Engine cylinder block cylinder surface semi-finishing clamp

Abstract

The utility model provides an engine cylinder liner cylinder surface semi-finishing fixture belongs to the field of machining, solves how to carry out efficient positioning and clamping problem when engine cylinder liner cylinder surface processing, including clamping bottom plate, support pad, equal height pad, guide seat, prevent falling seat, pressing plate seat, positioning seat and push seat, clamping bottom plate's clamping work surface is obliquely arranged, four corners set up support pad, four corners and length direction middle part set up equal height pad, guide seat is located four sides, higher side is vertically arranged, lower side is vertically arranged, length direction both sides guide seat are perpendicular, and guide seat is towards inside and is equipped with adjustable pressure lever, prevent falling seat is located lower side, and adjustable support rod who has towards inside and can adjust height is equipped on it, pressing plate seat is located width direction both sides, positioning seat and push seat are opposite and are located central area along length direction, and push seat can push cylinder to positioning seat and press tightly. 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 semi-finishing fixture for engine cylinder block surfaces. Background Technology

[0002] As a core component of the engine, the cylinder block often employs a V-shaped architecture design, resulting in a complex structure and extremely high machining precision requirements. To ensure that the dimensions and geometric tolerances of various parts of the cylinder block meet standards, the internal center of the cylinder block must be used as a reference point during semi-finishing or finishing. This places stringent demands on the stability and accuracy of positioning and clamping. In traditional machining methods, due to the large size and irregular structure of the cylinder block, the design of the positioning reference and clamping method directly affects the machining quality. If the reference point is not selected properly or the clamping is not properly applied, it can easily lead to insufficient machining accuracy of the cylinder surface, thereby affecting the overall performance of the engine.

[0003] In existing technologies, the machining of engine cylinder blocks and cylinder surfaces generally faces the challenge of low positioning and clamping efficiency. Due to the complex shape of the cylinder block and the central location of the reference surface, traditional fixtures require multiple adjustments to achieve positioning. The clamping process is cumbersome and prone to cumulative errors, making it difficult to simultaneously meet the requirements of high-efficiency machining and high precision. Utility Model Content

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

[0005] The technical solution adopted in this utility model is: a semi-finishing fixture for engine cylinder block surface, 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 and the push seat are arranged opposite each other along the length of the clamping working surface and are located in the central area. The push seat can push and press the cylinder body against the positioning seat. Positioning seats 7 are also provided at both ends of the lower side of the clamping working surface in the width direction.

[0006] Optionally, the push-back seat includes a seat body, a pressing finger, and a control torsion bar. The lower end of the pressing finger is hinged to the seat body and can be rotated toward the positioning seat. One end of the control torsion bar is hinged to the pressing finger, and the other end passes through the threaded hole of the seat body and is connected to the edge of the clamping base plate.

[0007] 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.

[0008] Optionally, the adjustable pressure rod passes through the guide seat via a threaded hole.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Optionally, one end of the adjustable pressure rod is provided with a support head, and the other end is connected to the anti-tipping seat by a thread; and / or, 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 surface semi-finishing fixture significantly improves machining efficiency through innovative structural design. The inclined clamping base plate, combined with multi-area support pads and leveling pads, can quickly adapt to irregular cylinder block shapes and achieve stable support. The guide seat and anti-tipping seat form multi-dimensional limits through adjustable pressure rods and support rods, ensuring precise cylinder block positioning. The positioning seat and push-fit seat work together to achieve rapid push-fit clamping, simplifying the clamping process. The overall solution effectively reduces clamping and adjustment time, minimizes human error, and improves cylinder surface machining accuracy and consistency, combining high efficiency and reliability. 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 This is a schematic diagram of the three-dimensional state of the fixture and cylinder.

[0018] Figure 2 This is a side view of the fixture and cylinder.

[0019] Figure 3 This is a three-dimensional schematic diagram of the fixture.

[0020] Figure 4 This is a schematic diagram of the fixture from another perspective in three dimensions.

[0021] Figure 5 for Figure 3 A magnified view of a portion of point A in the middle.

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

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

[0024] Figure 8 This is a partial schematic diagram of the positioning seat and the push seat.

[0025] Reference numerals in the attached drawings: clamping base plate 1, support pad 2, leveling pad 3, adjustable leveling pad 3A, pad seat 31, adjustable block 32, 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, clamping bolt 64, long groove 65, blind groove 66, positioning seat 7, push seat 8, pressing finger 81, control torsion rod 82, air pipe 9. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] For the engine block cylinder surface semi-finishing fixture, 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, 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 are located on all four sides of the clamping working surface. Along the width 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 of the clamping working surface, both guide seats are perpendicular to the clamping working surface and each is equipped with an adjustable pressure rod 43 facing the inside of the clamping working surface. The adjustable pressure rod 43 passes through the guide seat through a threaded hole and can move axially when screwed. 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; Positioning seat 7 and push seat 8 are arranged opposite each other along the length of the clamping working surface and are located in the central area. Push seat 8 can push and press the cylinder body against positioning seat 7. Positioning seats 7 are also provided at both ends of the lower side of the clamping working surface in the width direction. The positioning surfaces of these two positioning seats 7 face the middle of the clamping working surface.

[0029] Further, see appendix. Figure 8 The push seat 8 includes a seat body, a pressing finger 81 and a control torsion bar 82. The lower end of the pressing finger 81 is hinged to the seat body and can be flipped toward the positioning seat 7. One end of the control torsion bar 82 is hinged to the pressing finger 81, and the other end passes through the threaded hole of the seat body and is connected to the edge of the clamping base plate 1.

[0030] 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 (bottom right and bottom left corners) 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 length direction positioning: In this step, due to the semi-finishing or finishing process, the requirements for the positioning reference are higher, and the end face of the engine block along its length cannot be used for positioning. According to the process requirements, the positioning reference for this step is the center face of the engine block along its length. The engine block is composed of a series of cavities, with partition plates between the connected cavities. The partition plate at the very center of the engine block is used as the positioning reference. After the engine is hoisted in, the positioning seat 7 and the push seat 8 are covered by the engine block. The positioning seat 7 and the push seat 8 are located in two adjacent cavities in the central area of ​​the engine block, separated by the partition plates of these two cavities. By turning the control torsion rod 82 of the push seat 8, the control torsion rod 82 will move axially, thereby causing the pressing finger 81 to rotate, thus pushing the engine block (partition plate) towards the positioning seat 7, thereby positioning and initially clamping the partition plate of the engine block with the positioning seat 7. Engine block fixing: The width side, length center, and bottom surface of the engine block are respectively fixed to... Figure 7 After the lower positioning seat 7, the middle positioning seat 7, the push seat 8, 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.

[0031] In the above scheme, the inclined clamping working surface ensures that the cylinder bore axis on one side of the engine block is vertical, and the corresponding cylinder bore surface is horizontal, which conforms to the spindle direction of traditional machining tools. When machining the cylinder bore and cylinder surface, such as grinding the cylinder surface, no special axially arranged grinding machine is required. After machining one side of the cylinder bore is completed, the clamping mechanisms are released, the engine block is lifted and rotated 180° around the vertical axis, and then the engine block is lowered and clamped again to complete the machining of the cylinder bore and cylinder surface on the other side of the engine block.

[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.

[0033] In one possible implementation, leveling pads 3 are provided at both ends and the middle of each side along the width of the clamping working surface; of the two leveling pads 3 positioned opposite each other on both sides along the width of the clamping working surface, one is an adjustable leveling pad 3A, and the other is a fixed-height ordinary leveling pad 3. (See appendix) Figure 5 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.

[0034] The structure of the center positioning seat 7 can be the same as that of the adjustable leveling pad 3A, the difference being the installation method. When the adjustable leveling pad 3A is used to support the bottom of the engine block, the sliding direction of the adjustable block 32 of the adjustable leveling pad 3A is towards the bottom of the engine block. The function of the center positioning seat 7 is to center the engine block from the middle through the cylinder block partition plate in the central area of ​​the engine block. Therefore, if the center positioning seat 7 adopts the same structure as the adjustable leveling pad 3A, the adjustable block 32 of the center positioning seat 7 should face the push seat 8.

[0035] In one possible implementation, see Appendix Figure 5The 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.

[0036] 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 1 .

[0037] In one possible implementation, see Appendix Figure 4 The contour pads 3 and pressure plate seats 6 are positioned one-to-one. The top of the contour pads 3 supports the engine block, and the pressure plate seats 6 press the engine block against the top surface. This ensures that the engine block receives stable and uniform support and pressure during machining. The height and position of the contour pads 3 are strictly calibrated to ensure that the engine block is in the optimal machining position when working in conjunction with the pressure plate seats 6. 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.

[0038] In one possible implementation, see Appendix Figure 4 The 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, with the limiting plate 41 facing the inner side of the clamping working surface. Firstly, it allows for flexible replacement of the limiting plate of appropriate specifications according to the size and shape of different engine cylinder blocks, 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.

[0039] In one possible implementation, see Appendix Figure 2 One end of the adjustable support rod 51 is provided with a support head 51, and the other end is connected to the anti-tipping seat 5 by a thread. By rotating the adjustable support rod 51, the distance between the support head and the engine cylinder block can be adjusted to adapt to the clamping requirements of engine cylinder blocks of different sizes, support the engine cylinder block, ensure the stability of the engine cylinder block during processing, and prevent tipping; and / or, the support pad 2 is a nylon pad fixed to the clamping working surface.

[0040] 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 semi-finishing fixture for engine cylinder block surfaces, 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 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 (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) and the push seat (8) are arranged opposite to each other along the length direction of the clamping working surface and are located in the central area. The push seat (8) can push the cylinder body against the positioning seat (7) and press it tightly. Positioning seats (7) are also provided at both ends of the lower side of the clamping working surface in the width direction.

2. The semi-finishing fixture for engine cylinder block surfaces as described in claim 1, characterized in that: The push seat (8) includes a seat body, a pressing finger (81) and a control torsion bar (82). The lower end of the pressing finger (81) is hinged to the seat body and can be flipped toward the positioning seat (7). One end of the control torsion bar (82) is hinged to the pressing finger (81), and the other end passes through the threaded hole of the seat body and is connected to the edge of the clamping base plate (1).

3. The semi-finishing fixture for engine cylinder block surfaces 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).

4. The semi-finishing fixture for engine cylinder block surfaces as described in claim 1, characterized in that: The adjustable pressure rod (43) passes through the guide seat through a threaded hole.

5. The semi-finishing fixture for engine cylinder block surfaces 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).

6. The semi-finishing fixture for engine cylinder block surfaces 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.

7. The semi-finishing fixture for engine cylinder block surfaces as described in claim 1, characterized in that: On both sides of the width direction of the clamping working surface, the 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, 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.

8. The semi-finishing fixture for engine cylinder block surfaces 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.

9. The semi-finishing fixture for engine cylinder block surfaces as described in claim 3, 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).

10. The semi-finishing fixture for engine cylinder block surfaces as described in claim 1, characterized in that: The adjustable pressure rod (43) 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 support pad (2) is a nylon pad fixed to the clamping working surface.

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