Indexing clamp for precisely boring equally-divided holes of part

Abstract

The utility model discloses an indexing fixture for precisely boring equal-division holes of parts, which comprises a turntable, a body shell is mounted on the turntable, and a distance-adjustable clamping plate mechanism and a positioner are mounted on the body shell; a main shaft is installed in the center of the rotary disc, after the main shaft penetrates through the body shell, an indexing plate is installed at the end of the main shaft, and one side of the indexing plate and the positioner are clamped and positioned. An indexing plate and a positioner are used, so that the indexing precision is improved; the dense bead sleeves are adopted to achieve gapless fit between tool parts, and rotation is flexible. And the position accuracy of the equally-divided holes in the part is also improved. According to the number of the equally-divided holes in the parts, the corresponding indexing plates with the same tooth number can be replaced, and one set of clamp can adapt to precise boring of the equally-divided holes with different numbers in different parts.

Description

Technical Field

[0001] This utility model relates to the field of parts processing fixtures, and in particular to an indexing fixture for precision boring of parts with equal-divided holes. Background Technology

[0002] As the level of equipment manufacturing continues to improve, the precision of the equally spaced holes on some parts directly affects the performance of the equipment, such as the transmission accuracy and noise level. Without a high-precision vertical machining center, this fixture can be used on a vertical boring machine to achieve precision boring of equally spaced holes on a small batch of parts. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, the purpose of this utility model is to provide an indexing fixture for precision boring of parts with equal-divided holes.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] An indexing fixture for precision boring of equally spaced holes in parts includes a turntable, a housing mounted on the turntable, and an adjustable clamping plate mechanism and a positioner mounted on the housing. A spindle is mounted at the center of the turntable, and after passing through the housing, an indexing plate is mounted at the end of the spindle. One side of the indexing plate engages with the positioner for positioning.

[0006] A transition sleeve is installed between the housing and the main shaft. A retaining ring, a ball bearing, and a thrust ball bearing are sequentially installed inside the transition sleeve. The thrust ball bearing is locked onto the main shaft by a lock nut.

[0007] The clamping mechanism includes a lower clamping plate and an upper clamping plate mounted on the shell. The lower clamping plate and the upper clamping plate are connected by a first cylindrical pin. Adjustment mechanisms for adjusting the distance between the lower clamping plate and the upper clamping plate are respectively mounted on the lower clamping plate and the upper clamping plate.

[0008] The main shaft is fitted with a flat key and a wedge in the middle. One side of the wedge is locked by a first round nut. The lower clamping plate and the upper clamping plate are fitted onto the wedge from the side of the body shell.

[0009] The adjustment mechanism includes: a lower adjustment structure that is adjusted and pressed against the lower clamping plate, and / or an upper adjustment structure that is adjusted and pressed against the upper clamping plate; wherein...

[0010] The lower adjustment structure includes: a spring sleeve installed on one end of the inner side of the body shell, a spring and a first screw installed inside the spring sleeve, the first screw being tightened inside the spring sleeve by a nut, and the top end of the first screw being pressed against the lower clamping plate;

[0011] The upper adjustment structure includes: a plate rod shaft installed at the other end of the body shell, the end of the plate rod shaft being pressed against the upper clamping plate, the other end of the plate rod shaft being equipped with a first flange and a first tapered pin, and the end of the plate rod shaft being equipped with a positioning handle seat, a handle rod, and a handle ball for adjustment.

[0012] A second compression spring is installed between the lower clamping plate and the upper clamping plate.

[0013] The spindle end is equipped with a semi-circular key and an indexing plate, and one side of the indexing plate is locked by a second round nut.

[0014] The positioner is fitted with a first compression spring and a second flange, and a star-shaped handle is fitted on the positioner. A second conical pin is installed on the star-shaped handle. A third cylindrical pin for controlling the direction of the positioner's pawl is installed at the end of the positioner. The third cylindrical pin is inserted into the edge groove of the indexing plate.

[0015] A cover plate is installed at the bottom of the shell; an indicator plate is installed at the top of the shell.

[0016] A handle is mounted on the turntable.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention provides an indexing fixture for precision boring of equally spaced holes in parts. It employs an indexing plate and a locator to improve indexing accuracy; a close-fitting ball bushing achieves a clearance-free fit between the tooling parts and allows for flexible rotation. It also improves the positional accuracy of the equally spaced holes on the parts. Depending on the number of equally spaced holes on the part, an indexing plate with the same number of teeth can be replaced, allowing one fixture to accommodate precision boring of different numbers of equally spaced holes on different parts.

[0019] When using the indexing fixture, the fixture is installed on the table of the vertical boring machine. The protective shaft is removed, and the center of the fixture is aligned with the rotation center of the boring machine spindle. The workpiece is placed on the turntable, and the workpiece is aligned with the rotation center of the fixture. The workpiece is then processed. Compared with existing devices, the locating pins used in the existing tooling fixture indexing mechanism are cylindrical or conical. This structure has low indexing accuracy and cannot meet the high-precision requirements for the equally spaced holes on the workpiece. Moreover, it is used on a vertical boring machine. The locating pins used in this utility model indexing fixture have a unique design that can meet the high-precision requirements. Furthermore, the indexing fixture has a simple structural design, and the rotating part adopts a close-bead sleeve structure, allowing for flexible tooling rotation and a clearance-free fit, which improves the positional accuracy of the equally spaced holes. Attached Figure Description

[0020] Figure 1 This utility model relates to a three-dimensional indexing fixture for precision boring of parts with equally spaced holes. Figure 1 ;

[0021] Figure 2 This utility model relates to a three-dimensional indexing fixture for precision boring of parts with equally spaced holes. Figure 2 ;

[0022] Figure 3 This is the main view of the indexing fixture for precision boring of equally spaced holes in parts according to this utility model;

[0023] Figure 4 This is a left view of the indexing fixture for precision boring of equally spaced holes in parts according to this utility model;

[0024] Figure 5 This is a cross-sectional view of the indexing fixture for precision boring of parts.

[0025] In the diagram, 1—cover plate; 2—second washer; 3—indexing plate; 4—wedge; 5—indicator plate; 6—locking nut; 7—transition sleeve; 8—bead sleeve; 9—retaining ring; 10—body; 11—turntable; 12

[0026] 13—Main shaft; 14—Protective shaft; 15—Plug; 16—Spring; 17—Spring sleeve; 18—First screw; 19—Lower clamp; 20—Upper clamp; 21—Plate rod shaft; 22—First flange; 23—Second flange; 24—Positioner; 28—Second round nut; 29—Half-circular key; 30—Flat key; 31—First round nut; 32

[0027] —Fixing screw; 33—Thrust ball bearing; 34—Steel ball; 35—Third cylindrical pin; 36—Fourth screw; 37—Third screw; 38—Nut; 39—First cross-groove third screw pan head screw; 40—Handle ball; 41—Handle lever; 42—First tapered pin; 43—Positioning handle seat; 44—Second screw; 45—Third cylindrical pin; 46—Second cylindrical pin; 47—Second tapered pin; —48—Star handle; 49—First compression spring; 50—Fifth screw; 51—First cylindrical pin; 52—Handle; 53—Third tapered pin; 54—Eye bolt; 55—Second cross-groove pan head screw; 56—First washer; 57—Second compression spring. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0029] like Figure 1-5As shown, this utility model provides an indexing fixture for precision boring of equally spaced holes in parts, including a turntable 11, a housing 10 mounted on the turntable 11, and an adjustable clamping plate mechanism and a positioner 24 mounted on the housing 10; a spindle 12 is mounted at the center of the turntable 11, and after the spindle 12 passes through the housing 10, an indexing plate 3 is mounted at the end of the spindle 12, and one side of the indexing plate 3 engages with the positioner 24 for positioning.

[0030] Preferably, a transition sleeve 7 is installed between the housing 10 and the main shaft 12. A retaining ring 9, a ball bushing 8, and a thrust ball bearing 33 are sequentially installed inside the transition sleeve 7. The thrust ball bearing 33 is locked onto the main shaft 12 by a locking nut 6, and a fixing screw 32 is installed on the thrust ball bearing 33. Steel balls 34 are disposed inside the ball bushing 8.

[0031] Specifically, the clamping mechanism includes a lower clamping plate 18 and an upper clamping plate 19 mounted on the housing 10. A second compression spring 57 is installed between the lower clamping plate 18 and the upper clamping plate 19. The lower clamping plate 18 and the upper clamping plate 19 are connected by a first cylindrical pin 51. Adjustment mechanisms for adjusting the distance between the lower clamping plate 18 and the upper clamping plate 19 are respectively installed on the lower clamping plate 18 and the upper clamping plate 19. Further, a flat key 30 and a wedge 4 are fitted in the middle of the main shaft 12. One side of the wedge 4 is locked by a first round nut 31. The lower clamping plate 18 and the upper clamping plate 19 are fitted onto the wedge 4 from the side of the housing 10.

[0032] The adjustment mechanism described in this utility model includes:

[0033] A lower adjusting structure that is adjusted and pressed against the lower clamping plate 18, and / or an upper adjusting structure that is adjusted and pressed against the upper clamping plate 19; wherein,

[0034] The lower adjustment structure includes: a spring sleeve 16 installed on one end of the inner side of the body shell 10, a spring 15 and a first screw 17 installed inside the spring sleeve 16, the first screw 17 being pressed into the spring sleeve 16 by a nut 38, a first washer 56 being installed on the nut 38, and the top end of the first screw 17 being pressed against the lower clamping plate 18; the other end of the body shell 10 is blocked with a plug 14.

[0035] The upper adjustment structure includes: a plate rod shaft 21 installed at the other end of the housing 10; the end of the plate rod shaft 21 is pressed against the upper clamping plate 19; the other end of the plate rod shaft 21 is equipped with a first flange 22 and a first tapered pin 42; the first flange 22 is fixedly installed on the housing 10 by a second screw 44; and the end of the plate rod shaft 21 is equipped with a positioning handle seat 43, a handle rod 41, and a handle ball 40 for adjustment. When the plate rod shaft 21 is tightened against the upper clamping plate 19, the turntable 11 cannot rotate. When the plate rod shaft 21 is loosened, the turntable 11 can rotate freely.

[0036] Additionally, a semi-circular key 29 and an indexing plate 3 are installed at the end of the main shaft 12. One side of the indexing plate 3 is locked by a second round nut 28 and a second washer 2. A compression spring 49 and a second flange 23 are fitted onto the positioner 24. The second flange 23 is installed on the housing 10 by a third screw 50. A star-shaped handle 48 is fitted onto the positioner 24, and a second tapered pin 47 is installed on the star-shaped handle 48. A third cylindrical pin 45 for controlling the direction of the pawl of the positioner 24 is installed at the end of the positioner 24. The third cylindrical pin 45 is inserted into the edge groove of the indexing plate 3. The second flange 23 is installed on the outside of the housing 10 and fixed with a fifth screw 50 and a second cylindrical pin 46 to ensure that the positioner 24 can be flexibly inserted into the indexing plate 3.

[0037] More preferably, a cover plate 1 is installed below the body shell 10; an indicator plate 5 is installed above the body shell 10. The rotation position of the turntable can be observed. A handle 52 is installed on the turntable 11.

[0038] The installation and operation process of this utility model are as follows:

[0039] Installation process:

[0040] After the main shaft 12 is fitted into the turntable 11, it is fixed to the third cylindrical pin 35 by the third screw 37. A protective shaft 13 is installed on the main shaft 12 by the fourth screw 36. After the main shaft 12 is fitted into the turntable 11, it is fixed to the third cylindrical pin 35 by the third screw 37. The retaining ring 9 and the ball bushing 8 are installed into the main shaft 12, and the thrust ball bearing 33 is installed into the main shaft 12 and locked with the lock nut 6. After the main shaft 12 is fitted into the flat key 30, it is fitted into the wedge 4 and locked with the first round nut 31. The transition sleeve 7 is installed into the housing 10, and the main shaft 12 assembly is installed into the housing 10 together. The lower clamping plate 18 and the upper clamping plate 19 are connected by the first cylindrical pin 51 and then fitted onto the wedge 4 from the side of the housing 10. A spring sleeve 16, a spring 15, a first washer 56, a first screw 17, and a nut 38 are installed on one end of the inner side of the housing 10. This is used to adjust the lower clamping plate 18. A compression spring 57 is installed between the lower clamping plate 18 and the upper clamping plate 19. The other end of the body shell 10 is plugged with a plug 14. A flange 22 is installed on one end of the outer side of the body shell 10 and tightened with a second screw 44. The positioning handle seat 43, handle rod 41, handle ball 40, first tapered pin 42 and plate rod shaft 21 are assembled together, and then the first flange 22 is screwed in to adjust the upper clamping plate 19. When the plate rod shaft 21 supports the upper clamping plate 19, the turntable 11 cannot rotate. When the plate rod shaft 21 is loosened, the turntable 11 can rotate freely.

[0041] A semi-circular key 29, an indexing plate 3, and a second washer 2 are installed on the main shaft 12 from the lower end of the housing 10 and locked with a second round nut 28. A compression spring 49 and a second flange 23 are fitted onto the locator 24, and a star-shaped handle 48 is fitted onto the locator 24 and fixed with a second tapered pin 47. A third cylindrical pin 45 is installed into the locator 24 to control the direction of the locator 24's pawl. A second flange 23 is installed on the outside of the housing 10 and fixed with a fifth screw 50 and a cylindrical pin 46 to ensure that the locator 24 can be flexibly inserted into the indexing plate 3. After the internal parts of the housing 10 are assembled, a cover plate 1 is installed at the bottom of the housing 10 and fixed with a first cross-slot pan head screw 39. An indicator plate 5 is installed at the top of the housing 10 and fixed with a second cross-slot pan head screw 55 and a third tapered pin 53. A handle 52 is installed on the turntable 11, and a lifting eye screw 54 for handling and lifting is installed on the housing 10.

[0042] When using an indexing fixture, install the fixture on the table of the vertical boring machine, align the fixture center with the rotation center of the boring machine spindle, and secure the fixture with bolts through the T-slots on the table. Place the workpiece on the turntable, align the workpiece with the rotation center of the fixture, and secure the workpiece with bolts through the T-slots on the turntable 11. Insert the locator 24 into the indexing plate 3, and tighten the plate rod shaft 21 against the upper clamping plate 19 to begin machining the dividing holes on the workpiece. After machining one dividing hole, move the handle ball 40 to loosen the plate rod shaft 21 against the upper clamping plate 19, pull the star handle 48 to remove the locator 24 from the indexing plate 3, observe the indicator plate 5, and rotate the turntable 11 to the position of the next dividing hole using the handle 52. Loosen the star handle 48 to insert the locator 24 into the toothed groove of the indexing plate 3, and rotate the handle ball 40 to tighten the plate rod shaft against the upper clamping plate 19. The turntable 11 should not rotate, and machining of the dividing holes begins. Repeat this process. After the indexing fixture is used, the protective shaft 13 is inserted into the turntable 11 and fixed with the fourth screw 36.

[0043] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. An indexing fixture for precision boring of equally spaced holes in parts, characterized in that, Includes a turntable (11), on which a housing (10) is mounted, and on which a clamping mechanism and a locator (24) with adjustable distance are mounted; a main shaft (12) is mounted at the center of the turntable (11), and after the main shaft (12) passes through the housing (10), an indexing plate (3) is mounted at the end of the main shaft (12), and one side of the indexing plate (3) engages with the locator (24) for positioning.

2. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1, characterized in that, A transition sleeve (7) is installed between the housing (10) and the main shaft (12). A retaining ring (9), a ball bushing (8), and a thrust ball bearing (33) are installed in sequence inside the transition sleeve (7). The thrust ball bearing (33) is locked onto the main shaft (12) by a locking nut (6).

3. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1 or 2, characterized in that, The clamping mechanism includes a lower clamping plate (18) and an upper clamping plate (19) mounted on the shell (10). The lower clamping plate (18) and the upper clamping plate (19) are connected by a first cylindrical pin (51). The lower clamping plate (18) and the upper clamping plate (19) are respectively equipped with adjustment mechanisms for adjusting the distance between the lower clamping plate (18) and the upper clamping plate (19).

4. The indexing fixture for precision boring of equally spaced holes in parts according to claim 3, characterized in that, The main shaft (12) is fitted with a flat key (30) and a wedge (4) in the middle. One side of the wedge (4) is locked by a first round nut (31). The lower clamping plate (18) and the upper clamping plate (19) are fitted onto the wedge (4) from the side of the shell (10).

5. The indexing fixture for precision boring of equally spaced holes in parts according to claim 4, characterized in that, The adjustment mechanism includes: a lower adjustment structure that is adjusted and pressed against the lower clamping plate (18), and / or an upper adjustment structure that is adjusted and pressed against the upper clamping plate (19); wherein, The lower adjustment structure includes: a spring sleeve (16) installed on one end of the inner side of the body shell (10), a spring (15) and a first screw (17) installed inside the spring sleeve (16), the first screw (17) being pressed and installed inside the spring sleeve (16) by a nut (38), and the top end of the first screw (17) being pressed against the lower clamping plate (18); The upper adjustment structure includes: a plate rod shaft (21) installed at the other end of the body shell (10), the end of the plate rod shaft (21) being pressed against the upper clamping plate (19), the other end of the plate rod shaft (21) being equipped with a first flange (22) and a first tapered pin (42), and the end of the plate rod shaft (21) being equipped with a positioning handle seat (43), a handle rod (41), and a handle ball (40) for adjustment.

6. The indexing fixture for precision boring of equally spaced holes in parts according to claim 4 or 5, characterized in that, A second compression spring (57) is installed between the lower clamping plate (18) and the upper clamping plate (19).

7. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1, characterized in that, The end of the spindle (12) is equipped with a semi-circular key (29) and an indexing plate (3), and one side of the indexing plate (3) is locked by a second round nut (28).

8. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1, characterized in that, The positioner (24) is fitted with a first compression spring (49) and a second flange (23). The positioner (24) is fitted with a star handle (48), and a second conical pin (47) is installed on the star handle (48). A third cylindrical pin (45) for controlling the direction of the pawl of the positioner (24) is installed at the end of the positioner (24), and the third cylindrical pin (45) is inserted into the edge groove of the indexing plate (3).

9. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1, characterized in that, A cover plate (1) is installed below the body shell (10); an indicator plate (5) is installed above the body shell (10).

10. The indexing fixture for precision boring of equally spaced holes in parts according to claim 1, characterized in that, A handle (52) is mounted on the turntable (11).

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