Engine block machining tooling

Abstract

This utility model discloses a machining fixture for engine housings, comprising a rotating worktable, a clamping device disposed on the rotating worktable, at least one positioning seat, and at least one positioning pin. The clamping device includes a pressure plate and a lifting member disposed on the rotating worktable. The middle part of the pressure plate is hinged to the rotating worktable, and the rotation plane of the pressure plate intersects with the placement plane of the workpiece. The lifting member is located on the side of the pressure plate away from the workpiece from the hinge point, and is used to lift the pressure plate to rotate it. The positioning seat has a positioning surface, and when the pressure plate clamps the workpiece, the workpiece fits against the positioning surface. The workpiece has a pin hole corresponding to at least one positioning pin. This utility model can improve the clamping and fixing efficiency and reduce costs during engine housing machining.

Description

Technical Field

[0001] This utility model relates to the technical field of machining tooling, and in particular to a machining tooling for an engine housing. Background Technology

[0002] Engine housing assembly for motorcycles, cars, and other motor vehicles refers to the process of combining the left and right engine housings into a complete, sealed cavity through precision machining and assembly. This assembly step is a crucial step in engine manufacturing or repair, directly affecting the engine's sealing performance, lubrication system operation, and the precision of component fit.

[0003] Before assembling the engine housing, drilling and tapping processes are required on the left and right housings, typically involving machining in three directions. Before machining the engine housing, a fixture must be used to clamp and secure it.

[0004] Typically, machining a workpiece (engine housing) on ​​three machining centers requires designing a set of tooling for each of the three machining centers, and then mounting the three machining centers sequentially onto the corresponding tooling for clamping and fixing. This means the worker has to assemble and disassemble the machine a total of three times during the machining of the engine housing, resulting in low machine tool utilization and high labor costs. Furthermore, the high cost of multiple sets of tooling is detrimental to market competitiveness. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an engine housing machining fixture that can improve the clamping and fixing efficiency and reduce the cost during engine housing machining.

[0006] To solve the above-mentioned technical problems, the engine housing machining fixture provided by this utility model adopts the following technical solution:

[0007] An engine block machining fixture includes a rotating worktable, a clamping device disposed on the rotating worktable, at least one positioning seat, and at least one positioning pin. The clamping device includes a pressure plate and a lifting member disposed on the rotating worktable. The middle part of the pressure plate is hinged to the rotating worktable, and the rotation plane of the pressure plate intersects with the placement plane of the workpiece. The lifting member is located on the side of the pressure plate away from the workpiece from the hinge point, and the lifting member is used to lift the pressure plate to rotate it. The positioning seat has a positioning surface, and when the pressure plate clamps the workpiece, the workpiece is in contact with the positioning surface. The workpiece has a pin hole corresponding to at least one positioning pin.

[0008] By adopting the above technical solution, the engine housing is placed on a rotating worktable, with at least one locating pin inserted into the pin hole of the engine housing, and the engine housing conforming to the locating surface of at least one locating seat. The lifting mechanism is activated to lift one end of the pressure plate, causing the other end of the pressure plate to rotate downwards and press against the workpiece, thus stably placing the engine housing on the rotating worktable. After the engine housing is fixed, the machine tool is instructed by program commands to process one of the machining centers of the engine housing. After processing, the program commands rotate the worktable by an angle, and the machine tool processes another machining center of the engine housing, and so on. After all machining centers of the engine housing are completed, the lifting mechanism descends, releasing the pressure of the pressure plate on the engine housing, the engine housing is removed, and the next engine housing to be processed is installed, starting the next work cycle.

[0009] First, the engine housing is positioned using locating pins, then the engine housing is clamped and fixed using pressure plates. By rotating the worktable, the processing plate is rotated, enabling the engine housing to be processed in three directions at once. This eliminates multiple disassembly and assembly processes and multiple sets of tooling, thereby improving the clamping and fixing efficiency during engine housing processing, and greatly reducing costs and increasing efficiency.

[0010] Optionally, the clamping device further includes a support base, which is located away from the lifting member and within the rotation plane of the pressure plate, and the workpiece can be clamped between the pressure plate and the support base.

[0011] By adopting the above technical solution, the support base supports the engine housing, avoiding damage to the engine housing or the other end of the engine housing being lifted due to excessive pressure from the pressure plate.

[0012] Optionally, the rotating worktable is provided with at least one auxiliary support lifting component, the lifting direction of the lifting end of the auxiliary support lifting component is perpendicular to the rotating worktable, and the lifting end of the auxiliary support lifting component abuts against the workpiece.

[0013] By adopting the above technical solution, it is found that due to the significant height difference on the outer surface of the engine housing, the positioning seat alone is insufficient to support different parts of the outer surface of the engine housing, leading to uneven stress on the engine during machining. By using auxiliary support lifting components to support the outer surface of the engine housing with its significant height difference, the support for the engine housing becomes more balanced and comprehensive, further improving the stability of engine housing machining.

[0014] Optionally, the rotating worktable is further provided with a clamping assembly, which includes two driving members and two clamping plates. The two driving members are fixedly mounted on the rotating worktable, and the two clamping plates are respectively fixed to the drive shafts of the two driving members. The two driving members drive the two clamping plates to rotate in opposite directions to clamp or release the workpiece.

[0015] By adopting the above technical solution, the two driving components drive the two clamping plates to rotate in opposite directions, which can clamp the engine housing and further improve the stability of clamping and fixing the engine housing; the two driving components drive the two clamping plates to rotate in opposite directions, which can release the clamping of the engine housing.

[0016] Optionally, each of the two clamping plates has a snap-fit ​​groove on one of its opposite sides. The snap-fit ​​groove has two openings, with the other opening facing the rotating worktable. The two corners of the workpiece are respectively snapped into the two snap-fit ​​grooves. The driving component is a lifting and rotating platform, and the two driving components drive the clamping plates to move vertically up and down.

[0017] By adopting the above technical solution, after the two clamping plates rotate towards each other and abut against the engine housing, the driving component drives the two clamping plates to descend, so that the two corners of the engine housing are locked in the locking groove, so as to further stabilize and press the engine housing against the rotating worktable, thereby further improving the stability of clamping and fixing the engine housing.

[0018] Optionally, there are at least two positioning pins, with the two positioning pins respectively located close to the two clamping plates, and the opening directions of the two snap-fit ​​grooves respectively corresponding to the two positioning pins being coaxially arranged.

[0019] By adopting the above technical solution, when the two clamping plates hold and press down on the engine housing, the upper side wall of the snap-fit ​​groove can press the engine housing toward the positioning pin, thereby improving the insertion stability of the engine housing and the positioning pin.

[0020] Optionally, the rotating worktable is provided with at least one limiting seat, and at least one of the limiting seats abuts against the side of the workpiece.

[0021] By adopting the above technical solution, when assembling the engine housing on the rotating worktable, the limiting seat can limit the lowering position of the engine housing, thereby improving the assembly efficiency of the engine housing.

[0022] Optionally, the rotating worktable has multiple mounting screw holes for each limiting seat, and the limiting seat can be fixedly installed at different mounting screw holes by bolts.

[0023] By adopting the above technical solution, the installation position of the limit seat can be adjusted by multiple mounting screw holes, so as to adapt to the lowering and assembly of engine housings of different specifications and sizes.

[0024] In summary, this utility model has at least one of the following beneficial technical effects:

[0025] 1. First, the engine housing is positioned using locating pins, and then the engine housing is clamped and fixed using pressure plates. By rotating the worktable, the processing plate is rotated, enabling the engine housing to be processed in three directions at once. This eliminates multiple disassembly and assembly processes and multiple sets of tooling, thereby improving the clamping and fixing efficiency during engine housing processing, and greatly reducing costs and increasing efficiency.

[0026] 2. The support base can support the workpiece, preventing the pressure plate from pressing down too much and causing damage to the engine box or the other end to lift up, thus improving the stability of the engine box being clamped and fixed.

[0027] 3. By using auxiliary support lifting components to adjust the height, support is provided for areas with large height differences on the outer side of the engine housing. This allows for more adaptable and balanced support of the engine housing, improving the stability during engine housing processing and reducing the risk of damage to the housing due to excessive local stress. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the tooling used to demonstrate the machining of the engine housing.

[0029] Figure 2 This is a schematic diagram of the engine housing machining fixture and the engine housing assembly in this utility model.

[0030] Figure 3 yes Figure 1 A magnified structural diagram of part A in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. Rotating worktable; 11. Drive device; 12. Worktable; 121. Mounting screw hole; 13. First mounting seat; 14. Second mounting seat; 2. Lifting ring; 3. Clamping device; 31. Pressure plate; 32. Lifting component; 33. Support seat; 4. Positioning seat; 5. Positioning pin; 6. Auxiliary support lifting component; 7. Clamping assembly; 71. Drive component; 72. Clamping plate; 73. Snap-fit ​​groove; 8. Limiting seat; 9. Engine housing. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0033] This utility model discloses a machining fixture for an engine housing. (Refer to...) Figure 1 and Figure 2The engine block machining fixture includes a rotating worktable 1, a clamping device 3, a clamping assembly 7, a positioning seat 4, and a positioning pin 5. The rotating worktable 1 consists of a drive device 11 and a worktable 12. The worktable 12 is fixed to the drive end of the drive device 11 and is horizontally positioned. The drive device 11 can drive the worktable 12 to rotate horizontally. The clamping device 3, clamping assembly 7, positioning seat 4, and positioning pin 5 are all fixedly mounted on the worktable 12. Two lifting rings 2 are also fixedly connected to the worktable 12 to facilitate lifting and transferring the worktable 12.

[0034] Reference Figure 1 and Figure 2 To accommodate the external structure of the engine housing 9, a first mounting base 13 and a second mounting base 14 are fixedly installed on the worktable 12. The clamping device 3 and one of the positioning pins 5 are fixedly installed on the first mounting base 13, and the clamping assembly 7 and the other two positioning pins 5 are fixedly installed on the second mounting base 14.

[0035] Reference Figure 1 and Figure 2 The number of positioning seats 4 is at least one; in this embodiment, two positioning seats 4 are provided, and each positioning seat 4 has a positioning surface. To accommodate the positioning and support of the engine housing 9, the positioning surfaces of the two positioning seats 4 are inclined, and the engine housing 9 is simultaneously attached to both positioning surfaces. The number of positioning pins 5 is at least one; in this embodiment, three positioning pins 5 are provided. The workpiece has pin holes corresponding to the three positioning pins 5, and the three positioning pins 5 are respectively inserted into the pin holes of the engine.

[0036] Reference Figure 1 and Figure 2 The clamping device 3 includes a pressure plate 31, a lifting member 32, and a support base 33. The lifting member 32 is fixedly mounted on the first mounting base 13. In this embodiment, the lifting member 32 is a cylinder, and the lifting path of the movable end of the lifting member 32 is perpendicular to the worktable 12. The pressure plate 31 is hinged to the first mounting base 13, and the rotation plane of the pressure plate 31 is perpendicular to the worktable 12, and the rotation plane of the pressure plate 31 intersects with the placement plane of the workpiece. The lifting member 32 is located on the side of the pressure plate 31 away from the workpiece from the hinge point, and the movable end of the lifting member 32 can lift the pressure plate 31. The support base 33 is also fixedly mounted on the first mounting base 13. The support base 33 is away from the lifting member 32 and located in the rotation plane of the pressure plate 31, and the workpiece can be clamped between the pressure plate 31 and the support base 33. The support seat 33 can support the workpiece, preventing the pressure plate 31 from pressing down too much and causing damage to the engine housing 9 or the other end to lift up, thus improving the stability of the engine housing 9 being clamped and fixed.

[0037] The engine housing 9 is placed on the worktable 12, with at least one locating pin 5 inserted into the corresponding pin hole of the engine housing 9, and the engine housing 9 conforming to the locating surface of at least one locating seat 4. The lifting mechanism 32 is activated to lift one end of the pressure plate 31, causing the other end of the pressure plate 31 to rotate downwards and press against the workpiece, thus stably placing the engine housing 9 on the worktable 12. After the engine housing 9 is fixed, the machine tool is instructed by program commands to process one of the machining centers of the engine housing 9. After processing, the program commands rotate the worktable 1 by an angle, and the machine tool processes the other machining center of the engine housing 9, and so on. After all machining centers of the engine housing 9 are completed, the lifting mechanism 32 descends, releasing the pressure of the pressure plate 31 on the engine housing 9, the engine housing 9 is removed, and the next engine housing 9 to be processed is reinstalled, starting the next work cycle.

[0038] First, the engine housing 9 is positioned by the positioning pin 5, and then the engine housing 9 is pressed and fixed by the pressure plate 31. By rotating the worktable 1, the processing plate is rotated, so that the engine housing 9 can be processed in three directions at one time. This eliminates multiple disassembly and assembly processes and multiple sets of tooling, thereby improving the clamping and fixing efficiency when processing the engine housing 9, and greatly reducing costs and improving efficiency.

[0039] Because of the significant height difference on the outer surface of the engine housing 9, it is difficult to support different parts of the outer surface of the engine housing 9 using only the positioning seat 4, which would lead to uneven stress on the engine during processing. At least one auxiliary support lifting member 6 is fixedly installed on the worktable 12. In this embodiment, there are five auxiliary support lifting members 6, arranged according to the structural layout of the outer surface of the engine housing 9. The lifting direction of the lifting end of the auxiliary support lifting member 6 is perpendicular to the worktable 12, and the lifting end of the auxiliary support lifting member 6 abuts against the workpiece. By using the auxiliary support lifting members 6 to support the outer surface of the engine housing 9 with its significant height difference, the support for the engine housing 9 becomes more balanced and comprehensive, further improving the stability of processing the engine housing 9.

[0040] Reference Figure 1 and Figure 3To further enhance the stability of clamping and fixing the engine housing 9, a clamping assembly 7 is also provided on the worktable 12. The clamping assembly 7 includes two driving components 71 and two clamping plates 72. Both driving components 71 are fixedly mounted on the second mounting base 14, and one end of each clamping plate 72 is fixed to the drive shaft of the two driving components 71. The driving components 71 are lifting and rotating platforms. The two driving components 71 drive the clamping plates 72 to move vertically up and down, and drive the two clamping plates 72 to rotate in opposite directions to clamp or release the workpiece. Each of the two clamping plates 72 has a snap-fit ​​groove 73 on its opposite side. The snap-fit ​​groove 73 has two openings, with the other opening facing the worktable 12. The two corners of the engine housing 9 are respectively snapped into the two snap-fit ​​grooves 73.

[0041] Two drive members 71 drive two clamping plates 72 to rotate in opposite directions, clamping the engine housing 9 and further improving the stability of clamping and fixing the engine housing 9. When the two drive members 71 drive the two clamping plates 72 to rotate in opposite directions, the clamping of the engine housing 9 can be released. After the two clamping plates 72 rotate in opposite directions and abut against the engine housing 9, the drive members 71 drive the two clamping plates 72 to descend, causing the two corners of the engine housing 9 to engage in the locking grooves 73, further stabilizing and pressing the engine housing 9 against the worktable 12, thereby further improving the stability of clamping and fixing the engine housing 9.

[0042] Reference Figure 1 and Figure 3 Two locating pins 5 are respectively positioned close to two clamping plates 72, and the opening directions of two snap-fit ​​grooves 73 are respectively coaxially positioned with the two locating pins 5. When the two clamping plates 72 clamp and press down on the engine housing 9, the upper sidewall of the snap-fit ​​groove 73 can press the engine housing 9 toward the locating pins 5 to improve the insertion stability of the engine housing 9 and the locating pins 5.

[0043] Reference Figure 1 and Figure 2 To limit the lowering position of the engine housing 9, the worktable 12 is provided with multiple limiting seats 8. The multiple limiting seats 8 are arranged around the installation position of the engine housing 9, and each of the multiple limiting seats 8 abuts against the side of the engine housing 9. The worktable 12 has multiple mounting screw holes 121 corresponding to each limiting seat 8, and the limiting seat 8 can be fixedly installed at different mounting screw holes 121 by bolts.

[0044] When assembling the engine housing 9 onto the worktable 12, the limiting seat 8 can restrict the lowering position of the engine housing 9, thereby improving the assembly efficiency of the engine housing 9. Multiple mounting screw holes 121 can adjust the mounting position of the limiting seat 8 to accommodate engine housings 9 of different sizes for lowering and assembly.

[0045] The implementation principle of the engine housing processing fixture of this utility model embodiment is as follows: The engine housing 9 is placed on the worktable 12, such that at least one locating pin 5 is inserted into the pin hole of the engine housing 9, and the engine housing 9 is in contact with the locating surface of at least one locating seat 4. The lifting member 32 is activated to lift one end of the pressure plate 31, so that the other end of the pressure plate 31 rotates downward and clamps the workpiece. Then, the two driving members 71 are activated to drive the two clamping plates 72 to rotate in opposite directions, which can clamp the engine housing 9, so that the engine housing 9 is stably placed on the worktable 12.

[0046] After the engine housing 9 is fixed in place, the machine tool is instructed by program commands to process one of the machining centers of the engine housing 9. After processing, the program commands rotate the worktable 1 by an angle, and the machine tool processes the other machining center of the engine housing 9, and so on. After all machining centers of the engine housing 9 are completed, the lifting member 32 descends, releasing the pressure plate 31 and clamping plate 72 from the engine housing 9, removing the engine housing 9, and reinstalling the next engine housing 9 to be processed, starting the next work cycle.

[0047] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A machining fixture for an engine housing, characterized in that: The device includes a rotating worktable (1), a clamping device (3) disposed on the rotating worktable (1), at least one positioning seat (4), and at least one positioning pin (5). The clamping device (3) includes a pressure plate (31) disposed on the rotating worktable (1) and a lifting member (32). The middle part of the pressure plate (31) is hinged to the rotating worktable (1). The rotation plane of the pressure plate (31) intersects with the placement plane of the workpiece. The lifting member (32) is located on the side of the pressure plate (31) away from the workpiece. The lifting member (32) is used to lift the pressure plate (31) to make it rotate. The positioning seat (4) is provided with a positioning surface. When the pressure plate (31) clamps the workpiece, the workpiece is in contact with the positioning surface. The workpiece is provided with a pin hole corresponding to at least one positioning pin (5).

2. The engine housing machining fixture according to claim 1, characterized in that: The clamping device (3) also includes a support base (33), which is located away from the lifting member (32) and in the rotation plane of the pressure plate (31). The workpiece can be clamped between the pressure plate (31) and the support base (33).

3. The engine housing machining fixture according to claim 1, characterized in that: At least one auxiliary support lifting component (6) is provided on the rotating worktable (1). The lifting direction of the lifting end of the auxiliary support lifting component (6) is perpendicular to the rotating worktable (1), and the lifting end of the auxiliary support lifting component (6) abuts against the workpiece.

4. The engine housing machining fixture according to claim 1, characterized in that: The rotating worktable (1) is also provided with a clamping assembly (7), which includes two driving members (71) and two clamping plates (72). The two driving members (71) are fixedly disposed on the rotating worktable (1), and the two clamping plates (72) are respectively fixed to the driving shafts of the two driving members (71). The two driving members (71) drive the two clamping plates (72) to rotate in opposite directions to clamp or release the workpiece.

5. The engine housing machining fixture according to claim 4, characterized in that: Each of the two clamping plates (72) has a snap-fit ​​groove (73) on one side opposite to the other. The snap-fit ​​groove (73) has two openings and the other opening faces the rotating worktable (1). The two corners of the workpiece are respectively snapped into the two snap-fit ​​grooves (73). The driving component (71) is a lifting and rotating platform. The two driving components (71) drive the clamping plates (72) to lift vertically.

6. The engine housing machining fixture according to claim 5, characterized in that: There are at least two positioning pins (5), with the two positioning pins (5) respectively located close to the two clamping plates (72). When the two clamping plates (72) clamp the workpiece, the opening directions of the two snap-fit ​​grooves (73) are respectively located on the same straight line as the axis of the two positioning pins (5).

7. The engine housing machining fixture according to claim 1, characterized in that: The rotating worktable (1) is provided with at least one limiting seat (8), and at least one of the limiting seats (8) abuts against the side of the workpiece.

8. The engine housing machining fixture according to claim 1, characterized in that: The rotating worktable (1) has multiple mounting screw holes (121) for each limiting seat (8), and the limiting seat (8) can be fixedly installed at different mounting screw holes (121) by bolts.

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