CN205765072U - Automobile engine cylinder head end face rough mills fixture - Google Patents

Abstract

The utility model discloses a rough milling fixture for the top surface of a cylinder head of an automobile engine, which comprises a bottom plate, a positioning mechanism arranged on the bottom plate and used for positioning the cylinder head, and a pressing mechanism for pressing the cylinder head. The limit baffle on the bottom plate and distributed on the outside of the positioning mechanism, the positioning mechanism includes a number of support nails arranged on the bottom plate, the top surface of the support nails is a plane for contacting the bottom surface of the engine cylinder head. The rough milling fixture for the top surface of the automobile engine cylinder head of the utility model has a simple structure and is convenient to operate. By setting a positioning mechanism composed of supporting nails and cooperating with a pressing mechanism and a limit baffle, the precise clamping of the cylinder head can be realized. It also improves the clamping efficiency and the reliability of pressing, and the processing efficiency is relatively high, and the employees who process the product can go to work without training.

Description

Rough milling fixture for the top surface of automobile engine cylinder head

technical field

The utility model relates to a clamping device, in particular to a rough milling clamp for the top surface of an automobile engine cylinder head.

Background technique

At present, in the machining process of the automobile engine cylinder head, the rough milling of the top surface is the second process in the process. The purpose of the machining is to determine the rough datum for the subsequent process, so the machining accuracy will directly affect the positioning of the engine cylinder head The accuracy of the benchmark, which has the greatest impact on the quality of fixtures. In the general processing process, the common combination fixture on the machine tool is often used to realize the clamping of the tooling, which requires the operator to have very skilled technology, and due to the complexity of the structure of the cylinder head of the automobile engine, the operator chooses and installs the general combination. Fixtures take a lot of time, which has an unnecessary impact on the efficiency of cylinder head processing.

Utility model content

The utility model provides a rough milling fixture for the top surface of a cylinder head of an automobile engine, aiming at improving the clamping efficiency of the cylinder head.

In order to achieve the above object, the technical solution adopted by the utility model is: the rough milling fixture on the top surface of the cylinder head of the automobile engine, including the bottom plate, the positioning mechanism arranged on the bottom plate and used for positioning the cylinder head, and the pressure clamp for pressing the cylinder head. The tightening mechanism also includes a limit baffle arranged on the base plate and distributed outside the positioning mechanism. The positioning mechanism includes several support nails arranged on the base plate. The top surface of the support nails is used for connecting with the engine cylinder head The plane that the bottom surface touches.

A total of three support nails are arranged on the top surface of the bottom plate, and the three support nails are arranged in a triangular distribution.

The limiting baffle is fixed on the top surface of the bottom plate by screws.

There are multiple limit baffles, and all the limit baffles are distributed in an L shape.

There are three pressing mechanisms in total, and the three pressing mechanisms are distributed in a triangle.

The rough milling fixture for the top surface of the automobile engine cylinder head of the utility model has a simple structure and is easy to operate. By setting a positioning mechanism composed of supporting nails and cooperating with a pressing mechanism and a limit baffle, the precise clamping of the cylinder head can be realized. It also improves the clamping efficiency and the reliability of pressing, and the processing efficiency is relatively high, and the employees who process the product can go to work without training.

Description of drawings

This manual includes the following drawings, the contents shown are:

Fig. 1 is the structural representation of clamp of the present utility model;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a schematic diagram of the connection between the positioning bush and the pin;

The marks in the figure are: 1. The first support column; 2. The pressure plate; 3. The second support column; 4. The compression nut; 5. The bottom plate; 6. The support nail; 9. Engine cylinder head; 10. Bushing; 11. Pin; 12. Spring; 13. Gasket.

detailed description

Next, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present utility model , and contribute to its implementation.

As shown in Figures 1 and 2, the utility model provides a rough milling fixture for the top surface of an automobile engine cylinder head, including a bottom plate 5, a positioning mechanism arranged on the bottom plate 5 and used for positioning the cylinder head, and a clamp for pressing The pressing mechanism of the cylinder head also includes a limit baffle plate 8 arranged on the bottom plate 5 and distributed outside the positioning mechanism. The positioning mechanism includes several support nails 6 arranged on the bottom plate 5. The top surface of the support nails 6 is used for on the plane in contact with the bottom surface of the engine cylinder head.

Specifically, as shown in Figures 1 and 2, the bottom plate 5 is a horizontally placed rectangular flat plate, and the support nails 6 are fixed on the top surface of the bottom plate 5 by screws, and the axis of the support nails 6 is perpendicular to the top surface of the bottom plate 5. The top surface of the supporting nails 6 is a plane, and the top surfaces of all the supporting nails 6 are ground together to form a positioning plane in the clamping process of the engine cylinder head. The bottom surface of the cylinder head is placed on the positioning plane formed by the supporting nails 6, and the bottom surface of the cylinder head is the plane in contact with the engine block.

As shown in Figure 1 and Figure 2, the limit baffle 8 is fixedly arranged on the top surface of the base plate 5 by the hexagon socket head cap screw 7, the limit baffle 8 is an L-shaped structure, and the limit baffle 8 and the support nail 6 All sizes are small. A plurality of limit baffles 8 are distributed around all the support nails 6, the vertical distance between the top surface of the limit baffle 8 and the top surface of the bottom plate 5 is greater than the vertical distance between the top surface of the support nails 6 and the top surface of the bottom plate 5, The limit baffle 8 is used to contact the side wall of the engine cylinder head and limit the position, and the limit function played by the limit baffle 8 limits the position of the engine cylinder head in the clamping device.

As shown in Figures 1 and 2, in the embodiment, three support nails 6 and three limit baffles 8 are arranged respectively, and the three support nails 6 are distributed in an isosceles triangle on the top surface of the bottom plate 5, forming a shape for the cylinder head. Supported at three points, the three limit baffles 8 are distributed in an L shape. Among the three limit baffles 8, one of the limit baffles 8 is located at one end of the length direction of the bottom plate 5, and the other two limit baffles 8 are located on the same straight line parallel to the length direction of the bottom plate 5, And one of the support nails 6 is located between the two limit baffles 8, and the two limit baffles 8 are also used to contact the long sides of the engine cylinder head, and the other two support nails 6 are in contact with the two limit baffles. The baffle plate 8 is located on the same straight line parallel to the straight line, and the two supporting nails 6 correspond to a corner of the engine cylinder head respectively.

The pressing mechanism of this fixture cooperates with the positioning mechanism to compress the cylinder head. The pressing mechanism is arranged at the two ends of the engine cylinder head, and the engine cylinder head is pressed on the support plane formed by the supporting nails 6 . As shown in Figure 1 and Figure 2, the pressing mechanism includes a first support column 1 vertically arranged on the bottom plate 5, a pressing plate 2 sleeved on the first support column 1 and used to compress the cylinder head, sleeved on the second A compression nut 4 on a supporting column 1 and located above the pressing plate 2 and a spring 12 sleeved on the first supporting column 1 and located below the pressing plate 2 . In this embodiment, three pressing mechanisms are provided in total, and the three pressing mechanisms are distributed in a triangle, and each of the three pressing mechanisms corresponds to one supporting nail 6 . The pressing plate 2 is a strip-shaped plate, and the pressing plate 2 is provided with an elongated hole for passing through the first supporting column 1. The elongated hole extends along the length direction of the pressing plate 2, and the first supporting column 1 is located above the pressing plate 2. The screwed compression nut 4, the first support column 1 is also provided with a spring 12 and a gasket 13 under the pressure plate 2, the spring 12 is a cylindrical coil spring 12, and one end of the spring 12 is in contact with the gasket 13, and the gasket The sheet 13 is against the pressing plate 2 , and the other end of the spring 12 is against the nut at the bottom of the first support column 1 . When clamping, tighten the compression nut 4 on the first support column 1, the pressing plate 2 can be pressed on the boss on the side wall of the engine cylinder head to complete the clamping and fixing of the engine cylinder head.

The end of the pressure plate 2 used to compress the cylinder head is provided with a pressure pad for contacting the cylinder head. The pressure pad is made of nylon material to prevent excessive permanent pressure deformation of the cylinder head when the clamp is clamped. The pressure pad can be replaced in time when excessive deformation occurs during multiple clamping.

As shown in Figures 1 and 2, the pressing mechanism also includes a second support column 3 vertically arranged on the base plate 5 and supporting the press plate 2 at the other end of the press plate 2, the second support column 3 is parallel to the first support column 1 , the first support column 1 is located between the second support column 3 and the support nail 6 . The second support column 3 supports the pressing plate 2 to ensure reliable clamping of the pressing plate 2 .

In order to facilitate the reliable installation of the entire fixture in the machine tool, a circular mounting hole is processed on the bottom plate 5 of the fixture, so that the device can be fixed on the machine tool in a traditional way, and a bushing 10 is installed in the mounting hole, and the bushing is worn out. When the quantity is too large, it can be replaced in time. As shown in 3, the bushing 10 has a ring-shaped structure, and the bushing 10 is embedded in the mounting hole provided on the bottom plate 5. In order to ensure the reliable fixing of the bushing 10, it can also be embedded between the bushing 10 and the inner wall of the mounting hole. A pin 11, the pin 11 makes a tight fit between the bushing 10 and the installation hole, which can prevent the bushing 10 from slipping.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (5)

1. The jig for rough milling the top surface of the cylinder head of an automobile engine comprises a bottom plate, a positioning mechanism arranged on the bottom plate and used for positioning the cylinder head, and a pressing mechanism for pressing the cylinder head. It is characterized in that: it also includes a The limit baffle on the bottom plate and distributed on the outside of the positioning mechanism, the positioning mechanism includes a number of support nails arranged on the bottom plate, the top surface of the support nails is a plane for contacting the bottom surface of the engine cylinder head. 2 . The jig for rough milling the top surface of an automobile engine cylinder head according to claim 1 , wherein three supporting nails are arranged on the top surface of the bottom plate, and the three supporting nails are arranged in a triangular shape. 3 . 3. The jig for rough milling the top surface of an automobile engine cylinder head according to claim 1 or 2, characterized in that: the limiting baffle is fixed on the top surface of the bottom plate by screws. 4. The jig for rough milling the top surface of an automobile engine cylinder head according to claim 3, characterized in that: there are multiple limit baffles, and all the limit baffles are distributed in an L shape. 5 . The jig for rough milling the top surface of an automobile engine cylinder head according to claim 4 , wherein there are three pressing mechanisms in total, and the three pressing mechanisms are arranged in a triangular shape. 6 .