Engine cylinder bore roughing jig

Abstract

The utility model provides an engine cylinder liner rough machining clamp belongs to the field of machining, solves the technical problem how to carry out efficient positioning and clamping when engine cylinder liner is processed, includes: clamping bottom plate, support pad, equal height pad, guide seat, prevent falling seat, pressing plate seat, positioning seat and push against seat, clamping work surface is along the width direction inclination setting, four corner regions set up support pad, four corner regions and along the length direction both sides middle part set up equal height pad, guide seat is located four sides, higher side vertical setting, lower side vertical setting, length direction both sides are all vertical setting, and all are equipped with adjustable pressure bar, prevent falling seat is located lower side, and prevent falling seat is equipped with adjustable support rod, pressing plate seat is located width direction both sides for pressing cylinder, positioning seat is located width direction lower side and length direction one side, length direction other side, push against seat and positioning seat opposite setting. Have the technical effect that simplifies positioning clamping process, improves processing efficiency and precision.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a rough machining fixture for engine cylinder bores. Background Technology

[0002] In the field of machining, engine cylinder block structures are complex and diverse, with V-shaped cylinder blocks being the most common, where multiple cylinders are typically symmetrically distributed. These cylinder blocks feature unique bore designs, being obliquely distributed with differences in angle between the bores on both sides. This special structure places extremely high demands on positioning and clamping during the machining process.

[0003] In the actual machining operations of engine block cylinder bores, how to achieve efficient positioning and precise clamping has become an urgent technical problem to be solved. Traditional positioning and clamping methods are cumbersome and inefficient when dealing with such complex cylinder bore machining, making it difficult to guarantee machining accuracy and unable to meet the needs of modern large-scale, high-efficiency machining production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a rough machining fixture for engine cylinder bores, which solves the technical problem of how to efficiently position and clamp the cylinder bores during machining of engine cylinder blocks.

[0005] The technical solution adopted in this utility model is: a rough machining fixture for engine cylinder bores, comprising: Clamping base plate, support pad, leveling pad, guide seat, anti-tipping seat, pressure plate seat, positioning seat and push seat; The clamping working surface on the clamping base plate is inclined along the width direction, and the support pad is provided at least in the four corner areas of the clamping working surface, and the equal height pad is provided at least in the four corner areas of the clamping working surface and in the middle areas on both sides along the length direction. The guide seats are located on the four sides of the clamping working surface. Along the width direction of the clamping working surface, the guide seats are vertically arranged on the higher side and perpendicular to the clamping working surface on the lower side. Along the length direction of the clamping working surface, both guide seats are perpendicular to the clamping working surface and are provided with adjustable pressure rods facing the inside of the clamping working surface. The anti-tipping seat is located on the lower side of the clamping working surface, and the anti-tipping seat is provided with an adjustable support rod that faces the inside of the clamping working surface and whose height can be adjusted. The pressure plate seats are located on both sides of the clamping working surface in the width direction for pressing the engine cylinder block; The positioning seat is located on the lower side of the width direction and one side of the length direction of the clamping working surface, and on the other side of the length direction. The push seat is arranged opposite to the positioning seat.

[0006] Optionally, three equal-height pads are provided on each side along the width direction of the clamping working surface, wherein the equal-height pads at both ends of the lower side of the clamping working surface and the equal-height pad in the middle of the higher side of the clamping working surface are adjustable equal-height pads.

[0007] Optionally, the adjustable pressure rod passes through the guide seat via a threaded hole.

[0008] Optionally, the pressure plate seat includes a mounting base, a pressure plate body, a limiting bolt, and a clamping bolt. The pressure plate body has a through-slot and a non-through blind slot, with the through-slot and blind slot having the same direction. One end of the limiting bolt is connected to the mounting base, and the other end abuts against the blind slot and can slide along the blind slot. One end of the clamping bolt is connected to the mounting base, and the other end passes through the long slot and is threaded with a clamping nut. An elastic element is also provided between the mounting base and the pressure plate body.

[0009] Optionally, the position of the contour pad corresponds one-to-one with the pressure plate seat, the top of the contour pad supports the engine cylinder block, and the pressure plate seat presses the engine cylinder block from the top surface.

[0010] Optionally, the equalization pads are provided at both ends and the middle of each side on both sides of the width direction of the clamping working surface; on both sides of the width direction of the clamping working surface, of the two equalization pads in opposite positions, one is an adjustable equalization pad and the other is a regular equalization pad with a fixed height.

[0011] Optionally, the guide seat includes a coarse guide seat connected to the clamping base plate, and a limiting plate detachably connected to the coarse guide seat, the limiting plate facing the inner side of the clamping working surface.

[0012] Optionally, the adjustable leveling pad includes a base and an adjustable block slidably disposed on the base. The tail end of the adjustable block forms a piston structure with the cavity of the base, and the piston structure is connected to the air pipe.

[0013] Optionally, one end of the adjustable support rod is provided with a support head, and the other end is connected to the anti-tipping seat by a thread; and / or, the push seat and the positioning seat are arranged opposite each other on the lower side of the clamping working surface, and on the higher side, a set of guide seats are also provided opposite each other.

[0014] Optionally, the support pad is a nylon pad fixed to the clamping working surface.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: This engine block cylinder bore roughing fixture offers significant advantages. Its inclined clamping surface, combined with support pads and leveling pads at the four corners and the center of the length direction, provides stable support for the cylinder block, ensuring the axis of the machined cylinder bore is vertical and aligned with the machine tool spindle direction. The guide seat, anti-tipping seat, pressure plate seat, positioning seat, and push seat work together to quickly and accurately position and securely clamp the cylinder block, simplifying the positioning and clamping process. This not only significantly reduces machining preparation time and improves machining efficiency but also effectively guarantees the machining accuracy of the cylinder bore. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 A three-dimensional schematic diagram of the engine block clamping state.

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 This is a schematic diagram of the engine block in the clamping state at the end.

[0020] Figure 4 This is a schematic diagram of the clamping force.

[0021] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle.

[0022] Figure 6 for Figure 4 A magnified view of a portion of point C in the middle.

[0023] Figure 7 This is a top view of the vertically clamped working surface.

[0024] Attached reference numerals: Clamping base plate 1, Support pad 2, Equalizing pad 3, Adjustable equalizing pad 3A, Pad 31, Adjustable block 32, Guide seat 4, Limiting plate 41, Coarse guide seat 42, Adjustable pressure rod 43, Anti-tipping seat 5, Adjustable support rod 51, Pressure plate seat 6, Mounting seat 61, Pressure plate body 62, Limiting bolt 63, Tightening bolt 64, Long groove 65, Blind groove 66, Positioning seat 7, Push seat 8, Air pipe 9. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0027] For engine block cylinder bore rough machining fixtures, please refer to the attached document. Figure 1 , Figure 4 and Figure 7 One possible implementation method is as follows: Clamping base plate 1, support pad 2, leveling pad 3, guide seat 4, anti-tipping seat 5, pressure plate seat 6, positioning seat 7, and push seat 8; The clamping working surface on the clamping base plate 1 is inclined along the width direction, and support pads 2 are provided at least in the four corner areas of the clamping working surface, and equal height pads 3 are provided at least in the four corner areas of the clamping working surface and in the middle areas on both sides along the length direction. Guide seats 4 are located on the four sides of the clamping working surface. Along the width direction of the clamping working surface, the guide seats are vertically arranged on the higher side and perpendicular to the clamping working surface on the lower side. Along the length direction of the clamping working surface, both guide seats are perpendicular to the clamping working surface and are equipped with adjustable pressure rods 43 facing the inside of the clamping working surface. The anti-tipping seat 5 is located on the lower side of the clamping working surface, and the anti-tipping seat 5 is provided with an adjustable support rod 51 that faces the inner side of the clamping working surface and whose height can be adjusted. The pressure plate seat 6 is located on both sides of the clamping working surface in the width direction to press the engine cylinder block; The positioning seat 7 is located on the lower side of the width direction and one side of the length direction of the clamping working surface, and on the other side of the length direction. The push seat 8 is set opposite to the positioning seat 7.

[0028] In the above embodiments, the operation process is as follows: Engine block width direction side positioning: The operator hoists in the workpiece, i.e., the engine block, and places it into the clamping working surface through the guide seats 4 for limiting and guiding. Because the clamping working surface is set at an inclination, after placement, the engine block will automatically stick to the lower guide seat 4. This side is also provided with a positioning seat 7 for positioning. Figure 7 (Lower right and lower left corners), positioning seat 7 faces the upper side of the inclined surface; Engine block bottom positioning: The bottom positioning surface of the engine block contacts and is supported by support pad 2 and leveling pad 3. Support pad 2 is made of elastic material; if it is a nylon pad fixed to the clamping working surface, it only serves a supporting function. Leveling pad 3 is made of rigid material, commonly HT200-250 cast iron or 45# steel. The working surface is scraped or ground, achieving an accuracy of 1-40µm. Accuracy is classified from grade 00 to grade 3, with grade 0 being the highest (error only a few tenths of a micrometer) and grade 3 being the lowest, suitable for general factory or workshop processing. In this design, the top surfaces of all leveling pads 3 are flush, used to support and position the bottom surface of the engine block. Engine block lateral positioning along length: By screwing in the push-fit seat 8, the engine block is pushed to the other side, and the other side of the engine block is aligned with the positioning seat 7. Figure 7 Contact and position at the bottom left corner.

[0029] Engine block fixing: The width side, length side, and bottom surface of the engine block are respectively fixed to... Figure 7 After the positioning seats 7 at the lower right and lower left corners, the lower left corner positioning seat 7, and the bottom level pad 3 are accurately positioned, the two guide seats 4 located on both sides of the engine block length direction ( Figure 7 The upper left and upper right corners) are pressed against the two sides of the engine cylinder block along its length by adjustable pressure rods 43, while the bosses on both sides of the engine cylinder block along its width are pressed against each pressure plate seat 6. In addition, since the clamping working surface is inclined, the engine cylinder block is also clamped at an incline. To prevent tipping during processing, the adjustable support rod 51 on the anti-tipping seat 5 supports the engine cylinder block from a higher position.

[0030] In the above scheme, the cylinder bore axis on one side of the engine block is vertical, conforming to the spindle direction of a traditional machining tool. Therefore, machining the cylinder bore can be performed without a machine tool with a special axial arrangement. After machining one side of the cylinder bore, the clamping mechanisms are released, the engine block is lifted, rotated 180° around the vertical axis, lowered back down, and clamped in position to complete the machining of the cylinder bore on the other side of the engine block.

[0031] This engine block cylinder bore rough machining fixture offers numerous advantages. The inclined clamping surface of the clamping base plate 1, combined with the support pads 2 at the four corners and the level pads 3 at the four corners and the middle areas on both sides along the length, provides stable bottom support and precise positioning for the engine block, greatly simplifying the positioning and clamping process. The guide seats 4 are differentiated on different sides along the width direction; one side guides and assists in insertion, while the other side limits and assists in positioning. The adjustable pressure rods 43 on both sides of the guide seats 4 along the length direction accurately guide the cylinder block into place and apply appropriate clamping force. The adjustable support rod 51 of the anti-tipping seat 5 effectively prevents the cylinder block from tipping over, further stabilizing the clamping. The pressure plate seat 6 presses the cylinder block from both sides along the width direction, and the positioning seat 7 and the push seat 8 are positioned opposite each other in the width and length directions to achieve precise positioning. This fixture not only significantly improves clamping efficiency and accuracy, but also has good adaptability to traditional machine tools. It can make the cylinder bore axis on one side of the engine block vertical without large-scale machine tool modification, which is convenient for machining. After machining one side, the cylinder block can be rotated and re-clamped to machine the other side, reducing production costs and improving production efficiency.

[0032] In one possible implementation, see Appendix Figure 7 Three equal-height pads 3 are provided on each side along the width direction of the clamping working surface. Among them, the equal-height pads 3 at both ends of the lower side of the clamping working surface and the equal-height pad 3 in the middle of the higher side of the clamping working surface are adjustable equal-height pads 3A. The positioning surfaces of these equal-height pads 3 are parallel to the clamping working surface.

[0033] Preferably, on both sides of the width direction of the clamping working surface, equal height pads 3 are provided at both ends and the middle of each side; on both sides of the width direction of the clamping working surface, among the two equal height pads 3 in opposite positions, one is an adjustable equal height pad 3A and the other is a regular equal height pad 3 with a fixed height, and the positioning surfaces of these equal height pads 3 are parallel to the clamping working surface.

[0034] Further, see appendix. Figure 6 The adjustable leveling pad 3A includes a base 31 and an adjustable block 32 slidably disposed on the base 31. The tail end of the adjustable block 32 forms a piston structure with the cavity of the base 31. The piston structure is connected to the air pipe 9, which is connected to an air pressure source and a pressure gauge. Under initial pressure, the adjustable block 32 is higher than the leveling surface of the adjustable leveling pad 3A. When the engine block is placed in the clamping working area, the engine block will contact the adjustable blocks 32 of each adjustable leveling pad 3A. As a result, the adjustable blocks 32 will be displaced within the piston structure, causing pressure changes in the corresponding air pipes 9 of each adjustable leveling pad 3A. The leveling accuracy of each adjustable leveling pad 3A can be determined based on the consistency of the pressure changes of each adjustable leveling pad 3A.

[0035] In the above embodiments, the key technical aspect lies in achieving efficient and precise clamping through a unique structural design. The adjustable leveling pad is connected to the air pipe via a piston structure, determining the leveling accuracy based on pressure changes, further improving positioning precision. This fixture significantly improves clamping efficiency and accuracy, has strong adaptability to traditional machine tools, reduces production costs, and increases production efficiency.

[0036] In one possible implementation, see Appendix Figure 7 The adjustable pressure rod 43 passes through the guide seat via a threaded hole. By turning the adjustable pressure rod 43, the guide seats 4 on both sides in the length direction can clamp and limit the engine cylinder block.

[0037] In one possible implementation, see Appendix Figure 6 and Figure 2 The pressure plate seat 6 includes a mounting base 61, a pressure plate body 62, a limiting bolt 63, and a clamping bolt 64. The pressure plate body 62 is provided with a through long groove 65 and a non-through blind groove 66. The long groove 65 and the blind groove 66 are in the same direction. One end of the limiting bolt 63 is connected to the mounting base 61 and the other end abuts against the blind groove 66 and can slide along the blind groove 66. One end of the clamping bolt 64 is connected to the mounting base 61 and the other end passes through the long groove 65 and is threaded with a clamping nut. An elastic element is also provided between the mounting base 61 and the pressure plate body 62.

[0038] Before the engine block is placed, the clamping bolt 64 is loosened, the pressure plate 62 moves backward, the limiting bolt 63 slides along the long groove 65, and the clamping bolt 64 slides along the long groove 65. After the engine block is hoisted in, the pressure plate 62 moves forward, the limiting bolt 63 slides along the long groove 65, and the clamping bolt 64 slides along the long groove 65. The clamping bolt 64 is then tightened, and the head end of the pressure plate 62 presses against the two side edges of the engine block. (See reference...) Figure 2 .

[0039] In one possible implementation, see Appendix Figure 7 The position of the contour pad 3 corresponds one-to-one with the pressure plate seat 6. The top of the contour pad 3 supports the engine cylinder block, and the pressure plate seat 6 presses the engine cylinder block from the top surface.

[0040] The corresponding arrangement of the contour pad 3 and the pressure plate seat 6 ensures that the engine block receives stable and uniform support and clamping during machining. The contour pad 3 is precisely designed according to the shape and size of the engine block, and its height and position are rigorously calibrated to ensure that when working in conjunction with the pressure plate seat 6, the engine block is in the optimal machining position. At the same time, this design effectively avoids machining errors caused by uneven force, improving the accuracy and quality of rough machining of the engine block cylinder bores.

[0041] In one possible implementation, see Appendix Figure 5The guide seat includes a coarse guide seat 42 connected to the clamping base plate 1, and a detachable limiting plate 41 connected to the coarse guide seat 42. The limiting plate 41 faces the inner side of the clamping working surface and is replaceable. Firstly, it allows for flexible replacement of the limiting plate of appropriate specifications according to the size and shape of different engine block models, thus greatly improving the versatility and adaptability of the fixture. Secondly, when the limiting plate is worn or damaged, only a new limiting plate needs to be replaced, without replacing the entire guide seat, which reduces maintenance costs and increases the service life of the fixture.

[0042] In one possible implementation, see Appendix Figure 3 The adjustable support rod 51 has a support head at one end and is connected to the anti-tipping seat 5 by a thread at the other end. The anti-tipping seat 5 is fixed on the clamping base plate 1. By rotating the adjustable support rod 51, the distance between the support head and the engine block can be adjusted to adapt to the clamping requirements of engine blocks of different sizes, effectively ensuring the stability of the engine block during processing and further improving processing accuracy and quality. Alternatively, the push seat 8 and the positioning seat 7 are positioned opposite each other on the lower side of the clamping working surface, and a set of guide seats is also provided opposite each other on the higher side. The structure of the positioning seat 7 can be the same as that of the adjustable leveling pad 3A, only differing in the installation direction. Specifically, the positioning surface of the adjustable leveling pad 3A is parallel to the clamping working surface, while the positioning surface of the positioning seat 7 is vertical and faces the center of the clamping working surface.

[0043] In one possible implementation, see Appendix Figure 5 The support pad 2 is a nylon pad fixed to the clamping working surface, which has a certain elasticity and is wear-resistant.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A rough machining fixture for engine cylinder bores, characterized in that, include: Clamping base plate (1), support pad (2), leveling pad (3), guide seat (4), anti-tipping seat (5), pressure plate seat (6), positioning seat (7) and push seat (8); The clamping working surface on the clamping base plate (1) is inclined along the width direction, and the support pad (2) is provided at least in the four corner areas of the clamping working surface, and the equal height pad (3) is provided at least in the four corner areas of the clamping working surface and in the middle area on both sides along the length direction. The guide seat (4) is provided on the four sides of the clamping working surface. Along the width direction of the clamping working surface, the guide seat is vertically arranged on the higher side and perpendicular to the clamping working surface on the lower side. Along the length direction of the clamping working surface, both guide seats are perpendicular to the clamping working surface and are provided with adjustable pressure rods (43) facing the inside of the clamping working surface. The anti-tipping seat (5) is located on the lower side of the clamping working surface, and the anti-tipping seat (5) is provided with an adjustable support rod (51) that faces the inner side of the clamping working surface and whose height can be adjusted. The pressure plate seat (6) is located on both sides of the clamping working surface in the width direction for pressing the engine cylinder block; The positioning seat (7) is located on the lower side of the width direction and one side of the length direction of the clamping working surface, and on the other side of the length direction. The push seat (8) is arranged opposite to the positioning seat (7).

2. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The contour pads (3) are provided on both sides along the width direction of the clamping working surface, and the contour pads (3) at both ends of the lower side of the clamping working surface and the contour pads (3) in the middle of the higher side of the clamping working surface are adjustable contour pads (3A).

3. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The adjustable pressure rod (43) passes through the guide seat through a threaded hole.

4. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The pressure plate seat (6) includes a mounting base (61), a pressure plate body (62), a limiting bolt (63), and a clamping bolt (64). The pressure plate body (62) is provided with a through long groove (65) and a non-through blind groove (66). The long groove (65) and the blind groove (66) are in the same direction. One end of the limiting bolt (63) is connected to the mounting base (61), and the other end abuts against the blind groove (66) and can slide along the blind groove (66). One end of the clamping bolt (64) is connected to the mounting base (61), and the other end passes through the long groove (65) and is threaded with a clamping nut. An elastic element is also provided between the mounting base (61) and the pressure plate body (62).

5. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The position of the contour pad (3) corresponds one-to-one with the pressure plate seat (6). The top of the contour pad (3) supports the engine cylinder, and the pressure plate seat (6) presses the engine cylinder from the top surface.

6. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: On both sides of the clamping working surface in the width direction, the equal height pads (3) are provided at both ends and the middle of each side; on both sides of the clamping working surface in the width direction, of the two equal height pads (3) in opposite positions, one is an adjustable equal height pad (3A) and the other is a regular equal height pad (3) with a fixed height.

7. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The guide seat includes a coarse guide seat (42) connected to the clamping base plate (1), and a limiting plate (41) detachably connected to the coarse guide seat (42), the limiting plate (41) facing the inside of the clamping working surface.

8. The rough machining fixture for engine cylinder bores as described in claim 2 or 6, characterized in that: The adjustable leveling pad (3A) includes a pad (31) and an adjustable block (32) slidably disposed on the pad (31). The tail end of the adjustable block (32) forms a piston structure with the cavity of the pad (31), and the piston structure is connected to the air pipe (9).

9. The rough machining fixture for engine cylinder bores as described in claim 1, characterized in that: The adjustable support rod has a support head at one end and is connected to the anti-tipping seat (5) by a thread at the other end; And / or, the push seat (8) and the positioning seat (7) are respectively arranged on the lower side of the clamping working surface, and on the higher side, a set of guide seats are also respectively arranged.

10. The engine block cylinder bore roughing fixture as described in claim 1, characterized in that: The support pad (2) is a nylon pad fixed to the clamping working surface.

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