Fine boring clamp for large and small head holes of engine connecting rod

Abstract

The utility model relates to an engine connecting rod large and small head hole fine boring clamp which comprises a clamp body, a fixed template and a movable template are arranged on the clamp body, the movable template is in sliding connection with the clamp body through a guide key, a small head supporting block is arranged on the fixed template, and a large head cushion block is arranged on the movable template. And the center distance between the large-head cushion block and the small-head supporting block is adjusted by moving the movable template. The utility model relates to the technical field of clamps for connecting rods. The clamp has the advantages that the use range of the clamp is expanded, a die does not need to be disassembled and assembled again and a machine tool does not need to be debugged when connecting rods with different center distances are machined, working procedures are simplified, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod clamps, in particular to a precision boring clamp for large and small head holes of engine connecting rods. Background Art

[0002] In mechanical processing, the fixture is the link between the processing equipment and the workpiece. The accuracy of its positioning and clamping directly affects the position of the workpiece relative to the tool, and greatly affects the accuracy of the processed workpiece. Therefore, the fixture plays a vital role in processing.

[0003] The center distances of the large and small end holes of the existing fixtures are fixed. Every time the type of product is changed, the special fixture needs to be replaced and the machine tool needs to be readjusted, which is a lot of work. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a precision boring fixture for large and small head holes of engine connecting rods, which has the effect of expanding the scope of use of the fixture, eliminating the need to disassemble and reassemble the fixture and debug the machine tool when processing connecting rods with different center distances, simplifying the work procedure and improving work efficiency.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A fine boring fixture for large and small head holes of an engine connecting rod comprises a fixture body, a fixed template and a movable template are arranged on the fixture body, the movable template is slidably connected with the fixture body through a guide key, a small head support block is arranged on the fixed template, and a large head cushion block is arranged on the movable template;

[0007] The center distance between the large head pad block and the small head support block is adjusted by moving the movable template.

[0008] In a preferred example, the utility model can be further configured as follows: a mandrel oil cylinder is arranged on the side of the clamp body away from the fixed template, a small head hole positioning mandrel is arranged on the output end of the mandrel oil cylinder, and the small delivery hole positioning mandrel passes through the clamp body and the small head support block;

[0009] The small head hole positioning mandrel passes through the small head hole of the connecting rod.

[0010] In a preferred example, the utility model can be further configured as follows: a first positioning component is provided on the fixed template, and the first positioning component fixes the position of the small end of the connecting rod;

[0011] The movable template is provided with a second positioning component, which fixes the position of the big end of the connecting rod.

[0012] In a preferred example, the utility model can be further configured as follows: the first positioning assembly includes two small head side supporting cylinders and one small head clamping cylinder, and the two small head side supporting cylinders and the small head clamping cylinder are both arranged on the fixed template.

[0013] In a preferred example, the utility model can be further configured as follows: the second positioning assembly includes two big-head supporting cylinders and two big-head clamping cylinders, and the two big-head supporting cylinders and the two big-head clamping cylinders are both arranged on the movable template.

[0014] In a preferred example, the utility model can be further configured as follows: a big head side positioning block is arranged above the big head pressing cylinder just below the big head cushion block.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. By arranging a fixed template and a movable template on the clamp body, the movable template is slidably connected to the component body through a sliding key, thereby changing the center distance between the small head support block on the fixed template and the large head support block on the movable template, so that the clamp can adapt to connecting rods with different center distances, expanding the use range of the clamp, and eliminating the need to disassemble and replace the clamp and debug the machine tool when processing connecting rods with different center distances, thereby simplifying the work procedure and improving work efficiency.

[0017] 2. By setting a first positioning component on the fixed template and a second positioning component on the movable template, the clamping operation is automated, reducing the operator's physical labor while accurately controlling the clamping force. While ensuring that the connecting rod position is fixed, the connecting rod surface will not be damaged, thereby affecting the processing accuracy of the connecting rod hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the existing clamp mentioned in the background technology;

[0019] Figure 2 is a schematic diagram of the front structure of this embodiment;

[0020] Figure 3 yes Figure 2 Schematic diagram of the top view of the half-section structure.

[0021] In the figure, 1. clamping body; 11. fixed template; 12. movable template; 13. small head support block; 14. big head support block; 2. mandrel cylinder; 21. small hole positioning mandrel; 3. first positioning assembly; 4. second positioning assembly; 31. small head side support cylinder; 32. small head clamping cylinder; 41. big head support cylinder; 42. big head clamping cylinder; 43. big head side positioning block. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example:

[0024] Reference Figure 1 The utility model discloses a fine boring fixture for large and small head holes of an engine connecting rod, comprising a fixture body 1, on which a fixed template 11 and a movable template 12 are arranged. The movable template 12 is slidably connected with the fixture body 1 through a guide key. A small head support block 13 is arranged on the fixed template 11, and a large head pad is arranged on the movable template 12. The height of the small head support block 13 is the same as that of the large head pad.

[0025] A mandrel oil cylinder 2 is provided on one side of the clamp body 1 away from the fixed template 11. A small head hole positioning mandrel 21 is provided on the output end of the mandrel oil cylinder 2, and the small head hole positioning mandrel 21 passes through the clamp body 1 and the small head support block 13. When in use, the small head hole positioning shaft passes through the small head hole of the connecting rod to position the connecting rod.

[0026] Since the height of the small head support block 13 is the same as the height of the large head pad, one side of the connecting rod is in contact with one side of the small head support block 13 and one side of the large head pad height. Ensure that the surface of one side of the connecting rod is parallel to the surface of one side of the clamp body 1.

[0027] For connecting rods with different center distances, the distance between the large head pad and the small head support block 13 is adjusted by moving the movable template 12, so that the clamp can adapt to connecting rods with different center distances, thereby expanding the application range of the clamp.

[0028] The fixed template 11 is provided with a first positioning assembly 3, which fixes the position of the small end of the connecting rod. The first positioning assembly 3 includes two small end side supporting cylinders 31 and a small end clamping cylinder 32, and the two small end side supporting cylinders 31 and the small end clamping cylinder 32 are both provided on the fixed template 11. The small end clamping cylinder 32 is rotatable. When placing or taking the connecting rod, the small end clamping cylinder 32 not only does not fit the surface of the connecting rod, but also the small end clamping cylinder 32 rotates a certain angle, which is convenient for the operator to take or place the connecting rod.

[0029] The second positioning assembly 4 includes two large head supporting cylinders 41 and two large head pressing cylinders 42, and the two large head supporting cylinders 41 and the two large head pressing cylinders 42 are both arranged on the movable template 12. Both large head pressing cylinders 42 are rotatable and do not affect the operator to place or take the connecting rod.

[0030] The two small-head side supporting cylinders 31 , the small-head pressing cylinder 32 , the two large-head supporting cylinders 41 and the two large-head pressing cylinders 42 are all connected to the hydraulic station through oil pipes.

[0031] A big head side positioning block 43 is arranged above the big head pressing oil cylinder 42 just under the big head pad. When the connecting rod is placed on the fixture, due to factors such as the connecting rod's own gravity, the big head end of the connecting rod contacts the big head side positioning block 43, thereby further determining the placement position of the connecting rod on the fixture.

[0032] It is especially noted that during use, the fixture is placed in the state of Figure 2 As shown, the clamp body 1 is placed vertically.

[0033] The implementation principle of the above embodiment is:

[0034] In actual use, the operator moves the movable template 12 in advance according to the center distance of the processed connecting rod, thereby changing the center distance between the small head support block 13 and the large head support block 14.

[0035] During the placement of the connecting rod, the operator inserts the small end hole of the connecting rod into the small end positioning core shaft 21, and the large end of the connecting rod naturally contacts the large end side positioning block 43 downward, thereby preliminarily determining the position of the connecting rod.

[0036] Each cylinder of the fixture is connected to the hydraulic station with a high-pressure oil pipe, and the hydraulic station control system controls the movement of each cylinder according to program requirements.

[0037] In the next step, the operator starts the clamping procedure, and the hydraulic system automatically clamps the big and small ends of the connecting rod in a front-to-back order, and the side support cylinders at the big and small ends support the outer edges of the big and small ends in place.

[0038] When the large and small end clamping cylinders and the side support cylinder positions are in place, the hydraulic system automatically retracts the positioning mandrel 21 according to the program, and the machine tool enters the processing program.

[0039] When the connecting rod processing is completed, the hydraulic system automatically releases the side support cylinder and the clamping cylinder, and the small head spindle automatically rises for subsequent loading and positioning, and the cycle continues.

[0040] It is particularly noted that during the pressing and supporting process, the surface of the connecting rod will not be damaged while ensuring that the position of the connecting rod is firmly fixed.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A precision boring fixture for engine connecting rod head holes, comprising a fixture body (1), characterized in that: The clamp body (1) is provided with a fixed template (11) and a movable template (12), the movable template (12) is slidably connected to the clamp body (1) via a guide key, the fixed template (11) is provided with a small head support block (13), and the movable template (12) is provided with a large head cushion block (14); The center distance between the large head pad (14) and the small head support block (13) is adjusted by moving the movable template (12).

2. The engine connecting rod head and end hole precision boring fixture according to claim 1, characterized in that: A mandrel oil cylinder (2) is arranged on the side of the clamp body (1) away from the fixed template (11), and a small head hole positioning mandrel (21) is arranged on the output end of the mandrel oil cylinder (2), and the small head hole positioning mandrel (21) passes through the clamp body (1) and the small head support block (13); The small head hole positioning core shaft (21) passes through the inner end of the small head hole of the connecting rod.

3. The engine connecting rod head and end hole precision boring fixture according to claim 2, characterized in that: The fixed template (11) is provided with a first positioning component (3), and the first positioning component (3) fixes the position of the small end of the connecting rod; A second positioning component (4) is provided on the movable template (12), and the second positioning component (4) fixes the position of the connecting rod big end.

4. The engine connecting rod head and end hole precision boring fixture according to claim 3, characterized in that: The first positioning assembly (3) comprises two small head side supporting oil cylinders (31) and one small head pressing cylinder (32), and the two small head side supporting oil cylinders (31) and the small head pressing cylinder (32) are both arranged on the fixed template (11).

5. The engine connecting rod head hole precision boring fixture according to claim 3, characterized in that: The second positioning assembly (4) comprises two large-head supporting oil cylinders (41) and two large-head pressing oil cylinders (42), and the two large-head supporting oil cylinders (41) and the two large-head pressing oil cylinders (42) are both arranged on the movable template (12).

6. The engine connecting rod head and end hole precision boring fixture according to claim 5, characterized in that: A big head side positioning block (43) is provided above the big head pressing oil cylinder (42) located directly below the big head cushion block (14).

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