Tooling for manufacturing eccentric sleeve assembly and eccentric sleeve assembly manufacturing process

Abstract

This invention discloses a tooling for manufacturing eccentric sleeve assemblies. The eccentric sleeve assembly includes a lower eccentric sleeve, an upper eccentric sleeve, and a connecting cover connecting the lower and upper eccentric sleeves. The tooling is characterized by comprising: a base plate; and an eccentric mandrel fixedly mounted on the base plate. The eccentric mandrel includes a first main body portion fixedly connected to the base plate and a second main body portion disposed above the first main body portion. The outer diameter of the first main body portion is larger than the outer diameter of the second main body portion. This invention provides a tooling for manufacturing eccentric sleeve assemblies, making the installation of the eccentric sleeve assembly more convenient and stable. It also provides drilling and reaming machining for fixing and installing the upper eccentric sleeve, lower eccentric sleeve, and connecting cover with high positioning accuracy.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing technology, specifically relating to a tooling for manufacturing eccentric sleeve components and a manufacturing process for eccentric sleeve components. Background Technology

[0002] The eccentric sleeve assembly consists of three parts: an upper eccentric sleeve, a lower eccentric sleeve, and a connecting cover. It is mainly used to adjust the roll gap of high-speed wire rod mill rolls. Since the position of the roll mandrel is adjusted by a worm gear, thereby adjusting the distance between the rolls, the requirements for the eccentric sleeve assembly are very high. Generally, the eccentric direction, eccentricity, and concentricity of the upper and lower eccentric sleeves must be guaranteed to be within 0.02 mm.

[0003] In the existing manufacturing process of eccentric sleeve assemblies, due to the special structure of the eccentric sleeve assembly, it is difficult to clamp and fix the upper eccentric sleeve, lower eccentric sleeve, and connecting cover. Furthermore, there are errors in correcting and adjusting the eccentric direction and eccentricity. At the same time, the connecting pin holes of the upper and lower eccentric sleeves and the connecting cover are machined separately, which introduces certain errors during assembly. It is difficult to ensure the consistency of the eccentric direction, and the connecting pins are stuck in the connecting pin holes, causing stress on the workpiece and increasing the risk of deformation.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a tooling for manufacturing eccentric sleeve components and a manufacturing process for eccentric sleeve components. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a tooling for manufacturing an eccentric sleeve assembly and a manufacturing process for the eccentric sleeve assembly.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] A tooling for manufacturing an eccentric sleeve assembly, the eccentric sleeve assembly including a lower eccentric sleeve, an upper eccentric sleeve, and a connecting cover connecting the lower eccentric sleeve and the upper eccentric sleeve, the tooling including:

[0008] Base plate;

[0009] An eccentric mandrel is fixedly mounted on the base plate. The eccentric mandrel includes a first main body portion fixedly connected to the base plate and a second main body portion disposed above the first main body portion. The outer diameter of the first main body portion is larger than the outer diameter of the second main body portion.

[0010] In one embodiment, the base plate is provided with a first positioning pin for positioning the lower eccentric sleeve; the upper surface of the first main body is provided with a second positioning pin for positioning the upper eccentric sleeve.

[0011] Another embodiment of the present invention provides the following technical solution:

[0012] A manufacturing process for an eccentric sleeve component, the manufacturing process comprising:

[0013] S1. Roughly machine the outer circle, two end faces, and eccentric hole of the upper and lower eccentric sleeves, rough machine the outer circle, two end faces, and inner hole of the connecting cover body, retain the first single-sided allowance, and drill the first positioning pin hole on the lower surface of the upper eccentric sleeve and the second positioning pin hole on the lower surface of the lower eccentric sleeve.

[0014] S2. Perform heat treatment on the upper eccentric sleeve, the lower eccentric sleeve, and the connecting cover body;

[0015] S3. Fine-machine the outer circle and two end faces of the upper and lower eccentric sleeves, remove the first single-sided allowance, fine-machine the outer circle of the connecting cover, remove the first single-sided allowance, and fine-machine the inner hole and two end faces of the connecting cover body, retaining the second single-sided allowance.

[0016] S4. Precision bore the eccentric hole of the upper eccentric sleeve, remove the first single-sided allowance, precision bore the eccentric hole of the lower eccentric sleeve, and retain the third single-sided allowance.

[0017] S5. Cut the excess part of the lower eccentric sleeve edge with wire to divide the main body of the connecting cover into several connecting covers.

[0018] S6. Precision boring of the eccentric hole of the lower eccentric sleeve, removing the third single-sided allowance, machining the threaded connection hole between the connecting cover and the upper and lower eccentric sleeves, precision machining of the inner hole and two end faces of the connecting cover, removing the second single-sided allowance.

[0019] S7. Using the aforementioned tooling, install the upper eccentric sleeve and the lower eccentric sleeve, and simultaneously fix the connecting cover; using a horizontal machining center, through drilling and reaming, fix the connecting cover onto the upper eccentric sleeve and the lower eccentric sleeve.

[0020] In one embodiment, the first single-sided allowance is 1mm to 3mm, the second single-sided allowance is 0.5mm to 1.5mm, and the third single-sided allowance is 0.25mm to 0.75mm.

[0021] In one embodiment, before step S3, the method further includes: semi-finish machining the outer circle and two end faces of the upper eccentric sleeve, the outer circle and two end faces of the lower eccentric sleeve, and the outer circle of the connecting cover body.

[0022] In one embodiment, the heat treatment temperature range in step S2 is 500℃~520℃.

[0023] In one embodiment, the outer circle of the upper eccentric sleeve is provided with a first keyway, and the outer circle of the lower eccentric sleeve is provided with a second keyway.

[0024] In one embodiment, step S4 further includes processing the first keyway of the upper eccentric sleeve and the second keyway of the lower eccentric sleeve.

[0025] In one embodiment, the central angle of the connecting cover in step S5 is 120°.

[0026] The present invention has the following beneficial effects:

[0027] This invention provides a manufacturing process for an eccentric sleeve assembly, which can effectively avoid product deformation caused by clamping method and process flow, and can well control the eccentric direction and eccentricity of the eccentric sleeve assembly, and control the concentricity of the eccentric holes of the upper and lower eccentric sleeves.

[0028] This invention provides a tooling for manufacturing eccentric sleeve assemblies, which makes the eccentric sleeve assembly easier to install and more stable. It also provides drilling and reaming for fixing and installing the upper eccentric sleeve, lower eccentric sleeve and connecting cover, with high positioning accuracy. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the main structure of the tooling in Embodiment 1 of the present invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the tooling in Embodiment 1 of the present invention;

[0032] Figure 3 This is a cross-sectional view of the eccentric sleeve assembly and tooling in Embodiment 2 of the present invention;

[0033] Figure 4 This is a three-dimensional structural diagram of the eccentric sleeve assembly and tooling in Embodiment 2 of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the products of this application are customarily placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In the description of the embodiments of the present invention, it should also be noted that regarding the use of "first", "second", etc. herein, it does not particularly refer to the order or sequence, nor is it used to limit this case. It is only used to distinguish components or operations described with the same technical terms.

[0040] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0041] The technical solutions in the present invention will be described below with reference to the accompanying drawings.

[0042] Embodiment 1:

[0043] Refer to Figure 1 、 Figure 2As shown in the figure, the tooling for manufacturing an eccentric sleeve assembly in a specific embodiment of the present invention includes a base plate 1; an eccentric mandrel 2, which is fixedly installed on the base plate 1. The eccentric mandrel 2 includes a first main body portion 21 fixedly connected to the base plate 1 and a second main body portion 22 disposed above the first main body portion 21. The outer diameter of the first main body portion 21 is greater than that of the second main body portion 22.

[0044] According to this design, the eccentric sleeve assembly can be fixedly installed through this tooling in this embodiment, making the installation process more convenient. At the same time, through the vertical clamping method, the rigidity of the workpiece is increased, and the installation process is more stable. The assembly and clamping through the eccentric mandrel 2 can simulate the actual use conditions. The eccentric holes of the upper eccentric sleeve 3 and the lower eccentric sleeve 4 are in transitional fit with the outer circle of the eccentric mandrel 2. At the same time, the connecting pin holes between the upper eccentric sleeve 3, the lower eccentric sleeve 4 and the connecting housing 5 are in close fit through pins. Through repeated positioning, the accuracy is improved and the stability is better.

[0045] Preferably, a first positioning pin 11 is provided on the base plate 1 in this embodiment for positioning the lower eccentric sleeve 4; a second positioning pin 211 is provided on the upper surface of the first main body portion 21 for positioning the upper eccentric sleeve 3. According to this design, the positioning pin on the lower surface of the lower eccentric sleeve 4 and the first positioning pin 11 can cooperate with each other to realize the positioning of the lower eccentric sleeve 4 on the eccentric mandrel 2; the positioning pin hole on the lower surface of the upper eccentric sleeve 3 and the second positioning pin 211 can cooperate with each other to realize the positioning of the upper eccentric sleeve 3 on the eccentric mandrel 2.

[0046] Embodiment Two:

[0047] Refer Figure 3 、 Figure 4 The present invention also discloses a manufacturing process for an eccentric sleeve assembly, which is characterized in that the manufacturing process includes:

[0048] S1. Rough turn the outer circles, both end faces, and eccentric holes of the upper eccentric sleeve 3 and the lower eccentric sleeve 4, rough turn the outer circle, both end faces, and inner hole of the connecting housing main body, retain the first single-sided allowance, and drill a first positioning pin hole on the lower surface of the upper eccentric sleeve 3 and a second positioning pin hole on the lower surface of the lower eccentric sleeve 4; <ElementID=

[0049] S2. Perform heat treatment on the upper eccentric sleeve 3, the lower eccentric sleeve 4, and the connecting housing main body;

[0050] S3. Finish turn the outer circles and both end faces of the upper eccentric sleeve 3 and the lower eccentric sleeve 4, remove the first single-sided allowance, finish turn the outer circle of the connecting housing 5, remove the first single-sided allowance, and finish turn the inner hole and both end faces of the connecting housing main body, retain the second single-sided allowance;

[0051] S4. Finish boring the eccentric hole of the upper eccentric sleeve 3, remove the first single-sided allowance, finish boring the eccentric hole of the lower eccentric sleeve 4, and retain the third single-sided allowance;

[0052] S5. Cut the excess part of the edge of the eccentric sleeve 4 with wire cutting to divide the main body of the connecting cover into several connecting covers 5.

[0053] S6. Precision boring of the eccentric hole of the lower eccentric sleeve 4, removing the third single-sided allowance, machining the threaded connection hole 51 between the connecting cover 5 and the upper eccentric sleeve 3 and the lower eccentric sleeve 4, precision machining of the inner hole and both end faces of the connecting cover 5, removing the second single-sided allowance.

[0054] S7. Using the tooling described above, install the upper eccentric sleeve 3 and the lower eccentric sleeve 4, and fix the connecting cover 5 at the same time; using a horizontal machining center, through drilling and reaming, fix the connecting cover 5 onto the upper eccentric sleeve 3 and the lower eccentric sleeve 4.

[0055] Based on this design, this manufacturing process can effectively avoid product deformation caused by clamping method and process flow, and can well control the eccentric direction and eccentricity of the eccentric sleeve assembly, and control the concentricity of the eccentric holes of the upper eccentric sleeve 3 and the lower eccentric sleeve 4.

[0056] In this embodiment, the first single-sided allowance is 1mm~3mm, the second single-sided allowance is 0.5mm~1.5mm, and the third single-sided allowance is 0.25mm~0.75mm. By designing appropriate first, second, and third single-sided allowances, the eccentric direction and eccentricity of the eccentric sleeve assembly can be better controlled.

[0057] Preferably, the outer circle and two end faces of the upper eccentric sleeve 3, the outer circle and two end faces of the lower eccentric sleeve 4, and the outer circle of the connecting cover body are semi-finished. According to this design, the deformation of the upper eccentric sleeve 3, the lower eccentric sleeve 4, and the connecting cover body during the heat treatment process can be adjusted.

[0058] In this embodiment, the heat treatment temperature range in step S2 is 500℃~520℃. Heat treatment eliminates internal stress.

[0059] In addition, in this embodiment, the outer circle of the upper eccentric sleeve 3 is provided with a first keyway 31, and the outer circle of the lower eccentric sleeve 4 is provided with a second keyway 41. Before step S4 in this embodiment, the first keyway 31 of the upper eccentric sleeve 3 and the second keyway 41 of the lower eccentric sleeve 4 are further processed. This design facilitates the processing of the first keyway 31 and the second keyway 41 after the outer circle of the eccentric sleeve is processed, preventing deformation.

[0060] In this embodiment, the central angle of the connecting cover 5 in step S5 is 120°. Based on this design, the connecting cover 5 in this embodiment can fix the upper eccentric sleeve 3 and the lower eccentric sleeve 4.

[0061] The manufacturing process in this embodiment is as follows:

[0062] S1. Roughly turn the outer circle, two end faces, and eccentric hole of the upper eccentric sleeve 3 and the lower eccentric sleeve 4. Roughly turn the outer circle, two end faces, and inner hole of the connecting cover body, retaining a first single-sided allowance of 2mm. Drill the first positioning pin hole on the lower surface of the upper eccentric sleeve 3 and the second positioning pin hole on the lower surface of the lower eccentric sleeve 4. The chip cutting speed is 120m / min, the chip cutting depth is 2mm, and the feed speed is 0.35mm / rev.

[0063] S2. Heat treatment is performed on the upper eccentric sleeve 3, the lower eccentric sleeve 4, and the main body of the connecting cover. The furnace temperature does not exceed the tempering temperature of the raw materials, and the heat treatment temperature is between 500℃ and 520℃.

[0064] S3. Semi-finish turning, finish turning the outer circle and two end faces of the upper eccentric sleeve 3 and the lower eccentric sleeve 4, removing the first single-sided allowance of 2mm, finish turning the outer circle of the connecting cover 5, removing the first single-sided allowance of 2mm, and finish turning the inner hole and two end faces of the connecting cover body, retaining the second single-sided allowance of 1mm. The chip speed is 140m / min, the chip depth is 1mm, and the feed speed is 0.2mm / rev.

[0065] S4. The upper eccentric sleeve 3, lower eccentric sleeve 4, and connecting cover 5 are clamped and corrected using a CNC machining center, and the eccentric direction is adjusted. The first keyway 31 of the upper eccentric sleeve 3 and the second keyway 41 of the lower eccentric sleeve 4 are machined. The eccentric hole of the upper eccentric sleeve 3 is precision bored, and the first single-sided allowance of 2mm is removed. The eccentric hole of the lower eccentric sleeve 4 is precision bored, and the third single-sided allowance of 0.5mm is retained. The chip cutting speed of the precision boring is 200m / min, the chip cutting depth is 0.15mm, and the feed rate is 0.1mm / rev. At the same time, the pre-drilled first and second locating pin holes are enlarged to the required size.

[0066] S5. Cut the excess part of the edge of the eccentric sleeve 4 with wire cutting to divide the main body of the connecting cover into several connecting covers 5.

[0067] S6. Precision boring of the eccentric hole of the lower eccentric sleeve 4, removing the third single-sided allowance of 0.5mm, wherein the cutting speed is 200m / min, the cutting depth is 0.15mm, and the feed rate is 0.1mm / rev; machining the threaded connection hole 51 between the connecting cover 5 and the upper eccentric sleeve 3 and the lower eccentric sleeve 4, and precision machining of the inner hole and both end faces of the connecting cover 5, removing the second single-sided allowance of 1mm;

[0068] S7. Using the tooling described above, install the upper eccentric sleeve 3 and the lower eccentric sleeve 4, and simultaneously fix the connecting cover 5. Using a horizontal machining center, perform drilling and reaming, and use connecting pins 6 to fix the connecting cover 5 onto the upper eccentric sleeve 3 and the lower eccentric sleeve 4. The drill parameters are: chip speed 80m / min, feed rate 0.25mm / rev; the reaming parameters are: chip speed 30m / min, feed rate 0.1mm / rev.

[0069] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0070] This invention provides a manufacturing process for an eccentric sleeve assembly, which can effectively avoid product deformation caused by clamping method and process flow, and can well control the eccentric direction and eccentricity of the eccentric sleeve assembly, and control the concentricity of the eccentric holes of the upper and lower eccentric sleeves.

[0071] This invention provides a tooling for manufacturing eccentric sleeve assemblies, which makes the eccentric sleeve assembly easier to install and more stable. It also provides drilling and reaming for fixing and installing the upper eccentric sleeve, lower eccentric sleeve and connecting cover, with high positioning accuracy.

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An eccentric bush assembly manufacturing process characterised in that, The manufacturing process comprises: S1, rough turning the outer circle, two end faces and eccentric hole of the upper eccentric sleeve and the lower eccentric sleeve, rough turning the outer circle, two end faces and inner hole of the connecting cover shell main body, reserving a first single-sided allowance, drilling a first positioning pin hole on the lower surface of the upper eccentric sleeve, and drilling a second positioning pin hole on the lower surface of the lower eccentric sleeve; S2, heat treating the upper eccentric sleeve, the lower eccentric sleeve and the connecting cover shell main body; S3, fine turning the outer circle and two end faces of the upper eccentric sleeve and the lower eccentric sleeve, removing the first single-sided allowance, fine turning the outer circle of the connecting cover shell, removing the first single-sided allowance, and fine turning the inner hole and two end faces of the connecting cover shell main body, reserving a second single-sided allowance; S4, fine boring the eccentric hole of the upper eccentric sleeve, removing the first single-sided allowance, and fine boring the eccentric hole of the lower eccentric sleeve, reserving a third single-sided allowance; S5, wire cutting the excess part of the edge of the lower eccentric sleeve, and dividing the connecting cover shell main body into a plurality of connecting cover shells, the central angle of the connecting cover shell being 120°; S6, fine boring the eccentric hole of the lower eccentric sleeve, removing the third single-sided allowance, processing the threaded connection hole of the connecting cover shell with the upper eccentric sleeve and the lower eccentric sleeve, and fine processing the inner hole and two end faces of the connecting cover shell, removing the second single-sided allowance; S7, using a tool for manufacturing an eccentric sleeve assembly, the eccentric sleeve assembly comprising a lower eccentric sleeve, an upper eccentric sleeve and a connecting cover shell connecting the lower eccentric sleeve and the upper eccentric sleeve, characterized in that the tool comprises a base plate and an eccentric mandrel, the eccentric mandrel being fixedly installed on the base plate, the eccentric mandrel comprising a first main body part fixedly connected with the base plate and a second main body part arranged above the first main body part, the outer diameter of the first main body part being larger than that of the second main body part; the base plate is provided with a first positioning pin for positioning the lower eccentric sleeve; the upper surface of the first main body part is provided with a second positioning pin for positioning the upper eccentric sleeve; The upper eccentric sleeve and the lower eccentric sleeve are installed, and the connecting cover shell is fixedly installed on the upper eccentric sleeve and the lower eccentric sleeve at the same time.

2. The eccentric bushing assembly manufacturing process of claim 1, wherein, The first single-sided allowance is 1mm-3mm, the second single-sided allowance is 0.5mm-1.5mm, and the third single-sided allowance is 0.25mm-0.75mm.

3. The eccentric bushing assembly manufacturing process of claim 1, wherein, Before the step S3, the outer circle and two end faces of the upper eccentric sleeve, the outer circle and two end faces of the lower eccentric sleeve, and the outer circle of the connecting cover shell main body are also semi-finely turned.

4. The eccentric bushing assembly manufacturing process of claim 1, wherein, The heat treatment temperature in the step S2 ranges from 500℃ to 520℃.

5. The eccentric bushing assembly manufacturing process of claim 1, wherein, The outer circle of the upper eccentric sleeve is provided with a first key groove, and the outer circle of the lower eccentric sleeve is provided with a second key groove.

6. The eccentric bushing assembly manufacturing process of claim 5, wherein, Before the step S4, the first key groove of the upper eccentric sleeve and the second key groove of the lower eccentric sleeve are also processed.

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