Positioning clamp for soft thin pipe fitting

Abstract

The invention relates to a positioning fixture for a soft thin pipe fitting, which comprises a base arranged on an external rack; the bottom air expansion shaft is vertically arranged on the base, and the bottom air expansion shaft is used for being arranged at the lower end of a workpiece in a penetrating mode; the top positioning seat is movably arranged on an external rack, so that the top positioning seat moves in the axial direction or the radial direction of the workpiece; the upper end of the top mounting rod is connected with the top positioning seat, and the lower end penetrates through the inner side of the workpiece; the bearing disc is detachably connected to the lower end of the top mounting rod; the top mounting rod is sleeved with the protection blocks in a stacked mode, and the outer walls of the peripheral sides of the protection blocks are used for abutting against the inner walls of the workpieces; and the block driving assembly is connected with the plurality of protection blocks and is used for separating two adjacent protection blocks at different positions. The flexible thin pipe fitting clamping device has the effect that drilling, cutting and other penetrating treatment can be conducted on the flexible thin pipe fitting while the flexible thin pipe fitting is stably clamped.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing, and in particular to a positioning fixture for soft thin pipes. Background Art

[0002] With the acceleration of industrialization, especially the rise of precision manufacturing and automated production, traditional manual or semi-mechanized processing methods can no longer meet the high standards of modern industry for part dimensional accuracy, surface quality and production efficiency. As a key device connecting machine tools and workpieces, the main function of the fixture is to stably and accurately position and clamp the workpiece to ensure that the workpiece will not be displaced or deformed during the machining process, thereby ensuring machining quality and safety.

[0003] In the related art, soft and thin pipes cannot be clamped by external clamping methods such as three-jaw chucks due to material and size reasons, and usually pneumatic shafts are used to achieve clamping and positioning.

[0004] With regard to the above-mentioned related technologies, there is a defect that when the pneumatic shaft is used to clamp and position the pipe fitting, it is impossible to perform penetration processing such as drilling and cutting on the pipe fitting. Summary of the invention

[0005] In order to stably clamp the soft and thin pipe fittings while performing penetration processing such as drilling and cutting on the soft and thin pipe fittings, the present application provides a positioning fixture for the soft and thin pipe fittings.

[0006] The present application provides a positioning fixture for a soft thin pipe fitting using the following technical solution: A positioning fixture for a soft thin pipe, comprising: A base for being mounted on an external frame; A bottom air shaft is vertically arranged on the base, and the bottom air shaft is used to penetrate the lower end of the workpiece; A top positioning seat, which is used to be movably arranged on the external frame so that the top positioning seat moves along the axial direction or radial direction of the workpiece; A top mounting rod, the upper end of which is connected to the top positioning seat, and the lower end of which is used to penetrate the inner side of the workpiece; A support tray detachably connected to the lower end of the top mounting rod; A protection block is stacked and sleeved on the top mounting rod, and the peripheral outer wall of the protection block is used to abut against the inner wall of the workpiece; The block driving component is connected to the plurality of protection blocks and is used to separate two adjacent protection blocks at different positions.

[0007] By adopting the above technical scheme, when clamping, the workpiece is first sleeved on the bottom inflatable shaft, then the bottom inflatable shaft is expanded, and then a predetermined number of protection blocks are sleeved on the top mounting rod, and finally the top mounting part and the protection blocks are inserted into the inner side of the workpiece until the support tray abuts against the upper end of the bottom inflatable shaft. In this design method, when performing surface treatment, the workpiece can be supported from the inner side of the workpiece with the help of the bottom inflatable shaft and the protection blocks. Therefore, while keeping the workpiece not easily deformed, only different numbers of protection blocks are needed to adapt to workpieces of different lengths. When performing through-processing, the two adjacent protection blocks at different positions can be separated by the block driving assembly. Then, while avoiding the tool, there are protection blocks above and below the processing position on the workpiece, so the workpiece can still be protected. In summary, the workpiece can be stably clamped and protected from deformation while the workpiece can be through-processed.

[0008] Preferably, the bottom inflatable shaft is detachably arranged on the base.

[0009] By adopting the above technical solution, pneumatic shafts of different specifications can be replaced according to the diameter and length of the workpiece.

[0010] Preferably, a reel and a winding rope are provided on the base, and the two reel shafts are symmetrically arranged relative to the bottom air expansion axis; the two ends of the winding rope are detachably connected to the two reel shafts, and the winding rope is used to spirally wind around the outer wall of the workpiece. By adopting the above technical solution, the bottom inflatable shaft applies force from the inner side of the workpiece to clamp the workpiece, so with the help of the winding shaft and the winding rope, the winding rope in a tightly wound state can apply force from the outer side to clamp the workpiece, so that the workpiece is not easily deformed at the bottom inflatable shaft, and at the same time, the friction force of the winding rope can be used to prevent the workpiece from rotating during processing.

[0011] Preferably, the block driving assembly includes an external block adsorption block and a lifting electromagnet, wherein the external block adsorption block is embedded in the outer wall of the protective block; the lifting electromagnet is vertically slidably arranged on the base, and the lifting electromagnet is used to be arranged on the outside of the workpiece, and the lifting electromagnet magnetically attracts the external block adsorption block.

[0012] By adopting the above technical solution, with the help of the cooperation between the external block adsorption block and the lifting electromagnet, the protection block inside the workpiece can be moved upward from the outside of the workpiece, so as to separate two adjacent protection blocks at different positions, thereby making the structure combining the top mounting rod and the protection block simpler, and thus can adapt to workpieces with smaller diameters.

[0013] Preferably, two lifting electromagnets are provided, and the two lifting electromagnets are symmetrically arranged relative to the bottom air expansion axis; the outer block adsorption block between two adjacent protection blocks is symmetrically arranged relative to the axis of the bottom air expansion axis.

[0014] By adopting the above technical solution, firstly, when two adjacent protection blocks at a certain position need to be separated, one of the lifting electromagnets magnetically attracts the outer block adsorption block located below, and the other lifting electromagnet magnetically attracts the outer block adsorption block located above, so that the two adjacent protection blocks at different positions can be separated more accurately; secondly, the two lifting electromagnets can respectively separate the adjacent protection blocks at two positions, so as to cooperate with the scenario of multi-tool processing.

[0015] Preferably, a connecting electromagnet is provided at the lower end of the top mounting rod, and the connecting electromagnet magnetically attracts the supporting tray; an inner block adsorption block is embedded in the inner wall of the protection block, and the inner block adsorption block is ring-shaped and connected to the connecting electromagnet.

[0016] By adopting the above technical solution, firstly, when it is necessary to drill two coaxial holes at a predetermined position, on the basis of separating adjacent protective blocks, the connection between the connecting electromagnet and the supporting plate can be released, and the top mounting rod can be pulled away from the processed position to avoid the tool, so that two coaxial holes can be drilled on the workpiece; secondly, the connecting electromagnet cooperates with the inner block adsorption block, and the top mounting rod can also absorb the protective block, so the top mounting rod can cooperate with the two lifting electromagnets to more stably and efficiently separate the adjacent protective blocks at two positions, thereby adapting to faster-paced processing.

[0017] Preferably, a rope-adjusting electric cylinder is provided between the winding shaft and the base, and the rope-adjusting electric cylinder is used to change the distance between the winding shaft and the base.

[0018] By adopting the above technical solution, after the workpiece is cut, the upper section of the workpiece needs to be removed. At this time, the height of the winding rope can be changed by adjusting the rope electrician, and the upper and lower sections of the workpiece can be tied tightly with the winding rope. Afterwards, during the process of the top mounting rod and the protective block being pulled away from the inside of the workpiece, the upper section of the workpiece can also remain stable, so that the upper section of the workpiece can be removed stably subsequently, thereby improving the safety of the workpiece processing environment.

[0019] Preferably, the protective block is provided with an installation ring groove, and the installation ring groove is embedded with an adjusting ring for damping sliding, and the adjusting ring is provided for the setting of the outer block adsorption block; a positioning slide and a lifting electric cylinder are provided between the lifting electromagnet and the base, and the positioning slide is slidably set on the base, and the positioning slide makes a circular motion around the bottom air shaft, and the lifting electric cylinder is set on the positioning slide, and the piston rod of the lifting electric cylinder is connected to the lifting electromagnet.

[0020] By adopting the above technical solution, the central angle spacing between the outer block adsorption blocks between adjacent protection blocks can be more diversified to change the relative positions of the two lifting electromagnets. In this way, the positions of other components can be changed accordingly according to the range of the area to be processed on the workpiece to provide more sufficient space for the tool.

[0021] Preferably, a radial positioning electric cylinder is arranged between the lifting electric cylinder and the positioning slide, a housing of the radial positioning electric cylinder is connected to the positioning slide, and a piston rod of the radial positioning electric cylinder is connected to the lifting electric cylinder.

[0022] By adopting the above technical solution, when adjacent protection blocks need to be separated, the lifting electromagnet can be attached to the outer wall of the workpiece through the radial adjustment electric cylinder. In this way, the protection block can be moved with a smaller magnetic field strength, thereby reducing the impact on another adjacent protection block, thereby making the separation between adjacent protection blocks smoother.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. When clamping, first sleeve the workpiece on the bottom air shaft, then expand the bottom air shaft, and then sleeve a predetermined number of protection blocks on the top mounting rod, and finally insert the top mounting part and the protection block into the inside of the workpiece until the support tray abuts against the upper end of the bottom air shaft. In this design, when performing surface treatment, the bottom air shaft and the protection block can be used to apply a supporting force to the workpiece from the inside of the workpiece. Therefore, while keeping the workpiece from being easily deformed, only different numbers of protection blocks are needed to adapt to workpieces of different lengths. When performing through-processing, the two adjacent protection blocks at different positions can be separated by the block driving assembly. Then, while avoiding the tool, there are protection blocks above and below the processing position on the workpiece, so the workpiece can still be protected. In summary, while stably clamping the workpiece and protecting the workpiece from being easily deformed, the workpiece can be subjected to through-processing. 2. With the cooperation between the external block adsorption block and the lifting electromagnet, the protection block inside the workpiece can be moved upward from the outside of the workpiece, so as to separate two adjacent protection blocks at different positions, so that the structure combining the top mounting rod and the protection block can be more concise, and thus can be adapted to workpieces with smaller diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the positioning fixture in the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram for illustrating the coordination structure between the protection block and the block driving assembly in the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram made to reflect the coordination structure between the connecting magnet and the inner block adsorption block in the embodiment of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Base; 11. Reel; 12. Winding rope; 13. Rope-adjusting cylinder; 2. Bottom air shaft; 3. Top positioning seat; 4. Top mounting rod; 41. Connecting electromagnet; 5. Support tray; 6. Protection block; 61. Inner block adsorption block; 7. Block drive assembly; 71. Outer block adsorption block; 72. Lifting electromagnet; 8. Mounting ring groove; 81. Adjusting ring; 9. Adjusting slide; 91. Lifting cylinder; 92. Radial positioning cylinder. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The embodiment of the present application discloses a positioning fixture for a soft thin pipe.

[0030] Reference Figure 1 and Figure 2 The positioning fixture for soft thin pipe fittings includes a base 1, a bottom air shaft 2, a top positioning seat 3, a top mounting rod 4, a support tray 5, a protective block 6 and a block driving assembly 7. The base 1 is fixedly arranged on an external frame, where the external frame usually refers to the fuselage of a machine tool; the bottom air shaft 2 is vertically mounted on the base 1, and the bottom air shaft 2 will be passed through the lower end of the workpiece; the top positioning seat 3 is movably arranged on the external frame so that the top positioning seat 3 can move axially or radially along the workpiece; the upper end of the top mounting rod 4 is connected to the top positioning seat 3, and the lower end can be passed through the inner side of the workpiece; the support tray 5 is detachably connected to the lower end of the top mounting rod 4; the protective block 6 is stacked and sleeved on the top mounting rod 4, and the outer wall of the peripheral side of the protective block 6 is used to abut the inner wall of the workpiece; the block driving assembly 7 is connected to multiple protective blocks 6 to separate two adjacent protective blocks 6 at different positions.

[0031] Reference Figure 1 and Figure 2When clamping, the workpiece is first sleeved on the bottom inflatable shaft 2, then the bottom inflatable shaft 2 is expanded, and then a predetermined number of protection blocks 6 are sleeved on the top mounting rod 4, and finally the top mounting part and the protection block 6 are inserted into the inner side of the workpiece until the support tray 5 abuts against the upper end of the bottom inflatable shaft 2. With this design, when performing surface treatment, the bottom inflatable shaft 2 and the protection block 6 can be used to apply a supporting force to the workpiece from the inner side of the workpiece. Therefore, while keeping the workpiece not easily deformed, only different numbers of protection blocks 6 are needed to adapt to workpieces of different lengths. When performing through-processing, the two adjacent protection blocks 6 at different positions can be separated by the block driving component 7. While avoiding the tool, there are protection blocks 6 above and below the processing position on the workpiece, so the workpiece can still be protected. In summary, while stably clamping the workpiece and protecting the workpiece from deformation, the workpiece can be subjected to through-processing.

[0032] Reference Figure 1 and Figure 2 Because the size range of workpieces that the pneumatic shaft can be compatible with is limited, in order to adapt to workpieces with a larger size range, the bottom pneumatic shaft 2 is detachably arranged on the base 1. It is only necessary to replace the pneumatic shafts of different specifications according to the diameter and length of the workpiece. At the same time, based on the internal clamping method of the pneumatic shaft, in order to keep the workpiece from being easily deformed, a winding shaft 11 and a winding rope 12 are arranged on the base 1. The two winding shafts 11 are symmetrically arranged relative to the bottom pneumatic shaft 2, and the two ends of the winding rope 12 are detachably connected to the two winding shafts 11 respectively. The winding rope 12 is used to spirally wind around the outer wall of the workpiece, so that the winding rope 12 can apply a force from the outside to clamp the workpiece, so that the workpiece is not easily deformed at the bottom pneumatic shaft 2, and the friction of the winding rope 12 can also be used to prevent the workpiece from rotating during processing.

[0033] Reference Figure 1 and Figure 2 In order to make the structure of the fixture more concise and adaptable to workpieces with smaller diameters, the following settings are correspondingly arranged: the block driving assembly 7 includes an external block adsorption block 71 and a lifting electromagnet 72. The external block adsorption block 71 is embedded in the outer wall of the protective block 6, and the lifting electromagnet 72 is vertically slidably arranged on the base 1. The lifting electromagnet 72 will be on the outside of the workpiece. The lifting electromagnet 72 magnetically attracts the external block adsorption block 71, and the two adjacent protective blocks 6 at different positions can be separated by means of magnetic force, so that the structure of the top mounting rod 4 combined with the protective block 6 can be more concise, and thus can adapt to workpieces with smaller diameters.

[0034] Reference Figure 2 and Figure 3In order to improve the comprehensive performance of the block driving assembly 7, two lifting electromagnets 72 are provided, and the two lifting electromagnets 72 are symmetrically arranged relative to the bottom inflatable shaft 2, and the outer block adsorption block 71 between two adjacent protection blocks 6 is symmetrically arranged relative to the axis of the bottom inflatable shaft 2. Such a structure has the following advantages. First, when it is necessary to separate two adjacent protection blocks 6 at a certain position, one of the lifting electromagnets 72 magnetically attracts the outer block adsorption block 71 located below, and the other lifting electromagnet 72 magnetically attracts the outer block adsorption block 71 located above, so that the two adjacent protection blocks 6 at different positions can be separated more accurately; second, the two lifting electromagnets 72 can separate the adjacent protection blocks 6 at two positions respectively, so as to cooperate with the scene of multi-tool processing.

[0035] Reference Figure 2 and Figure 3 In order to adapt to more abundant processing scenarios and cooperate with more efficient processing, the following settings are correspondingly arranged: a connecting electromagnet 41 is arranged at the lower end of the top mounting rod 4, and the connecting electromagnet 41 magnetically attracts the support tray 5. At the same time, an inner block adsorption block 61 is embedded in the inner wall of the protection block 6. The inner block adsorption block 61 is ring-shaped and connected to the connecting electromagnet 41. Such a structure has the following advantages. First, when two coaxial holes need to be drilled at a predetermined position, on the basis of separating adjacent protection blocks 6, the connection between the connecting electromagnet 41 and the support tray 5 can be released, and the top mounting rod 4 can be pulled away from the processed position to avoid the tool, so that two coaxial holes can be drilled on the workpiece; second, the connecting electromagnet 41 cooperates with the inner block adsorption block 61, and the top mounting rod 4 can also attract the protection block 6, so the top mounting rod 4 can cooperate with the two lifting electromagnets 72 to more stably and efficiently separate the adjacent protection blocks 6 at two positions, thereby adapting to faster-paced processing.

[0036] Reference Figure 1 and Figure 2 After the workpiece is cut, in order to stably remove the upper section of the workpiece, the following settings are correspondingly arranged: a rope adjusting electric cylinder 13 is arranged between the winding shaft 11 and the base 1, and the rope adjusting electric cylinder 13 can allow the winding shaft 11 to move up and down, so as to use the winding rope 12 to tighten the upper and lower sections of the workpiece. Afterwards, during the process of the top mounting rod 4 and the protective block 6 being withdrawn from the inside of the workpiece, the upper section of the workpiece can also remain stable, so that the upper section of the workpiece can be stably removed subsequently, thereby improving the safety of the workpiece processing environment.

[0037] Reference Figure 2 and Figure 3Since the existence of the fixture will interfere with the moving range of the tool, in order to adjust the layout of each component in the fixture according to different processing ranges, the following settings are correspondingly arranged: the protection block 6 is coaxially provided with a mounting ring groove 8, and the mounting ring groove 8 is embedded with a positioning ring 81 for damping sliding. The positioning ring 81 is embedded in the outer block adsorption block 71, and a positioning slide 9 and a lifting electric cylinder 91 are arranged between the lifting electromagnet 72 and the base 1. The positioning slide 9 is slidably arranged on the base 1, and the positioning slide 9 makes a circular motion around the bottom air shaft 2. The lifting electric cylinder 91 is arranged on the positioning slide 9, and the piston rod of the lifting electric cylinder 91 is connected to the lifting electromagnet 72.

[0038] Reference Figure 2 and Figure 3 , the central angle spacing between the outer block adsorption blocks 71 between adjacent protection blocks 6 can be more diverse to change the relative positions of the two lifting electromagnets 72. In this way, the positions of other components can be changed accordingly according to the range of the area to be processed on the workpiece to provide more space for the tool.

[0039] In addition, in the present embodiment, in order to reduce the adverse effect of the lifting electromagnet 72 on the non-directly acting protection block 6 among the adjacent protection blocks 6, a radial positioning cylinder 92 is arranged between the lifting cylinder 91 and the positioning slide 9. The shell of the radial positioning cylinder 92 is connected to the positioning slide 9, and the piston rod of the radial positioning cylinder 92 is connected to the lifting cylinder 91. When the adjacent protection blocks 6 need to be separated, the lifting electromagnet 72 can be attached to the outer wall of the workpiece through the radial positioning cylinder 92. In this way, the protection block 6 can be moved with a smaller magnetic field strength, thereby reducing the impact on another adjacent protection block 6, and making the separation between adjacent protection blocks 6 smoother.

[0040] The implementation principle of a positioning fixture for soft thin pipes in the embodiment of the present application is as follows: when clamping, the workpiece is first sleeved on the bottom inflatable shaft 2, then the bottom inflatable shaft 2 is expanded, and then a predetermined number of protection blocks 6 are sleeved on the top mounting rod 4, and finally the top mounting part and the protection block 6 are inserted into the inner side of the workpiece until the support tray 5 abuts against the upper end of the bottom inflatable shaft 2. In this design method, when performing surface treatment, with the help of the bottom inflatable shaft 2 and the protection block 6, a supporting force can be applied to the workpiece from the inner side of the workpiece. Therefore, while keeping the workpiece not easily deformed, only different numbers of protection blocks 6 are needed to adapt to workpieces of different lengths. When performing penetration processing, the block driving component 7 can be used to separate two adjacent protection blocks 6 at different positions. Then, while avoiding the tool, there are protection blocks 6 above and below the processing position on the workpiece, so the workpiece can still be protected. In summary, while stably clamping the workpiece and protecting the workpiece from deformation, the workpiece can be subjected to penetration processing.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning fixture for soft thin pipes, characterized in that: include: A base (1) for being arranged on an external frame; A bottom air shaft (2) is vertically arranged on the base (1), and the bottom air shaft (2) is used to penetrate the lower end of the workpiece; A top positioning seat (3) is used to be movably arranged on the external frame so that the top positioning seat (3) moves along the axial direction or radial direction of the workpiece; A top mounting rod (4), the upper end of which is connected to the top positioning seat (3), and the lower end of which is used to penetrate the inner side of the workpiece; A supporting tray (5) detachably connected to the lower end of the top mounting rod (4); A protection block (6) is stacked and sleeved on the top mounting rod (4), and the peripheral outer wall of the protection block (6) is used to abut against the inner wall of the workpiece; The block driving component (7) is connected to the plurality of protection blocks (6) and is used to separate two adjacent protection blocks (6) at different positions.

2. The positioning fixture for soft thin pipes according to claim 1, characterized in that: The bottom inflatable shaft (2) is detachably arranged on the base (1).

3. The positioning fixture for soft thin pipes according to claim 1, characterized in that: The base (1) is provided with a reel (11) and a winding rope (12), and the two reel shafts (11) are symmetrically arranged relative to the bottom inflatable shaft (2); the two ends of the winding rope (12) are respectively detachably connected to the two reel shafts (11), and the winding rope (12) is used for spirally winding around the outer wall of the workpiece.

4. The positioning fixture for soft thin pipes according to claim 1, characterized in that: The block driving assembly (7) comprises an outer block adsorption block (71) and a lifting electromagnet (72); the outer block adsorption block (71) is embedded in the outer wall of the protection block (6); the lifting electromagnet (72) is vertically slidably arranged on the base (1); the lifting electromagnet (72) is used to be arranged on the outside of the workpiece; the lifting electromagnet (72) magnetically attracts the outer block adsorption block (71).

5. The positioning fixture for soft thin pipes according to claim 4, characterized in that: Two lifting electromagnets (72) are provided, and the two lifting electromagnets (72) are symmetrically arranged relative to the bottom inflatable shaft (2); the outer block adsorption block (71) between two adjacent protection blocks (6) is symmetrically arranged relative to the axis of the bottom inflatable shaft (2).

6. The positioning fixture for soft thin pipes according to claim 5, characterized in that: A connecting electromagnet (41) is provided at the lower end of the top mounting rod (4), and the connecting electromagnet (41) magnetically attracts the supporting tray (5); an inner block adsorption block (61) is embedded in the inner wall of the protection block (6), and the inner block adsorption block (61) is ring-shaped and connected to the connecting electromagnet (41).

7. The positioning fixture for soft thin pipes according to claim 3, characterized in that: A rope-adjusting electric cylinder (13) is provided between the reel (11) and the base (1), and the rope-adjusting electric cylinder (13) is used to change the distance between the reel (11) and the base (1).

8. The positioning fixture for soft thin pipes according to claim 4, characterized in that: The protection block (6) is provided with a mounting ring groove (8), and the mounting ring groove (8) is embedded with a positioning ring (81) for damping sliding, and the positioning ring (81) is provided for the outer block adsorption block (71) to be set; a positioning slide (9) and a lifting electric cylinder (91) are provided between the lifting electromagnet (72) and the base (1), and the positioning slide (9) is slidingly arranged on the base (1), and the positioning slide (9) performs a circular motion around the bottom air shaft (2), and the lifting electric cylinder (91) is arranged on the positioning slide (9), and the piston rod of the lifting electric cylinder (91) is connected to the lifting electromagnet (72).

9. The positioning fixture for soft thin pipes according to claim 8, characterized in that: A radial positioning electric cylinder (92) is arranged between the lifting electric cylinder (91) and the positioning slide (9); a shell of the radial positioning electric cylinder (92) is connected to the positioning slide (9); and a piston rod of the radial positioning electric cylinder (92) is connected to the lifting electric cylinder (91).

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