Machining process for large-size pyramid

Abstract

A large-size pyramid machining technology comprises the steps that firstly, a pyramid is formed through forging according to the figure 2, and the machining amount is reserved; 2, roughly turning the pyramid on a heavy horizontal lathe to the rough turning size of the figure 1; thirdly, the pyramid subjected to rough turning is subjected to overall thermal refining; fourthly, the pyramid is subjected to finish turning on a heavy horizontal lathe to reach the finish turning drawing size in the figure 3; fifthly, pyramid surface machining is conducted on three-axis machining equipment through an indexing rotary head, and a rotary head base is manufactured to be connected with a driving rotary head and a driven rotary head; step 6, roughly adjusting and fixing the connecting line angle of the rotary head; seventhly, the precision of the rotation angle is guaranteed through an indexing rotation head; and eighthly, the rotary head base is adjusted back, and the axis of the workpiece is parallel to the X axis of the machining equipment. According to the large-size pyramid machining technology, the large-size pyramid can be effectively machined on three-axis equipment, the machining precision of the large-size pyramid is ensured, and the economical efficiency and feasibility of pyramid machining are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ring rolling machines, in particular to a large-size pyramid processing technology. Background Art

[0002] As a key component of the bulging machine of forging equipment, the pyramid is the main load-bearing structural part of the bulging machine. Its processing accuracy and matching accuracy directly affect the force distribution of the bulging machine and the forging effect of the equipment. It is widely used in ring forging operations such as ring forging shaping, inner and outer diameter bulging, and stress elimination in the ring machine. At present, the conventional processing method for pyramids in China is to process them on CNC four-axis or CNC five-axis equipment. Due to the size of the processing equipment, it is impossible to ensure that suitable CNC four-axis and five-axis processing equipment can be found for the processing of large-sized pyramids. Through traditional positioning operations such as marking, the use of three-axis equipment for processing cannot guarantee the processing accuracy, which often has a serious impact on the final uniform force distribution of the overall bulging machine, resulting in the bulging machine being unable to achieve the preset bulging force and bulging effect. Summary of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a large-size pyramid processing technology.

[0004] To achieve the above object, the technical solution of the present invention is: a large-size pyramid processing process, comprising the following steps: Step 1: Press Figure 2 Forging to form a pyramid, leaving a processing allowance, normalizing after forging, Figure 2 Check all dimensions and forging quality, test the material of the workpiece, and send it to the next process if it is qualified; Step 2: Rough turn the pyramid on a heavy horizontal lathe Figure 1 Rough turning drawing size, after inspection, sent to the next process; Step 3: Perform overall quenching and tempering treatment on the rough-turned pyramid; Step 4: Finish turning the pyramid on a heavy-duty horizontal lathe Figure 3 Precision lathe drawing dimensions to ensure the accuracy of the β° angle and shape and position tolerance at the cone, and send to the next process after passing the inspection; Step 5: Use a dividing rotary head to process the pyramid surface on a three-axis processing device, and make a rotary head base to connect the active rotary head and the driven rotary head; Step 6: Roughly adjust the angle of the rotary head connection line and fix it, clamp the pyramid, adjust the center line of the pyramid to the horizontal level, use the fine-machined β° taper to fine-tune, and adjust the rotary head base so that the fine-machined cone surface is parallel to the X-axis of the machine tool; Step 7: Ensure the rotation angle accuracy through the indexing rotary head, according to Figure 2 , rough mill 2n pyramidal surfaces symmetrically in pairs, measure whether the sizes of opposite sides are equal, and measure opposite sides to confirm that they are equally reduced and the remaining machining allowances are the same; Step 8: Adjust the turret base so that the workpiece axis is parallel to the X-axis of the processing equipment. Figure 2 Symmetrical milling of 2n faces at nC according to the drawing, after passing the inspection, they will be sent to the next process; Step 9. Use a heavy-duty horizontal lathe to align the two end faces of the workpiece, process the end face lifting holes, check all dimensions, and put them into storage after passing the inspection.

[0005] Furthermore, after step 7 is completed, semi-finishing milling and finishing milling are performed. During semi-finishing milling, the finishing milling margin is ensured and the dimensions of the opposite sides are measured to see if they are equal. During finishing milling, 2n faces are symmetrically milled to Figure 2 Drawing dimensions, check pyramid surface dimensions.

[0006] Furthermore, the finishing allowance is 0.3-0.5 mm.

[0007] Furthermore, in step six, the angle of the swivel head line is roughly adjusted until the swivel head line and the X-axis of the processing equipment are tilted by 0.5β° and then fixed.

[0008] Compared with the existing pyramid processing technology, the present invention has the following advantages: 1. Steps one to four include forging, rough turning, heat treatment, and fine turning. Information such as the position of the pyramid surface does not need to be considered. This step can be processed on an ordinary heavy-duty horizontal lathe.

[0009] 2. Step six: Through the precision turning of the taper β° and the positioning conversion of the circumference, the accurate positioning of the large-sized pyramid can be effectively ensured, providing guarantee for the subsequent pyramid surface processing accuracy.

[0010] 3. Step 7: Use the indexing rotary head to ensure the accuracy of the rotation angle, ensure that the 2n pyramidal faces of the processed pyramid are symmetrical and evenly distributed, and ensure the use effect of the pyramid after assembly. Compared with traditional positioning operations such as marking, the positioning processing accuracy is high and the processing shape and position tolerance is guaranteed.

[0011] 4. Steps 5 and 8, through positioning conversion and the guarantee of the swivel head rotation angle, can realize the effective and accurate processing of 2n-sided pyramids on ordinary three-axis processing equipment, which can only be achieved by CNC four-axis and five-axis equipment, effectively reducing processing costs, improving processing convenience, and avoiding the situation where large-sized pyramids cannot be processed due to the size of CNC four-axis and five-axis processing equipment.

[0012] Through the large-size pyramid processing technology of the present invention, large-size pyramids can be effectively processed on three-axis equipment, ensuring the processing accuracy of large-size pyramids, avoiding the purchase of large-scale CNC four-axis and five-axis processing equipment, improving the economy and feasibility of pyramid processing, and reducing the difficulty of processing key components of domestic large-scale bulging machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will now be further described with reference to the accompanying drawings.

[0014] Figure 1 This is the rough turning diagram of the 2n-sided pyramid of the present invention; Figure 2 This is a product diagram of a 2n-sided pyramid according to the patent of the present invention; Figure 3 This is the precision turning diagram of the 2n-sided pyramid of the patent of this invention. DETAILED DESCRIPTION

[0015] like Figure 1-3 As shown, a large-size pyramid processing process includes the following steps: Step 1: Press Figure 2 Forging to form a pyramid, leaving a processing allowance, normalizing after forging, Figure 2 Check all dimensions and forging quality, test the material of the workpiece, and send it to the next process if it is qualified; Step 2: Rough turn the pyramid on a heavy horizontal lathe Figure 1 Rough turning drawing size, after inspection, sent to the next process; Step 3: Perform overall quenching and tempering treatment on the rough-turned pyramid; Step 4: Finish turning the pyramid on a heavy-duty horizontal lathe Figure 3 Precision lathe drawing dimensions to ensure the accuracy of the β° angle and shape and position tolerance at the cone, and send to the next process after passing the inspection; Step 5: Use a dividing rotary head to process the pyramid surface on a three-axis processing device, and make a rotary head base to connect the active rotary head and the driven rotary head; Step 6: Roughly adjust the angle of the swivel head connection line and fix it, and roughly adjust the angle of the swivel head connection line until the swivel head connection line and the X-axis of the processing equipment are tilted by 0.5β° and then fixed, clamp the pyramid, adjust the center line of the pyramid to the level, use the fine-machined β° taper fine adjustment, and adjust the swivel head base to make the fine-machined cone surface parallel to the X-axis of the machine tool; Step 7: Ensure the rotation angle accuracy through the indexing rotary head, according to Figure 2 , rough mill 2n pyramidal faces symmetrically in pairs, measure whether the opposite sides are equal, measure the opposite sides to confirm that they are equal, and the remaining machining allowances are the same, and then go through semi-finishing milling and finishing milling. Ensure the finishing allowance during semi-finishing milling, and the finishing allowance is 0.3-0.5mm. Measure whether the opposite sides are equal; during finishing milling, symmetrically mill 2n faces to Figure 2 Drawing dimensions, check pyramid surface dimensions; Step 8: Adjust the turret base so that the workpiece axis is parallel to the X-axis of the processing equipment. Figure 2 Symmetrical milling of 2n faces at nC according to the drawing, after passing the inspection, they will be sent to the next process; Step 9. Use a heavy-duty horizontal lathe to align the two end faces of the workpiece, process the end face lifting holes, check all dimensions, and put them into storage after passing the inspection.

[0016] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A large-size pyramid processing technology, characterized in that: The following steps are involved: Step 1: Forge a pyramid according to Figure 2, and leave a processing allowance. Normalize after forging. Check all dimensions and forging quality according to Figure 2, test the material of the workpiece, and send it to the next process if it is qualified; Step 2: Rough turn the pyramid on a heavy horizontal lathe to the rough turning size shown in Figure 1, and send it to the next process after passing the inspection; Step 3: Perform overall quenching and tempering treatment on the rough-turned pyramid; Step 4: Finish-turn the pyramid on a heavy-duty horizontal lathe to the dimensions shown in Figure 3, ensuring that the β° angle and shape and position tolerances at the cone are accurate, and after passing the inspection, it will be sent to the next process; Step 5: Use a dividing rotary head to process the pyramid surface on a three-axis processing device, and make a rotary head base to connect the active rotary head and the driven rotary head; Step 6: Roughly adjust the angle of the rotary head connection line and fix it, clamp the pyramid, adjust the center line of the pyramid to the horizontal level, use the fine-machined β° taper to fine-tune, and adjust the rotary head base so that the fine-machined cone surface is parallel to the X-axis of the machine tool; Step 7: Ensure the accuracy of the rotation angle by using the indexing rotary head. According to Figure 2, rough mill 2n pyramidal surfaces symmetrically in pairs, measure whether the sizes of the opposite sides are equal, and measure the opposite sides to confirm that they are equally reduced and the remaining machining allowances are the same; Step 8: Adjust the turret base to make the workpiece axis parallel to the X-axis of the processing equipment, and symmetrically mill 2n faces at nC according to the drawing in Figure 2. After passing the inspection, send it to the next process; Step 9. Use a heavy-duty horizontal lathe to align the two end faces of the workpiece, process the end face lifting holes, check all dimensions, and put them into storage after passing the inspection.

2. A large-size pyramid processing process as claimed in claim 1, characterized in that: After step seven, semi-finishing milling and finishing milling are carried out. During semi-finishing milling, ensure the finishing margin and measure whether the sizes of opposite sides are equal. During finishing milling, 2n faces are symmetrically milled to the size of Figure 2 and the size of the pyramid surface is checked.

3. A large-size pyramid processing process as claimed in claim 2, characterized in that: The finishing allowance is 0.3-0.5mm.

4. A large-size pyramid processing process as claimed in claim 1, characterized in that: In step six, the angle of the rotary head connection line is roughly adjusted until the rotary head connection line and the X-axis of the processing equipment are tilted by 0.5β° and then fixed.

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