2 yield. In response to this, we have developed a new kind of fire equipment.
1 Parts of the process analysis M more than 5mm, size 305 on both sides of the unilateral processing margin of 6.5 workpiece at both ends of the 095-hole concentricity of 1mm, size 305 between the two sides of the parallelism of 0.25mm.
Extra time, one piece of pressure between the table, turn center. When the table is moved along the guide rail to the extreme position of the power end, the workpiece of the trampoline power head 13 remains. Section from the leave. Thus, in the semi-finishing and fine boring of the 95H8 hole, there must be concentricity between the boring and the hole. The boring bar must pass through the near hole to cut the far hole, and the boring bar cantilever long and rigid. Insufficient, resulting in vibration of the cutter head, resulting in the roughness of the processing surface can not meet the requirements. Particularly suitable for milling 97 missing U, the mast vibration is particularly strict 1. On the other hand, due to the rigid limit of the mast, when the rough processing, the knife is set smaller, affecting the increase of cattle production efficiency.
Therefore, the key is to solve the problem of mast vibration in the connecting rod machining process. Based on this, we put one piece and press it firmly on the jaw surface. At the same time, the crucible clamp is fastened to the edge of the table of the trampoline 2 to shorten the overhang of the mast and improve the rigidity of the mast. The position of the middle mast is not suitable for the vibration of the mast. ! The cause of the mustard causes cracks in the cylinder liner and causes the water to enter the bottom. 4 Cylinder gasket is damaged or there is a crack in the cylinder head valve seat and water leaks. This leaking feature is the return of water to the tank. 5 Due to the injector cooling water, it is leaking due to damage. This leakage is relatively small, but it can be detected by the leak test of the cylinder head. The water leakage of the 6-cylinder or cylinder head water channel due to the presence of trachoma.
Inward leak detection method In determining the location of the leak, we must first understand the structure of the cooling system of the model, then fill the tank with water, open the oil pan, and observe from the lower part of the crankshaft. If it is the time to appeal to the wheel! Water seepage, then it can be determined that the foot pump water seal damage refers to the wheel transmission type; if other parts seepage, you can determine the leakage point of the relevant part according to the actual situation. At the same time, open the cover of the parent door and observe if the water plug in the cylinder head leaks. Then, find the leak point quickly.
3 Oil and water mixing When the oil is found to be thrown out of water and organic oil, it can be considered that the oil passage and the water passage are in communication. The general situation is that the oil radiator is damaged and the history can be changed. In severe cases, the machine body water channel and the machine channel may be cracked. At this time, the sudden emergence of organic oil from the tank, while the cooling water in the oil pan, only to replace the cylinder can solve the problem.
The above method is to determine whether the engine is leaking. However, the most basic means is that it must be familiar with the structure of the machine. Do not tamper with the tamper. You should carefully scrutinize it so that you can find the leak quickly and accurately and quickly solve.
Process. equipment. Material 2 Fixture Structure The clip has a 180-point note function from 3.
Its structure is mainly composed of the clamping device 4 base 7 rotary device 8 pallet 9 positioning device and unloading device 6 and several other major components.
The base 7 is oriented by the guide key 5 in the D-shaped groove of the boring table, and the screw block 13 and the countersunk bolt are fastened on the rim of the boring table. Position and clamp one piece using the positioning device stopper 12 and the clamping device 4; adjust the floating positioning pin 5 so that it comes into contact with the workpiece and use the rod! Pull rod 2 Pressure plate 3 Positioning nail 6 Positioning block and nut Press the workpiece tightly.
Positioning, 1. Positioning block 2. Stopper 13. Screw block 14. Bolt 15. Floating positioning screw 16. Unloading device 2.1 Positioning device Adoption, floating positioning 4. The slider 17 is notched in the middle to allow opening. The ribs on the piece, the slider can be rotated around the shaft 18 to eliminate the casting error and ensure that both parts can contact. The entire device is bolted to the pallet with a cylindrical pin.
2.2 Clamping Device The clamping device 5 is composed of the slider 20 and the slider 22 and the bracket 23 of the screw block 21 . It is fastened to the pallet 9 with 4 bolts. The old block is screwed to the screw. When compacted, the pressure block can swing without turning, increasing the contact surface for compression and preventing a cow from producing indentation.
2.3 Clamp 180 degree rotation positioning 7. Base 9. Pallet positioning block shaft 7. Base 9. Pallet 2 Clamp screw bar 23. Position the bracket bush 24. Then, the pallet 9 and the base 7 are fastened with 4 bolts. When the workpiece needs to be turned 18, the bolt is loosened and the bolt 14 is pulled out. The pallet 9 carries the main body of the fixture and the workpiece around the shaft 35 in the rotary device, ie, rotates and rotates around the center of rotation 80, and turns the head.
7. Base 9. Support plate 14. Bolt 24. Bushing 2.4 Unloading device Unloading device 7 consists mainly of adjusting bolts 25 Screw plate 26 Bearing 27 Slide 28 Pin 29 Bearing 30 Spring 31 . There are a total of six unloading devices, all of which are distributed in rotary process equipment. The center of the material center is on the distribution circle. The slide 28 and the bearing 30 pass through the holes in the bracket 9 to contact the bearing 30 with the base 7, and the bearing 30 rolls along the tangential line of the rotation distribution circle to change the nature of the frictional force. friction. The adjusting bolt 25 is used to adjust the pressure of the spring 31 so that the clamp body and the base 7 can be balanced to disengage the two seats 27 and the slide seat 28 can be used for sliding and matching with a square hole to guide the direction of the bearing.
Into the base 9. Pallet 25. Adjusting bolt 26. Screw plate 27. Bearing 28. Slide 29. Pin shaft 30. Bearing 31. Spring 2.5 Swivel mechanism Swivel device 8 Cover plate 32 Bearing 33 Limiting plate 34 Shaft 35 baffle 36 and other components. The cover plate 32 prevents dust and the like from entering the bearing 33 and bites or seizes the bearing. The clearance between the bearing outer ring and the bracket 9 is clearance fit. The pallet 9 can be moved upwards out of the base 7120 under the action of the spring of the unloading device to reduce the rotational friction. The limiting pad 32 is used to prevent the pallet 9 and the base 7 from being separated when lifting.
3 Manufacturing Difficulties and Solutions The manufacturing difficulty of this jig is to ensure 180-turn accuracy. The key is the parallelism between the two ends of the dimension 305. The solution is to mill two parallel reference planes 86 on both sides of the base 7; use the edges of the pallet 9 as a measurement reference; drill 287 holes at the end of the pallet 9 and insert a bushing 24 Inner hole 02,7, outer circle 028 dip, material D to find the side of the positive pallet 9 to make it parallel to the base 7's reference person; screw construction machinery, 200017. base 9. pallet 32. cover 33. bearing 34 Limiting plate 35. Axle 36. Baffle Tighten the bolt so that the bracket 9 and the base 7 are combined into a body; a hole of 22817 on the bracket plate 9 is set in the bushing; similarly, the bracket 9 is rotated 180 degrees around the rotation center. Align the 0 side and make it parallel to the reference 8, and process 180 other boring holes positioned on the pedestal 7, then insert the bush. In this way, the concentricity of the upper and lower bushings is ensured, and the latches can be smoothly inserted into positions. At the same time, the positioning accuracy of the U-turn 180 is also ensured.
The use of two years proves that the fixture is flexible and easy to operate. The positioning of 180 turns is accurate, and the parallelism of 305 ends can be achieved. During machining, there is no vibration in the boring bar, and no holes are formed in the processed hole and surface. In addition, when the rough processing can increase the amount of knife to increase production efficiency, and achieved good results.
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