Box type tool for machining pump body of gear pump

Abstract

The utility model discloses a box type tool for machining a pump body of a gear pump, which comprises a welding box body, a first clamping part and a second clamping part are arranged on the upper surface of the welding box body and used for clamping a workpiece to be machined to carry out a first machining procedure and a second machining procedure, and a third clamping part is arranged on the side face of the welding box body and used for clamping the workpiece to be machined to carry out a second machining procedure. And the clamp is used for clamping the to-be-machined workpiece for a third machining procedure. The space structure is optimized, the side face position of the tool is reasonably used for clamping parts, the size of the tool clamp is reduced, the occupancy rate of a machine tool is reduced, and the production cost of an enterprise is reduced. The supporting pin, the stop pin, the stop block, the rhombic pin and the cylindrical pin are adopted to quickly position a part, and the movable pressing plate and the open pressing plate are adopted to clamp the part, so that the part clamping efficiency is improved, and the labor intensity of operators is relieved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically a box-type tooling for machining gear pump bodies. Background Technology

[0002] During the machining of the gear pump body, it needs to be fixed and positioned to ensure machining accuracy and quality. Because there are many machining positions on the pump body, it typically requires 3-4 machining operations using a machining center to complete the process. Traditional tooling fixtures are large, and the machining center's worktable often cannot accommodate 3-4 tooling fixtures simultaneously, resulting in significant waste in manufacturing costs and processing efficiency for enterprises. Utility Model Content

[0003] The purpose of this invention is to provide a box-type tooling for machining gear pump bodies, which can optimize the spatial structure, make reasonable use of the side position of the tooling to clamp parts, reduce the fixture size, and reduce machine tool occupancy, thereby solving the problems mentioned above.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A box-type tooling for processing gear pump bodies includes a welded box body. The upper surface of the welded box body is provided with a clamping part one and a clamping part two for clamping the workpiece to be processed for processing steps one and two. The side of the welded box body is provided with a clamping part three for clamping the workpiece to be processed for processing step three.

[0006] The clamping part one includes four support pins arranged in a diamond shape on the upper surface of the welding box, used to elevate the workpiece to be processed and adjust its flatness; it also includes blocks and stop pins arranged at 90° on the upper surface of the welding box, used to position the workpiece to be processed in the first processing step; the upper surfaces of the welding box on both sides of the clamping part one are also provided with clamping components one, used to clamp and fix the workpiece to be processed.

[0007] The clamping part two also includes four support pins arranged in a rhombus on the upper surface of the welding box, and clamping components one on both sides. A cylindrical pin and a rhombus pin are arranged between the four support pins to position the workpiece to be processed in the second processing step.

[0008] The clamping part three includes four support pins arranged in a rhombus on the side of the welding box, and cylindrical pins and rhombus pins arranged between the four support pins, which are used to position the workpiece to be processed in the third processing step. The side of the welding box is provided with a clamping component two for clamping and fixing the workpiece to be processed.

[0009] Preferably, the lower surface of the welding box is provided with four U-shaped grooves for fixed connection with the T-shaped groove of the machining center by T-bolts, and the upper surface of the welding box is provided with four eye bolts for easy lifting of the welding box.

[0010] Preferably, the clamping assembly includes a first double-ended screw disposed on the top of the welding box, a hexagonal nut screwed to the top of the first double-ended screw, and a spring sleeved on its outer side. A movable pressure plate is provided on the first double-ended screw between the spring and the hexagonal nut, and its end is used to press the workpiece to be processed.

[0011] Preferably, the end of the movable pressure plate is Z-shaped to reduce the height of the double-ended screw and to position the hexagonal nut below the upper surface of the movable pressure plate, thus avoiding interference between the machining tool and the hexagonal nut and reducing the tool length.

[0012] Preferably, the movable pressure plate is provided with a waist hole through which the first double-headed screw passes to adjust the position of the movable pressure plate for easy placement of the workpiece to be processed. The bottom of the movable pressure plate is provided with a sliding groove, and a top rod is screwed to the upper surface of the welded box. The top end of the top rod is located in the sliding groove and is used to press the workpiece to be processed further against the end of the movable pressure plate.

[0013] Preferably, the second clamping assembly includes a second double-ended screw and an open pressure plate. The second double-ended screw is screwed to the side of the welded housing between the cylindrical pin and the diamond pin. The bottom of the open pressure plate is provided with an opening groove for cooperating with the second double-ended screw. The end of the second double-ended screw away from the welded housing is screwed with a hexagonal nut for cooperating with the open pressure plate to clamp the workpiece to be processed.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model optimizes the spatial structure, makes reasonable use of the side position of the tooling to clamp parts, reduces the fixture fixture volume, reduces machine tool occupancy, and lowers enterprise production costs. It uses support pins, stop pins, blocks, diamond pins, and cylindrical pins for rapid part positioning, and employs moving pressure plates and open pressure plates to clamp parts, improving part clamping efficiency and reducing the labor intensity of operators. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a top view of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram illustrating the installation method of the movable pressure plate in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the open pressure plate and the second double-headed screw in an embodiment of the present invention;

[0019] Figure 5 This is a three-dimensional schematic diagram of the working state of the workpiece being clamped according to an embodiment of the present invention;

[0020] Figure 6 This is a top view schematic diagram of the working state of the workpiece being clamped according to an embodiment of the present invention;

[0021] Figure 7 This is a front view schematic diagram of the working state of the workpiece being clamped according to an embodiment of the present invention;

[0022] Figure 8 This is a side view schematic diagram of the working state of the workpiece being clamped in an embodiment of this utility model.

[0023] In the diagram: 1. Opening pressure plate, 101. Opening groove, 2. Welded box body, 3. Diamond pin, 4. Eye bolt, 5. Hex nut, 6. Moving pressure plate, 601. Waist hole, 602. Slide groove, 7. First double-ended screw, 8. Support pin, 9. Stop pin, 10. Socket head screw, 11. Push rod, 12. Spring, 13. Stop block, 14. Cylindrical pin, 15. Second double-ended screw, 16. Workpiece to be processed. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0025] 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.

[0026] like Figures 1 to 8 As shown, this embodiment of the utility model includes a welding box 2. The upper and lower surfaces of the welding box 2 are ground flat to ensure the flatness and parallelism requirements of the two planes of the tooling. The mounting surface of the clamping part is kept perpendicular to the upper and lower planes. The lower surface of the welding box 2 is provided with four U-shaped grooves, which can be fixedly connected to the T-shaped grooves of the machining center using T-bolts. Four lifting eye bolts 4 are provided at the four corners of the upper surface of the welding box 2 for lifting the tooling.

[0027] The clamping section on the upper surface of the welding box 2 is the machining position for the vertical machining process. It has four support pins 8 to support the flat ground surface of the workpiece 16. Two stop pins 9 and one stop block 13 are fixed to the upper surface of the welding box 2 by hexagonal screws 10. The shape of the workpiece 16 is positioned by the stop pins 9 and the stop block 13, fixing its machining position. The support pins 8, stop pins 9, and stop block 13 are all made of 20CrMnTi carburized and quenched to improve surface hardness and extend the service life of the parts. Two sets of movable pressure plates 6 are located on the left and right sides of the workpiece 16 to press it down. The movable pressure plates 6 are set in a "Z" shape to facilitate lowering the height of the hexagonal nuts 5, avoiding impact on machining caused by the height of the hexagonal nuts 5. The movable pressure plates 6 are made of 40Cr material quenched to improve surface hardness to 38HRC-42HRC, extending the service life of the movable pressure plates 6 while retaining their toughness. The movable pressure plate 6 has a push rod 11 at its tail end. The top of the push rod 11 has a ball head, which is locally hardened to improve hardness and extend service life. The bottom of the push rod 11 has threads that connect to the welded housing 2 and are secured with a hexagonal nut 5. A first double-ended screw 7 is located in the middle of the movable pressure plate 6 and is secured to the upper surface of the welded housing 2 with a hexagonal nut 5. A spring 12 is fitted onto the first double-ended screw 7 to support the movable pressure plate 6. When releasing the movable pressure plate 6, simply loosen the hexagonal nut 5 slightly, and the spring 12 will lift the movable pressure plate 6, preventing it from falling downwards due to gravity. The movable pressure plate 6 can then be moved to the left or right out of the installation position of the workpiece 16, allowing the workpiece 16 to be removed. Using the movable pressure plate 6 to clamp the workpiece 16 facilitates the disassembly and clamping of pump body parts.

[0028] The clamping section on the upper surface of the welding box 2 is the machining position for the second vertical machining process. It has four support pins 8 to support the flat ground surface of the workpiece 16. A cylindrical pin 14 and a diamond pin 3 are located in the middle. The cylindrical pin 14 is used for centering, the diamond pin 3 for orientation, and the four support pins 8 for supporting the workpiece 16. The workpiece 16 is positioned using a two-pin positioning method on one side. The cylindrical pin 14 and diamond pin 3 are carburized and quenched using 20CrMnTi to improve surface hardness and extend the service life of the parts. Similar to the machining position in the first vertical machining process, the workpiece 16 is clamped using a movable pressure plate 6, a push rod 11, a first double-ended screw 7, a spring 12, and a hexagonal nut 5.

[0029] The clamping section 3 at the front of the welding box 2 is the machining position for the third vertical machining process. It has four support pins 8 to support the plane of the workpiece 16 to be processed. A cylindrical pin 14 and a diamond pin 3 are located in the middle. The cylindrical pin 14 is used for centering, the diamond pin 3 for orientation, and the four support pins 8 to support the workpiece 16. The workpiece 16 is positioned using a two-pin positioning method on one side. The support pins 8, cylindrical pins 14, and diamond pins 3 are carburized and quenched using 20CrMnTi to improve the surface hardness of the parts and extend their service life. A second double-ended screw 15 is located in the center of the workpiece 16. The second double-ended screw 15 is tightly fixed to the front of the welding box 2 by a hexagonal nut 5. After the workpiece 16 is inserted into the positioning position, an open pressure plate 1 is inserted from above. After the opening groove 101 of the open pressure plate 1 is placed in the center of the second double-ended screw 15, the hexagonal nut 5 is tightened to press the open pressure plate 1 and fix the workpiece 16. When loosening, simply loosen the hexagonal nut 5 slightly to remove the opening pressure plate 1 from above, and the workpiece 16 to be processed can be removed from the front. The opening pressure plate 1 is made of 40Cr material and quenched to improve the surface hardness to 38HRC-42HRC, extending the service life of the opening pressure plate 1 while retaining its toughness.

[0030] Before initial use, the upper surfaces of the four support pins 8 used in each machining process should be calibrated to ensure that the flatness of the upper surfaces of the four support pins 8 is no greater than 0.02mm. During use, in the first vertical machining operation position, the workpiece 16 is supported by the support pins 8. Simultaneously, the workpiece 16 is pressed against the stop pin 9 and the stop block 13. The movable pressure plate 6 is moved to the pressing position, and the hexagonal nut 5 is tightened to clamp the part. After the workpiece 16 is clamped, the figure-eight shaped inner hole is machined, and the sealing ring groove is drilled and milled. In the second vertical machining operation position, the figure-eight shaped inner hole of the workpiece 16 is positioned using the tooling cylindrical pin 14 and the diamond pin 3, and the four support pins 8 support the surface of the workpiece 16. The movable pressure plate 6 is moved to the pressing position, and the hexagonal nut 5 is tightened to clamp the part. After the workpiece 16 is clamped, the sealing ring groove is milled. In the vertical machining process, at position three, the "8"-shaped inner hole of the workpiece 16 is positioned using tooling cylindrical pin 14 and diamond pin 3, and four support pins 8 support the plane of the workpiece 16. The open pressure plate 1 is inserted into the second double-ended screw 15, and the hexagonal nut 5 is tightened to clamp the workpiece 16. After the workpiece 16 is clamped, the oil inlet plane is milled flat, a hole is drilled, and tapping is performed.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A box tool for machining a gear pump housing, characterized in that: The assembly includes a welding box, the upper surface of which is provided with clamping part one and clamping part two for clamping the workpiece to be processed for processing step one and processing step two, and the side of the welding box is provided with clamping part three for clamping the workpiece to be processed for processing step three. The clamping part one includes four support pins arranged in a diamond shape on the upper surface of the welding box, used to elevate the workpiece to be processed and adjust its flatness; it also includes blocks and stop pins arranged at 90° on the upper surface of the welding box, used to position the workpiece to be processed in the first processing step; the upper surfaces of the welding box on both sides of the clamping part one are also provided with clamping components one, used to clamp and fix the workpiece to be processed. The clamping part two also includes four support pins arranged in a rhombus on the upper surface of the welding box, and clamping components one on both sides. A cylindrical pin and a rhombus pin are arranged between the four support pins to position the workpiece to be processed in the second processing step. The clamping part three includes four support pins arranged in a rhombus on the side of the welding box, and cylindrical pins and rhombus pins arranged between the four support pins, which are used to position the workpiece to be processed in the third processing step. The side of the welding box is provided with a clamping component two for clamping and fixing the workpiece to be processed.

2. A box tooling for machining a gear pump body according to claim 1, characterized in that: The lower surface of the welding box is provided with four U-shaped grooves for fixed connection with the T-shaped groove of the machining center by T-bolts. The upper surface of the welding box is provided with four eye bolts for easy lifting and transport of the welding box.

3. A box tooling for machining a gear pump housing according to claim 1, characterized in that: The clamping assembly includes a first double-ended screw located on the top of the welding box. A hexagonal nut is screwed to the top of the first double-ended screw, and a spring is sleeved on its outer side. A movable pressure plate is provided on the first double-ended screw between the spring and the hexagonal nut, and its end is used to press the workpiece to be processed.

4. A box tooling for machining a gear pump body according to claim 3, characterized in that: The movable pressure plate has a Z-shaped end, which is used to reduce the height of the double-ended screw and make the position of the hexagonal nut lower than the upper surface of the movable pressure plate, so as to avoid interference between the machining tool and the hexagonal nut and help to reduce the tool length.

5. A box tooling for machining a gear pump housing according to claim 4, characterized in that: The movable pressure plate has a waist hole through which the first double-headed screw passes to adjust the position of the movable pressure plate for easy placement of the workpiece. The bottom of the movable pressure plate has a sliding groove, and a top rod is screwed to the upper surface of the welded box. The top end of the top rod is located in the sliding groove and is used to press the workpiece against the end of the movable pressure plate.

6. A box tooling for machining a gear pump body according to claim 1 or 3, characterized in that: The second clamping assembly includes a second double-ended screw and an open pressure plate. The second double-ended screw is screwed to the side of the welded housing between the cylindrical pin and the diamond pin. The bottom of the open pressure plate is provided with an opening groove for cooperating with the second double-ended screw. The end of the second double-ended screw away from the welded housing is screwed with a hexagonal nut for cooperating with the open pressure plate to clamp the workpiece to be processed.

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