Engine cylinder block machining clamp

Abstract

The utility model provides an engine cylinder block machining clamp which comprises a fixing bottom plate, a clamping device and a clamping device. The upper surface of the fixing bottom plate is at least provided with two positioning and fixing devices. Each positioning and fixing device can be clamped and fixed in a cylinder hole of the cylinder body; each positioning and fixing device comprises a tensioning component, a locking component and a positioning component; the top of the positioning part is integrally connected to the tensioning part, and the bottom of the positioning part is inserted into a positioning hole formed in the upper surface of the fixed bottom plate; the tensioning component can be inserted into a cylinder hole in the cylinder body, and the tensioning component is matched with the locking component to clamp and fix the cylinder body on the tensioning component. According to the utility model, the processing procedures are reduced, the processing precision of the cylinder body is improved, and the labor cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of engine cylinder block fixtures, and in particular to an engine cylinder block machining fixture. Background Art

[0002] Currently, during the research and development and trial production of the inline four-cylinder engine block, due to the structural characteristics of the cylinder block and the limitations of existing technical conditions, the cylinder block needs to be repeatedly clamped three times to complete all processing content. Since there are no pressure points around the top surface of the cylinder body and it cannot be clamped, the top surface and the surrounding surfaces of the cylinder body are processed by the first clamping, and then the cylinder body is clamped for the second time to complete the bottom surface processing of the cylinder body. After the processing is completed, the cylinder hole on the top surface is finally clamped for the third time to perform fine processing; because the three clampings will first lead to the dimensional accuracy of some key dimensions between the various surfaces of the cylinder body to be easily out of tolerance and unstable; there are problems such as the dispersion of processing procedures, high workload of operators and inspection and measurement personnel, low processing efficiency and machine tool utilization rate; secondly, since the cylinder hole on the top surface is the core key dimension of the engine, the cylinder hole can only be finely processed after the processing of other elements is completed, among which the bottom surface and the surrounding surfaces of the cylinder body account for more than 85% of the total processing content of the cylinder body, and in the process of the first clamping and the second clamping, it is very easy to cause scratches on the bottom surface and the surrounding surfaces of the cylinder body, affecting the service life of the cylinder body; therefore, how to reduce the number of clamping times of the engine while realizing the processing of the bottom surface and the surrounding surfaces of the cylinder body in one clamping is a problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of this application is to provide an engine cylinder block processing fixture, which overcomes the defects mentioned in the background technology. The specific solution is as follows:

[0004] The purpose of this application is to provide an engine cylinder block processing fixture that can solve at least one of the technical problems mentioned above.

[0005] The specific plan is as follows:

[0006] An engine cylinder processing fixture comprises: a fixed base plate, the upper surface of which is provided with at least two positioning and fixing devices; each positioning and fixing device is clamped and fixed in a cylinder hole of the cylinder body;

[0007] Each positioning and fixing device includes: a tensioning component, a locking component and a positioning component; the top of the positioning component is integrally connected to the tensioning component, and the bottom of the positioning component is inserted into the positioning hole set on the upper surface of the fixed base plate; the tensioning component can be inserted into the cylinder hole on the cylinder body, wherein the tensioning component cooperates with the locking component to clamp the cylinder body on the tensioning component.

[0008] Optionally, the positioning component and the surrounding side of the positioning hole are clearance-fitted, a plurality of threaded holes are provided at the bottom of the positioning component, and through holes are provided at positions corresponding to the threaded holes at the bottom surface of the positioning hole of the fixed base plate; wherein bolts pass through the through holes and are screwed into the threaded holes to lock and fix the positioning component to the fixed base plate.

[0009] Optionally, the tensioning component includes at least two tensioning blocks, wherein the at least two tensioning blocks form a side wall of the tensioning component, and the outer surface of the side wall has the same curvature as the inner surface of the cylinder hole; the middle part of the tensioning component is a tensioning cavity, and the tensioning cavity cooperates with the locking component to fix the tensioning component in the cylinder hole of the cylinder body.

[0010] Optionally, the locking component includes a locking block, a locking rod and a locking nut; the locking block can be inserted into the tensioning cavity, and the tensioning component is fixed in the cylinder hole of the cylinder body by cooperating with the tensioning cavity; the top of the locking rod is integrally connected to the center position of the bottom of the locking block, and the bottom outer surface of the locking rod is provided with a thread, and correspondingly, an internal threaded hole is provided at the center of the bottom surface of the positioning hole of the fixed base plate; the locking rod passes through the center hole of the positioning component and is threadedly connected to the internal threaded hole on the fixed base plate, and the locking block is fixed in the tensioning cavity by rotating the locking nut.

[0011] Optionally, the diameter of the expansion cavity is smaller than the outer diameter of the locking block, and the shape of the expansion cavity matches that of the locking block.

[0012] Optionally, the inner surface of the side wall is the first surface, and the corresponding outer surface of the locking block is the second surface, and the first surface and the second surface are fitted together to form a docking surface.

[0013] Optionally, the docking surface is a vertical surface.

[0014] Optionally, the butt joint surface is an outwardly inclined surface.

[0015] Optionally, stepped holes for bolts to pass through are evenly arranged around the fixed base plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The engine cylinder processing fixture provided by the utility model can fix the cylinder body on the upper surface of the fixed base plate by adopting a fixed base plate and at least two positioning and fixing devices arranged on the upper end of the fixed base plate, so as to complete the fine processing of the surrounding surfaces and the bottom surface of the cylinder body at one time, thereby improving the processing accuracy of the cylinder body. Compared with the existing method of using fixed pressure points, it avoids scratches on the bottom surface and surrounding surfaces of the cylinder body during the clamping process, reduces the processing procedures as a whole, and reduces the work intensity of operators and inspection and measurement personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of the engine cylinder block processing fixture;

[0019] Figure 2 It is a structural schematic diagram of a fixed bottom plate;

[0020] Figure 3 It is a structural schematic diagram of the positioning and fixing device;

[0021] Figure 4 It is a structural schematic diagram of a locking component;

[0022] Figure 5 It is a three-dimensional diagram of a cylinder body fixed on a fixed base plate;

[0023] Figure 6 for Figure 5 Top view of the .

[0024] In the figure:

[0025] 1. Fix the bottom plate;

[0026] 2. Positioning and fixing device;

[0027] 21. tensioning component; 211. tensioning block; 212. tensioning chamber;

[0028] 22. Locking component; 221. Locking block; 222. Locking rod; 223. Locking nut;

[0029] 23. Positioning components;

[0030] 3. Positioning hole;

[0031] 4. Cylinder bore;

[0032] 5. Cylinder body;

[0033] 6. Threaded hole;

[0034] 7. Through hole;

[0035] 8. Step hole;

[0036] 9. Center hole;

[0037] 10. Internal threaded hole;

[0038] 11. Rounded ring groove;

[0039] 12. Give way. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application clearer, the following will be combined with the attached Figure 1-6The present application is further described in detail. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0042] The engine cylinder block processing fixture of the present application is applied to the finishing of the cylinder block of an inline engine; the present application takes the cylinder block 5 of an inline four-cylinder engine as an example for detailed description.

[0043] An engine cylinder block processing fixture comprises: a fixed base plate 1, the upper surface of which is provided with two positioning and fixing devices 2; each positioning and fixing device 2 is clamped and fixed in a corresponding cylinder hole 4 of a cylinder block 5;

[0044] Each positioning and fixing device 2 includes: a tensioning component 21, a locking component 22 and a positioning component 23; the top of the positioning component 23 is integrally connected to the tensioning component 21, and a rounded annular groove 11 is provided between the two; the bottom of the positioning component 23 is inserted into the positioning hole 3 provided on the upper surface of the fixed base plate 1; the tensioning component 21 can be inserted into the cylinder hole 4 on the cylinder body 5, wherein the tensioning component 21 cooperates with the locking component 22 to clamp and fix the cylinder body 5 on the tensioning component 21.

[0045] In this embodiment, two positioning and fixing devices 2 are used, which are respectively inserted into the cylinder holes 4 of the first cylinder and the fourth cylinder on the top surface of the engine cylinder block 5, and clamped and fixed, so that the bottom surface and the surrounding surfaces of the cylinder block 5 can be finely processed at one time, thereby improving the processing accuracy of the cylinder block 5.

[0046] It should be noted that the geometric relationship between the key dimensions of the surrounding surfaces and the bottom surface of the cylinder body 5 is complex and highly precise. Therefore, by completing the processing of the bottom surface and the surrounding surfaces of the cylinder body 5 at one time, the dimensional accuracy of the cylinder body 5 is greatly improved, while reducing a large amount of manual operation and inspection and measurement time costs.

[0047] The positioning component 23 and the surrounding side of the positioning hole 3 are clearance-matched, and the clearance size is 0.1mm-0.3mm, preferably 0.1mm; a plurality of threaded holes 6 are provided at the bottom of the positioning component 23, and a through hole 7 is provided at the bottom surface of the positioning hole 3 of the fixed base plate 1 at a position corresponding to the threaded hole 6; wherein, a bolt passes through the through hole 7 and is screwed into the threaded hole 6 to lock and fix the positioning component 23 to the fixed base plate 1; the advantage of this design is that the positioning and fixing device 2 is easy to install through the clearance fit between the positioning component 23 and the positioning hole 3; and the bolt fixing method is convenient for installation and disassembly, and the operation is simple.

[0048] The tensioning component 21 includes at least two tensioning blocks 211, wherein the at least two tensioning blocks 211 form a side wall of the tensioning component 21, and the outer surface of the side wall has the same curvature as the inner surface of the cylinder hole 4; the middle part of the tensioning component 21 is a tensioning cavity 212, and the tensioning cavity 212 cooperates with the locking component 22 to fix the tensioning component 21 in the cylinder hole 4 of the cylinder body 5.

[0049] In this embodiment, the tensioning component 21 includes six tensioning blocks 211; when in use, first align the cylinder hole 4 of the cylinder body 5 with the tensioning component 21 so that the tensioning component 21 can be inserted into the cylinder hole 4, and then, insert the locking component 22 into the tensioning cavity 212 at the center of the tensioning component 21, tighten the locking component 22 with a wrench, and press the locking component 22 into the tensioning cavity 212. The locking component 22 applies a force to the inner surface of the side wall of the tensioning component 21, so that the six tensioning blocks 211 are displaced outward and generate a squeezing force on the inner surface of the cylinder hole 4, thereby achieving clamping and fixation of the cylinder body.

[0050] The present application fixes the tensioning component 21 in the cylinder hole 4 by cooperating with the tensioning component 21 and the locking component 22. Since the tensioning component 21 adopts six tensioning blocks 211 of the same structure, a clearance opening 12 is provided between adjacent tensioning blocks 211. At the same time, the outer surface of the tensioning block 211 has the same curvature as the inner surface of the cylinder hole 4. Therefore, in the process of the locking component 22 squeezing the tensioning component 21, the inner surface of the cylinder hole 4 is evenly stressed and the force is dispersed. While satisfying the clamping and fixing of the cylinder body 5, it is convenient for operation and will not cause damage to the cylinder body 5.

[0051] Furthermore, the locking component 22 includes a locking block 221, a locking rod 222 and a locking nut 223; the locking block 221 can be inserted into the tensioning cavity 212, and the shapes of the two match; the locking block 221 fixes the tensioning component 21 in the cylinder hole 4 of the cylinder body by cooperating with the tensioning cavity 212; the top of the locking rod 222 is integrally connected to the center position of the bottom of the locking block 221, and the bottom outer surface of the locking rod 222 is provided with a thread, and correspondingly, an internal threaded hole 10 is provided at the center of the bottom surface of the positioning hole 3 of the fixed base plate 1; the locking rod 222 passes through the center hole 9 of the positioning component 23 and is threadedly connected to the internal threaded hole 10 on the fixed base plate 1, and the locking block 221 is fixed in the tensioning cavity 212 by rotating the locking nut 223.

[0052] In this embodiment, the locking block 221 applies force to the side wall of the tensioning cavity 212, thereby fixing the tensioning component 21 inside the cylinder hole 4. After processing, the cylinder body can be removed from the clamp by loosening the locking nut 223, which is easy to operate.

[0053] The diameter of the expansion cavity 212 is smaller than the outer diameter of the locking component 22 , and the shape of the expansion cavity 212 matches the locking block 221 .

[0054] The outer diameter of the tensioning member 21 is smaller than the inner diameter of the cylinder hole 4 .

[0055] The inner surface of the side wall is the first surface, and the corresponding outer surface of the locking block 221 is the second surface. The first surface and the second surface are attached to form a butt joint surface.

[0056] The butt joint surface is a vertical surface; that is, the vertical contour line of the vertical surface is parallel to the center line of the locking rod 222;

[0057] In actual use, the advantage of the butt joint surface being a vertical surface is that the processing process of the tensioning component 21 is simple, but the disadvantage is that the locking component 22 is subject to greater resistance from the tensioning block 211 during the locking process, is difficult to operate, and has a shorter service life.

[0058] Among them, the docking surface is an outward inclined surface; that is, the vertical contour line of the docking surface forms an angle with the center line of the locking rod 222; the advantage of this design is that, since the docking surface is an outward inclined surface, the tightening chamber 212 of the tightening component 21 is a conical chamber, and the locking component 22 is easy for workers to operate during the locking process, and the tightening component 21 and the locking component 22 have a better coordination effect, and the cylinder body has better stability during the processing process.

[0059] In this embodiment, the locking block 221 is a conical block, and the corresponding side surface of the tightening cavity 212 is an outwardly inclined slope.

[0060] Furthermore, stepped holes 8 for bolts to pass through are evenly arranged around the fixed base plate 1; when in use, the fixed base plate 1 needs to be placed on a pad of a machine tool, and the bolts pass through the stepped holes 8 to fix the fixed base plate 1 on the machine tool.

[0061] The engine cylinder block processing fixture provided in the present application improves processing accuracy, reduces processing steps, and can also be applied to trial production of other different types of in-line engine cylinder blocks.

[0062] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

Claims

1. An engine cylinder block machining fixture, characterized in that: include: A fixed base plate (1), wherein at least two positioning and fixing devices (2) are arranged on the upper surface of the fixed base plate (1); Each positioning and fixing device (2) is clamped and fixed in a cylinder hole (4) of a cylinder body (5); Each positioning and fixing device (2) comprises: a tensioning component (21), a locking component (22) and a positioning component (23); the top of the positioning component (23) is integrally connected to the tensioning component (21), and the bottom of the positioning component (23) is inserted into a positioning hole (3) provided on the upper surface of the fixed base plate (1); the tensioning component (21) can be inserted into a cylinder hole (4) on the cylinder body (5), wherein the tensioning component (21) cooperates with the locking component (22) to clamp and fix the cylinder body (5) on the tensioning component (21).

2. The engine cylinder block machining fixture according to claim 1, characterized in that: The positioning component (23) and the circumferential side of the positioning hole (3) are clearance-matched, a plurality of threaded holes (6) are provided at the bottom of the positioning component (23), and through holes (7) are provided at positions corresponding to the threaded holes (6) on the bottom surface of the positioning hole (3) of the fixed base plate (1); wherein bolts pass through the through holes (7) and are screwed into the threaded holes (6) to lock and fix the positioning component (23) and the fixed base plate (1).

3. The engine cylinder block machining fixture according to claim 2, characterized in that: The tensioning component (21) comprises at least two tensioning blocks (211), wherein the at least two tensioning blocks (211) form a side wall of the tensioning component (21), and the outer surface of the side wall has the same curvature as the inner surface of the cylinder hole (4); the middle part of the tensioning component (21) is a tensioning cavity (212), and the tensioning component (211) is fixed in the cylinder hole (4) of the cylinder body (5) through the cooperation of the tensioning cavity (212) and the locking component (22).

4. The engine cylinder block machining fixture according to claim 3, characterized in that: The locking component (22) comprises a locking block (221), a locking rod (222) and a locking nut (223); the locking block (221) is inserted into the tensioning cavity (212) and fixed in the cylinder hole (4) of the cylinder body (5) by cooperating with the tensioning cavity (212); the top of the locking rod (222) is integrally connected to the center position of the bottom of the locking block (221), the bottom outer surface of the locking rod (222) is provided with a thread, and correspondingly, an internal threaded hole (10) is provided at the center of the bottom surface of the positioning hole (3) of the fixed base plate (1); the locking rod (222) passes through the center hole (9) of the positioning component (23) and is threadedly connected to the internal threaded hole (10) on the fixed base plate (1), and the locking block (221) is fixed in the tensioning cavity (212) by rotating the locking nut (223).

5. The engine cylinder block machining fixture according to claim 4, characterized in that: The diameter of the expansion cavity (212) is smaller than the outer diameter of the locking block (221), and the shape of the expansion cavity (212) matches that of the locking block (221).

6. The engine cylinder block machining fixture according to claim 5, characterized in that: The inner surface of the side wall is the first surface, and the corresponding outer surface of the locking block (221) is the second surface, and the first surface and the second surface are fitted together to form a butt joint surface.

7. The engine cylinder block machining fixture according to claim 6, characterized in that: The butt joint surface is a vertical surface.

8. The engine cylinder block machining fixture according to claim 6, characterized in that: The butt joint surface is an outwardly inclined surface.

9. The engine cylinder block machining fixture according to claim 7 or 8, characterized in that: Step holes (8) for bolts to pass through are evenly arranged around the fixed base plate (1).

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