Flange centering clamp

Abstract

The utility model discloses a flange centering clamp which comprises a base, the base is of a rectangular shell structure with an open upper opening, a stand column is fixedly installed in the middle of an inner cavity of the base, a concentric clamping disc is fixedly installed at the top of the stand column, three radial sliding grooves are evenly formed in the clamping disc along the circumference, and matched sliding blocks are connected in the sliding grooves in a sliding mode. The upper sides of the sliding blocks extend out of the sliding grooves, dovetail grooves are formed in the upper sides of the front ends and the rear ends of the sliding blocks, pressing blocks are clamped in the dovetail grooves, cambered surfaces used for making contact with flanges are arranged on the outer sides of the pressing blocks, a rotatable driving disc is installed on the stand column and located below the clamping disc, and three spiral driving grooves are formed in the driving disc. Vertical pin shafts are fixedly installed on the lower sides of the sliding blocks, the lower ends of the pin shafts are in matched sliding connection with the driving grooves in a one-to-one correspondence mode, the driving disc rotates to drive the three sliding blocks to synchronously move in the radial direction, the flange can be conveniently and rapidly centered and clamped through the clamp, and the machining efficiency can be easily improved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically a flange centering fixture. Background Technology

[0002] Flanges are components used to connect shafts or pipe ends. During drilling, flanges require centering and clamping for easy positioning. A search revealed Chinese utility model patent CN221640176U, which discloses a flange processing fixture, including: a disc; an expansion structure installed around the outer wall of the disc; a linkage structure installed at the center of the disc; and a limit structure installed on the linkage structure. The expansion structure includes: a support plate, a slide groove, limit posts, a slider, and a spring. This utility model relates to the field of flange processing equipment technology. The beneficial effect of this invention is that before clamping the flange, multiple limit posts are moved inward along the slide groove, compressing the springs until the limit posts contact the edge of the slide groove and cannot move further. At this point, the center hole of the flange is aligned with the four limit posts, which are then fitted onto the outer walls of the four limit posts. The limit posts are then released, allowing them to press tightly against the center hole wall of the flange under the push of the springs, thus restricting the movement of the flange and solving the problem of inconvenient center positioning. However, the above solution also has the following shortcomings: when clamping the flange, a large clamping force is required to achieve stable fixation of the flange, which results in a large rotational resistance of gear 8, making operation laborious and inconvenient. Utility Model Content

[0003] The purpose of this invention is to provide a flange centering clamp to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a flange centering clamp, comprising a base, the base being a rectangular shell structure with an open top, a column fixedly installed in the center of the inner cavity of the base, a concentric clamping plate fixedly installed on the top of the column, the clamping plate having three radially evenly arranged grooves along its circumference, a matching slider slidably connected in the grooves, the upper side of the slider extending out of the groove, dovetail grooves provided on the upper sides of the front and rear ends of the slider, a pressure block engaging in the dovetail groove, the outer side of the pressure block having an arc surface for contacting the flange, the column being mounted... Equipped with a rotatable drive disc located below the clamping disc, the drive disc has three helical drive grooves. A vertical pin is fixedly installed on the lower side of the slider, and the lower end of the pin is slidably connected to each drive groove. The rotation of the drive disc drives the three sliders to move radially synchronously. A concentric sleeve is provided on the lower side of the drive disc, and the sleeve is clearance-fitted with the column. A worm gear is fixedly installed on the sleeve. A transversely penetrating worm is installed on the base, and the worm meshes with the worm gear to achieve drive. A handwheel is installed on the outer end of the worm.

[0005] Preferably, the column is provided with an annular flange, and the flange supports the lower end of the sleeve.

[0006] Preferably, the lower end of the base is provided with a flange, and the flange is provided with mounting holes.

[0007] Compared with the prior art, the beneficial effects of this utility model are: when in use, the worm gear is rotated to drive the worm wheel and drive disk to rotate, and the pin shaft slides along the path of the drive groove to drive the three sliders to achieve synchronous radial movement for clamping the flange. This clamp is easy and labor-saving to operate. Each slider is fitted with a pressure block, and the pressure block has an arc surface that contacts the flange, which improves the stability of clamping the flange. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a schematic diagram showing the connection between the clamping disk and the drive disk.

[0010] In the diagram: 1. Base; 2. Column; 3. Worm gear; 4. Worm; 5. Drive plate; 6. Clamping plate; 7. Pin; 8. Slider; 9. Slide groove; 10. Drive groove; 11. Mounting hole; 12. Pressure block. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0012] Please see Figure 1-2 This utility model provides a technical solution: a flange centering clamp, including a base 1, which is a rectangular shell structure with an open top. A column 2 is fixedly installed in the middle of the inner cavity of the base 1. A flange is provided at the lower end of the base 1, and a mounting hole 11 is provided on the flange. A concentric clamping plate 6 is fixedly installed on the top of the column 2. The clamping plate 6 is provided with three radial grooves 9 evenly distributed along its circumference. A matching slider 8 is slidably connected in the grooves 9. The upper side of the slider 8 extends out of the grooves 9. Dovetail grooves are provided on the upper sides of the front and rear ends of the slider 8. A pressure block 12 is engaged in the dovetail groove. The outer side of the pressure block 12 is provided with an arc surface for contacting the flange. The pressure block 12 is provided with various sizes to match flanges of different sizes. The arc surface has a large contact area with the flange, which improves the stability of clamping and prevents extrusion deformation due to localized force concentration.

[0013] A rotatable drive disc 5 is mounted on the column 2, located below the clamping disc 6. The drive disc 5 has three helical drive grooves 10. Vertical pins 7 are fixedly mounted on the lower side of the sliders 8, with their lower ends corresponding to and slidingly connected to the drive grooves 10. Rotation of the drive disc 5 drives the three sliders 8 to move radially in sync. When the three sliders 8 move synchronously towards the center, the flange can be clamped and fixed. A concentric sleeve is located on the lower side of the drive disc 5, with a clearance fit between the sleeve and the column 2. The column 2 has an annular flange that supports the lower end of the sleeve. A worm gear 3 is fixedly mounted on the sleeve, and a transversely penetrating worm 4 is mounted on the base 1. The worm 4 meshes with the worm gear 3 to achieve drive. A handwheel is mounted on the outer end of the worm 4. The worm 4's drive of the worm gear 3 is unidirectional and has a reduction ratio. Therefore, the worm 4 driving the worm gear 3 to rotate can amplify the torque and maintain the rotated state, improving operational convenience.

[0014] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flange centering clamp, comprising a base (1), the base (1) being a rectangular shell structure with an open top, a column (2) fixedly installed in the middle of the inner cavity of the base (1), a concentric clamping plate (6) fixedly installed on the top of the column (2), the clamping plate (6) having three radially spaced grooves (9) evenly arranged along its circumference, wherein a matching slider (8) is slidably connected in the grooves (9), characterized in that: The upper side of the sliding block (8) extends a sliding groove (9), dovetail grooves are arranged on the upper side of the front and rear ends of the sliding block (8), a pressing block (12) is clamped in the dovetail groove, the outer side of the pressing block (12) is provided with an arc surface for contacting the flange, the stand (2) is provided with a rotatable driving disc (5), the driving disc (5) is located below the clamping disc (6), three spiral driving grooves (10) are arranged on the driving disc (5), the lower side of the sliding block (8) is fixedly provided with a vertical pin shaft (7), the lower end of the pin shaft (7) is in one-to-one correspondence with the driving groove (10) and is in sliding connection, the driving disc (5) rotates to drive the three sliding blocks (8) to move radially synchronously, the lower side of the driving disc (5) is provided with a concentric sleeve, the sleeve is in clearance fit with the stand (2), the sleeve is fixedly provided with a worm wheel (3), the base (1) is provided with a transversely penetrating worm (4), the worm (4) is in meshing engagement with the worm wheel (3) to realize driving, and the outer end of the worm (4) is provided with a hand wheel.

2. A flange centering fixture according to claim 1, characterized in that: The stand (2) is provided with an annular flange, and the flange supports the lower end of the sleeve.

3. A flange centering clamp according to claim 2, characterized in that: The lower end of the base (1) is provided with a flange, and the flange is provided with a mounting hole (11).

Images