Cylinder processing fixture

Abstract

The utility model provides a kind of cylinder body processing fixture, belong to machining technical field.It solves the existing cylinder body processing fixture only fixed cylinder body single attitude, difficult to complete multi-angle, multi-position processing task in one clamping, lead to low processing efficiency, big repeat positioning error and other technical problems.This cylinder body processing fixture includes workbench, workbench is provided with rotary table and tailstock, rotary table and tailstock are fixedly connected with fixed platform between, fixed platform two sides are provided with installation slot, fixed platform upper end is fixedly equipped with fixed frame, fixed frame is provided with fixed cavity for accommodating cylinder body workpiece, workbench is also provided with clamping device, clamping device penetrates fixed frame and acts on cylinder body workpiece to clamp it fixedly.The utility model is combined by rotary table and fixed platform with installation slot and retreat slot, realize workpiece multidirectional processing, complete multiple processes in one clamping, improve processing efficiency, ensure processing accuracy;Guide rod ensures that it is pressed tightly smoothly;Strengthen structure enhances rigidity.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and specifically refers to a cylinder block machining fixture. Background Technology

[0002] The cylinder block in a plunger pump is a key component of the pump system. Its complex structure typically includes multiple holes and mounting surfaces in different directions and angles, requiring high machining precision. Currently, the machining process for plunger pump cylinder blocks often involves drilling and milling holes in multiple directions, such as top, bottom, left, and right. Traditional fixtures can usually only fix the cylinder block in a single position, making it difficult to complete multi-angle, multi-position machining tasks in a single setup. This results in low machining efficiency, large repeatability errors, and negatively impacts product quality.

[0003] In existing technologies, such as the engine cylinder block oblique hole machining fixture disclosed in Chinese invention patent CN109227165A, although it can achieve a certain angle of tilting machining by adjusting the support block, its structure is mainly suitable for oblique hole machining on the upper end face of the cylinder block, and cannot meet the complex machining requirements of multiple directions and multiple holes in the piston pump cylinder block. If machining is required on the front and rear side walls of the cylinder block or in other directions, the fixture must be replaced or re-clamped, which not only increases auxiliary time, but also easily introduces cumulative errors due to multiple clamping, affecting machining accuracy and consistency.

[0004] Furthermore, plunger pump cylinder bodies typically have multiple connection holes, mounting seats, and reinforcing ribs, making it difficult for traditional fixtures to achieve comprehensive and stable multi-point positioning and clamping. This can easily lead to vibration or displacement during machining, affecting hole position accuracy and surface quality. Therefore, there is an urgent need for a specialized fixture that can adapt to the multi-hole structure of plunger pump cylinder bodies and achieve multi-angle, multi-station machining in a single setup to improve machining efficiency and ensure machining accuracy. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cylinder block machining fixture.

[0006] The objective of this utility model can be achieved through the following technical solution: A cylinder block machining fixture includes a worktable, on which a turntable and a tailstock are provided. A fixed platform is fixedly connected between the turntable and the tailstock. At least one inwardly recessed mounting groove is provided on both sides of the fixed platform. A fixed frame is fixedly provided on the upper end face of the fixed platform. A fixed cavity is provided on the fixed frame in the vertical direction opposite to the mounting groove. The fixed cavity is used to accommodate the cylinder block workpiece. A clamping device is also provided on the worktable. The clamping device passes through the fixed frame and acts on the cylinder block workpiece to clamp and fix it.

[0007] The cylinder block workpiece is placed into the fixed cavity of the fixed frame, which is located on the side of the fixed frame. The cylinder block workpiece is essentially suspended on the side of the fixed frame, and then the clamping device presses and fixes the cylinder block workpiece towards the fixed cavity. Since the entire fixture is mounted on a worktable such as a CNC machine tool worktable via a turntable, the turntable can rotate the entire fixture and workpiece 360 ​​degrees. Combined with the clearance space provided by the mounting slots on both sides of the fixed table, the machine tool tool can approach and process the cylinder block workpiece from multiple directions, including top, bottom, left, right, front, and back, greatly reducing the number of clamping operations, thereby improving processing efficiency and ensuring processing accuracy.

[0008] Furthermore, the fixed platform is also provided with an inwardly recessed relief groove. The opening area of ​​the relief groove covers the mounting groove and is located on opposite sides of the mounting groove, respectively, to allow the processing unit to pass through. The width and length of the relief groove are both greater than the mounting groove, providing sufficient clearance space for processing the outer circular stepped portion and the first lug of the cylinder workpiece.

[0009] Furthermore, the lower end of the fixed platform is provided with at least one reinforcing strip protruding downwards, and reinforcing blocks are provided on both sides of the reinforcing strip, with the reinforcing blocks extending from the side of the reinforcing strip toward the bottom of the recess groove.

[0010] Furthermore, the mounting groove is U-shaped, with through semi-circular holes on both side walls of its open end. These semi-circular holes are coaxially aligned with the pre-machined fixing holes on the cylinder workpiece. The pre-machined fixing holes are located on the first lug, and the diameter of the semi-circular holes is larger than that of the pre-machined fixing holes, allowing for the pre-machined fixing holes to be machined in a single clamping operation, thereby improving machining efficiency and ensuring machining accuracy.

[0011] Furthermore, the fixing cavity is U-shaped, with a first fixing block and a second fixing block protruding from its bottom wall along the opening direction; the upper ends of the first fixing block and the second fixing block are recessed together, forming a first arc-shaped positioning groove; the lower end of the second fixing block is recessed separately to form a second arc-shaped positioning groove; a positioning protrusion is formed between the first arc-shaped positioning groove and the second arc-shaped positioning groove. This better fixes the cylinder workpiece axially.

[0012] Furthermore, the clamping device includes a driving component, a driving rod driven by the driving component, and a clamping block fixed to the end of the driving rod; the fixing frame has a corresponding mounting hole through which the driving rod passes; the driving component can drive the driving rod to extend and retract, thereby causing the clamping block to perform clamping or loosening movements relative to the cylinder workpiece. This radially fixes the cylinder workpiece.

[0013] Furthermore, the lower end of the clamping block is provided with a third positioning groove, which, together with the second arc-shaped positioning groove on the fixing block, defines a complete first lug mounting cavity for accommodating and positioning the first lug of the cylinder workpiece. The cylinder workpiece will not shift no matter where it rotates, improving processing efficiency and ensuring processing accuracy.

[0014] Furthermore, the fixing bracket has a fourth positioning groove recessed inward at the upper part of the fixing cavity, and the upper end of the clamping block has a fifth positioning groove recessed. The fourth and fifth positioning grooves together define a second lug mounting cavity for accommodating and positioning the second lug of the cylinder workpiece. The cylinder workpiece will not shift no matter where it is rotated, improving processing efficiency and ensuring processing accuracy.

[0015] Furthermore, the fixing frame is provided with a guide hole parallel to the axis of the mounting hole, and a guide rod is slidably connected in the guide hole. One end of the guide rod is fixedly connected to a clamping block. This allows the clamping block to be pressed onto the cylinder workpiece more quickly and stably.

[0016] Compared with existing technologies, the technical advantages of this utility model are as follows: 1. By combining a turntable with a fixed table equipped with mounting and clearance slots, the turntable can rotate 360 ​​degrees, allowing the workpiece to be in any machining posture. The fixed table provides ample clearance space for the machine tool, enabling the tool to approach and perform drilling, milling, and other operations from multiple directions, including top, bottom, left, right, front, and back. This overcomes the drawbacks of traditional fixtures requiring multiple replacements and re-clampings, enabling the completion of multi-process and multi-hole clamping of complex cylinder parts in a single setup, thereby improving processing efficiency and ensuring processing accuracy. 2. The guide rod ensures the smooth and precise movement of the clamping block, preventing skewing. 3. The reinforcing strips and reinforcing blocks effectively enhance the rigidity and strength of the fixture body. Attached Figure Description

[0017] Figure 1 This is a perspective view of the utility model.

[0018] Figure 2 This is a partial perspective view of this utility model.

[0019] Figure 3 This is a perspective view of the fixed platform of this utility model.

[0020] Figure 4 This is a three-dimensional view of the fixing frame of this utility model.

[0021] Figure 5 This is a perspective view of the clamping device of this utility model.

[0022] Figure 6 This is a three-dimensional view of the cylinder body workpiece of this utility model.

[0023] Drawing number markings: 1. Worktable; 2. Turntable; 3. Tailstock; 4. Fixed platform; 41. Mounting groove; 42. Recessed groove; 43. Reinforcing strip; 44. Reinforcing block; 411. Semicircular hole; 5. Fixing frame; 51. Fixing cavity; 52. Mounting hole; 53. Guide hole; 54. Guide rod; 511. First fixing block; 512. Second fixing block; 513. First arc-shaped positioning groove; 514. Second arc-shaped positioning groove; 515. Positioning protrusion; 516. Fourth positioning groove; 6. Clamping device; 61. Driving component; 62. Driving rod; 63. Pressing block; 631. Third positioning groove; 632. Fifth positioning groove; 100. Cylinder body workpiece; 101. First lug; 102. Pre-machined fixing hole; 103. Second lug; 104. First channel; 105. Second channel. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined 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 are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1 to 6 As shown, the present invention provides a cylinder block machining fixture, including a horizontally arranged worktable 1. This worktable 1 is typically a CNC machine tool worktable. A rotary table 2 and a tailstock 3 are arranged on the worktable 1. The rotary table 2 is preferably a CNC rotary table capable of precise 360-degree rotation. A fixed platform 4 is fixedly connected between the rotary table 2 and the tailstock 3.

[0027] The main body of the mounting platform 4 is a solid, long plate-like structure, with at least one inwardly recessed U-shaped mounting groove 41 on each side. A mounting bracket 5 is bolted to the upper end face of the mounting platform 4. The mounting bracket 5 has a U-shaped fixing cavity 51 in the vertical direction opposite to the mounting groove 41, which is used to accommodate the cylinder workpiece 100 of the plunger pump. The openings of the mounting groove 41 and the fixing cavity 51 both face outwards, so there is no obstruction in their vertical direction.

[0028] To provide more clearance for the machine tool cutting tool, a recessed relief groove 42 is provided on the fixed table 4 at the lower end of the mounting groove 41. The area of ​​the relief groove 42 covers the mounting groove 41, and its width and length are both greater than the mounting groove 41, allowing the cutting tool to smoothly approach and machine the first channel 104 and the outer cylindrical step portion of the cylinder workpiece 100. The axis of the second channel 105 is perpendicular to the axis of the first channel 104, and the second channel 105 faces outward, allowing the cutting tool to smoothly approach and machine.

[0029] To enhance the overall rigidity and stability of the fixture and prevent vibration during processing, a longitudinal reinforcing strip 43 is provided protruding downwards from the lower end of the fixed table 4. Triangular reinforcing blocks 44 are also formed on both sides of the reinforcing strip 43, extending from the side of the reinforcing strip 43 towards the bottom of the relief groove 42 to form effective support.

[0030] On the two side walls of the opening end of the U-shaped mounting groove 41, there are corresponding through semi-circular holes 411. When the cylinder workpiece 100 is installed in place, the two semi-circular holes 411 are coaxially aligned with the pre-machined fixing hole 102 of the first lug 101 on the cylinder workpiece 100, and the diameter of the semi-circular holes 411 is slightly larger than the design diameter of the pre-machined fixing hole 102, so that the tool can complete the machining of the hole in one clamping.

[0031] On the bottom wall of the fixing cavity 51, a first fixing block 511 and a second fixing block 512 are protruding along its opening direction. Two of each of the first fixing blocks 511 and the second fixing block 512 are located on either side of the fixing cavity 51. The upper ends of the first fixing blocks 511 and the second fixing blocks 512 are recessed together, forming a first arc-shaped positioning groove 513, used to position the outer periphery of the first channel 104 of the cylinder workpiece 100. The lower end of the second fixing block 512 is recessed separately to form a second arc-shaped positioning groove 514, used to position the root of the first lug 101 of the cylinder workpiece 100. Between the first arc-shaped positioning groove 513 and the second arc-shaped positioning groove 514, a positioning protrusion 515 is naturally formed, which can be engaged with the corresponding recess of the cylinder workpiece 100 to achieve axial positioning.

[0032] A clamping device 6 is also provided on the worktable 1. The clamping device 6 includes a driving component 61 fixed on the worktable 1 or the fixed platform 4, a driving rod 62 driven by the driving component 61, and a clamping block 63 fixed to the end of the driving rod 62. The driving component 61 is such as a cylinder or a hydraulic cylinder. The fixed frame 5 has a corresponding mounting hole 52, through which the driving rod 62 passes horizontally. The driving component 61 can drive the driving rod 62 to extend and retract, thereby causing the clamping block 63 to perform clamping or releasing movements relative to the cylinder workpiece 100.

[0033] The lower end of the clamping block 63 is provided with a third positioning groove 631. When the clamping block 63 is clamped, the third positioning groove 631 and the second arc-shaped positioning groove 514 on the fixing frame 5 together define a complete first lug mounting cavity. The fixing frame 5 also has a sixth mounting groove on the side of the second arc-shaped positioning groove 514. The second arc-shaped positioning groove 514 and the sixth mounting groove are connected. The sixth mounting groove is arranged opposite to the third positioning groove 631. The second arc-shaped positioning groove 514, the sixth mounting groove and the third positioning groove 631 together form the first lug mounting cavity, which firmly accommodates and positions the first lug 101 of the cylinder workpiece 100.

[0034] Meanwhile, on the fixing frame 5, a fourth positioning groove 516 is recessed inward at the upper part of the fixing cavity 51. At the upper end of the clamping block 63, a fifth positioning groove 632 is correspondingly recessed. When the clamping block 63 is pressed, the fourth positioning groove 516 and the fifth positioning groove 632 together define a second lug mounting cavity for accommodating and positioning the second lug 103 on the upper part of the cylinder workpiece 100.

[0035] To ensure smooth movement of the clamping block 63 and prevent it from rotating or tilting, a guide hole 53 parallel to the axis of the mounting hole 52 is provided on the fixing frame 5. A guide rod 54 is slidably connected inside the guide hole 53, and one end of the guide rod 54 is fixedly connected to the clamping block 63.

[0036] The working process of this utility model is as follows:

[0037] Clamping: Activate the drive unit 61, causing the drive rod 62 to retract, which in turn moves the clamping block 63 away from the fixed cavity 51 of the fixing frame 5. Place the cylinder workpiece 100 into the fixed cavity 51, positioning its neck in the first arc-shaped positioning groove 513, the first lug 101 in the second arc-shaped positioning groove 514, and the second lug 103 in the fourth positioning groove 516. Then, the drive unit 61 pushes the drive rod 62 and the clamping block 63 forward. Guided by the guide rod 54, the clamping block 63 smoothly clamps the cylinder workpiece 100 into the fixed cavity 51. At this time, the first lug 101 is completely enclosed in the first lug mounting cavity, and the second lug 103 is completely enclosed in the second lug mounting cavity.

[0038] Machining: The CNC program controls the rotation of the rotary table 2, rotating the fixture together with the cylinder workpiece 100 to the required machining angle. The mounting slots 41 and the clearance slots 42 on both sides of the fixed table 4 provide ample space for the tool to approach and avoid, so that machining in multiple directions such as up, down, left, right, front and back can be completed in one clamping.

[0039] Disassembly: After all processes are completed, the drive component 61 drives the clamping block 63 to loosen, and the processed cylinder workpiece 100 can be removed.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A cylinder block machining fixture, comprising a worktable (1), wherein a turntable (2) and a tailstock (3) are provided on the worktable (1), and a fixed platform (4) is fixedly connected between the turntable (2) and the tailstock (3), characterized in that: The fixed platform (4) has at least one inwardly recessed mounting groove (41) on both sides; a fixed frame (5) is fixedly provided on the upper end surface of the fixed platform (4), and a fixed cavity (51) is provided on the fixed frame (5) in the vertical direction opposite to the mounting groove (41), and the fixed cavity (51) is used to accommodate the cylinder workpiece (100); a clamping device (6) is also provided on the worktable (1), and the clamping device (6) passes through the fixed frame (5) and acts on the cylinder workpiece (100) to clamp and fix it.

2. The cylinder block machining fixture according to claim 1, characterized in that: The fixed platform (4) is also provided with an inwardly recessed relief groove (42). The opening area of ​​the relief groove (42) covers the mounting groove (41) and is located on opposite sides of the mounting groove (41) with the cylinder workpiece (100) so that the processing unit can pass through.

3. A cylinder block machining fixture according to claim 2, characterized in that: The fixed platform (4) has at least one reinforcing strip (43) protruding downwards at its lower end. Reinforcing blocks (44) are also provided on both sides of the reinforcing strip (43). The reinforcing blocks (44) extend from the side of the reinforcing strip (43) to the bottom of the recess groove (42).

4. A cylinder block machining fixture according to claim 1, characterized in that: The mounting groove (41) is U-shaped, and a through semi-circular hole (411) is provided on both side walls of its opening end. The semi-circular hole (411) is coaxially aligned with the pre-machined fixing hole (102) on the cylinder workpiece (100).

5. A cylinder block machining fixture according to any one of claims 1 to 4, characterized in that: The fixing cavity (51) is U-shaped, and a first fixing block (511) and a second fixing block (512) are protruding on its bottom wall along the opening direction; the upper ends of the first fixing block (511) and the second fixing block (512) are recessed together to form a first arc-shaped positioning groove (513); the lower end of the second fixing block (512) is recessed separately to form a second arc-shaped positioning groove (514); a positioning protrusion (515) is formed between the first arc-shaped positioning groove (513) and the second arc-shaped positioning groove (514).

6. A cylinder block machining fixture according to claim 5, characterized in that: The clamping device (6) includes a driving member (61), a driving rod (62) driven by the driving member (61), and a clamping block (63) fixed to the end of the driving rod (62); the fixing frame (5) is provided with a mounting hole (52), through which the driving rod (62) passes; the driving member (61) can drive the driving rod (62) to extend and retract, thereby driving the clamping block (63) to perform clamping or loosening movements relative to the cylinder workpiece (100).

7. A cylinder block machining fixture according to claim 6, characterized in that: The lower end of the clamping block (63) is provided with a third positioning groove (631), which together with the second arc-shaped positioning groove (514) on the fixing block defines a complete first lug mounting cavity for accommodating and positioning the first lug (101) of the cylinder workpiece (100).

8. A cylinder block machining fixture according to claim 6, characterized in that: The fixing frame (5) is recessed inward at the upper part of the fixing cavity (51) with a fourth positioning groove (516), and the upper end of the clamping block (63) is recessed with a fifth positioning groove (632). The fourth positioning groove (516) and the fifth positioning groove (632) together define a second lug mounting cavity for accommodating and positioning the second lug (103) of the cylinder workpiece (100).

9. A cylinder block machining fixture according to claim 6, characterized in that: The fixing frame (5) is provided with a guide hole (53) parallel to the axis of the mounting hole (52). A guide rod (54) is slidably connected in the guide hole (53), and a clamping block (63) is fixedly connected to one end of the guide rod (54).

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