Scribing-free inclined hole boring clamp
By designing a mark-free boring and inclined hole fixture, using the combination of "one side, two pins" positioning and multiple compression mechanisms, the problem of time-consuming and labor-intensive processing and safety hazards of traditional cylinder head inclined hole processing is solved, and efficient and safe boring processing is achieved, reducing costs and process cycles.
Patent Information
- Application Number
- CN202421462226.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The traditional method of oblique hole processing of cylinder heads requires the flip of the cylinder head for three-dimensional marking, which is time-consuming and labor-intensive, posing safety hazards, and the marking efficiency is low and the shape and position accuracy is poor, which increases labor costs and production costs.
A non-scribing boring and inclined hole fixture is designed, adopting the "one side, two pins" positioning method. By setting multiple compression mechanisms to limit the six degrees of freedom of the cylinder head, stable clamping of the cylinder head is achieved and boring is directly carried out.
This fixture solves the safety hazards brought by flipping the cylinder head, saves marking hours, reduces labor costs, shortens the process cycle, and improves economic benefits.
Smart Images
Figure CN222791296U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boring inclined holes of cylinder heads, in particular to a boring fixture for inclined holes of cylinder heads. Background Art
[0002] The cylinder head is a key component of a diesel engine. It needs to withstand the combined effects of alternating loads such as high temperature, high pressure and chemical corrosion during operation, and the working conditions are very harsh.
[0003] There is a roughcast oblique hole on the lower plate at the top of the 240 diesel engine cylinder head that needs to be processed. Before drilling with a radial drilling machine, a marking operation is required to determine the installation reference and size limit of the cylinder head on the machine tool. The traditional marking method is to flip the cylinder head and perform three-dimensional marking in three directions (i.e., three-coordinate method). This operation method is time-consuming and laborious, and because there is an angle between the hole and the center line of the cylinder head, when marking with the above method, it is necessary to keep it at a certain angle for support. The support structure is not stable, and there are major safety hazards.
[0004] At the same time, this operation method has low marking efficiency, poor shape and position accuracy after inclined hole processing, high labor cost, and requires the establishment of professional marking platforms and specific marking positions, which increases certain production costs for the enterprise.
[0005] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention
[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a boring and oblique hole fixture which can eliminate the potential safety hazards caused by turning over the cylinder head, save the marking process, reduce labor costs, shorten the process cycle and improve economic benefits.
[0007] The technical solution of the utility model is: a boring and oblique hole fixture without scribing, comprising a base plate 1, characterized in that: a first locating pin 2 and a second locating pin 3 are arranged on the base plate 1, the first locating pin 2 is a rhombus pin, a first opening groove 4 and a second opening groove 5 parallel to each other are opened on one side of the base plate 1, and a third opening groove 6 and a fourth opening groove 7 which are also parallel to each other are opened on the other side, and the axes of the first opening groove 4 and the third opening groove 6 are collinear, and the axes of the second opening groove 5 and the fourth opening groove 7 are collinear, and an angle α is formed between the first opening groove 4 and the side of the base plate 1,
[0008] A plurality of clamping mechanisms 8 are also provided on the bottom plate 1.
[0009] The clamping mechanism 8 includes a support mandrel 9 fixedly connected to the base plate 1, a pressing sleeve 10 is movably sleeved on the outside of the support mandrel 9, and a support sleeve 11 which is also fixedly connected to the base plate 1 is arranged outside the pressing sleeve 10. A spring 12 is sleeved on the outside of the support mandrel 9, and the spring 12 is located between the base plate 1 and the pressing sleeve 10. A pressing plate 13 is arranged on the pressing sleeve 10, and a hexagonal pressure bolt 14 is rotatably connected to the end of the pressing sleeve 10. The hexagonal pressure bolt 14 is threadedly connected to the support mandrel 9.
[0010] A plurality of positioning keys 15 are disposed on the back side of the base plate 1 .
[0011] A protruding pressing rod portion 16 is provided at the end of the pressing plate 13 .
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] This type of boring and bevel hole fixture without marking has a simple structure, ingenious design, and reasonable layout. It adopts "one side and two pins" positioning, and one positioning pin must be a prismatic pin to complete the positioning and installation of the cylinder head in the fixture. By setting 4 force points and designing 4 elastic thread clamping devices for effective connection, the six degrees of freedom of the workpiece are limited to complete the clamping of the cylinder head in the fixture. The boring and bevel hole fixture solves the problem of turning over the cylinder head for three-dimensional marking before drilling, saving marking time, and no need to set up a professional marking platform and specific marking positions, which reduces labor costs, shortens the process cycle, eliminates the safety hazards caused by turning over the cylinder head for three-dimensional marking, and improves economic benefits. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field, and its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is the front view of the embodiment of the utility model.
[0015] Figure 2 It is a top view of an embodiment of the utility model.
[0016] Figure 3 It is a cross-sectional view of the clamping mechanism in the embodiment of the utility model. DETAILED DESCRIPTION
[0017] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 3As shown: A boring and oblique hole fixture without scribing, including a base plate 1 as a basis, a first positioning pin 2 and a second positioning pin 3 are arranged on the base plate 1, the first positioning pin 2 is a diamond pin, a first opening groove 4 and a second opening groove 5 are parallel to each other on one side of the base plate 1, and a third opening groove 6 and a fourth opening groove 7 are also parallel to each other on the other side, and the axes of the first opening groove 4 and the third opening groove 6 are collinear, and the axes of the second opening groove 5 and the fourth opening groove 7 are collinear, and an angle α is formed between the first opening groove 4 and the side of the base plate 1,
[0018] A plurality of clamping mechanisms 8 are also provided on the bottom plate 1.
[0019] The clamping mechanism 8 includes a support mandrel 9 fixedly connected to the base plate 1, a pressing sleeve 10 is movably sleeved on the outside of the support mandrel 9, and a support sleeve 11 which is also fixedly connected to the base plate 1 is arranged outside the pressing sleeve 10. A spring 12 is sleeved on the outside of the support mandrel 9, and the spring 12 is located between the base plate 1 and the pressing sleeve 10. A pressing plate 13 is arranged on the pressing sleeve 10, and a hexagonal pressure bolt 14 is rotatably connected to the end of the pressing sleeve 10. The hexagonal pressure bolt 14 is threadedly connected to the support mandrel 9.
[0020] A plurality of positioning keys 15 are disposed on the back side of the base plate 1 .
[0021] A protruding pressing rod portion 16 is provided at the end of the pressing plate 13 .
[0022] The working process of the boring and bevel hole fixture without marking in the embodiment of the utility model is as follows: the fixture adopts the positioning method of "one side and two pins", the second positioning pin 3 is assembled at the center position of the top surface of the bottom plate 1 in a transition fit manner, and the first positioning pin 2 is also assembled on the bottom plate 1 in a transition fit manner, and the first positioning pin 2 is a prismatic pin,
[0023] A plurality of positioning keys 15 arranged on the back side of the base plate 1 can be used for positioning on a machine tool;
[0024] When the base plate 1 is connected to the machine tool worktable, the four inclined opening grooves arranged on the two sides of the base plate 1 can be used as force points. The opening grooves and the sides of the base plate 1 form an angle α, which is consistent with the inclination angle of the oblique hole of the blank to be processed on the cylinder head;
[0025] First, lift the bottom plate 1 onto the workbench of the machine tool, align the four inclined opening slots with the T-shaped slide slots on the workbench of the machine tool, push the bottom plate 1 to a convenient position for operation, adjust the installation accuracy, insert the T-shaped nut into the T-shaped slideway on the workbench, slide it into the notch of an opening slot on the bottom plate 1, screw in the fastening bolt, and put the hexagonal nut on the fastening bolt, tighten the hexagonal nut with force, operate all the opening slots in the same way, and finally complete the positioning and installation of the bottom plate 1 on the machine tool;
[0026] Then the cylinder head is hoisted onto the bottom plate 1. At this time, the hole system on the top surface of the cylinder head has the injector installation hole in the center (the hole matches the second positioning pin 3). A hole that has been processed and reaches the design accuracy is selected on it. The above two holes are used as process holes. The second positioning pin 3 and the first positioning pin 2 are respectively inserted into the above two holes to complete the positioning installation of "one side and two pins";
[0027] Then adjust the pressing rod part 16 in the clamping mechanism 8. Among the four pressing rod parts 16, two are inserted into the blank sand cleaning holes on the cylinder head, one is pressed on the front plate of the cylinder head, and the last one is pressed on the hole wall of the exhaust duct. Then, the four clamping mechanisms 8 are operated respectively, and the cylinder head is pressed on the base plate 1 by using the four clamping mechanisms 8 to realize the clamping of the cylinder head on the base plate 1. Finally, the inclined holes on the cylinder head can be bored.
[0028] The working process of the clamping mechanism 8 is as follows: the hexagonal inner pressure bolt 14 is rotated by the hexagonal inner wrench. Since the hexagonal inner pressure bolt 14 is threadedly connected to the support core shaft 9, this rotation will be converted into a linear motion along the axial direction of the hexagonal inner pressure bolt 14. Since the hexagonal inner pressure bolt 14 is rotatably connected to the pressing sleeve 10, the pressing sleeve 10 will be driven to move. During the movement, the spring 12 is compressed, and the pressing sleeve 10 drives the pressing plate 13 and the pressing rod portion 16 thereon to move, thereby achieving the clamping of the workpiece;
[0029] When the workpiece needs to be loosened, it is only necessary to rotate the hexagonal pressure bolt 14 in the reverse direction.
Claims
1. A scribing-free boring fixture, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with a first positioning pin (2) and a second positioning pin (3), the first positioning pin (2) being a rhombus-shaped pin, a first opening slot (4) and a second opening slot (5) being parallel to each other are provided on one side of the bottom plate (1), and a third opening slot (6) and a fourth opening slot (7) being also parallel to each other are provided on the other side, the axes of the first opening slot (4) and the third opening slot (6) being collinear, the axes of the second opening slot (5) and the fourth opening slot (7) being collinear, and an angle α is formed between the first opening slot (4) and the side of the bottom plate (1), A plurality of clamping mechanisms (8) are also provided on the bottom plate (1). The clamping mechanism (8) comprises a supporting core shaft (9) fixedly connected to the base plate (1), a pressing sleeve (10) movably sleeved on the outside of the supporting core shaft (9), a supporting sleeve (11) also fixedly connected to the base plate (1) is arranged outside the pressing sleeve (10), a spring (12) is sleeved on the outside of the supporting core shaft (9), the spring (12) is located between the base plate (1) and the pressing sleeve (10), a pressing plate (13) is arranged on the pressing sleeve (10), and an inner hexagon pressure bolt (14) is rotatably connected to the end of the pressing sleeve (10), and the inner hexagon pressure bolt (14) is threadedly connected to the supporting core shaft (9). A plurality of positioning keys (15) are arranged on the back side of the base plate (1).
2. The scribing-free boring and bevel hole fixture according to claim 1, characterized in that: A protruding pressing rod portion (16) is provided at the end of the pressing plate (13).