Auxiliary device for machining eccentric bore structure of packer body

Abstract

The utility model relates to the technical field of machining, specifically relates to a kind of auxiliary device for processing packer body eccentric hole structure, including outer tube, the packer body to be processed is placed in outer tube, further include end cap assembly and eccentric weight, the end cap assembly installs the both ends of outer tube, eccentric weight is located in the inside of outer tube, eccentric weight is connected on the inside wall of outer tube, when working, the packer body to be processed is placed in outer tube, the part outside of the packer body to be processed and eccentric weight are provided with gap, the packer body to be processed is eccentric relative to outer tube, end cap assembly is installed the both ends of outer tube by fastener, and the workpiece to be processed is positioned.The utility model is applicable to the machining of the eccentric hole structure of various cylindrical parts turning in various industries, provides standardized solution for the machining of eccentric hole structure, low in processing equipment and operator requirement, can realize low cost high income.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to an auxiliary device for machining the eccentric hole structure of a packer body, which is applicable to the machining of eccentric hole structures of various cylindrical parts in various industries. Background Technology

[0002] In today's rapidly developing industries and constantly evolving products, eccentric hole structures, with their unique functional characteristics, have found widespread application in numerous product fields. For example, in some mechanical transmission components, hydraulic elements, and the packer body discussed in this article, eccentric hole structures play a crucial role, and their processing quality directly affects the overall performance and reliability of the products.

[0003] However, traditional methods still dominate the machining of eccentric hole structures in cylindrical parts, such as indexing heads, scribing, and four-jaw single-action chucks. But these traditional machining methods have gradually revealed many significant shortcomings in practical applications.

[0004] On the one hand, these traditional methods place high demands on the precision and performance of the processing equipment. Taking indexing head processing as an example, the indexing accuracy of the indexing head directly affects the positional accuracy of the eccentric hole. If the equipment itself lacks precision or wears out after long-term use, it is very easy for the positional deviation of the machined eccentric hole to be too large, failing to meet the product design requirements. On the other hand, when clamping a workpiece, a four-jaw single-action chuck requires the operator to manually adjust the position of each jaw based on experience to achieve eccentric positioning of the workpiece. This not only places high demands on the precision of the chuck, but the operation process is also cumbersome, and the slightest carelessness can affect the clamping accuracy.

[0005] On the other hand, traditional machining methods are highly dependent on the operator's skill level and experience. Scribing requires the operator to possess superb scribing skills, accurately marking the position lines of eccentric holes on the surface of cylindrical parts. Furthermore, in subsequent drilling and boring processes, the operator must strictly adhere to the scribing lines; any minor operational error can lead to machining inaccuracies. When using a four-jaw single-action chuck, the operator must precisely control the movement of each jaw to achieve the required eccentric state for the workpiece. This requires extensive practical experience and skilled operation; otherwise, it is difficult to guarantee the accuracy and stability of the clamping.

[0006] Furthermore, traditional machining methods are extremely inefficient. Indexing head machining requires significant time for positioning and adjustment when performing indexing operations at different angles; scribing, inspection, and correction processes are cumbersome, and re-scrubbing is necessary before each machining operation, greatly increasing the machining cycle time; and repeatedly adjusting the jaw positions when clamping workpieces with a four-jaw single-action chuck also consumes a considerable amount of time. In today's market environment that pursues high-efficiency production, this inefficient machining method clearly cannot meet the demands of large-scale mass production.

[0007] Traditional processing methods are highly susceptible to equipment and operational factors, resulting in poor product quality stability. Different batches of products, and even different workpieces within the same batch, may exhibit inconsistencies in parameters such as eccentric hole position accuracy and dimensional accuracy due to differences in equipment condition and operator skill levels. This severely impacts the overall quality and consistency of the products, posing significant challenges to production management and product quality control for enterprises.

[0008] In summary, existing traditional machining methods for processing eccentric hole structures in cylindrical parts have many problems, such as high requirements for machining equipment and operators, low processing efficiency, and poor product quality stability. They are difficult to apply in mass production. Therefore, there is an urgent need for a new machining method and tooling to solve these problems. Utility Model Content

[0009] In view of the shortcomings of the existing background technology, the purpose of this utility model is to provide an auxiliary device for processing the eccentric hole structure of the packer body that is simple in structure and easy to use. It is applicable to the processing of eccentric hole structures of various cylindrical parts in various industries, provides a standardized solution for the processing of eccentric hole structures, has low requirements for processing equipment and operators, and can achieve low cost and high returns.

[0010] To achieve the above, the technical solution of this utility model is as follows: an auxiliary device for processing the eccentric hole structure of a packer body, including an outer cylinder, in which the packer body to be processed is placed, and also including an end cap assembly and an eccentric block. The end cap assembly is installed at both ends of the outer cylinder, and the eccentric block is located inside the outer cylinder and connected to the inner wall of the outer cylinder. During operation, the packer body to be processed is placed in the outer cylinder, and a gap is provided between a portion of the outer surface of the packer body to be processed and the eccentric block. The packer body to be processed is eccentric relative to the outer cylinder. The end cap assembly is installed at both ends of the outer cylinder by fasteners to position the workpiece to be processed.

[0011] Furthermore, the offset block has an arc-shaped structure, with both the outer and inner sides of the offset block being arc surfaces. The outer side of the offset block is in contact with the inner wall surface of the outer cylinder, and the offset block is fixedly installed on the inner wall of the outer cylinder by fasteners.

[0012] Furthermore, the length of the eccentric block is less than the length of the outer cylinder.

[0013] Furthermore, the end cap assembly includes two upper end caps and two lower end caps. Each end of the outer cylinder is provided with an upper end cap and a lower end cap. The upper end caps and lower end caps are connected together by fasteners to form an integral end cap structure.

[0014] Furthermore, both the upper and lower end caps are provided with arc-shaped holes, the diameters of which are equal. When the upper and lower end caps are connected together, the two arc-shaped holes form a single circular hole.

[0015] Furthermore, the outer diameter of the upper end cover is equal to the outer diameter of the lower end cover, and the inner diameter of the upper end cover is equal to the inner diameter of the lower end cover. The upper end cover is smaller than a semicircle, and the lower end cover is larger than a semicircle. A reference line is drawn on the lower end cover through the center line of the outer diameter of the outer cylinder to form a reference line.

[0016] Furthermore, the lower end cap is assembled onto the end face of the outer cylinder by a locating pin and fixed by a set screw, and the upper end cap mates with the lower end cap and is installed on the end face of the outer cylinder by a set screw.

[0017] Furthermore, the eccentric block is located inside the outer cylinder within the area surrounded by the lower end cap.

[0018] Furthermore, the upper end cover and the lower end cover are connected by screws. At the contact point between the upper end cover and the lower end cover, the lower end cover is provided with a threaded hole and the upper end cover is provided with a through hole. The screw passes through the through hole on the upper end cover and is fastened to the threaded hole on the lower end cover. The corresponding position of the through hole on the upper end cover is provided with an L-shaped groove, and the bottom of the screw nut is in contact with the plane of the L-shaped groove.

[0019] The advantages of adopting the technical solution of this utility model are:

[0020] 1. This utility model is applicable to the machining of eccentric hole structures in various cylindrical parts in various industries. It provides a standardized solution for machining eccentric hole structures, with low requirements for machining equipment and operators, and can achieve low cost and high returns.

[0021] 2. The outer cylinder of this utility model is equipped with an eccentric block, which can achieve precise counterweighting of the tooling, balance the centrifugal force during processing, and ensure the accuracy and quality of processing; by changing the eccentric block, parts with the same eccentricity and outer diameter but different eccentric weights can be processed; by changing the upper and lower end caps, parts with the same eccentric weight but different eccentricities or different outer diameters can be processed; by changing the upper and lower end caps and the eccentric block, parts with different eccentricities can be processed.

[0022] 3. This utility model adopts a new structure auxiliary device that enables mass production of products, achieves rapid product positioning and error control, improves product processing quality and efficiency, provides a standardized solution for the processing of eccentric hole structures, has low requirements for processing equipment and operators, and can achieve low cost and high returns.

[0023] 4. The successful application of this auxiliary device has greatly increased the production capacity of horizontal machining centers. The machining efficiency for turning such products is far higher than that of horizontal machining centers, and it also solves the problem of machining parts of eccentric structures that horizontal machining centers cannot process, such as special threads. Furthermore, it eliminates the reliance on lathes with adjustable four-jaw chucks. Before the application of this auxiliary device, the eccentric structures of such products were all machined by horizontal machining centers or large lathes, using outsourcing. Because these products have large outer diameters, the investment in lathes used for machining them was also relatively large. After the successful development of this auxiliary device, ordinary lathes can be used to machine these products, saving enterprises a huge amount of investment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the auxiliary device of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the auxiliary device of this utility model;

[0027] Figure 3 This is a schematic diagram of the end structure of the auxiliary device of this utility model.

[0028] The markings in the above figure are as follows: 1. Outer cylinder; 2. Upper end cover; 21. L-shaped groove; 3. Lower end cover; 31. Baseline; 4. Locating pin; 5. Offset block; 6. Packer body; 61. Alignment line; 7. Screw. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] like Figure 1 , 2 As shown, an auxiliary device for machining eccentric hole structures in packer bodies includes an outer cylinder 1, in which the packer body to be machined is placed. It also includes an end cap assembly and an eccentric block 5. The end cap assembly is installed at both ends of the outer cylinder 1, and the eccentric block 5 is located inside the outer cylinder 1 and connected to the inner wall of the outer cylinder 1. During operation, the packer body 6 to be machined is placed in the outer cylinder 1, with a gap between a portion of the outer surface of the packer body 6 and the eccentric block 5, achieving eccentricity relative to the outer cylinder 1. The end cap assembly is fastened to both ends of the outer cylinder 1 to position the workpiece. This invention is applicable to machining eccentric hole structures in various cylindrical parts in different industries, providing a standardized solution for machining eccentric hole structures. It has low requirements for machining equipment and operators, achieving low cost and high returns.

[0032] The offset block 5 is an arc-shaped block structure. Both the outer and inner surfaces of the offset block 5 are arc surfaces. The outer surface of the offset block 5 is in contact with the inner wall surface of the outer cylinder 1. The offset block 5 is fixedly installed on the inner wall of the outer cylinder 1 by fasteners. The length of the offset block 5 is less than the length of the outer cylinder 1.

[0033] The end cap assembly includes two upper end caps 2 and two lower end caps 3. One upper end cap 2 and one lower end cap 3 are respectively located at each end of the outer cylinder 1. The upper end caps 2 and lower end caps 3 are connected together by fasteners to form the overall end cap structure. Both the upper end caps 2 and lower end caps 3 have arc-shaped holes of equal diameter. When the upper end caps 2 and lower end caps 3 are connected, the two arc-shaped holes face each other to form a circular hole 8. The processing machine processes the packer body 6 to be processed through this circular hole 8.

[0034] The outer diameter of the upper end cover 2 is equal to the outer diameter of the lower end cover 3, and the inner diameter of the upper end cover 2 is equal to the inner diameter of the lower end cover 3. The upper end cover 2 is smaller than a semicircle, and the lower end cover 3 is larger than a semicircle. A reference line 31 is formed by tracing a line through the center line of the outer diameter of the outer cylinder 1 on the lower end cover 3. When assembling the workpiece, aligning the tracing line on the end face of the workpiece passing through the center of the eccentric hole with the reference line 31 on the lower end cover will achieve precise positioning of the workpiece.

[0035] The lower end cover 3 is assembled to the end face of the outer cylinder 1 by a locating pin 4 and fixed by a set screw. The upper end cover 2 mates with the lower end cover 3 and is installed on the end face of the outer cylinder 1 by a set screw. The eccentric block 5 is located inside the outer cylinder 1 within the area surrounded by the lower end cover 3.

[0036] The upper end cover 2 and the lower end cover 3 are connected by screws 7. At the contact point between the upper end cover 2 and the lower end cover 3, the lower end cover 3 is provided with a threaded hole, and the upper end cover 2 is provided with a through hole. The screw 7 passes through the through hole on the upper end cover 2 and is fastened to the threaded hole on the lower end cover 3, thereby achieving a tight connection between the upper end cover 2 and the lower end cover 3. The corresponding position of the through hole on the upper end cover 2 is provided with an L-shaped groove. The bottom of the nut of the screw 7 fits against the plane of the L-shaped groove, increasing the contact area and strengthening the connection.

[0037] This utility model has an eccentric block inside the outer cylinder, which can achieve precise counterweighting of the tooling, balance the centrifugal force during processing, and ensure the accuracy and quality of processing. By changing the eccentric block, parts with the same eccentricity and outer diameter but different eccentric weights can be processed. By changing the upper and lower end caps, parts with the same eccentric weight but different eccentricities or different outer diameters can be processed. By changing the upper and lower end caps and the eccentric block, parts with different eccentricities can be processed.

[0038] This utility model adopts a new structure auxiliary device to realize the mass production of products, achieve rapid product positioning and error control, improve product processing quality and efficiency, provide a standardized solution for the processing of eccentric hole structures, and has low requirements for processing equipment and operators, thus achieving low cost and high returns.

[0039] Based on the aforementioned auxiliary device for processing the eccentric hole structure of the packer body, this utility model also relates to a processing method for processing the eccentric hole structure of the packer body, the processing method being as follows:

[0040] Step a: Based on the eccentricity, outer diameter, and eccentric weight of the packer body 6 to be processed, select the matching upper end cap, lower end cap, and counterweight block. The outer cylinder is a general tooling module.

[0041] Step b: Install the counterweight into the outer cylinder and fix it to the outer cylinder with screws;

[0042] Step c: Connect the lower end cap to the outer cylinder with locating pins to achieve precise positioning of the lower end cap and ensure accurate eccentricity. After positioning, fix the lower end cap to the outer cylinder with assembly screws. After the lower end caps at both ends of the outer cylinder are fixed, install the packer body 6 to be processed into the outer cylinder. There is a gap between the packer body 6 to be processed and the eccentric block 5. The reference line 31 has been marked according to the eccentricity during the processing of the lower end cap. The alignment line 61 has also been marked according to the eccentricity during the horizontal machining process of the workpiece. At this time, adjust the position of the packer body 6 to be processed so that the alignment line 61 of the packer body 6 is aligned with the reference line 31 on the lower end cap, ensuring that the center of the eccentric hole is coaxial with the center of the tooling, and achieving precise positioning.

[0043] Step d: After determining the position of the packer body 6 to be processed, install the upper end cap onto the outer cylinder. Do not tighten the screws yet. First, tighten the connecting screws between the upper and lower end caps to fix the packer body 6 in the auxiliary device. Then tighten the connecting screws between the upper end cap and the outer cylinder. At this point, the assembly of the packer body 6 to be processed and the auxiliary device is complete.

[0044] Step e: Hoist the assembly of the auxiliary device and the packer body 6 to be processed onto the lathe chuck for clamping. After clamping, use a dial indicator on the eccentric hole to align the position of the auxiliary device and the machine tool. After alignment, the eccentric structure processing can begin.

[0045] Step f: After processing, the auxiliary device and packer body 6 assembly is hoisted off the lathe. At this time, the packer body 6 can be taken out simply by loosening the screws of the upper end cover. Without changing the product, there is no need to disassemble other components. Repeating the above steps can achieve mass production of the product.

[0046] By using the detailed processing methods described above, the advantages of this auxiliary device can be fully utilized to achieve high-precision processing of packers, improve production efficiency and product quality, and reduce production costs.

[0047] The upper and lower end caps of this invention are machined from the same rotating body, making the relative positions of the positioning holes more precise. The caps are simply split in two by wire cutting before machining the threaded holes connecting them. The holes on the upper end cap for screws are all 1mm larger than the actual outer diameter of the screws to prevent the screws from failing to pass through when the workpiece's outer diameter varies within the tolerance range.

[0048] By changing the combination of the upper and lower end caps and the counterweight, the processing of the entire series of products can be realized. The application of this tooling realizes the universality and modularity of tooling.

[0049] The successful application of this auxiliary device has greatly increased the production capacity of horizontal machining centers. The machining efficiency for turning such products is far higher than that of horizontal machining centers, and it also solves the problem of machining parts of eccentric structures that horizontal machining centers cannot process, such as special threads. Furthermore, it eliminates the reliance on lathes with adjustable four-jaw chucks. Before the application of this auxiliary device, the eccentric structures of such products were all machined by horizontal machining centers or large lathes, using outsourcing. Because these products have large outer diameters, the investment in lathes used for machining them was also relatively large. After the successful development of this auxiliary device, ordinary lathes can now be used to machine these products, saving companies a huge amount of investment.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0051] Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. An auxiliary device for processing the eccentric hole structure of a packer body, comprising an outer cylinder (1), wherein the packer body to be processed is placed in the outer cylinder (1), characterized in that: It also includes an end cap assembly and a counterweight (5). The end cap assembly is installed at both ends of the outer cylinder (1). The counterweight (5) is located inside the outer cylinder (1) and is connected to the inner wall of the outer cylinder (1). During operation, the packer body (6) to be processed is placed in the outer cylinder (1). A gap is provided between part of the outer side surface of the packer body (6) to be processed and the counterweight (5). The packer body (6) to be processed is eccentric relative to the outer cylinder (1). The end cap assembly is installed at both ends of the outer cylinder (1) by fasteners to position the workpiece to be processed.

2. The auxiliary device for processing the eccentric hole structure of the packer body as described in claim 1, characterized in that: The eccentric block (5) is an arc-shaped block structure. Both the outer and inner sides of the eccentric block (5) are arc surfaces. The outer side of the eccentric block (5) is in contact with the inner wall surface of the outer cylinder (1). The eccentric block (5) is fixedly installed on the inner wall of the outer cylinder (1) by fasteners.

3. The auxiliary device for processing the eccentric hole structure of the packer body as described in claim 2, characterized in that: The length of the eccentric block (5) is less than the length of the outer cylinder (1).

4. An auxiliary device for processing the eccentric hole structure of a packer body as described in claim 2 or 3, characterized in that: The end cap assembly includes two upper end caps (2) and two lower end caps (3). The outer cylinder (1) has an upper end cap (2) and a lower end cap (3) at each end. The upper end caps (2) and the lower end caps (3) are connected together by fasteners to form an overall end cap structure.

5. The auxiliary device for processing the eccentric hole structure of the packer body as described in claim 4, characterized in that: Both the upper end cover (2) and the lower end cover (3) are provided with arc holes. The diameters of the two arc holes are equal. When the upper end cover (2) and the lower end cover (3) are connected together, the two arc holes form a circular hole (8) opposite to each other.

6. The auxiliary device for processing the eccentric hole structure of the packer body as described in claim 5, characterized in that: The outer diameter of the upper end cover (2) is equal to the outer diameter of the lower end cover (3), and the inner diameter of the upper end cover (2) is equal to the inner diameter of the lower end cover (3). The upper end cover (2) is smaller than a semicircle, and the lower end cover (3) is larger than a semicircle. A baseline (31) is formed by drawing a line through the center line of the outer diameter of the outer cylinder (1) on the lower end cover (3).

7. An auxiliary device for processing the eccentric hole structure of a packer body as described in claim 6, characterized in that: The lower end cap (3) is assembled on the end face of the outer cylinder (1) by a positioning pin (4) and fixed by a set screw. The upper end cap (2) cooperates with the lower end cap (3) and is installed on the end face of the outer cylinder (1) by a set screw.

8. The auxiliary device for processing the eccentric hole structure of the packer body as described in claim 7, characterized in that: The eccentric block (5) is located inside the outer cylinder (1) within the area surrounded by the lower end cover (3).

9. An auxiliary device for processing the eccentric hole structure of a packer body as described in claim 7, characterized in that: The upper end cover (2) and the lower end cover (3) are connected by screws (7). At the contact point between the upper end cover (2) and the lower end cover (3), the lower end cover (3) is provided with a threaded hole and the upper end cover (2) is provided with a through hole. The screw (7) passes through the through hole on the upper end cover (2) and is fastened to the threaded hole on the lower end cover (3). The corresponding position of the through hole on the upper end cover (2) is provided with an L-shaped groove (21). The bottom of the nut of the screw (7) fits against the plane of the L-shaped groove.

Images