Positioning tool for machining engine cylinder cover

Abstract

The utility model provides a positioning tool for machining an engine cylinder cover, which belongs to the field of engine cylinder cover positioning and comprises a base and two groups of fixing blocks arranged on the base, hydraulic cylinders are arranged on the side walls of the two groups of fixing blocks, and the output ends of the two groups of hydraulic cylinders are connected with clamping plates. The cooling mechanism can cool the clamping plate and the machining position of the air cylinder cover at the same time, the cooling mechanism is arranged, the snake-shaped cooling channel can prolong the flowing time of cooling liquid in the clamping plate, and therefore the cooling effect on the clamping plate is improved, and the machining precision of the air cylinder cover is improved. And the situation that the clamping effect of the clamping plate on the workpiece is affected by heat generated during machining is avoided, and the machining precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine cylinder head positioning, and more specifically, to a positioning fixture for engine cylinder head machining. Background Technology

[0002] The engine cylinder head is mounted on top of the cylinder block, sealing the cylinder from above and forming the combustion chamber. It is constantly in contact with high-temperature, high-pressure combustion gases, and therefore bears significant thermal and mechanical loads. In water-cooled engines, the cylinder head has an internal cooling water jacket, and the cooling water holes on the lower end face of the cylinder head communicate with the cooling water holes in the cylinder block.

[0003] When machining engine cylinder heads, positioning fixtures are required to fix them. Currently, most positioning fixtures use clamping plates and hydraulic cylinders for positioning. However, during machining, the heat from cutting can cause the positioning device to heat up, and temperature changes can cause positioning errors, thus affecting the clamping effect of the clamping plate on the workpiece. Consequently, the workpiece may shift during machining, affecting machining accuracy. How to invent a positioning fixture for engine cylinder head machining to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a positioning fixture for engine cylinder head machining, aiming to improve the current positioning fixtures that mostly use clamping plates and hydraulic cylinders for positioning. However, during machining, the cutting heat will cause the positioning device to heat up, and the temperature change will cause positioning errors, thereby affecting the clamping effect of the clamping plate on the workpiece. As a result, the workpiece will be displaced during machining, affecting the machining accuracy.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a positioning fixture for machining engine cylinder head, including a base and two sets of fixing blocks disposed on the base. The side walls of the two sets of fixing blocks are provided with hydraulic cylinders, and the output ends of the two sets of hydraulic cylinders are connected to clamping plates. It also includes a cooling mechanism: the cooling mechanism is disposed on the base, and the cooling mechanism can cool the clamping plates and the machining area of ​​the cylinder head at the same time.

[0007] Preferably, the cooling mechanism includes a liquid infusion ring pipe on the base, an inlet pipe on the outer wall of the liquid infusion ring pipe, two sets of connecting pipes on the outer wall of the liquid infusion ring pipe, cooling channels opened inside the two sets of clamping plates, one end of the connecting pipe being connected to one end of the cooling channel, a universal bamboo joint cooling pipe connected to the cooling channel being provided on the top of the clamping plate, and a nozzle being provided at one end of the universal bamboo joint cooling pipe.

[0008] Preferably, the cooling channel is arranged in a snake shape.

[0009] Preferably, the connecting pipe is a flexible hose and is made of plastic material.

[0010] Preferably, the sidewall of the clamping plate is provided with an anti-slip coating, and the surface of the clamping plate is coated with a ceramic-based heat dissipation coating.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model, by setting up a cooling mechanism, uses a snake-shaped cooling channel to increase the flow time of the coolant within the clamping plate, thereby improving the cooling effect on the clamping plate and preventing the heat generated during processing from affecting the clamping effect of the clamping plate on the workpiece, thus improving processing accuracy. After flowing in the cooling channel, the coolant enters the universal bamboo-joint cooling pipe and is sprayed out through the nozzle to cool the processed area of ​​the cylinder head. The universal bamboo-joint cooling pipe can be adjusted at any angle to ensure that the coolant can be accurately sprayed onto the processed area, improving the cooling effect on the engine cylinder head processing.

[0013] 2. By setting an anti-slip coating, this utility model can increase the friction between the clamping plate and the cylinder head, preventing the cylinder head from sliding during processing. At the same time, the ceramic-based heat dissipation coating can help the clamping plate dissipate some heat, further improving the cooling effect of the clamping plate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0017] Figure 3 This is a schematic diagram of the cooling chamber structure of this utility model.

[0018] In the diagram: 1. Base; 2. Cooling mechanism; 200. Liquid inlet ring pipe; 201. Liquid inlet pipe; 202. Universal bamboo joint cooling pipe; 203. Nozzle; 204. Connecting pipe; 205. Cooling channel; 3. Clamping plate; 4. Fixing block; 5. Hydraulic cylinder. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example, refer to Figures 1-3 A positioning fixture for machining an engine cylinder head includes a base 1 and two sets of fixing blocks 4 mounted on the base 1. Each set of fixing blocks 4 has a hydraulic cylinder 5 mounted on its sidewall. The output ends of each set of hydraulic cylinders 5 are connected to a clamping plate 3. The sidewall of the clamping plate 3 has an anti-slip coating, and the surface of the clamping plate 3 is coated with a ceramic-based heat-dissipating coating. The anti-slip coating on the sidewall of the clamping plate 3 increases the friction between the clamping plate 3 and the cylinder head, preventing the cylinder head from sliding during machining. Simultaneously, the ceramic-based heat-dissipating coating on the surface of the clamping plate 3 helps dissipate some heat. The fixture also includes a cooling mechanism 2 mounted on the base 1. The cooling mechanism 2 can cool the clamping plate 3 and the machined area of ​​the cylinder head simultaneously.

[0021] The cooling mechanism 2 includes a liquid inlet ring pipe 200 on the base 1, an inlet pipe 201 on the outer wall of the liquid inlet ring pipe 200, and two sets of connecting pipes 204 on the outer wall of the liquid inlet ring pipe 200. The connecting pipes 204 are telescopic flexible hoses made of plastic material. Cooling channels 205 are opened inside the two sets of clamping plates 3. One end of the connecting pipe 204 is connected to one end of the cooling channel 205. The top of the clamping plate 3 is provided with a universal bamboo joint cooling pipe 202 that communicates with the cooling channel 205. One end of the universal bamboo joint cooling pipe 202 is provided with a nozzle 203.

[0022] It should be noted that the connecting pipe 400 is a telescopic hose that can extend and retract with the movement of the clamping plate 3, delivering coolant to the cooling channel 305 inside the clamping plate 3. The coolant enters the universal bamboo joint cooling pipe 202 and is sprayed out through the nozzle 203 to cool the machined area of ​​the cylinder head. The universal bamboo joint cooling pipe 202 can be adjusted at any angle to ensure that the coolant can be accurately sprayed onto the machined area.

[0023] The cooling channel 205 is arranged in a snake shape.

[0024] It should be noted that this can increase the flow time of the coolant in the cooling channel 205, thereby improving the cooling effect on the clamping plate 3 and preventing the heat generated during processing from affecting the clamping effect of the clamping plate 3 on the workpiece.

[0025] Working principle: The engine cylinder head is placed on the base 1 of the positioning fixture, and the hydraulic cylinder 5 is activated. The output end of the hydraulic cylinder 5 pushes the clamping plate 2 to move towards the cylinder head and clamp it in place. Then, the coolant enters the delivery ring pipe 200 through the inlet pipe 201. The delivery ring pipe 200 distributes the coolant into two sets of connecting pipes 400. The connecting pipes 400 are telescopic hoses that can extend and retract with the movement of the clamping plate 3, delivering the coolant to the cooling channel 305 inside the clamping plate 3. The cooling channel 205 is serpentine in shape, which increases the flow time of the coolant in the channel and improves the cooling effect on the clamping plate. After flowing in the cooling channel 205, the coolant enters the universal bamboo joint cooling pipe 202 and is sprayed out through the nozzle 203 to cool the machined area of ​​the cylinder head. The universal bamboo joint cooling pipe 202 can be adjusted at any angle to ensure that the coolant can be accurately sprayed onto the machined area.

[0026] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for machining an engine cylinder head, comprising a base (1) and two sets of fixing blocks (4) disposed on the base (1), wherein each set of fixing blocks (4) has a hydraulic cylinder (5) on its side wall, and each set of hydraulic cylinders (5) has a clamping plate (3) connected to its output end, characterized in that, Also includes: Cooling mechanism (2): The cooling mechanism (2) is set on the base (1). The cooling mechanism (2) can cool the clamping plate (3) and the machined part of the cylinder head at the same time.

2. The positioning fixture for machining an engine cylinder head according to claim 1, characterized in that, The cooling mechanism (2) includes a liquid inlet pipe (200) provided on the base (1). The outer wall of the liquid inlet pipe (200) is provided with an inlet pipe (201). The outer wall of the liquid inlet pipe (200) is provided with two sets of connecting pipes (204). Cooling channels (205) are opened inside the two sets of clamping plates (3). One end of the connecting pipe (204) is connected to one end of the cooling channel (205). The top of the clamping plate (3) is provided with a universal bamboo joint cooling pipe (202) connected to the cooling channel (205). One end of the universal bamboo joint cooling pipe (202) is provided with a nozzle (203).

3. The positioning fixture for machining an engine cylinder head according to claim 2, characterized in that, The cooling channel (205) is arranged in a snake shape.

4. A positioning fixture for machining an engine cylinder head according to claim 2, characterized in that, The connecting pipe (204) is a flexible hose and is made of plastic material.

5. A positioning fixture for machining an engine cylinder head according to claim 1, characterized in that, The clamping plate (3) has an anti-slip coating on its side wall and a ceramic-based heat dissipation coating on its surface.

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