Clamp for flange tapping

Abstract

The utility model discloses a fixture for flange tapping, which comprises a turntable, and a plurality of quick mounting mechanisms which are distributed in a central symmetry manner and are used for mounting and fixing flanges are arranged on the turntable; the supporting frame is located below the rotating disc, and the rotating disc is installed on the supporting frame in a horizontal rotating mode; and a worm gear in coaxial transmission connection with the turntable, a worm meshed with the worm gear and a driving motor in transmission connection with the worm are arranged below the support frame. The fixture with the design has multiple stations, the flange can be replaced without shutdown, and the flange tapping production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe fixture field, especially a flange tapping clamp. BACKGROUND

[0002] Flange is the part of mutual connection between shaft and shaft, is used to the connection between pipe end, also has the flange of use on the import and export of equipment. Its function is mainly convenient for pipe and pipe mutual connection, also can guarantee the leakproofness of connection. There are bolt holes on general flange, and two flanges are tightly connected through bolt. In the pipeline system, like the pipeline of medium such as water, oil, gas, flange connection is very common. For example in chemical plant, various chemical raw material delivery pipeline is mostly connected by flange, which is convenient for installation, disassembly and maintenance of pipeline system.

[0003] The patent with the authorized publication number CN213135341U records a processing device for flange tapping, which needs to stop the work of tapping machine after completing the tapping of flange, then dismounts the tapped flange on the mounting disc, and then installs the new flange to be tapped on the mounting disc for tapping. This working mode is complex in operation, which greatly affects the processing efficiency of flange tapping. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a flange tapping clamp with multiple stations and without stopping machine for changing flange.

[0005] The utility model aims at realizing the following: a flange tapping clamp, including a rotating disc, a plurality of quick mounting mechanisms for mounting and fixing flange are symmetrically arranged on the rotating disc; a support frame, the rotating disc is horizontally rotatably installed on the support frame below the rotating disc; a worm gear is coaxially connected with the rotating disc below the support frame, a worm is engaged with the worm gear, and a driving motor is drivingly connected with the worm.

[0006] Compared with the prior art, the utility model has the beneficial effects that: the clamp provided by the utility model has multiple stations, flange can be changed without stopping machine, and the flange tapping production efficiency is greatly improved; specifically, a plurality of quick mounting mechanisms are arranged to clamp flange in multiple stations, and the driving motor, the worm gear and the worm are used to switch the stations, flange in one station is tapped in the processing area, and the remaining stations can be clamped; in addition, the quick mounting mechanism is convenient to operate, thereby further saving time.

[0007] Further, the quick mounting mechanism comprises a base fixed on the rotating disc, a clamping unit, the clamping unit is several and is centrally symmetrically arranged on the base and is used for expanding the inner ring of the flange, an expanding block, the expanding block is matched with the clamping unit and is used for driving the clamping unit to expand and clamp the flange, a hand wheel arranged at the upper end of the expanding block for facilitating rotation, and a screw rod arranged at the lower end of the expanding block and matched with the base in screw.

[0008] Further, the lower end of the expanding block is an inverted circular truncated cone, the clamping unit comprises a fixed seat fixed on the base, a clamping jaw arranged inside the fixed seat and matched with the base in sliding, an inclined surface arranged at the outer side of the upper end of the clamping jaw and matched with the outer side of the lower end of the expanding block in sliding, and a slide column arranged at the inner side of the clamping jaw and matched with the fixed seat in sliding, wherein a spring is arranged on the slide column and abuts against the fixed seat at one end and abuts against the clamping jaw at the other end.

[0009] Further, anti-skid stripes are arranged on the matching surface between the clamping jaw and the inner ring of the flange.

[0010] Further, a plurality of mark lines corresponding to the through holes of the flange are arranged at the central position of the rotating disc. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a top view structural schematic diagram of the utility model.

[0012] Fig. 2 It is a schematic diagram of the cooperation relationship between the rotating disc and the supporting frame.

[0013] Fig. 3 It is a structural schematic diagram of the quick mounting mechanism.

[0014] Wherein, 1 flange, 2 rotating disc, 2a mark line, 3 supporting frame, 3a worm wheel, 3b worm, 3c driving motor, 4 base, 5 fixed seat, 6 clamping jaw, 6a slide column, 6b spring, 7 expanding block, 7a screw rod, 7b hand wheel. DETAILED DESCRIPTION

[0015] The above and other technical features and advantages of the utility model will be described in more detail below in combination with the drawings.

[0016] In combination with the drawings, Figs. 1-3 As shown in the drawings, a flange tapping clamp comprises a rotating disc 2, a plurality of center-symmetrically distributed quick mounting mechanisms for mounting and fixing the flange are arranged on the rotating disc 2, a supporting frame 3, the rotating disc 2 is horizontally rotatably mounted on the supporting frame 3, a worm wheel 3a coaxially and drivingly connected with the rotating disc 2 is arranged below the supporting frame 3, a worm 3b engaged with the worm wheel 3a is further arranged, and a driving motor 3c drivingly connected with the worm 3b is further arranged.

[0017] The quick mounting mechanism comprises a base 4 fixed on the rotating disc 2, a plurality of clamping units symmetrically arranged on the base 4 and used for expanding the inner ring of the flange, and an expanding block 7 used for driving the clamping units to expand and clamp the flange, the upper end of the expanding block 7 being provided with a hand wheel 7b for facilitating rotation, and the lower end of the expanding block 7 being provided with a threaded rod 7a threadedly matched with the base 4.

[0018] The lower end of the expanding block 7 is an inverted circular table, the clamping unit comprises a fixed seat 5 fixed on the base 4, and a clamping jaw 6 located inside the fixed seat 5 and slidably matched with the base 4, the inner side of the clamping jaw 6 being provided with a slide column 6a slidably matched with the fixed seat 5, the slide column 6a being sleeved with a spring 6b, one end of the spring 6b abutting against the fixed seat 5, and the other end of the spring 6b abutting against the clamping jaw 6, and the inclined surface on the outer side of the upper end of the clamping jaw 6 being slidably matched with the outer side of the lower end of the expanding block 7.

[0019] Anti-skid stripes are arranged on the matching surface between the clamping jaw 6 and the inner ring of the flange. This design can effectively prevent the flange from loosening during machining.

[0020] A plurality of mark lines 2a corresponding to the through holes on the flange are symmetrically arranged at the center of the rotating disc 2. During clamping, the flange can be positioned by means of the mark lines 2a, thereby saving the positioning and hole searching time of the tapping machine.

[0021] During installation of the flange 1, the flange 1 is directly placed on the fixed seat 5, the hand wheel 7b is then rotated to drive the expanding block 7 and the threaded rod 7a to rotate, the expanding block 7 gradually moves downward, the clamping jaw 6 gradually moves outward and opens, and the inner ring of the flange 1 is expanded. Conversely, the threaded rod 7a is gradually loosened by means of the hand wheel 7b, the expanding block 7 moves upward, the clamping jaw 6 gradually converges inward under the action of the spring 6b, the inner ring of the flange 1 is loosened, and the flange 1 can be directly taken off.

[0022] During tapping, one quick mounting mechanism is located in the working area of the tapping machine, and the tapping machine is tapping the flange 1 on the quick mounting mechanism. At the same time, the operator can use this time to exchange the flange 1 on other quick mounting mechanisms. It should be noted that, during clamping of the flange 1, the angle position of the flange 1 can be adjusted by naked eye to make the center of any through hole of the flange 1 as possible as align with the mark line 2a, so that the position of the through hole of the flange 1 is more regular when the flange 1 enters the working area of the tapping machine, and the positioning and hole searching time of the tapping machine is saved.

[0023] The utility model discloses not limited to above embodiment, on the basis of the technical scheme disclosed in the utility model, the technical content disclosed in the utility model is not needed to make some substitution and deformation to some technical features among them according to the creative labor of the person skilled in the art, and these substitutions and deformations are all within the protection scope of the utility model.

Claims

1. A flange tapping clamp, characterized in that: The fixture includes Turntable (2), which is provided with several centrally symmetrically distributed quick-installation mechanisms for installing and fixing flanges; A support frame (3) is located below a turntable (2), and the turntable (2) is mounted on the support frame (3) in a horizontally rotatable manner. A worm wheel (3a) is provided below the support frame (3) and is coaxially connected to the turntable (2). A worm (3b) is also provided that meshes with the worm wheel (3a), and a drive motor (3c) is also provided that is connected to the worm (3b) in a drive. The quick-assembly mechanism includes The base (4) is fixed on the turntable (2); Clamping units, there are several clamping units, and they are centrally symmetrically arranged on the base (4) for tightening the inner ring of the flange; The expansion block (7) cooperates with several clamping units to drive the clamping units to expand and clamp the flange; its upper end is provided with a handwheel (7b) for easy rotation, and its lower end is provided with a screw (7a) that is threadedly engaged with the base (4).

2. The flange tapping clamp according to claim 1, characterized in that: The lower end of the expansion block (7) is an inverted frustum; the clamping unit includes A fixing seat (5) is fixed on a base (4); The gripper (6) is located inside the fixed seat (5) and is slidably engaged with the base (4); the inner side of the gripper (6) is provided with a sliding post (6a) that is slidably engaged with the fixed seat (5), and a spring (6b) is sleeved on the sliding post (6a), one end of which abuts against the fixed seat (5) and the other end abuts against the gripper (6); the inclined surface of the upper outer side of the gripper (6) is slidably engaged with the outer surface of the lower end of the tensioning block (7).

3. A flange tapping clamp according to claim 2, characterized in that: The clamp (6) has anti-slip stripes on the mating surface with the inner ring of the flange.

4. A flange tapping clamp according to any one of claims 1 to 3, characterized in that: The turntable (2) has several centrally symmetrically distributed marking lines (2a) whose positions correspond to the through holes on the flange.

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