according to claim 1, characterized in that: The limiting mechanism (2) further comprises an arc-shaped bracket (22), the clamping claw (21) is mounted on the bottom of the arc-shaped bracket (22), and the two hemispherical shells (31) are provided with strip-shaped notches (33) matching the arc-shaped bracket (22) on the sides away from each other.

6. The position limiting fixture for shaping precision metal parts according to claim 2, characterized in that: The inner wall of the hemispherical shell (31) is rotatably connected to a second rotating shaft (321) through a bearing, and the L-shaped support platform (32) is fixedly sleeved on the second rotating shaft (321). A positioning assembly (313) is provided in the hemispherical shell (31). The positioning assembly (313) includes a hollow rod (3131) fixedly connected to the inner wall of the hemispherical shell (31) and located inside the L-shaped support platform (32). The top of the hollow rod (3131) is connected to a push rod (3132) whose top abuts against the inner wall of the L-shaped support platform (32), and a spring (3133) supporting the push rod (3132) is provided in the hollow rod (3131).

7. The position limiting fixture for shaping precision metal parts according to claim 6, characterized in that: Two symmetrical protrusions (121) are formed on the top of the support frame (12), and one end of each of the two second rotating shafts (321) is fixedly connected with a push plate (322) corresponding to the protrusion (121), so that after the two hemispherical shells (31) are tightly closed, the push plate (322) can contact the protrusion (121) and cause the second rotating shaft (321) to rotate.

8. The position limiting fixture for shaping precision metal parts according to claim 1, characterized in that: Two symmetrical dust collecting covers (5) are provided on the top of the adjustment plate (11). The two dust collecting covers (5) can rotate towards each other when the adjustment plate (11) descends to close together and collect debris discharged from the semicircular hole (311). Two partitions (6) are provided between the two dust collecting covers (5).

9. The position limiting fixture for shaping precision metal parts according to claim 8, characterized in that: A mounting rod (51) with a vertical orientation and an opening on the front is fixedly connected to the adjusting plate (11); the top of the mounting rod (51) is hinged with two connecting rods (52); the bottoms of the two ash collecting covers (5) are respectively fixedly connected to one end of the two connecting rods (52); the inner wall of the mounting rod (51) is slidably connected to two left-right symmetrical sliding plates (53) along its height direction; the surfaces of the two sliding plates (53) are respectively hinged with connecting rods (54) corresponding to the connecting rods (52); and the operating table (1) is fixedly connected with two symmetrical fixing rods (143) located between the adjusting plate (11) and the connecting rod (52).

10. The position limiting fixture for shaping precision metal parts according to claim 9, characterized in that: The top of the mounting rod (51) is slidably connected to a sliding plate 2 (61), and two partitions (6) are hinged on the left and right sides of the top of the sliding plate 2 (61), and the tops of the two partitions (6) extend into the two semicircular holes (311) and can support the corresponding L-shaped support platform (32). Two left-right symmetrical rotating shafts (55) are rotatably connected in the mounting rod (51) through bearings, and gears (56) are fixedly sleeved on the two rotating shafts (55). A row of tooth grooves are provided on both sides of the sliding plate 2 (61) and the side of the two sliding plates (53) facing the sliding plate 2 (61), and the gears (56) are engaged on the surfaces of the sliding plate 2 (61) and the corresponding sliding plate (53) through the matching of the tooth grooves.

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