Special tool for vertically machining inner needle valve sleeve square

Abstract

The invention relates to the technical field of special tools, and discloses a special tool for vertically machining a square inner needle valve sleeve, which comprises a hydraulic three-jaw chuck shell, a special cushion block and an L-shaped positioning block. Clamping jaws are evenly distributed in an inner cavity of the hydraulic three-jaw chuck shell and used for preliminarily clamping parts. The special cushion block is arranged at the bottom of the inner cavity of the shell, the copper bush is arranged on the upper surface of the special cushion block and located between the clamping jaws, and the surface of the copper bush is slotted, so that better supporting and positioning can be provided; the L-shaped positioning block is arranged on the upper surface of the shell and is screwed and fixed through the inner hexagon screw, the taper mandrel is inserted in the transverse position of the L-shaped positioning block, and parts can be accurately positioned. Through the structural combination, the tool effectively solves the problem of square batch machining of parts when the outer circles are provided with positioning holes and the relative positions need to be guaranteed, and compared with a traditional machining mode, the safety and reliability of part clamping are enhanced, the product precision is guaranteed, the adjustment difficulty is reduced, size control is convenient, and therefore the part size precision is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of special tooling, in particular to a special tooling for vertically processing the square of an inner needle valve sleeve. Background Art

[0002] Specialized tooling is used to machine the square features of needle valve sleeves on vertical machining centers. It is usually made of high-rigidity materials, and a precise positioning and clamping mechanism is used to ensure the axial and radial positioning accuracy of the sleeve. An anti-rotation structure is integrated to prevent deflection caused by cutting torque. Coolant channels and chip removal spaces are designed to improve machining quality, and the tooling is matched with CNC programs to achieve automated machining.

[0003] In the existing technology, when batch processing is carried out on square parts of inner needle valve sleeves that have positioning holes on the outer circle and need to ensure relative positions, traditional processing methods are difficult to effectively solve the problems of precise positioning and clamping of parts, resulting in insufficient safety and reliability of part clamping, difficulty in ensuring product accuracy, difficulty in calibration, and inconvenience in dimensional control during the processing process, which in turn affects the dimensional accuracy of the parts and product quality. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a special tooling for vertical processing of the inner needle valve sleeve square, so as to solve the problem that the traditional processing method proposed in the above background technology is difficult to effectively solve the problem of precise positioning and clamping of parts, resulting in insufficient safety and reliability of part clamping, difficulty in ensuring product accuracy, difficulty in calibration, and inconvenience in dimensional control during processing, which in turn affects the dimensional accuracy of parts and product quality.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a special tool for vertically processing the square of an inner needle valve sleeve, comprising:

[0008] A hydraulic three-jaw chuck housing, wherein the inner cavity of the hydraulic three-jaw chuck housing is evenly distributed with jaws;

[0009] A special pad is arranged at the bottom of the inner cavity of the hydraulic three-jaw chuck housing. A copper bushing is provided on the upper surface of the special pad. The copper bushing is located between the jaws and a groove is provided on the surface of the copper bushing.

[0010] An L-shaped positioning block is arranged on the upper surface of the hydraulic three-jaw chuck housing. A hexagon socket screw is screwed onto the upper surface of the L-shaped positioning block. The lower part of the hexagon socket screw is screwed onto the upper surface of the hydraulic three-jaw chuck housing. A tapered core shaft is inserted into the lateral position of the L-shaped positioning block.

[0011] Preferably, the surface of the L-shaped positioning block has a positioning hole corresponding to the position of the tapered mandrel, and the tapered mandrel is inserted into the positioning hole. The tapered mandrel is connected through the positioning hole on the L-shaped positioning block and inserted into the positioning hole on the part to fix the direction of the part. The three-jaw clamping assembly of the chuck completes the clamping of the part. After that, only the zero position needs to be set once, and the program can be called to process the four directions of the part.

[0012] Preferably, mounting holes are provided on both sides of the upper surface of the L-shaped positioning block, and the hexagon socket screws are passed through the mounting holes and screwed onto the surface of the hydraulic three-jaw chuck housing, so that the L-shaped positioning block can be stably installed.

[0013] Preferably, the lower inner sides of the clamping jaws are provided with receiving edges, and the special pads are located on the upper surface of the receiving edges. The receiving edges are used to support the special pads to prevent them from falling off from the hydraulic three-jaw chuck.

[0014] Preferably, connecting blocks are installed on the surface of the claw and the corresponding position of the receiving edge, plug-in grooves are opened on the front and back sides of the surface of the connecting block, and plug-in blocks are installed on the surface of the receiving edge and the corresponding position of the plug-in groove. The plug-in blocks are inserted into the plug-in grooves, which can facilitate the installation of the receiving edge.

[0015] Preferably, threaded rods are screwed on both the front and rear sides of the surface of the receiving edge, and the threaded rods pass through the plug-in block and are screwed on the surface of the connecting block, so that the receiving edge can be fixed by the threaded rods.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides a special tool for vertical machining of the inner needle valve sleeve, which has the following beneficial effects:

[0018] The special tooling for vertical machining of the inner needle valve sleeve square is to preliminarily clamp the part by evenly distributing the jaws in the inner cavity of the hydraulic three-jaw chuck shell. The special pad is arranged at the bottom of the inner cavity of the hydraulic three-jaw chuck shell and a copper bushing is provided on its upper surface. The copper bushing is located between the jaws and has a groove on the surface, which can provide better support and positioning during clamping; the L-shaped positioning block is arranged on the upper surface of the hydraulic three-jaw chuck shell and is fixed by screwing with an inner hexagon screw. A tapered core shaft is inserted in its lateral position to accurately position the part. This structural combination effectively solves the problem of batch processing of parts when there are positioning holes on the outer circle and the relative position needs to be guaranteed. Compared with the traditional processing method, the safety and reliability of part clamping are enhanced, the product accuracy is effectively guaranteed, the difficulty of calibration is reduced, the dimensional control during the processing is convenient, and the dimensional accuracy of the parts is effectively guaranteed, and the product quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 An exploded perspective view of an L-shaped positioning block of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the copper bushing of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention when viewed from above;

[0023] Figure 5 It is a structural schematic diagram of the clamping claw of the present invention.

[0024] In the figure: 1. Hydraulic three-jaw chuck housing; 2. Jaws; 3. Special spacer; 4. Copper bushing; 41. Slot; 5. L-shaped positioning block; 6. Hexagon socket screw; 7. Tapered mandrel; 8. Positioning through hole; 9. Mounting through hole; 10. Connecting edge; 11. Connecting block; 12. Plug-in slot; 13. Plug-in block; 14. Threaded rod. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The present invention provides a technical solution, a special tool for vertical processing of the inner needle valve sleeve square, please refer to Figure 1 , comprising a hydraulic three-jaw chuck housing 1, the inner cavity of which is evenly distributed with jaws 2;

[0027] See also Figure 4 , special pad 3, set at the bottom of the inner cavity of the hydraulic three-jaw chuck housing 1, please refer to Figure 1 , the upper surface of the special pad 3 is provided with a copper bushing 4, please refer to Figure 3 , the copper bushing 4 is located between the claws 2, and a groove 41 is formed on the surface of the copper bushing 4;

[0028] See also Figure 1 The L-shaped positioning block 5 is arranged on the upper surface of the hydraulic three-jaw chuck housing 1. The upper surface of the L-shaped positioning block 5 is screwed with a hexagon socket screw 6. The lower part of the hexagon socket screw 6 is screwed to the upper surface of the hydraulic three-jaw chuck housing 1. A tapered core shaft 7 is inserted in the lateral position of the L-shaped positioning block 5.

[0029] The parts are initially clamped by evenly distributing the jaws 2 in the inner cavity of the hydraulic three-jaw chuck housing 1, and a special pad 3 is arranged at the bottom of the inner cavity of the hydraulic three-jaw chuck housing 1 and a copper bushing 4 is provided on its upper surface. The copper bushing 4 is located between the jaws 2 and has a groove 41 on the surface, which can provide better support and positioning during clamping; an L-shaped positioning block 5 is arranged on the upper surface of the hydraulic three-jaw chuck housing 1 and is fixed by screwing with a hexagon socket screw 6. A tapered core shaft 7 is inserted in its lateral position to accurately position the parts. This structural combination effectively solves the problem of batch processing of parts with positioning holes on the outer circle and the need to ensure relative position. Compared with traditional processing methods, it enhances the safety and reliability of part clamping, effectively ensures product accuracy, reduces the difficulty of calibration and adjustment, facilitates dimensional control during processing, and thus effectively ensures the dimensional accuracy of parts and improves product quality.

[0030] See also Figure 2 The L-shaped locating block 5 has a positioning hole 8 on its surface corresponding to the tapered mandrel 7. The tapered mandrel 7 is inserted into the positioning hole 8. The tapered mandrel 7 is connected through the positioning hole 8 on the L-shaped locating block 5 and inserted into the positioning hole on the part to fix the direction of the part. The chuck's three-jaw clamping assembly completes the part clamping. After that, only the zero position needs to be set once, and the program can be called to process the part in all directions.

[0031] Mounting holes 9 are provided on both sides of the upper surface of the L-shaped positioning block 5. The hexagon socket screws 6 pass through the mounting holes 9 and are screwed onto the surface of the hydraulic three-jaw chuck housing 1, so that the L-shaped positioning block 5 can be stably installed.

[0032] The lower inner side of the clamping jaw 2 is provided with a receiving edge 10, and the special pad 3 is located on the upper surface of the receiving edge 10. The receiving edge 10 is used to support the special pad 3 to prevent the special pad 3 from falling off from the hydraulic three-jaw chuck.

[0033] See also Figure 5 The surface of the claw 2 and the corresponding position of the receiving edge 10 are both installed with connecting blocks 11, and the front and rear sides of the surface of the connecting block 11 are provided with plug-in grooves 12. The surface of the receiving edge 10 and the corresponding positions of the plug-in grooves 12 are both installed with plug-in blocks 13. The plug-in blocks 13 are inserted into the plug-in grooves 12, which can facilitate the installation of the receiving edge 10.

[0034] Threaded rods 14 are screwed on both the front and rear sides of the surface of the receiving edge 10 . The threaded rods 14 pass through the plug-in block 13 and are screwed on the surface of the connecting block 11 . The receiving edge 10 can be fixed by the threaded rods 14 .

[0035] The special spacer 3 must ensure that the upper and lower surfaces are level, the parallelism of the two surfaces does not exceed 0.02, and the roughness of the two surfaces does not exceed Ra0.8. It needs to be placed on the machine table in the hydraulic three-jaw chuck. Its height design must ensure that the positioning hole on the outer circle of the part and the positioning through hole 8 on the L-shaped positioning block 5 are at the same height after clamping;

[0036] The part is placed in the copper bushing 4, which is designed to protect the outer circle of the part from being clamped. Since copper is relatively soft, the gap between its inner hole and outer circle is controlled at 0.05mm. In addition, its 4mm slot 41 design can ensure that the clamping jaw 2 has sufficient clamping force when clamping without causing damage to the part;

[0037] The L-shaped positioning block 5 is used as a positioning reference. It needs to be straightened and leveled to within 0.02mm, and then installed and fixed on the upper plane of the hydraulic three-jaw chuck to ensure that the positioning through hole 8 on the L-shaped positioning block 5 is consistent in height with the positioning hole on the outer circle of the placed part.

[0038] When this solution is working: clean the machine table and various tooling components of the vertical machining center, place the hydraulic three-jaw chuck in the appropriate position on the vertical machining table, install and fix the chuck, and then connect it to the hydraulic system of the machine tool.

[0039] The special pad 3 ensures that the parallelism of the two planes does not exceed 0.02, and it is placed on the machine tool table in the center of the hydraulic three-jaw chuck as the base of the tooling assembly.

[0040] Straighten and level the L-shaped positioning block 5 to ensure it is within 0.02mm, and use the hexagon socket screw 6 to fix it on the hydraulic three-jaw chuck.

[0041] Place the parts in the copper bushing 4, and then place the assembly on the special pad 3, so that the positioning holes on the outer circle of the parts and the positioning holes of the L-shaped positioning block 5 are at the same height.

[0042] The manually used tapered mandrel 7 is connected to the positioning through hole 8 on the L-shaped positioning block 5 and inserted into the positioning hole on the part to fix the direction of the part.

[0043] The hydraulic three-jaw chuck clamping assembly is used to complete the clamping of the parts, set the zero position, and call the program to process the parts in all directions.

[0044] After completing the complete processing of a part, loosen the chuck, remove the processed part, repeat the previous steps, and then batch processing of parts can be carried out.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A special tool for vertical processing of the inner needle valve sleeve, characterized in that: include: A hydraulic three-jaw chuck housing (1), wherein the inner cavity of the hydraulic three-jaw chuck housing (1) is evenly distributed with jaws (2); A special pad (3) is arranged at the bottom of the inner cavity of the hydraulic three-jaw chuck housing (1), and a copper bushing (4) is provided on the upper surface of the special pad (3). The copper bushing (4) is located between the jaws (2), and a groove (41) is provided on the surface of the copper bushing (4); An L-shaped positioning block (5) is arranged on the upper surface of the hydraulic three-jaw chuck housing (1); a hexagon socket screw (6) is screwed onto the upper surface of the L-shaped positioning block (5); the lower portion of the hexagon socket screw (6) is screwed onto the upper surface of the hydraulic three-jaw chuck housing (1); and a tapered core shaft (7) is inserted into the lateral position of the L-shaped positioning block (5).

2. The special tool for vertical machining of the inner needle valve sleeve according to claim 1, characterized in that: A positioning through hole (8) is provided on the surface of the L-shaped positioning block (5) at a position corresponding to the tapered core shaft (7), and the tapered core shaft (7) is inserted into the interior of the positioning through hole (8).

3. The special tool for vertical machining of the inner needle valve sleeve according to claim 1, characterized in that: Both sides of the upper surface of the L-shaped positioning block (5) are provided with mounting holes (9), and the hexagon socket screws (6) are passed through the mounting holes (9) and screwed to the surface of the hydraulic three-jaw chuck housing (1).

4. The special tool for vertical machining of the inner needle valve sleeve according to claim 1, characterized in that: The inner sides of the lower parts of the clamping claws (2) are all provided with receiving edges (10), and the special pads (3) are all located on the upper surfaces of the receiving edges (10).

5. The special tool for vertical machining of the inner needle valve sleeve according to claim 4, characterized in that: Connecting blocks (11) are installed at positions corresponding to the surfaces of the clamping claws (2) and the receiving edge (10), plug-in slots (12) are provided on both the front and rear sides of the surface of the connecting block (11), and plug-in blocks (13) are installed at positions corresponding to the surfaces of the receiving edge (10) and the plug-in slots (12).

6. The special tool for vertical machining of the inner needle valve sleeve according to claim 5, characterized in that: Threaded rods (14) are screwed on both the front and rear sides of the surface of the receiving edge (10), and the threaded rods (14) pass through the plug-in block (13) and are screwed on the surface of the connecting block (11).

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