A clamping tool for machining thin-walled titanium spiral pipe

Abstract

The utility model relates to the field of thin -walled titanium spiral pipe processing especially relates to a clamping frock for thin -walled titanium spiral pipe processing, one side of support is provided with fixed cylinder, the outside of fixed cylinder is provided with a plurality of finger type block mechanisms through the annular array installation of mounting groove, and the rotation action is realized to the worm drive of fixed cylinder inside installation by finger type block mechanism, in the utility model, the rotation of the plurality of finger type block mechanisms outside the fixed cylinder is driven by the rotation worm to rotate outside, and the pipe fitting inner wall is sleeved on the fixed cylinder is clamped and positioned in multiple points, and the whole processing area of pipe fitting outer wall is reserved, the positioning effect is improved while guaranteeing the processing efficiency, and the damage condition of pipe fitting outer wall is avoided.

Description

Technical Field

[0001] This utility model relates to the field of thin-walled titanium spiral tube processing technology, and in particular to a clamping fixture for processing thin-walled titanium spiral tubes. Background Technology

[0002] Thin-walled titanium alloy spiral tubes have important applications in aerospace, high-end medical and precision instrument fields due to their excellent specific strength, corrosion resistance, biocompatibility and special fluid / heat transfer characteristics.

[0003] In the actual production and processing of such pipe fittings, clamping fixtures are often required to position them to ensure processing stability. Some existing fixtures clamp the pipe fitting surface from the outside. However, due to the characteristics of thin-walled titanium alloy spiral pipes, external clamping may cause deformation and damage to the outer wall of the pipe fitting. Furthermore, external clamping will occupy the processing area of ​​the pipe fitting, requiring repeated clamping, which in turn affects processing efficiency and surface quality. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a clamping fixture for processing thin-walled titanium spiral tubes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A clamping fixture for processing thin-walled titanium spiral tubes includes a support, a fixed cylinder is installed on one side of the support, and multiple finger block mechanisms are installed on the outside of the fixed cylinder through a ring array of mounting slots. The finger block mechanisms are driven to rotate by a worm gear installed inside the fixed cylinder.

[0007] The finger block mechanism includes a composite worm gear block and a clamping block. The middle part of the composite worm gear block is rotatably connected to the inner wall of the mounting groove via a pin, and the bottom of the composite worm gear block is meshed with the worm.

[0008] A clamping block is installed on the top of the composite worm gear block. The bottom end of the clamping block is connected to the limiting hole opened on the top wall of the composite worm gear block through a pair of guide rods. Connecting plates are installed on the outer sides of the clamping block. The connecting plates are attached to the outer wall of the composite worm gear block and are fastened to the composite worm gear block by fasteners.

[0009] In addition, a preferred structure is that a worm gear is rotatably mounted on the middle of the support via a bearing component, one end of the worm gear extends out of the support and is mounted on a rocker arm, and the other end extends into the inside of the fixed cylinder and is rotatably mounted on the inner wall of the fixed cylinder.

[0010] Furthermore, a preferred structure is that the bottom of the composite worm gear block is a semi-worm gear structure, and the upper part is a rectangular structure, with the semi-worm gear structure meshing with the worm.

[0011] In addition, a preferred structure is that a pair of limiting holes are provided on both sides of the upper part of the composite worm gear block. The limiting holes are connected to the guide rod for limiting, and a rubber sleeve is installed on the inner wall of the limiting hole. The rubber sleeve is in extrusion contact with the outer wall of the guide rod.

[0012] Furthermore, a preferred structure is that the upper side of the clamping block has a concave-convex clamping surface.

[0013] In addition, a preferred structure is that connecting plates are symmetrically arranged on both sides of the clamping block, and multiple mounting holes are equally spaced in the middle of the connecting plates. When any mounting hole coincides with the connecting hole on the top of the composite worm gear block, a fastening connection is achieved by fasteners passing through the connecting hole and the mounting hole in sequence.

[0014] The beneficial effects of this utility model are as follows:

[0015] I. In this utility model, the rotating worm gear drives multiple finger-shaped block mechanisms outside the fixed cylinder to rotate and extend outward, thereby clamping and positioning the inner wall of the pipe fitting fitted on the fixed cylinder at multiple points, preserving the entire processing area of ​​the outer wall of the pipe fitting, improving the positioning effect while ensuring processing efficiency, and avoiding damage to the outer wall of the pipe fitting.

[0016] II. In this utility model, the finger block mechanism is composed of a relatively adjustable reset worm gear block and a clamping block mechanism. The clamping block can be adjusted through components such as connecting plates and guide rods, thereby increasing the rotation radius of the clamping block to position pipes with different inner diameters and effectively improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of a clamping fixture for processing thin-walled titanium spiral tubes proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the fixed cylinder proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the finger block mechanism and worm gear mating structure proposed in this utility model;

[0020] Figure 4 Schematic diagram of the finger block mechanism proposed in this utility model Figure 1 ;

[0021] Figure 5 Schematic diagram of the finger block mechanism proposed in this utility model Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the external structure of the composite worm gear block proposed in this utility model.

[0023] In the figure: 1 support, 2 fixed cylinder, 21 mounting groove, 3 finger block mechanism, 31 composite worm gear block, 32 clamping block, 321 concave and convex clamping surface, 322 connecting plate, 4 worm, 5 fastener, 6 mounting hole, 7 connecting hole, 8 limit hole, 81 rubber sleeve. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1-6 A clamping fixture for processing thin-walled titanium spiral tubes includes a support 1, a fixed cylinder 2 installed on one side of the support 1, and multiple finger block mechanisms 3 installed in a ring array on the outside of the fixed cylinder 2 through mounting grooves 21. The finger block mechanisms 3 are driven by a worm gear 4 installed inside the fixed cylinder 2 to achieve rotation, thereby positioning the inner wall of the tube fitting sleeved on the outside of the fixed cylinder 2.

[0026] The finger block mechanism 3 includes a composite worm gear block 31 and a clamping block 32. The middle part of the composite worm gear block 31 is rotatably connected to the inner wall of the mounting groove 21 by a pin, and the bottom of the composite worm gear block 31 is meshed with the worm 4.

[0027] A clamping block 32 is installed on the top of the composite worm gear block 31. The bottom end of the clamping block 32 is connected to the limiting hole 8 opened on the top wall of the composite worm gear block 31 through a pair of guide rods. The clamping block 32 achieves single linear motion through the guide rods and the limiting hole 8.

[0028] Connecting plates 322 are installed on both sides of the clamping block 32. The connecting plates 322 are attached to the outer wall of the composite worm gear block 31 and are fastened to the composite worm gear block 31 by fasteners 5.

[0029] Fastener 5 can be a nut, bolt, or washer, which is a standard configuration in this field and will not be explained further.

[0030] A worm gear 4 is rotatably mounted on the middle of the support 1 via a bearing component. One end of the worm gear 4 extends out of the support 1 and is mounted with a rocker arm. By gripping the rocker arm, the worm gear 4 is rotated.

[0031] The other end of the worm gear 4 extends into the inside of the fixed cylinder 2 and is rotatably mounted on the inner wall of the fixed cylinder 2.

[0032] The bottom of the composite worm gear block 31 is a semi-worm gear structure, and the upper part is a rectangular structure. The semi-worm gear structure is meshed with the worm 4.

[0033] A pair of limiting holes 8 are provided on both sides of the upper part of the composite worm gear block 31. The limiting holes 8 are connected to the guide rod for limiting, and a rubber sleeve 81 is installed on the inner wall of the limiting hole 8. The rubber sleeve 81 is in contact with the outer wall of the guide rod by compression.

[0034] The rubber sleeve 81 provides the guide rod with a certain sliding damping force and friction.

[0035] The upper side of the clamping block 32 is provided with a concave-convex clamping surface 321, which specifically includes a surface composed of multiple concave-convex strips to increase the contact friction with the pipe fitting.

[0036] The clamping block 32 has symmetrical connecting plates 322 on both sides. Multiple mounting holes 6 are equally spaced in the middle of the connecting plates 322. When any mounting hole 6 is coaxially coincident with the connecting hole 7 opened on the top of the composite worm gear block 31, a fastening connection is achieved by fasteners 5 passing through the connecting hole 7 and the mounting hole 6 in sequence.

[0037] In this embodiment, the thin-walled titanium spiral tube to be processed is inserted into the outside of the fixed cylinder 2, and the rocker arm is rotated synchronously to drive the worm 4 to rotate. Under the action of the tooth groove rotation of the worm 4, multiple composite worm wheel blocks 31 connected to the worm 4 in synchronous meshing transmission are driven. Each composite worm wheel block 31 rotates and drives the clamping block 32 on its top to rotate. After the rotation displacement, the clamping block 32 will gradually unfold outward until it contacts the inner wall of the tube fitted on the fixed cylinder 2. As the clamping block 32 continues to unfold outward, the inner wall of the tube will be clamped and stabilized by multiple clamping blocks 32 and their concave and convex clamping surfaces 321. Compared with the traditional tooling that clamps from the outside, this mechanism clamps from the inside and ensures clamping stability and uniformity through multiple clamping points, and can obtain a full processing range on the outside of the tube.

[0038] In practical applications, the fasteners at the bottom of the clamping block 32 can still be disassembled, and the clamping block 32 can be pulled upwards, causing the clamping block 32 to gradually separate from the composite worm gear block 31 at the bottom. The distance between the two increases and the rotation radius of the clamping block 32 is increased, thereby supporting pipes with larger inner diameters.

[0039] After the clamping block 32 is adjusted to the corresponding position, the corresponding mounting holes 6 on the connecting plates 322 on both sides of the clamping block 32 are aligned with the connecting holes 7 on the outer side of the composite worm gear block 31, so that the mounting holes 6 and the connecting holes 7 are coaxially coincident, and fastened by fasteners 5. Specifically, the bolts are inserted into the holes and tightened with nuts. This is easy to understand intuitively and will not be explained further.

[0040] The overall clamping radius of the clamping block 32 can be changed by adjusting the position of the clamping block 32 in order to clamp pipe walls with different inner diameters.

[0041] Therefore, for the inner diameter of the pipe fitting to be processed, the difference in the inner diameter of the pipe fitting should be less than the adjustable range of the clamping block 32. This is easy to understand intuitively and is in line with common sense, so it will not be explained further.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clamping fixture for processing thin-walled titanium spiral tubes, comprising a support (1), characterized in that, A fixed cylinder (2) is installed on one side of the support (1). Multiple finger block mechanisms (3) are installed in a ring array through the mounting groove (21) on the outside of the fixed cylinder (2). The finger block mechanisms (3) are driven by the worm gear (4) installed inside the fixed cylinder (2) to achieve rotation. The finger block mechanism (3) includes a composite worm gear block (31) and a clamping block (32). The middle part of the composite worm gear block (31) is rotatably connected to the inner wall of the mounting groove (21) by a pin, and the bottom of the composite worm gear block (31) is meshed with the worm (4). The top of the composite worm gear block (31) is equipped with a clamping block (32). The bottom end of the clamping block (32) is connected to the limiting hole (8) opened on the top wall of the composite worm gear block (31) through a pair of guide rods. Connecting plates (322) are installed on the outer sides of the clamping block (32). The connecting plates (322) are attached to the outer wall of the composite worm gear block (31) and are fastened to the composite worm gear block (31) by fasteners (5).

2. The clamping fixture for processing thin-walled titanium spiral tubes according to claim 1, characterized in that, The support (1) has a worm gear (4) rotatably mounted on the middle part of the bearing component. One end of the worm gear (4) extends out of the support (1) and is mounted with a rocker arm, while the other end extends into the inside of the fixed cylinder (2) and is rotatably mounted on the inner wall of the fixed cylinder (2).

3. The clamping fixture for processing thin-walled titanium spiral tubes according to claim 1, characterized in that, The bottom of the composite worm gear block (31) is a semi-worm gear structure, and the upper part is a rectangular structure. The semi-worm gear structure is meshed with the worm (4).

4. The clamping fixture for processing thin-walled titanium spiral tubes according to claim 3, characterized in that, The composite worm gear block (31) has a pair of limiting holes (8) on both sides of its upper part. The limiting holes (8) are connected to the guide rod for limiting. A rubber sleeve (81) is installed on the inner wall of the limiting hole (8). The rubber sleeve (81) is in contact with the outer wall of the guide rod by compression.

5. The clamping fixture for processing thin-walled titanium spiral tubes according to claim 1, characterized in that, The upper side of the clamping block (32) is provided with a concave-convex clamping surface (321).

6. The clamping fixture for processing thin-walled titanium spiral tubes according to claim 1, characterized in that, The clamping block (32) is symmetrically provided with connecting plates (322) on both sides. Multiple mounting holes (6) are equally spaced in the middle of the connecting plates (322). When any mounting hole (6) coincides with the connecting hole (7) opened on the top of the composite worm gear block (31), a fastening connection is achieved by fasteners (5) passing through the connecting hole (7) and the mounting hole (6) in sequence.

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