Cylindrical workpiece internal expansion tool

Abstract

The utility model discloses an internal expansion tool for a cylindrical workpiece, which relates to the technical field of machining assistive devices and comprises a base, a plurality of groups of fixing components are vertically arranged on the base, and each group of fixing components comprises a bottom plate, a plurality of limiting blocks, a plurality of first arc-shaped plates, a plurality of second arc-shaped plates and a clamping ring. The multiple limiting blocks are arranged on the upper surface of the bottom plate, a sliding groove is formed in each limiting block, a sliding strip is horizontally and slidably arranged in each sliding groove, and the multiple first arc-shaped plates are arranged at the ends, close to the edge of the bottom plate, of the multiple sliding strips; each fixing assembly can be independently adjusted, the outward moving distance of the first arc-shaped plates in each fixing assembly can be adjusted, a good fixing effect can be achieved even if the cylinder diameters of the cylinder parts are not completely the same, and the applicability of the device is improved by selecting a proper number of fixing assemblies according to the lengths of the cylinder parts.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing aids, and specifically relates to an internal expansion tooling for cylindrical workpieces. Background Art

[0002] When machining cylindrical aviation workpieces, positioning tooling is needed for fixing and limiting. The traditional internal expansion tooling drives multiple fixing parts to synchronously extend outwards through a driving part, so that the ends of the fixing parts abut against the inner wall of the cylindrical workpiece for limiting. However, for cylindrical workpieces with variable diameters (such as hyperbolic cylindrical parts), the fixing effect is poor. In addition, the number of fixing parts cannot be adjusted according to the length of the workpiece, resulting in poor applicability. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an internal expansion tooling for cylindrical workpieces. Each fixing component can be adjusted independently, and the distance that multiple first arc-shaped plates in each fixing component move outwards can be adjusted separately. Even if the diameters of the cylindrical parts are not completely the same, a good fixing effect can be achieved. Select an appropriate number of fixing components according to the length of the cylindrical workpiece to improve the applicability of the device.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: An internal expansion tooling for cylindrical workpieces includes a base. A plurality of groups of fixing components are vertically arranged on the base. Each group of fixing components includes a bottom plate, a plurality of limit blocks, a plurality of first arc-shaped plates, a plurality of second arc-shaped plates and a clamping ring. The plurality of limit blocks are arranged on the upper surface of the bottom plate. A chute is opened in each limit block, and a slide bar is horizontally and slidably arranged in each chute. The plurality of first arc-shaped plates are arranged at one end of the plurality of slide bars close to the edge of the bottom plate. The plurality of second arc-shaped plates are arranged at one end of the plurality of slide bars close to the center of the bottom plate. The outer wall of the clamping ring near the bottom is conical and abuts against the plurality of second arc-shaped plates. The clamping ring is detachably arranged on the bottom plate. A plurality of support cylinders are movably arranged between every two adjacent bottom plates in the vertical direction. The lowermost bottom plate is arranged on the base.

[0005] Preferably, a straight cylinder is arranged on the lowermost bottom plate, and each clamping ring is sleeved on the straight cylinder.

[0006] Preferably, a plurality of clamping blocks are arranged on the bottom plate at positions corresponding to the plurality of support cylinders. A protrusion is arranged on each clamping block, and the protrusion on the clamping block can be embedded into the support cylinder.

[0007] Preferably, a plurality of through holes are opened in the clamping block, and a plurality of bolts are arranged through the plurality of through holes. The plurality of bolts are threadedly connected to the bottom plate.

[0008] The utility model provides an internal expansion tooling for cylindrical workpieces, which has the following beneficial effects:

[0009] 1. Each fixing component of the present utility model can be adjusted independently. The distance that multiple first arc-shaped plates in each fixing component move outwards can be adjusted separately, so that a good fixing effect can be achieved even if the barrel diameters of the barrel parts are not exactly the same. Select an appropriate number of fixing components according to the length of the barrel workpiece to improve the applicability of the device;

[0010] 2. A plurality of mounting holes are provided on the bottom plate of the present utility model. Raised portions are provided on both sides of the clamping block. The clamping block is fixed on the bottom plate by bolts or fixedly. The raised portion on one side of the clamping block is embedded into the mounting hole, and the raised portion on the other side is embedded into the support cylinder. One bottom plate is arranged on the other bottom plate through a plurality of support cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0012] Figure 2 is a three-dimensional sectional view of the present utility model;

[0013] Figure 3 is a three-dimensional schematic diagram of the fixing component, support cylinder and clamping block of the present utility model;

[0014] Figure 4 is a three-dimensional sectional view of the fixing component of the present utility model.

[0015] In the figure: 1, base; 2, straight cylinder; 3, bottom plate; 4, limit block; 5, first arc-shaped plate; 6, second arc-shaped plate; 7, snap ring; 7-1, through hole; 8, mounting hole; 9, support cylinder; 10, clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figures 1-4, the present utility model provides a technical solution: an internal expansion tooling for cylindrical workpieces, including a base 1, on which multiple groups of fixing components are vertically arranged. Each group of fixing components includes a bottom plate 3, multiple limiting blocks 4, multiple first arc-shaped plates 5, multiple second arc-shaped plates 6 and a clamping ring 7. The multiple limiting blocks 4 are arranged on the upper surface of the bottom plate 3. A chute is provided on each limiting block 4, and a slide bar is horizontally slidably arranged in each chute. The multiple first arc-shaped plates 5 are arranged at one end of the multiple slide bars close to the edge of the bottom plate 3, the multiple second arc-shaped plates 6 are arranged at one end of the multiple slide bars close to the center of the bottom plate 3. The outer wall of the clamping ring 7 near the bottom is conical and abuts against the multiple second arc-shaped plates 6. The clamping ring 7 is detachably arranged on the bottom plate 3. Multiple support cylinders 9 are inserted between every two adjacent bottom plates 3 in the vertical direction, and the lowermost bottom plate 3 is arranged on the base 1.

[0018] In this embodiment, the appropriate number of fixing components can be selected according to the length of the cylindrical workpiece. The multiple groups of fixing components are vertically arranged on the base 1. The bottom plates 3 in two adjacent groups of fixing components are movably connected by multiple support cylinders 9. When adjusting the length of the multiple first arc-shaped plates 5 extending outwards in each group of fixing components, by adjusting the height of the clamping ring 7 on the bottom plate 3, the clamping ring 7 drives each second arc-shaped plate 6 to move towards the limiting block 4, the second arc-shaped plate 6 drives the slide bar to move, and the slide bar drives the first arc-shaped plate 5 to move, so that the outer side of the first arc-shaped plate 5 abuts against the inner wall of the cylindrical workpiece.

[0019] As an embodiment of the present utility model, a straight cylinder 2 is arranged on the lowermost bottom plate 3, and each clamping ring 7 is sleeved on the straight cylinder 2.

[0020] In this embodiment, the straight cylinder 2 can prevent the multiple support cylinders 9 from tilting and causing the collapse of the entire device, improving the stability of the entire device.

[0021] As an embodiment of the present utility model, multiple clamping blocks 10 are arranged on the bottom plate 3 corresponding to the positions of the multiple support cylinders 9, and each clamping block 10 is provided with a protrusion. The protrusion on the clamping block 10 can be embedded into the support cylinder 9.

[0022] In this embodiment, multiple mounting holes 8 are provided on the bottom plate 3. Both sides of the clamping block 10 are provided with protrusions. The clamping block 10 is fixed on the bottom plate 3 by bolts or fixedly arranged. The protrusion on one side of the clamping block 10 is embedded into the mounting hole 8, and the protrusion on the other side is embedded into the support cylinder 9. One bottom plate 3 is arranged on another bottom plate 3 through the multiple support cylinders 9.

[0023] As an embodiment of the present utility model, multiple through holes 7-1 are provided on the clamping block 10, and multiple bolts are penetrated through the multiple through holes 7-1. The multiple bolts are threadedly connected with the bottom plate 3.

[0024] In this embodiment, the clamping ring 7 is arranged on the bottom plate 3 through bolts. During the process of tightening the clamping ring 7 with bolts, the clamping ring 7 moves vertically downward. The clamping ring 7 causes multiple first arc-shaped plates 5 to move outward. When the multiple first arc-shaped plates 5 abut against the inner wall of the cylindrical workpiece, the clamping ring 7 stops moving downward, thereby firmly fixing the cylindrical part.

[0025] Persons skilled in the art shall connect all the electrical components in this case to their adapted power supplies through wires, and should select a suitable controller according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of operations among the electrical components in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be given.

[0026] The working principle and usage process of the present utility model: When in use, the bottommost bottom plate 3 is arranged on the base 1, and the straight cylinder 2 is arranged on the bottommost bottom plate 3. The cylindrical workpiece is vertically placed on the base 1 and the bottom plate 3 is located inside the cylindrical part. The clamping ring 7 is fixed on the bottom plate 3 through bolts. During the tightening process, the clamping ring 7 moves vertically downward. Since the outer wall of the clamping ring 7 near the bottom is conical, the outer wall of the clamping ring 7 abuts against multiple second arc-shaped plates 6. The second arc-shaped plates 6 move towards the direction of the limiting block 4. The second arc-shaped plates 6 drive the sliders to move. The limiting block 4 limits the slide bar. The slide bar drives the first arc-shaped plates 5 to move outward, so that the ends of the first arc-shaped plates 5 abut against the inner wall of the cylindrical part. Multiple support cylinders 9 are sleeved on the protrusions of multiple clamping blocks 10, and the protrusions on the multiple clamping blocks 10 on another bottom plate 3 are embedded into the tops of the multiple support cylinders 9. The other fixing components are installed and adjusted in the same way. Since each fixing component can be adjusted independently, the distance that the multiple first arc-shaped plates 5 in each fixing component move outward can be adjusted respectively. Therefore, it can meet the fixation of cylindrical parts with variable diameters. Select an appropriate number of fixing components according to the length of the cylindrical workpiece to improve the applicability of the device.

[0027] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An internal expansion tooling for cylindrical workpieces, including a base (1), characterized in that, On the base (1), multiple groups of fixing components are vertically arranged. Each group of fixing components includes a bottom plate (3), a plurality of limiting blocks (4), a plurality of first arc-shaped plates (5), a plurality of second arc-shaped plates (6), and a clamping ring (7). The plurality of limiting blocks (4) are arranged on the upper surface of the bottom plate (3). A chute is formed in each of the limiting blocks (4), and a slide bar is horizontally and slidably arranged in each chute. The plurality of first arc-shaped plates (5) are arranged at one end of the plurality of slide bars close to the edge of the bottom plate (3), and the plurality of second arc-shaped plates (6) are arranged at one end of the plurality of slide bars close to the center of the bottom plate (3). The outer wall of the clamping ring (7) near the bottom is conical and abuts against the plurality of second arc-shaped plates (6). The clamping ring (7) is detachably arranged on the bottom plate (3). A plurality of support cylinders (9) are movably arranged between every two adjacent bottom plates (3) in the vertical direction. The lowermost bottom plate (3) is arranged on the base (1).

2. The internal expansion tooling for cylindrical workpieces according to claim 1, characterized in that, A straight cylinder (2) is arranged on the lowermost bottom plate (3). Each clamping ring (7) is sleeved on the straight cylinder (2).

3. The internal expansion tooling for cylindrical workpieces according to claim 1, characterized in that, At positions corresponding to the plurality of support cylinders (9) on the bottom plate (3), a plurality of clamping blocks (10) are arranged. A protrusion is arranged on each clamping block (10), and the protrusion on the clamping block (10) can be embedded into the support cylinder (9).

4. The internal expansion tooling for cylindrical workpieces according to claim 3, characterized in that, A plurality of through holes (7-1) are formed in the clamping block (10), and a plurality of bolts are arranged through the plurality of through holes (7-1). The plurality of bolts are threadedly connected to the bottom plate (3).

Images