Positioning tool for machining side cover of gear pump

Abstract

The application provides a positioning tool for machining of a side cover of a gear pump, which comprises a tool base plate, positioning pins for mounting the tool base plate to a corresponding position of a workbench of equipment and locking by four groups of base plate fixing bolts, a workpiece locking unit arranged on the top end face of the tool base plate and used for positioning the side cover of the gear pump, the workpiece locking unit is arranged in three groups and surrounds the workpiece locking unit, and the workpiece locking unit is arranged in a triangular shape as a whole, a workpiece side surface positioning and mounting assembly arranged on one side of the workpiece locking unit and comprising a support plate, a disc positioning tool arranged on the tool base plate and mounted on the tool base plate by fixing bolts, and at least one group of auxiliary positioning supports arranged on the tool base plate. The three groups of workpiece locking units which surround and are arranged in a triangular shape realize three-point positioning of the workpiece and press the workpiece, so that there is almost no press-fitting deformation problem after installation.

Description

Technical Field

[0001] This utility model belongs to the field of gear pump side cover processing technology, and specifically relates to a positioning fixture for gear pump side cover processing. Background Technology

[0002] Gear pumps are a widely used product. A gear pump consists of two gears, a pump body, and multiple sets of side covers forming two enclosed spaces. The side covers are one of the core components of the gear pump; they are important locations for installing the pump's drive shaft and sealing components, and they are the sealing components of the pump casing.

[0003] Most existing gear pump side covers are manufactured using milling and drilling machines. However, due to insufficient workpiece clamping rigidity and the high positioning accuracy requirements of the sealing parts and pump casing, the processing difficulty and time are greatly increased, thus affecting the pump's production efficiency and performance.

[0004] Therefore, how to solve the defects in the existing technology has become one of the urgent problems to be solved in the field of gear pump side cover processing technology. Utility Model Content

[0005] In view of the problems existing in the background art, the present invention provides, on the one hand, a positioning fixture for machining the side cover of a gear pump, including,

[0006] Tooling base plate,

[0007] Positioning pins are used to install the tooling base plate to the corresponding position on the equipment workbench, and are locked in place by four sets of base plate fixing bolts.

[0008] The workpiece locking unit is located on the top end face of the tooling base plate and is used to position the gear pump side cover. The workpiece locking unit is arranged in three sets and surrounds each other, so that the whole is arranged in a triangular shape.

[0009] The workpiece side positioning and mounting assembly is located on one side of the workpiece locking unit, and the workpiece side positioning and mounting assembly includes a support plate;

[0010] A disc positioning fixture is disposed on the fixture base plate and installed on the fixture base plate by fixing bolts.

[0011] The tooling base plate is also provided with at least one set of auxiliary positioning support components.

[0012] Optionally, the workpiece locking unit includes a small base plate.

[0013] The small base plate is mounted on the tooling base plate by the first fixing bolt;

[0014] The workpiece locking unit also includes a locking unit body that is mounted on the small base plate by a second fixing bolt.

[0015] Optionally, a support column is provided inside the locking unit body.

[0016] Furthermore, the support column is installed within the locking unit body via a support set screw.

[0017] The support post passes through the circular hole in the locking unit body and extends out of the locking unit body.

[0018] A support bolt is provided on the end of the support column extending from the locking unit body, and the position is fixed by a locking nut.

[0019] Optionally, a pressure plate assembly is provided within the locking unit body.

[0020] Furthermore, the pressure plate assembly can move up and down via the pressure plate set bolts.

[0021] The pressure plate assembly includes the sleeve disposed within the locking unit body.

[0022] Furthermore, a pressure plate is provided inside the sleeve.

[0023] Furthermore, the pressure plate assembly supports and tightens the workpiece through the pressure plate set screw.

[0024] Optionally, a pressure plate bolt is provided at the end of the pressure plate extending from the locking unit body.

[0025] It is fixed by tightening the nuts with pressure plate bolts.

[0026] Optionally, a support block is provided on one side of the support plate.

[0027] Furthermore, the connection between the support plate and the support block is achieved by fixing bolts to the support plate;

[0028] A positioning block is provided on one side of the support block and is fixed by a set bolt.

[0029] The positioning block is fixed to the tooling base plate by positioning block fixing bolts.

[0030] Optionally, the support plate is also provided with at least one set of positioning bolts.

[0031] Furthermore, a support plate locking nut for locking is provided on the positioning bolt near the support block.

[0032] Optionally, the disc positioning fixture is equipped with a positioning mandrel.

[0033] A circular pressure plate is provided on the positioning mandrel.

[0034] It is then fixed to the positioning mandrel using pressure plate bolts.

[0035] Optionally, the auxiliary positioning support includes a positioning seat.

[0036] and the positioning pin disposed within the positioning seat.

[0037] The positioning pin and the positioning seat are connected by a set bolt.

[0038] Furthermore, the positioning pin is fixedly installed in the positioning pin hole of the tooling base plate.

[0039] A positioning bolt is provided inside the positioning seat located away from the positioning pin.

[0040] Furthermore, the positioning bolt passes through the positioning seat and extends outwards.

[0041] The positioning bolt is used in conjunction with the locking nut to fix the position.

[0042] In summary, the beneficial effects of this utility model are:

[0043] This invention achieves three-point positioning and clamping of the workpiece through three sets of workpiece locking units arranged in a triangular pattern, so that there is almost no pressure deformation problem after installation. In addition, the use of auxiliary positioning support components can improve the installation rigidity of the workpiece, thereby greatly reducing the vibration problem during the workpiece processing, improving the pressure deformation of the workpiece, ensuring the form and position tolerance of the product from a process perspective, and thus effectively solving the problem of pin hole machining position accuracy. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the positioning fixture for machining the side cover of a gear pump according to this utility model;

[0045] Figure 2 This is a schematic diagram of the workpiece locking unit structure of an embodiment of the positioning fixture for machining the side cover of a gear pump according to this utility model;

[0046] Figure 3 This is a partial structural schematic diagram of an embodiment of the positioning fixture for machining the side cover of a gear pump according to the present invention.

[0047] Figure label:

[0048] 1. Locating pin; 2. Tooling base plate; 3. Base plate fixing bolt; 4. Locating block; 5. Locating block fixing bolt; 6. Support block; 7. Support block fastening screw; 8. Support plate; 9. Support plate fixing bolt; 10. Support plate locking nut; 11. Locating bolt; 12. Small base plate; 13. First fixing bolt; 14. Second fixing bolt; 15. Locking unit body; 16. Support set screw; 17. Pressure plate set screw; 18. Pressure plate set bolt; 19. Support bolt; 20. Locking nut; 21. Support column;

[0049] 22. Pressure plate assembly; 221. Sleeve; 222. Pressure plate;

[0050] 23. Pressure plate bolt and lock nut; 24. Pressure plate bolt; 25. Locating pin; 26. Pressure plate bolt; 27. Round pressure plate; 28. Locating mandrel; 29. ​​Round disc positioning fixture; 30. Fixing bolt; 31. Locating seat; 32. Lock nut; 33. Locating bolt; 34. Fixing bolt; 35. Set bolt; 36. Locating pin. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to facilitate a more thorough understanding of the present utility model and to fully convey the concept of the present utility model to those skilled in the art.

[0052] In the description of this specification, the references to terms such as "certain embodiments," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] like Figure 1-3 As shown, this embodiment provides a positioning fixture for machining the side cover of a gear pump, including a fixture base plate 2. The bottom end face of the fixture base plate 2 is provided with at least one set of positioning pins 1. The fixture base plate 2 is installed on the corresponding position of the equipment workbench by the positioning pins 1 and locked by four sets of base plate fixing bolts 3.

[0055] The tooling base plate 2 is provided with a workpiece locking unit for positioning the gear pump side cover. The workpiece locking unit is arranged in three sets and surrounds each other, so that the whole is arranged in a triangular shape.

[0056] The workpiece locking unit includes a small base plate 12, and the small base plate 12 is fixedly installed on the tooling base plate 2 by a first fixing bolt 13.

[0057] The workpiece locking unit further includes a locking unit body 15 mounted on the small base plate 12 by a second fixing bolt 14, and a support column 21 is provided inside the locking unit body 15, and the support column 21 is mounted inside the locking unit body 15 by a support set screw 16.

[0058] The support column 21 passes through the circular hole of the locking unit body 15 and extends out of the locking unit body 15. A support bolt 19 is provided on the end of the support column 21 extending out of the locking unit body 15, and the position is fixed by the locking nut 20.

[0059] Furthermore, a pressure plate assembly 22 is provided inside the locking unit body 15, and the pressure plate assembly can move up and down through the pressure plate set bolt 18.

[0060] The pressure plate assembly 22 includes a sleeve 221 disposed within the locking unit body 15, and a pressure plate 222 is disposed within the sleeve 221. The pressure plate 222 can slide within the sleeve 221, and the pressure plate assembly supports and clamps the workpiece through the pressure plate set screw 17.

[0061] Furthermore, a pressure plate bolt 24 is provided at the end of the pressure plate 222 extending out of the locking unit body 15, and it is fixed by the pressure plate bolt locking nut 23.

[0062] In this embodiment, those skilled in the art should understand that by using three sets of workpiece locking units arranged in a triangular pattern around the workpiece, three-point positioning and clamping of the workpiece can be achieved, so that there is almost no problem of pressure deformation after installation.

[0063] In this embodiment, the pressure plate set bolt 18 passes through the sleeve 221 and abuts against the top end face of the pressure plate 222;

[0064] A sleeve 221 is integrally formed with the end face of the pressure plate set screw 18, and the pressure plate set screw 18 away from the sleeve 221 passes through the end face of the locking unit body 15 and is fixed in position by the pressure plate locking member (locking nut).

[0065] A workpiece side positioning and mounting assembly is provided on one side of the workpiece locking unit, and the workpiece side positioning and mounting assembly includes a support plate 8, and a support block 6 is provided on one side of the support plate 8. The connection between the support plate and the support block 6 is achieved by the support plate fixing bolt 9.

[0066] A positioning block 4 is provided on one side of the support block 6 and is fixed by a set bolt. The positioning block 4 is fixed to the tooling base plate 2 by a positioning block fixing bolt 5.

[0067] Furthermore, the support plate 11 is also provided with at least one set of positioning bolts 11, and the positioning bolts 11 near the support block 6 are provided with support plate locking nuts for locking.

[0068] In this embodiment, the workpiece is positioned laterally by positioning bolts and locking nuts on the support plate 8.

[0069] Furthermore, a disc positioning fixture 29 is also provided on the tooling base plate 2, and the disc positioning fixture 29 is installed on the tooling base plate 2 by fixing bolts 30. A positioning mandrel 28 is provided on the disc positioning fixture 29 so that the positioning mandrel and the disc positioning fixture can be precisely matched. A circular pressure plate 27 is provided on the positioning mandrel 28, and it is fixed to the positioning mandrel 28 by pressure plate bolts 26.

[0070] Furthermore, the tooling base plate 2 is also provided with at least one set of auxiliary positioning support members, and the auxiliary positioning support members include a positioning seat 31 and a positioning pin 36 disposed in the positioning seat 31. The positioning pin 36 and the positioning seat 31 are connected by a set bolt 35, and the positioning pin 36 is fixedly installed in the positioning pin hole of the tooling base plate 2.

[0071] A positioning bolt 33 is provided in the positioning seat 31 away from the positioning pin 36. The positioning bolt passes through the positioning seat 31 and extends out. The positioning bolt 33 is used in conjunction with the locking nut 32 to fix the position.

[0072] Furthermore, the auxiliary positioning support, workpiece locking unit, and workpiece side positioning mounting assembly are all made of high-quality carbon steel that has undergone heat treatment. Because this utility model is made entirely of high-quality carbon steel and has undergone heat treatment, the tooling itself is rigid, has excellent performance, and is not prone to stress deformation during long-term use.

[0073] This invention achieves three-point positioning and clamping of the workpiece through three sets of workpiece locking units arranged in a triangular pattern, ensuring minimal deformation after installation. Furthermore, the use of auxiliary positioning supports further enhances the workpiece's installation rigidity, significantly reducing vibration during processing and resolving the pin hole machining accuracy issue. This improves workpiece pressure deformation and guarantees the product's form and position tolerances from a process perspective, effectively addressing the pin hole machining accuracy problem.

[0074] In practical applications, this invention, through the coordinated use of auxiliary positioning supports, workpiece locking units, and workpiece side positioning mounting components, enables the processing of gear pump side covers. It eliminates the need for frequent tooling changes during processing, significantly improving work efficiency. Simultaneous clamping of a single product allows for the completion of one finished product in a single operation, facilitating production cycle control. Due to the limited space in the tooling design, the workpiece's basic position is largely determined after installation, requiring only minor adjustments by the worker before tightening the pressure plate bolts. This minimizes the ineffective time spent on auxiliary clamping, further enhancing work efficiency and reducing worker workload. Furthermore, the secure clamping of the product within the tooling allows for automated nighttime operation, further improving production efficiency.

[0075] When using this utility model, when installing the auxiliary positioning support, workpiece locking unit and workpiece side positioning mounting assembly, first adjust the support bolts 19 on the support column 21 so that the plane height of the triangular support bolts is the same. During installation, the error can be controlled within 0.5mm. Then tighten the locking nut 20 to fix it.

[0076] Then, the workpiece flange back is constrained in three directions by three sets of support bolts;

[0077] Then, the workpiece is positioned in the Z-axis rotation direction and X-direction by the positioning bolt 11; the Y-direction is positioned by the auxiliary positioning support located at the positions of the three sets of support bolts. The combination of the two enhances the workpiece clamping rigidity and prevents vibration during workpiece processing.

[0078] Finally, tighten the set bolts 18 on the pressure plate to pre-tighten the bottom surface of the workpiece flange on the end face of the pressure plate 22, and then tighten the set screws 17 on the pressure plate to completely fix the workpiece. Then, perform initial machining on the workpiece. After the initial machining is completed, the workpiece is installed on the positioning mandrel 28 of the disc positioning fixture 29, and then the workpiece is fastened by the circular pressure plate and pressure plate bolts. Finally, the installation rigidity of the workpiece is enhanced by the auxiliary positioning support located at the position of the disc positioning fixture 29.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not restrictive. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning fixture for machining the side cover of a gear pump, characterized in that, include, Tooling base plate, Positioning pins are used to install the tooling base plate to the corresponding position on the equipment workbench, and are locked in place by four sets of base plate fixing bolts. The workpiece locking unit is located on the top end face of the tooling base plate and is used to position the gear pump side cover. The workpiece locking unit is arranged in three sets and surrounds each other, so that the whole is arranged in a triangular shape. The workpiece side positioning and mounting assembly is located on one side of the workpiece locking unit, and the workpiece side positioning and mounting assembly includes a support plate; A disc positioning fixture is disposed on the fixture base plate and installed on the fixture base plate by fixing bolts. The tooling base plate is also provided with at least one set of auxiliary positioning support components.

2. The positioning fixture for machining the side cover of a gear pump according to claim 1, characterized in that, The workpiece locking unit includes a small base plate. The small base plate is mounted on the tooling base plate by the first fixing bolt; The workpiece locking unit also includes a locking unit body that is mounted on the small base plate by a second fixing bolt.

3. The positioning fixture for machining the side cover of a gear pump according to claim 2, characterized in that, The locking unit body is provided with a support column. Furthermore, the support column is installed within the locking unit body via a support set screw. The support post passes through the circular hole in the locking unit body and extends out of the locking unit body. A support bolt is provided on the end of the support column extending from the locking unit body, and the position is fixed by a locking nut.

4. The positioning fixture for machining the side cover of a gear pump according to claim 3, characterized in that, A pressure plate assembly is located within the locking unit body. Furthermore, the pressure plate assembly can move up and down via the pressure plate set bolts. The pressure plate assembly includes a sleeve disposed within the locking unit body. Furthermore, a pressure plate is provided inside the sleeve. Furthermore, the pressure plate assembly supports and tightens the workpiece through the pressure plate set screw.

5. The positioning fixture for machining the side cover of a gear pump according to claim 4, characterized in that, A pressure plate bolt is provided at the end of the pressure plate extending out of the locking unit body. It is fixed by tightening the nuts with pressure plate bolts.

6. The positioning fixture for machining the side cover of a gear pump according to claim 1, characterized in that, A support block is provided on one side of the support plate. Furthermore, the connection between the support plate and the support block is achieved by fixing bolts to the support plate; A positioning block is provided on one side of the support block and is fixed by a set bolt. The positioning block is fixed to the tooling base plate by positioning block fixing bolts.

7. The positioning fixture for machining the side cover of a gear pump according to claim 6, characterized in that, The support plate is also provided with at least one set of positioning bolts. Furthermore, a support plate locking nut for locking is provided on the positioning bolt near the support block.

8. The positioning fixture for machining the side cover of a gear pump according to claim 1, characterized in that, The disc positioning fixture is equipped with a positioning mandrel. A circular pressure plate is provided on the positioning mandrel. It is then fixed to the positioning mandrel using pressure plate bolts.

9. The positioning fixture for machining the side cover of a gear pump according to claim 8, characterized in that, The auxiliary positioning support includes a positioning seat. and the positioning pin disposed within the positioning seat. The positioning pin and the positioning seat are connected by a set bolt. Furthermore, the positioning pin is fixedly installed in the positioning pin hole of the tooling base plate. A positioning bolt is provided inside the positioning seat located away from the positioning pin. Furthermore, the positioning bolt passes through the positioning seat and extends outwards. The positioning bolt is used in conjunction with the locking nut to fix the position.

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