Adjustable clamping tool for plastic composite pipe

Abstract

The utility model discloses an adjustable clamping tool for a plastic composite pipe, which belongs to the technical field of plastic composite pipe processing and comprises a lower clamping die holder and an upper clamping die holder positioned right above the lower clamping die holder, and grooves are arranged at the top of the lower clamping die holder and the bottom of the upper clamping die holder. The rotatable mounting plates are arranged in the lower clamping die holder and the upper clamping die holder, and the clamping dies with different inner diameter specifications are fixed on the upper surfaces and the lower surfaces of the mounting plates, so that an integrated multi-specification clamping die adaptive structure is constructed, when plastic composite pipes with different inner diameters are processed, the tool does not need to be integrally disassembled, and the working efficiency is greatly improved. The clamping die with the matched inner diameter can be switched only by rotating the mounting plate, the tedious operation process of a traditional tool is omitted, the production interruption frequency caused by die replacement is effectively reduced through the design, labor hour waste caused by frequent die replacement is avoided, and the clamping die is particularly suitable for the continuous machining scene of multi-batch and multi-inner-diameter-specification plastic composite pipes, and the production efficiency is improved. And the operation efficiency and the productivity of the whole production line are fundamentally improved.

Description

Technical Field

[0001] This utility model relates to a clamping fixture, and more particularly to an adjustable clamping fixture for plastic composite pipes, belonging to the field of plastic composite pipe processing technology. Background Technology

[0002] In the processing and manufacturing of plastic composite pipes, internal wall sandblasting is a key process to ensure the cleanliness of the inner wall of the pipe, improve the adhesion of subsequent coatings, and enhance the overall performance of the product. The conventional process is as follows: First, the pipe end of the plastic composite pipe is firmly fixed using clamping fixtures to prevent displacement of the pipe during sandblasting, which would affect the sandblasting accuracy. After the pipe end is fixed, the pipe end and inner wall are pre-cleaned to remove residual oil, dust, and other impurities from the surface. Finally, the sandblasting equipment is started to perform sandblasting on the inner wall of the pipe.

[0003] However, the plastic composite pipe clamping fixtures widely used in the industry currently have significant technical limitations:

[0004] The clamping mold that directly contacts the pipe end adopts a fixed structure design. The inner diameter of the clamping mold is a single specification, which can only be adapted to plastic composite pipes with a specific inner diameter. When processing plastic composite pipes with different inner diameter specifications is required, the operator must first stop the sandblasting operation, disassemble the clamping mold installed on the tooling, and then select and install a new clamping mold that matches the inner diameter of the pipe to be processed. Production can only be resumed after the clamping mold is adjusted and installed in place. Frequent mold changes consume time, increase labor intensity, and seriously reduce production efficiency. In addition, repeated disassembly and assembly can easily produce installation errors, affecting the fitting accuracy between the clamping mold and the pipe end, which may cause the pipe to shift during sandblasting and affect the sandblasting quality.

[0005] To address this issue, an adjustable clamping fixture for plastic composite pipes was designed. Utility Model Content

[0006] The main purpose of this utility model is to provide an adjustable clamping fixture for plastic composite pipes to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] An adjustable clamping fixture for plastic composite pipes includes a lower clamping mold base and an upper clamping mold base located directly above the lower clamping mold base. Grooves are provided on the top of the lower clamping mold base and the bottom of the upper clamping mold base. Rotating shafts are rotatably installed inside both the lower clamping mold base and the upper clamping mold base, and the rotating shafts pass through the grooves.

[0009] Each groove is equipped with a mounting plate, which is fixedly connected to the rotating shaft.

[0010] Clamping molds are installed on both the top and bottom sides of the mounting plate, and the inner diameters of the clamping molds on the two sides of the mounting plate are different.

[0011] Both the lower and upper clamping mold bases are equipped with rotating mechanisms on their sides for adjusting the position of the clamping mold on the mounting plate.

[0012] Preferably, the mounting plate has inserts on both the upper and lower sides along the length direction, the clamping mold has slots that mate with the inserts, and bolt holes are provided on both sides of the clamping mold. Bolts are installed inside the bolt holes, and the ends of the bolts are in contact with the sides of the inserts.

[0013] Preferably, both the insert and the slot are T-shaped, and the length of the insert is the same as the length of the mounting plate.

[0014] Preferably, the rotating mechanism includes a mounting groove, a worm gear, and a worm. The mounting groove is formed on the side of the lower and upper mold clamping bases. The worm gear is rotatably mounted inside the mounting groove and fixed to the end of the rotating shaft. The worm is meshed with the outside of the mounting groove.

[0015] Preferably, the top of the worm extends to the outside of the lower and upper mold holders, and the end of the worm is provided with an adjustment groove.

[0016] Preferably, the ends of the rotating shafts are provided with indicator arrows, and the outer sides of the lower and upper clamping mold bases are provided with positioning lines that cooperate with the indicator arrows.

[0017] Preferably, the inner side of the groove fits against the side of the clamping mold, and the width of the clamping mold is the same as the width of the mounting plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model constructs an integrated multi-specification clamping mold adaptation structure by setting rotatable mounting plates inside both the lower and upper clamping mold bases, and fixing clamping molds of different inner diameters on the upper and lower surfaces of the mounting plates. When processing plastic composite pipes with different inner diameters, there is no need to disassemble the tooling as a whole. Simply rotating the mounting plate can switch to the clamping mold with the appropriate inner diameter, eliminating the cumbersome operation process of traditional tooling. This design effectively reduces the frequency of production interruptions caused by mold changes and avoids the waste of time caused by frequent mold changes. It is especially suitable for continuous processing scenarios of multiple batches and multiple inner diameter specifications of plastic composite pipes, fundamentally improving the operating efficiency and capacity of the entire production line.

[0020] 2. This utility model relies on a rotating mechanism composed of an installation groove, a worm gear, a worm, and an adjustment groove. It fully utilizes the self-locking characteristics of the worm gear and worm meshing to form a highly efficient and stable clamping adjustment scheme. The operator only needs to rotate the worm to drive the worm gear and related components to quickly complete the adjustment of the clamping position. At the same time, the self-locking function of the worm gear can automatically achieve a stable limit after the clamping is adjusted to the correct position, without the need for an additional locking structure. This design not only makes the clamping adjustment operation more convenient and labor-saving, reducing the skill requirements of the operator, but also ensures that the clamping remains stable during operation, avoiding clamping displacement due to external forces or vibrations, and further ensuring the reliability of the plastic composite pipe clamping. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 This is a diagram showing the internal structure of the base of this utility model;

[0023] Figure 3 This is a structural diagram of the mounting plate and clamping mold of this utility model.

[0024] Figure 4 This is a cross-sectional view of the worm gear of this utility model.

[0025] In the diagram: 1. Lower clamping mold base; 2. Upper clamping mold base; 3. Groove; 4. Rotating shaft;

[0026] 5. Rotating mechanism; 501. Mounting slot; 502. Worm gear; 503. Worm; 504. Adjusting slot;

[0027] 6. Mounting plate; 601. Insert block;

[0028] 7. Clamping mold; 701. Slot; 702. Bolt hole. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0030] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Example 1

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes an adjustable clamping fixture for plastic composite pipes, including a lower clamping mold base 1 and an upper clamping mold base 2 located directly above the lower clamping mold base 1. Grooves 3 are provided on the top of the lower clamping mold base 1 and the bottom of the upper clamping mold base 2. A rotating shaft 4 is rotatably installed inside both the lower clamping mold base 1 and the upper clamping mold base 2, and the rotating shaft 4 passes through the groove 3.

[0036] Each groove 3 is equipped with a mounting plate 6, which is fixedly connected to the rotating shaft 4.

[0037] Clamping molds 7 are installed on both the upper and lower sides of the mounting plate 6, and the inner diameters of the clamping molds 7 on both sides of the mounting plate 6 are different.

[0038] Both the lower clamping mold base 1 and the upper clamping mold base 2 are equipped with a rotating mechanism 5 on their sides, which is used to adjust the position of the clamping mold 7 on the mounting plate 6.

[0039] During installation, the lower clamping mold base 1 is fixed in position using bolts, while the upper clamping mold base 2 moves up and down via an external drive structure (such as a hydraulic or pneumatic device). Initially, one set of clamping molds 7 inside the mold base is located inside the groove 3. Before operation, the upper clamping mold base 2 is raised upwards, and the operator places the end of the plastic composite pipe to be processed into the clamping mold 7 at the top of the lower clamping mold base 1. The clamping mold 7 provides initial positioning for the pipe, preventing lateral displacement. The external drive structure drives the upper clamping mold base 2 downwards until the clamping mold 7 in the groove 3 at the bottom of the upper clamping mold base 2 is in contact with the outer wall of the top of the pipe. Downward pressure is then applied, and the lower clamping mold base... The clamping mold 7 on the upper clamping mold base 1 and the upper clamping mold base 2 together form a clamping force on the pipe end. The friction between the clamping mold 7 and the outer wall of the pipe is used to fix the pipe and prevent the pipe from shifting during subsequent sandblasting operations. When it is necessary to process plastic composite pipes with different inner diameters, there is no need to disassemble the existing clamping mold 7. The rotating shaft 4 can be driven to rotate by simply driving the rotating mechanism 5 on the side of the lower clamping mold base 1 and the upper clamping mold base 2. The rotating shaft 4 drives the mounting plate 6 to rotate 180° synchronously, so that the clamping mold 7 with different inner diameters on the other side of the mounting plate 6 rotates to the outer area of ​​the groove 3, completing the rapid switching of the clamping mold 7. Then the above "placement-clamping" process is repeated to achieve the adaptation of pipes of different specifications.

[0040] Example 2

[0041] The solution in Example 1 will be further described below with reference to its specific working method.

[0042] like Figure 3 As shown, in a preferred embodiment, based on the above method, the mounting plate 6 is further provided with insert blocks 601 on both the upper and lower sides along the length direction, and the clamping mold 7 is provided with slots 701 that cooperate with the insert blocks 601. Bolt holes 702 are provided on both sides of the clamping mold 7. Bolts are fitted inside the bolt holes 702, and the ends of the bolts are in contact with the side of the insert blocks 601.

[0043] After the clamping mold 7 is assembled with the insert block 601 of the mounting plate 6 through the slot 701, tighten the bolts. The bolt ends are in close contact with the side of the insert block 601, and the clamping mold 7 is firmly fixed to the mounting plate 6 by friction, preventing the clamping mold 7 from loosening during clamping and sandblasting. If it is necessary to replace the clamping mold 7 with a specific inner diameter, simply loosen the bolts, pull out the old clamping mold 7 along the direction of the insert block 601, insert the new clamping mold 7, and then tighten the bolts again to achieve convenient replacement of the clamping mold 7.

[0044] like Figure 3As shown, in a preferred embodiment, based on the above method, both the insert 601 and the slot 701 are T-shaped, and the length of the insert 601 is the same as the length of the mounting plate 6. The T-shaped structure design can effectively limit the detachment of the clamping mold 7 along the thickness direction of the mounting plate 6, while ensuring the accurate positioning of the clamping mold 7 along the length direction of the mounting plate 6.

[0045] like Figure 2 As shown, in a preferred embodiment, based on the above method, the rotating mechanism 5 further includes a mounting groove 501, a worm gear 502 and a worm 503. The mounting groove 501 is opened on the side of the lower clamping mold base 1 and the upper clamping mold base 2. The worm gear 502 is rotatably mounted inside the mounting groove 501. The worm gear 502 is fixed to the end of the rotating shaft 4. The worm 503 is meshed and mounted on the outside of the mounting groove 501.

[0046] When it is necessary to switch the clamping mold 7, the operator uses a tool to control the rotation of the worm 503. The worm 503 drives the worm wheel 502 to rotate through tooth surface meshing. The worm wheel 502 drives the rotating shaft 4 and the mounting plate 6 to rotate, thereby adjusting the position of the clamping mold 7. Since the worm wheel 502 and worm 503 mechanism has a self-locking characteristic (the worm wheel 502 can only be driven by the worm 503, and vice versa), once the clamping mold 7 is adjusted to the correct position, no additional locking structure is needed. The worm wheel 502 can remain fixed, ensuring that the clamping mold 7 will not shift due to external force or vibration during operation.

[0047] like Figure 1 As shown, in a preferred embodiment, based on the above method, the top end of the worm 503 extends to the outside of the lower clamping mold base 1 and the upper clamping mold base 2, and the end of the worm 503 is provided with an adjustment groove 504. When adjusting the worm 503, the rotation of the worm 503 can be controlled by inserting a hexagonal screwdriver into the adjustment groove 504.

[0048] like Figure 2 As shown, in a preferred embodiment, based on the above method, the ends of the rotating shaft 4 are provided with indicator arrows, and the outer sides of the lower clamping mold base 1 and the upper clamping mold base 2 are provided with positioning lines that cooperate with the indicator arrows. When the rotating worm gear 503 drives the rotating shaft 4 to rotate, the operator can judge the rotation angle of the mounting plate 6 by observing the relative position of the indicator arrows and the positioning lines.

[0049] like Figure 1As shown, in a preferred embodiment, based on the above method, the inner side of the groove 3 is further fitted with the side of the clamping mold 7, and the width of the clamping mold 7 is the same as the width of the mounting plate 6. This design can restrict the lateral movement of the clamping mold 7 in the groove 3, ensure that the clamping mold 7 is always in the center position of the groove 3, further improve the fitting accuracy between the clamping mold 7 and the pipe, and at the same time avoid the clamping mold 7 from lateral deformation due to force during the clamping process, thereby enhancing the overall stability of the tooling.

[0050] Example 3

[0051] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0052] Before operation, adjust the clamping mold 7 according to the inner diameter of the plastic composite pipe to be processed by rotating mechanism 5. Use a tool to insert into the adjustment groove 504 at the end of worm 503. Worm 503 drives worm wheel 502 and rotating shaft 4 to rotate. Rotating shaft 4 drives mounting plate 6 to rotate. Combined with the indicator arrow at the end of rotating shaft 4 and the positioning line on the outside of clamping mold seat, clamping mold 7 with the appropriate inner diameter is accurately switched to the outside of groove 3. The self-locking characteristics of worm wheel 502 and worm 503 mechanism keep clamping mold 7 fixed without additional locking.

[0053] If the existing clamping mold 7 does not have a compatible specification, loosen the bolts in the bolt holes 702 on both sides of the clamping mold 7, pull out the old clamping mold 7 along the T-shaped insert 601 of the mounting plate 6, align the T-shaped slot 701 of the new clamping mold 7 with the insert 601 and insert it, tighten the bolts to fix the clamping mold 7, and complete the replacement and adaptation of the clamping mold 7.

[0054] During operation, the external drive structure lifts the upper clamping mold 2 upwards, placing the end of the plastic composite pipe on the clamping mold 7 at the top of the lower clamping mold 1. The clamping mold 7 provides initial positioning for the pipe and serves as a reference for positioning.

[0055] The upper clamping mold seat 2 is driven to move downward, so that the clamping mold 7 in the groove 3 at the bottom of the upper clamping mold seat 2 fits against the outer wall of the top of the pipe. Pressure is continued to be applied, and the upper and lower clamping molds 7 together form a stable clamping force on the pipe end, using friction to fix the pipe. At this time, the fitting structure between the inner side of the groove 3 and the side of the clamping mold 7, as well as the connection structure between the T-shaped insert 601 and the slot 701, together ensure that the clamping mold 7 fits tightly against the pipe and prevents the pipe from shifting.

[0056] The operator performs preliminary cleaning of the pipe ends and inner walls after fixing, removing oil, dust and other impurities. The stable clamping of the clamping mold 7 provides a reliable positioning basis for the cleaning operation.

[0057] When the sandblasting equipment is started, the sandblasting medium (such as quartz sand or corundum) is sprayed onto the inner wall of the pipe through the spray gun for sandblasting treatment. During this process, the self-locking characteristics of the worm gear 502 and worm 503 mechanism keep the clamping mold 7 in a fixed position. The stable connection between the clamping mold 7 and the mounting plate 6, and the fit and limit of the clamping mold 7 and the groove 3, together ensure that the pipe will not shift or vibrate due to the impact of sandblasting, thus ensuring the accuracy and uniformity of sandblasting.

[0058] After sandblasting a batch of pipes, the upper clamping mold base 2 is lifted and the processed pipes are removed. If the inner diameter of the next batch of pipes is different, the "clamping mold switching" step is repeated (the mounting plate 6 is adjusted by rotating mechanism 5, and precise switching is achieved by combining the indicator arrow and positioning line). The tooling can be quickly adapted without disassembling the clamping mold 7. Then, the new pipes are placed in and the above process is repeated to achieve continuous and efficient processing of multiple specifications of pipes, greatly reducing the time and labor intensity of mold changing.

[0059] The above description is only a further 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 scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. An adjustable clamping fixture for plastic composite pipes, comprising a lower clamping mold base (1) and an upper clamping mold base (2) located directly above the lower clamping mold base (1), characterized in that: The top of the lower clamping mold base (1) and the bottom of the upper clamping mold base (2) are both provided with grooves (3). The lower clamping mold base (1) and the upper clamping mold base (2) are both rotatably mounted with rotating shafts (4), and the rotating shafts (4) pass through the grooves (3). The interior of each groove (3) is provided with a mounting plate (6), which is fixedly connected to the rotating shaft (4); Clamping molds (7) are installed on both the upper and lower sides of the mounting plate (6), and the inner diameters of the clamping molds (7) on both sides of the mounting plate (6) are different. The sides of both the lower clamping mold base (1) and the upper clamping mold base (2) are provided with a rotating mechanism (5) for adjusting the position of the clamping mold (7) on the mounting plate (6).

2. The adjustable clamping fixture for plastic composite pipes according to claim 1, characterized in that: The mounting plate (6) has inserts (601) on both the upper and lower sides along the length direction. The clamping mold (7) has slots (701) that mate with the inserts (601). The clamping mold (7) has bolt holes (702) on both sides. Bolts are installed inside the bolt holes (702), and the ends of the bolts are in contact with the sides of the inserts (601).

3. The adjustable clamping fixture for plastic composite pipes according to claim 2, characterized in that: Both the insert (601) and the slot (701) are T-shaped, and the length of the insert (601) is the same as the length of the mounting plate (6).

4. The adjustable clamping fixture for plastic composite pipes according to claim 1, characterized in that: The rotating mechanism (5) includes a mounting groove (501), a worm gear (502) and a worm (503). The mounting groove (501) is opened on the side of the lower clamping mold base (1) and the upper clamping mold base (2). The worm gear (502) is rotatably mounted inside the mounting groove (501). The worm gear (502) is fixed to the end of the rotating shaft (4). The worm (503) is meshed on the outside of the mounting groove (501).

5. The adjustable clamping fixture for plastic composite pipes according to claim 4, characterized in that: The top end of the worm (503) extends to the outside of the lower clamping mold base (1) and the upper clamping mold base (2), and the end of the worm (503) is provided with an adjustment groove (504).

6. The adjustable clamping fixture for plastic composite pipes according to claim 1, characterized in that: The ends of the rotating shaft (4) are all provided with indicator arrows, and the outer sides of the lower clamping mold base (1) and the upper clamping mold base (2) are provided with positioning lines that cooperate with the indicator arrows.

7. The adjustable clamping fixture for plastic composite pipes according to claim 1, characterized in that: The inner side of the groove (3) fits against the side of the clamping mold (7), and the width of the clamping mold (7) is the same as the width of the mounting plate (6).

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