Machine tool special for combined machining of large valve body

Abstract

The utility model relates to the field of valve manufacturing, in particular to a machine tool special for combined machining of a large valve body. The device comprises a lathe bed, a spindle system, a spindle box, a cross-shaped sliding table, a displacement module, a clamp and an automatic tool changing module. The lathe bed comprises a base and a stand column. The projection of the base on the ground is T-shaped, and the base has the characteristics of a wide part and a narrow part; the whole stand column is of a gantry structure and is fixedly installed on the narrow portion of the base. Supporting columns on the two sides of the stand column are of bamboo-joint-like hollow structures, lightening holes are distributed in the surface of the inward side of each supporting column, and a bamboo-joint-like face is arranged in the stand column. The cross-shaped sliding table is fixedly mounted on the wide part of the base; the main shaft system comprises a vertical sliding table, a main shaft motor, a cutter clamping seat, a gear box, a guide rod and a guide rod supporting seat. The structural strength, the stability, the lightweight performance and the space utilization rate are better than those of a general machine tool, part transposition and cutter replacement can be automatically completed, and the production efficiency of large valves is improved.

Description

Technical Field

[0001] The utility model relates to the field of valve manufacturing, in particular to a special machine tool for combined processing of large valve bodies. Background Art

[0002] The gate valve is a commonly used pipeline valve. It is widely used in the fields of chemical industry, petroleum, natural gas, electricity, pharmaceuticals, food processing, etc. due to its simple structure, good sealing performance and low flow resistance. The working principle of the gate valve is to control the flow of the medium by lifting the gate plate; when the gate valve is fully opened, the valve plate of the gate valve is completely separated from the fluid, and when the fluid passes through the gate valve, the pressure will basically not drop; when the gate valve is closed, the gate plate is completely lowered to the valve seat, the sealing channel is closed, and the flow of the fluid is blocked. The valve body is the main body of the gate valve. It is an important part for installing the valve cover, placing the valve seat, and connecting the pipeline. It is also a pressure-bearing part that is directly connected to the pipeline or equipment to form a medium flow channel. The gate valve body is mostly a three-way tubular hollow shell part, with circular flanges at the ends of the two channels, and evenly distributed bolt holes on the flange to connect with the flange on the pipeline. There is also a middle flange on the upper end of the valve body to connect the valve cover. Since the valve body has to accommodate the lifting and lowering movement of the gate plate, the inner cavity height and outer profile dimensions of the gate valve body are often much larger than those of other types of valve bodies. For the valve bodies of large gate valves, stop valves and check valves, casting or cast welding processes are usually used to make the gate valve body blanks. However, due to the large machining allowance of the casting blanks, the mechanical processing of the valve body blanks requires a lot of manufacturing time and labor costs.

[0003] The machining of gate valve bodies is divided into two stages: rough machining and fine machining. In the rough machining stage, three flange surfaces and flange holes are first machined, and then the sealing surface inside the valve body is fine-machined based on the flange surface. The above-mentioned staged manufacturing method involves multiple stations, multiple processes, and multiple processing machines, and the valve body needs to be loaded and unloaded multiple times, and the overall production efficiency and machining accuracy are not high. Therefore, it is urgent to design a special machine tool for combined processing of large valve bodies.

[0004] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present invention concept, and therefore, it may contain information that does not constitute the prior art. Utility Model Content

[0005] The existing technology involves multiple stations, multiple processes and multiple processing machines in the process of machining large valve body blanks. The valve body needs to be loaded and unloaded multiple times, so the overall production efficiency and quality are not ideal. In view of the above problems, the utility model proposes a special machine tool for combined processing of large valve bodies. The machine tool has a displacement module that can process the three-dimensional hole, surface and thread features of the valve body in sequence to simplify the processing process and reduce the equipment. At the same time, lightweight design is adopted in many places to reduce the equipment footprint and cost.

[0006] The specific solution of the device of the utility model is as follows:

[0007] It includes a bed body, a spindle system, a spindle box, a cross slide, a positioning module, a fixture and an automatic tool changer module;

[0008] The bed body includes a base and a column; the projection of the base on the ground is T-shaped, which has the characteristics of a wide part and a narrow part; the base is integrally a hollow box structure; the column is integrally a gantry structure and is fixedly installed on the narrow part of the base; the support columns on both sides of the column are hollow structures similar to bamboo joints, and the inner side surface of the support columns is distributed with weight-reducing holes; a surface similar to a bamboo joint is arranged inside the column to enhance the structural strength; shock-absorbing holes are distributed near the center position on the bamboo joint surface of the column to absorb vibration. The diameters of the weight-reducing holes and the shock-absorbing holes both decrease sequentially from bottom to top. Reinforcing ribs are arranged on the outer side surface of the support column, on the one hand, to improve the lateral strength of the column, and on the other hand, to increase the bottom area of the support column. The spindle system includes a vertical slide, a spindle motor, a tool holder, a gear box, a guide rod and a guide rod support seat; the vertical slide is fixedly installed on the side surface of the column. On the outer surface of the slide plate of the vertical slide facing outwards, a spindle motor and a tool holder are fixedly installed; on the inner surface of the slide plate of the vertical slide facing inwards, a motor, a gear box and a guide rod support seat are fixedly installed; the guide rod is vertically installed on the bed body base and passes through the guide rod support seat. The guide rod support seat can slide up and down on the guide rod. During the vertical movement of the vertical slide plate, the combination of the guide rod and the guide rod support seat plays a role in improving the movement stability. The spindle motor is located between the support columns on both sides of the column, the output shaft of the spindle motor is fixedly connected to the input shaft of the spindle box, and the output shaft of the spindle box is fixedly connected to the tool holder.

[0009] The cross slide is fixedly installed on the wide part of the base; the cross slide is a double-layer structure, the lower layer is a left-right direction slide rail, and the upper layer is a front-back direction slide rail. The front-back direction slide rail is fixedly installed on the slide plate of the left-right direction slide rail; the travel of both the left-right direction slide rail and the front-back direction slide rail is 700 mm. Circular weight-reducing holes and square weight-reducing grooves are distributed on the side wall of the front-back direction slide rail.

[0010] The positioning module is fixedly installed on the slide plate of the front-back direction slide rail and has a 360° rotation function.

[0011] The fixture is fixedly installed on the positioning module.

[0012] The automatic tool changer module is fixedly installed at the upper left of the bed body; the tool change process includes the following steps:

[0013] Step 1: Translate and retract to grasp the preselected tool in the tool magazine;

[0014] Step 2: Draw the tool out and extend to pull out the tool in the tool sleeve;

[0015] Step 3: Translate and extend, leaving the tool grasping position on the tool magazine side;

[0016] Step 4: Retract the tool extraction, and retract the manipulator;

[0017] Step 5: Extend the swing arm, and turn the swing arm towards the spindle side;

[0018] Step 6: Translate and extend, grasping the spindle tool;

[0019] Step 7: Extend the tool extraction, extracting the tool from the spindle;

[0020] Step 8: Rotate the tool changer clockwise or counterclockwise for tool exchange;

[0021] Step 9: Retract the tool extraction, inserting the preselected tool into the spindle;

[0022] Step 10: Translate and retract, and the manipulator leaves the spindle;

[0023] Step 11: Retract the swing arm, and turn the swing arm towards the tool magazine side;

[0024] Step 12: Extend the tool extraction, preparing to send the spindle tool back to the tool magazine;

[0025] Step 13: Translate and retract, and the manipulator moves towards the tool magazine;

[0026] Step 14: Retract the tool extraction, inserting the spindle tool into the tool magazine;

[0027] Step 15: Translate and extend, leaving the tool grasping position on the tool magazine side.

[0028] The utility model has remarkable advantages and beneficial effects compared with the prior art, which are specifically embodied in the following aspects:

[0029] 1) Specifically designed for the machining of large valve bodies, the structural strength, stability, lightweight performance and space utilization rate of the machine tool are better than those of general machine tools;

[0030] 2) One device can complete multiple processes, reducing the number of loading and unloading of the valve body blank, reducing the repeated positioning error of parts, and effectively improving the machining accuracy of workpieces.

[0031] 3) The part transposition and tool change of the tool changer can be automatically completed.

[0032] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the utility model. Description of the Drawings

[0033] The accompanying drawings of the specification, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the attached

[0034] In the figures:

[0035] Figure 1 is a schematic diagram of the overall structure of the device of the present utility model;

[0036] Figure 2 is a schematic cross-sectional view of the device of the present utility model;

[0037] Figure 3 is a schematic rear view of the device of the present utility model;

[0038] Figure 4 is a schematic diagram of the processed valve body structure of the device of the present utility model.

[0039] In the figures: 1. Valve body; 2. Flange hole; 3. Right flange; 4. Left flange; 5. Upper flange; 6. Surfacing layer; 7. Upper center hole; 8. Right center hole; 10. Column; 11. Base; 12. Support column; 13. Weight reduction hole; 131. Shock absorption hole; 14. Reinforcing rib; 15. Gear box; 16. Guide rod; 17. Guide rod support seat; 20. Cross slide; 21. Circular weight reduction hole; 22. Square weight reduction groove; 25. Positioning module; 26. Tool holder. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so as to describe the embodiments of the present utility model here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, the structure of the device of the utility model includes a bed, a spindle system, a spindle box, a cross slide, a displacement module, a fixture and an automatic tool changing module.

[0044] The bed includes a base 11 and a column 10 , and the column 10 is fixedly mounted on the base 11 .

[0045] Preferably, the base 11 as a whole adopts a hollow box-shaped structure, and its projection on the ground is T-shaped, with a wide part and a narrow part.

[0046] Preferably, the column 10 is a gantry structure as a whole, and the crossbeam of the column 10 is supported by support columns 12 on both sides thereof; the column is fixedly mounted on the narrow part of the base.

[0047] Preferably, the support columns 12 are all hollow structures similar to bamboo joints, and bamboo joint-like surfaces are provided inside the support columns 12 to enhance the structural strength.

[0048] Preferably, the support column 12 has weight-reducing holes 13 distributed on the inner side surface; the outer side surface of the support column 12 is provided with reinforcing ribs 14; the reinforcing ribs 14 improve the lateral strength of the column on the one hand, and increase the bottom area of ​​the support column on the other hand.

[0049] Preferably, shock-absorbing holes 131 are distributed near the center of the bamboo-like surface of the support column 12 to absorb vibrations.

[0050] Preferably, the diameters of the weight-reducing holes 13 and the shock-absorbing holes 131 decrease successively from bottom to top.

[0051] The spindle system includes a vertical slide, a spindle motor, a tool holder 26, a gear box 15, a guide rod 16 and a guide rod support seat 17;

[0052] The vertical slide is fixedly mounted on the side of the column 10. On the surface of the slide plate of the vertical slide facing outward, a spindle motor and a tool holder 26 are fixedly mounted; on the surface of the slide plate of the vertical slide facing inward, a motor, a gear box 15 and a guide rod support seat 17 are fixedly mounted;

[0053] The guide rod 16 is vertically installed on the bed base 11 and passes through the guide rod support seat 17. The guide rod support seat 17 can slide up and down on the guide rod 16. During the vertical movement of the vertical slide table, the combination of the guide rod 16 and the guide rod support seat 17 plays a role in improving the movement stability. The spindle motor is located between the support columns 12 on both sides of the column 10. The output shaft of the spindle motor is fixedly connected to the input shaft of the gearbox 15. The output shaft of the gearbox 15 is mechanically connected to the power input end of the tool holder 26.

[0054] Preferably, the diameter of the guide rod 16 is 60 mm, the contact length between the guide rod support seat 17 and the guide rod is 250 mm, and the material of the guide rod 16 is steel with a chrome-plated surface. These features can ensure sufficient contact between the guide rod support seat 17 and the guide rod 16 and are not easily worn.

[0055] Preferably, the surface of the guide rod 16 is provided with spiral oil distribution grooves, the depth of the oil distribution grooves is 1 mm, and the width is 2 mm.

[0056] Preferably, the output shaft of the gearbox 15 is connected to the power input end of the tool holder 26 through a belt drive.

[0057] The cross slide 20 is fixedly installed on the wide part of the base 11; the cross slide 20 is a double-layer structure, the lower layer is a left-right direction slide rail, the upper layer is a front-back direction slide rail, and the front-back direction slide rail is fixedly installed on the slide plate of the left-right direction slide rail; the stroke of the left-right direction slide rail and the front-back direction slide rail is 500 - 700 mm. Circular weight reduction holes 21 and square weight reduction grooves 22 are distributed on the side walls of the front-back direction slide rail.

[0058] Compared with a general cross slide, the slide rail stroke of the double-layer structure cross slide 20 is shorter, making the overall structure of the machine tool more compact; at the same time, setting the left-right direction X slide rail below the front-back direction slide rail Y also makes the movement accuracy of the cross slide 20 in the front-back direction, that is, the Y direction, higher. The front-back direction is the feed direction of the machine tool, so the above setting is beneficial to improving the overall machining accuracy of the machine tool.

[0059] The indexing module 25 is fixedly installed on the slide plate of the front-back direction slide rail and has a 360° rotation function.

[0060] The fixture is fixedly installed on the indexing module 25;

[0061] The automatic tool change module is fixedly installed in the upper left of the bed; the tool change process includes the steps:

[0062] S1: Translate and retract the preselected tool in the tool magazine;

[0063] S2: Draw out the tool in the tool sleeve;

[0064] S3: Translate and extend to leave the tool grasping position on the tool magazine side;

[0065] S4: The tool is withdrawn and retracted, and the manipulator is retracted;

[0066] S5: The swing arm extends and turns towards the spindle side;

[0067] S6: The translation extends and grasps the spindle tool;

[0068] S7: The tool is withdrawn and extended to withdraw the tool in the spindle;

[0069] S8: The tool changer rotates forward or backward to exchange the tool;

[0070] S9: The tool is withdrawn and retracted, and the preselected tool is inserted into the spindle;

[0071] S10: The translation retracts and the manipulator leaves the spindle;

[0072] S11: The swing arm retracts and turns towards the tool magazine side;

[0073] S12: The tool is withdrawn and extended to prepare to send the spindle tool back to the tool magazine;

[0074] S13: The translation retracts and the manipulator moves towards the tool magazine;

[0075] S14: The tool is withdrawn and retracted, and the spindle tool is inserted into the tool magazine;

[0076] S15: The translation extends and leaves the tool grasping position on the tool magazine side.

[0077] The device of the present utility model is used for machining the Figure 3 shown valve body 1, and the specific machining process is as follows:

[0078] S1: The indexing module 25 rotates to the first position, and the tool holder 26 replaces the boring tool;

[0079] S2: Bore and mill the end face of the left flange 4;

[0080] S3: The tool holder 26 replaces the rough milling cutter;

[0081] S4: Rough mill the left center hole;

[0082] S5: The tool holder 26 replaces the fine boring tool;

[0083] S6: Fine bore the left center hole;

[0084] S7: The tool holder 26 replaces the drilling tool;

[0085] S8: Drill the end face flange holes of the left flange;

[0086] The indexing rotary table rotates to the second position, and the above steps are repeated to machine the end face of the upper flange 5, the upper central hole 7, and the end face flange holes of the upper flange 5. The indexing rotary table rotates to the third position, and the above steps are repeated to machine the end face of the right flange 3, the right central hole 8, and the end face flange holes of the right flange 3.

[0087] This embodiment provides a special machine tool for combined machining of large valve bodies. The machine tool has an indexing module that can successively machine the three-hole, face, and thread features of the valve body as shown in Figure 4 order to simplify the machining process and reduce the equipment. At the same time, lightweight design is adopted in many places to reduce the floor area and cost of the equipment.

[0088] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0089] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0090] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0091] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A special machine tool for combined processing of large valve bodies, characterized in that: Including bed, spindle system, spindle box, cross slide, position change module, fixture and automatic tool change module; The bed comprises a base (11) and a column (10), wherein the column (10) is fixedly mounted on the base (11); The base (11) is a hollow box-shaped structure, and its projection on the ground is T-shaped; the column (10) is a gantry structure, and the crossbeam of the column (10) is supported by support columns (12) on both sides thereof; the column (10) is fixedly mounted on the narrow portion of the base (11); the support column (12) is a hollow structure similar to a bamboo joint, and a bamboo joint surface is provided inside the support column (12); shock-absorbing holes (131) are distributed on the bamboo joint surface; The support column (12) has weight-reducing holes (13) distributed on the inner side surface; and the outer side surface of the support column (12) is provided with reinforcing ribs (14); The spindle system comprises a vertical slide, a spindle motor, a tool holder (26), a gear box (15), a guide rod (16) and a guide rod support seat (17); The vertical slide is fixedly mounted on the side of the column (10); a spindle motor and a tool holder (26) are fixedly mounted on the outer side of the slide of the vertical slide; a motor, a gear box (15) and a guide rod support seat (17) are fixedly mounted on the inner side of the slide of the vertical slide; The guide rod (16) is vertically mounted on the bed base (11) and passes through the guide rod support seat (17); The spindle motor is located between the support columns (12) on both sides of the column (10), the output shaft of the spindle motor is fixedly connected to the input shaft of the gear box (15), and the output shaft of the gear box (15) is connected to the power input end of the tool holder (26) through mechanical transmission; The cross slide (20) is fixedly mounted on the wide portion of the base (11); the cross slide (20) is a double-layer structure, the lower layer is a left-right direction slide rail, and the upper layer is a front-back direction slide rail; the front-back direction slide rail is fixedly mounted on the slide plate of the left-right direction slide rail; the stroke of the left-right direction slide rail and the front-back direction slide rail is 500-700 mm; the side walls of the front-back direction slide rail are distributed with circular weight-reducing holes (21) and square weight-reducing grooves (22).

2. A special machine tool for combined processing of large valve bodies according to claim 1, characterized in that: The diameters of the weight-reducing holes (13) and the shock-absorbing holes (131) decrease sequentially from bottom to top.

3. The special machine tool for combined processing of large valve bodies according to claim 1, characterized in that: The guide rod (16) is made of steel and has a chrome-plated surface. A spiral oil distribution groove is provided on the surface of the guide rod (16), and the depth of the oil distribution groove is 1 mm and the width is 2 mm.

4. The special machine tool for combined processing of large valve bodies according to claim 1, characterized in that: The output shaft of the gear box (15) is connected to the power input end of the tool holder (26) through a belt drive; The displacement module (25) is fixedly mounted on a slide plate of the slide rail in the front and rear directions; The automatic tool changing module is fixedly installed on the upper left side of the bed.

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