Positioning tool and equipment for machining metal casting shell

Abstract

The utility model relates to the technical field of machining and manufacturing of metal shells, in particular to a positioning tool and equipment for machining a metal casting shell, which comprises a pressing mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism. Through the arrangement of the supporting mechanism, the whole positioning tool is supported; through arrangement of the positioning mechanism, accurate positioning of the casting shell to be machined is achieved, and positioning and locking of the casting shell to be machined are achieved in cooperation with the pressing mechanism and the locking mechanism; in actual machining, only the positioned and clamped casting shell to be machined needs to be placed in the horizontal machining center to be machined, adjustment and alignment are not needed, alignment time is saved, alignment errors are avoided, meanwhile, the original machining procedure is combined into one procedure from three procedures, and the machining efficiency is improved by more than 40%. The problem that in the prior art, manual scribing deviation is large, and the requirement of a horizontal machining procedure cannot be met is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing and manufacturing of metal shells, in particular to a positioning tool and equipment used for processing metal mold casting shells. Background Art

[0002] Gas-insulated metal-enclosed switchgear (GIS) is a type of metal-enclosed switchgear and controlgear that uses, at least in part, a gas at a pressure higher than atmospheric pressure as its insulating medium. GIS components include circuit breakers, disconnectors, earthing switches, transformers, lightning arresters, busbars, connectors, and outgoing line terminals. These devices or components are all enclosed in a grounded metal casing filled with a certain pressure of SF6 gas, a highly insulating gas. The metal casing is typically a mold-cast aluminum alloy casing, typically a shell-like casting formed by solidifying liquid aluminum alloy within the mold cavity. The existing machining process for metal mold casting shells includes a marking process, a CNC boring machine, and a horizontal machining center process. The marking process is to mark the position dimension lines between the flanges, the shell center line, and the end face machining allowance line on the shell parts based on the inner cavity of the blank. The CNC boring machine selects one of the appropriate flange surfaces as the processing reference for the subsequent process, mills the flange end face, leaves a machining allowance, and then processes two horizontally symmetrical holes as positioning holes. The horizontal machining center process is to complete the processing of all the machining surfaces of the shell parts. At present, the use of existing processing technology to process such parts has the problem of manual marking and marking deviation, low work efficiency, and there is also an alignment deviation before the CNC boring machine process aligns the marking reference, which easily leads to error accumulation. When any of the marking and CNC boring machine processes are missing, such parts will not be able to be processed in the horizontal machining process, resulting in a production bottleneck. Utility Model Content

[0003] Aiming at the problem in the prior art that manual marking has large deviation and cannot meet the requirements of horizontal processing procedures, the utility model provides a positioning tool and equipment for processing metal mold casting shells.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The utility model provides a positioning tool for processing a metal mold casting shell, comprising a pressing mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism;

[0006] The support mechanism is located on the workbench of the processing process and is used to support the positioning mechanism;

[0007] The positioning mechanism is provided on the supporting mechanism and is used to position the shell of the casting to be processed. It includes a positioning boss provided on the supporting mechanism, and the positioning boss is provided with a positioning curved surface corresponding to the back neck of the flange of the shell of the casting to be processed;

[0008] The pressing mechanism is located above the positioning mechanism and is used to press and fix the shell of the casting to be processed;

[0009] One end of the locking mechanism is connected to the pressing mechanism, and the other end is connected to the positioning mechanism, and is used to assist the pressing mechanism and the positioning mechanism in positioning and pressing the shell of the casting to be processed.

[0010] Furthermore, the clamping mechanism includes a clamping ring arranged above the positioning mechanism, and the bottom surface of the clamping ring is provided with a plurality of bosses along the circumferential direction. During positioning installation, the bottom surface of the bosses acts on the top of the shell of the casting to be processed.

[0011] Furthermore, the boss is a fan-shaped structure, and the middle of the fan-shaped structure is lower than both ends of the fan-shaped structure, so that the boss is in line contact or point contact with the surface of the shell of the casting to be processed.

[0012] Furthermore, the locking mechanism includes a plurality of locking chains, one end of the locking chain is connected to the pressing mechanism, and the other end is connected to the positioning mechanism.

[0013] Furthermore, the locking chain is connected to the pressing mechanism via a connecting screw.

[0014] Furthermore, the positioning boss is provided with a plurality of locking hole channels and a plurality of locking groove structures, the locking groove structures correspond to the locking hole channels one by one, and the corresponding locking groove structures and locking hole channels are communicated with each other.

[0015] Furthermore, the locking chain passes through the locking hole channel to the locking groove structure, and is one-way locked by the locking nut and the positioning boss.

[0016] Furthermore, the support mechanism includes a mounting base plate arranged on the workbench, and the mounting base plate is fixedly connected to the bottom of the positioning boss via a plurality of nuts.

[0017] Furthermore, the bottom of the arc-shaped surface on the positioning boss is concave, so that the positioning boss is in point contact or line contact with the shell of the casting to be processed.

[0018] A device for processing metal mold casting shells includes the above-mentioned positioning tooling.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The utility model provides a positioning tool for processing metal mold casting shells, including a clamping mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism; the setting of the supporting mechanism realizes the support of the entire positioning tool; the setting of the positioning mechanism realizes the positioning of the casting shell to be processed, and the precise positioning of the casting shell flange to be processed is realized by the positioning boss and the positioning curved surface arranged on the positioning boss, and the positioning and locking mechanism are coordinated to realize the positioning and locking of the casting shell to be processed. In actual processing, the geometrical dimensions of the metal mold shell structure are better consistent. The characteristics of the positioning fixture are selected as the grinding-free surface of the outer shape as the positioning reference. It is only necessary to place the positioned and clamped casting shell to be processed on the horizontal machining center for processing. There is no need to adjust the alignment, which saves alignment time and avoids alignment errors. The positioning fixture structure is reasonably designed, and the clamping rigidity and clamping effect are more stable and reliable. By using the fixture to complete the machining of the metal shell parts in the blank state, the original processing steps are merged into one step, and the processing efficiency is increased by more than 40%; it is universal for the existing Mazak horizontal mill, Zhongjie 80C horizontal mill, Mitsubishi horizontal mill and Niigata horizontal mill.

[0021] The clamping mechanism includes a clamping ring arranged above the positioning mechanism. The bottom surface of the clamping ring is provided with a plurality of bosses along the circumferential direction. During positioning installation, the bottom surface of the boss acts on the top of the shell of the casting to be processed. The setting of the clamping ring and the boss cooperates with the positioning mechanism to realize the rapid positioning and locking of the top of the shell of the casting to be processed.

[0022] The boss is a fan-shaped structure, and the middle of the fan-shaped structure is lower than the two ends of the fan-shaped structure, so that the boss is in line contact or point contact with the surface of the shell of the casting to be processed. The clamping does not generate large internal stress. The parts are inspected and qualified after processing. During the processing, rough processing, fine processing, stress release and other measures are taken to ensure the processing accuracy of the parts.

[0023] The locking mechanism includes several locking chains, one end of which is connected to the pressing mechanism, and the other end is connected to the positioning mechanism. This locking method does not interfere with the processing tool. Through modeling and cutting simulation, the support point, clamping chain width and position can be adjusted to avoid interference between the tool, tooling, clamping plate, etc., and the tooling size and tool specifications can be determined.

[0024] The locking chain is connected to the pressing mechanism via a connecting screw, has good connection stability, and is simple in structure.

[0025] The positioning boss is provided with a plurality of locking hole channels and a plurality of locking groove structures, the locking groove structures correspond to the locking hole channels one by one, and the corresponding locking groove structures and locking hole channels are connected to each other, the locking chain passes through the locking hole channels to the locking groove structure, and is one-way locked with the positioning boss through the locking nut, and the locking mechanism has a simple structure and is easy to operate.

[0026] The supporting mechanism comprises a mounting base plate arranged on the workbench. The mounting base plate is fixedly connected to the bottom of the positioning boss via a plurality of nuts, and has a simple structure and good stability.

[0027] The bottom of the arcuate surface on the positioning boss is concave, so that the positioning boss is in point contact or line contact with the shell of the casting to be processed, no large internal stress is generated during clamping, and the qualified rate of parts inspected after processing is high.

[0028] The utility model also provides an apparatus for processing metal mold casting shells, including the aforementioned positioning fixture. The apparatus processes cutting parameters no less than those of the original process, i.e., the processing efficiency is higher than that of the original process. Trial cutting is performed to adjust and optimize the cutting parameters and verify the processing dimensional accuracy. Small-batch processing has proven that the processing dimensional and accuracy are stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The utility model is a schematic diagram of a positioning tool for processing a metal mold casting shell.

[0030] Figure 2 This is a structural diagram of the positioning tool used for metal mold casting shell processing of the utility model, which is used to position and clamp the casting shell to be processed.

[0031] Figure 3 This is a schematic diagram indicating the position of the back neck of the shell flange of the casting to be processed.

[0032] Figure 4 This is a front view of a positioning tool for processing a metal mold casting shell according to the present utility model.

[0033] Figure 5 This is a structural diagram of a clamping ring of a positioning tool used for processing a metal mold casting shell according to the present utility model.

[0034] Among them, 1- clamping ring, 2- boss, 3- locking screw, 4- locking nut, 5- positioning boss, 6- locking groove structure, 7- nut, 8- mounting base, 9- locking hole channel, 10- locking chain, 11- connecting screw, 12- casting shell to be processed, A- connecting surface between arc groove and positioning curved surface, B- top surface of fan-shaped structure on both sides of fan-shaped groove, C- flange back neck. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the present invention is typically placed when in use. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain rather than limit the present invention.

[0042] Example 1

[0043] See also Figures 1 to 4 The utility model discloses a positioning tool for processing a metal mold casting shell, comprising a pressing mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism;

[0044] The support mechanism is located on the workbench of the processing process and is used to support the positioning mechanism;

[0045] The positioning mechanism is provided on the support mechanism and is used to position the casting shell 12 to be processed, including a positioning boss 5 provided on the support mechanism, and the positioning boss 5 is provided with a positioning curved surface corresponding to the back neck C of the flange of the casting shell 12 to be processed;

[0046] The clamping mechanism is located above the positioning mechanism and is used to clamp and fix the casting shell 12 to be processed;

[0047] One end of the locking mechanism is connected to the pressing mechanism, and the other end is connected to the positioning mechanism, so as to assist the pressing mechanism and the positioning mechanism in positioning and pressing the casting shell 12 to be processed.

[0048] The setting of the supporting mechanism realizes the support of the entire positioning tool; the setting of the positioning mechanism realizes the positioning of the casting shell 12 to be processed, and the precise positioning of the flange of the casting shell 12 to be processed is achieved through the positioning boss 5 and the positioning curved surface set on the positioning boss 5. The positioning and locking of the casting shell to be processed are achieved in conjunction with the clamping mechanism and the locking mechanism. In actual processing, the geometrical size consistency of the metal mold shell structure is better, and the surface that does not require polishing is selected as the positioning reference. It is only necessary to place the positioned and clamped casting shell to be processed on the horizontal machining center for processing. There is no need to adjust and align, which saves alignment time and avoids alignment errors. The positioning tool structure is reasonably designed, and the clamping rigidity and clamping effect are more stable and reliable.

[0049] Example 2

[0050] See also Figures 1 to 4 The utility model discloses a positioning tool for processing a metal mold casting shell, comprising a pressing mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism;

[0051] The support mechanism is located on a workbench of the processing technology and is used to support the entire positioning tool, including a mounting base plate 8 arranged on the workbench.

[0052] The positioning mechanism is provided on the support mechanism and is used to position the casting shell 12 to be processed. It includes a positioning boss 5 provided on the support mechanism. The positioning boss 5 is provided with a positioning curved surface corresponding to the back neck of the flange of the casting shell 12 to be processed. The mounting base 8 is fixedly connected to the bottom of the positioning boss 5 by a number of nuts 7. The positioning boss 5 is provided with a number of locking hole channels 9 and a number of locking groove structures 6. The locking groove structures 6 correspond to the locking hole channels 9 one by one, and the corresponding locking groove structures 6 are interconnected with the locking hole channels 9. The bottom of the arcuate surface on the positioning boss 5 is concave, so that the positioning boss 5 and the casting shell 12 to be processed are in point contact or line contact.

[0053] The pressing mechanism is located above the positioning mechanism and is used to press and fix the casting shell 12 to be processed. Figure 5 , including a clamping ring 1 arranged above the positioning mechanism, and a plurality of bosses 2 are arranged on the bottom surface of the clamping ring 1 along the circumferential direction. During positioning installation, the bottom surface of the boss 2 acts on the top of the casting shell 12 to be processed. The boss 2 is a fan-shaped structure, and the middle of the fan-shaped structure is lower than the two ends of the fan-shaped structure, so that the boss 2 is in line contact or point contact with the surface of the casting shell 12 to be processed.

[0054] One end of the locking mechanism is connected to the clamping mechanism through a connecting screw 11, and the other end is connected to the positioning mechanism, which is used to assist the clamping mechanism and the positioning mechanism in positioning and clamping the casting shell 12 to be processed. It includes a number of locking chains 10, one end of the locking chain 10 is connected to the clamping ring 1 through the connecting screw 11, and the connection position corresponds to the position of the boss 2, and the other end passes through the locking hole channel 9 to the locking groove structure 6, and is one-way locked with the positioning boss 5 through the locking nut 4.

[0055] During positioning and clamping, the positioning tool selects the positioning curved surface of the positioning boss 5 as the positioning reference surface. After the flange back neck C of the casting shell 12 to be processed is embedded in the positioning component 5, the boss 2 on the clamping ring 1 and the casting shell 12 to be processed serve as force-bearing surfaces. One end of the locking chain 10 is inserted into the locking hole channel 9 on the positioning boss 5, and is locked in the locking groove structure 6 through the locking nut 4 to complete the positioning and locking of the part.

[0056] Example 3

[0057] See also Figures 1 to 4 Taking the positioning tooling for the to-be-processed casting shell 12 of the four-way as an example, the utility model discloses a positioning tooling for processing the metal mold casting shell, including a clamping mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism;

[0058] The support mechanism is located on a workbench of the processing technology and is used to support the positioning mechanism, including a mounting base plate 8 arranged on the workbench.

[0059] The positioning mechanism is provided on the support mechanism and is used to position the casting shell 12 to be processed. The positioning mechanism includes a positioning boss 5 provided on the support mechanism. The positioning boss 5 is provided with positioning curved surfaces corresponding to the four flange back necks of the casting shell 12 to be processed. The bottom of the positioning curved surface is provided with an arc-shaped groove. The connecting surface A between the arc-shaped groove and the positioning curved surface is provided to fit in correspondence with the flange back neck C of the casting shell 12 to be processed. The mounting base 8 is fixedly connected to the bottom of the positioning boss 5 by a number of nuts 7. The positioning boss 5 is provided with a number of locking hole channels 9 and a number of locking groove structures 6. The locking groove structures 6 correspond to the locking hole channels 9 one by one, and the corresponding locking groove structures 6 are connected to the locking hole channels 9. The bottom of the arc surface on the positioning boss 5 is concave, so that the positioning boss 5 is in point contact or line contact with the casting shell 12 to be processed.

[0060] See also Figure 5 The clamping mechanism is located above the positioning mechanism and is used to clamp and fix the casting shell 12 to be processed. It includes a clamping ring 1 arranged above the positioning mechanism. The bottom surface of the clamping ring 1 is provided with a plurality of bosses 2 along the circumferential direction. During positioning and installation, the bottom surface of the boss 2 acts on the top of the casting shell 12 to be processed. The boss 2 is a fan-shaped structure, and a fan-shaped groove is provided in the middle of the fan-shaped structure. The top surfaces B of the fan-shaped structure on both sides of the fan-shaped groove fit into the corresponding positions of the top of the casting shell 12 to be processed, which is a force-bearing part. It can not only achieve stable positioning and locking, but also effectively reduce internal stress, making the clamping more reliable.

[0061] One end of the locking mechanism is connected to the clamping mechanism via a connecting screw 11, and the other end is connected to the positioning mechanism, and is used to assist the clamping mechanism and the positioning mechanism in positioning and clamping the casting shell 12 to be processed. The locking mechanism includes four locking chains 10, one end of which is connected to the clamping ring 1 via a connecting screw 11, and the connection position corresponds to the position of the boss 2. The other end passes through the locking hole channel 9 to the locking groove structure 6, and is one-way locked with the positioning boss 5 via a locking nut 4. The locking chain 10 is located between adjacent flanges of the casting shell 12 to be processed. Since the casting shell 12 to be processed is a four-way shell with a symmetrical spatial geometric feature, during the design process, three flange neck curved surfaces are selected as the main positioning references, and another floating positioning surface is used to determine the positioning surface. The locking screw 3 is provided at one end of the locking chain 10 corresponding to the three flange neck curved surfaces as the main positioning references and connected to the positioning boss.

[0062] The positioning fixture realizes the positioning, clamping and processing of the shell in a horizontal machining center in one step, without the need for adjustment and alignment, saving alignment time and avoiding alignment errors. It positions the shell in a cross-shaped shape, controls the shell's six degrees of freedom, and meets the positioning design requirements.

[0063] Example 4

[0064] A device for processing metal mold casting shells, characterized by including the positioning tooling described in any one of Examples 1-3. The cutting parameters used in the processing of the device are no less than those used in the original process, i.e., the processing efficiency is higher than that of the original process. Trial cutting is performed to adjust and optimize the cutting parameters and verify the dimensional accuracy of the processing. Small-batch processing has proven that the processing dimensions and accuracy are stable and reliable.

[0065] In summary, the utility model provides a positioning tool and equipment for processing metal mold casting shells. By setting a supporting mechanism, a positioning mechanism and a locking mechanism, the precise positioning and locking of the flange of the casting shell 12 to be processed can be achieved. In actual processing, the metal mold shell structure has a good consistency in geometric dimensions, and the surface of the shape that does not require polishing is selected as the positioning reference. It is only necessary to place the positioned and clamped casting shell to be processed in a horizontal machining center for processing. There is no need to adjust and align, which saves alignment time and avoids alignment errors. The positioning tool structure is reasonably designed, and the clamping rigidity and clamping effect are more stable and reliable, so that the original processing steps are merged from three steps into one step, and the processing efficiency is increased by more than 40%.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A positioning tool for metal mold casting shell processing, characterized in that: It includes a pressing mechanism, a locking mechanism, a positioning mechanism and a supporting mechanism; The support mechanism is located on the workbench of the processing process and is used to support the positioning mechanism; The positioning mechanism is arranged on the support mechanism and is used to position the shell (12) of the casting to be processed, and comprises a positioning boss (5) arranged on the support mechanism, wherein the positioning boss (5) is provided with a positioning curved surface corresponding to the back neck of the flange of the shell (12) to be processed; The pressing mechanism is located above the positioning mechanism and is used to press and fix the casting shell (12) to be processed; One end of the locking mechanism is connected to the pressing mechanism, and the other end is connected to the positioning mechanism, and is used to assist the pressing mechanism and the positioning mechanism in positioning and pressing the casting shell (12) to be processed.

2. The positioning tool for metal mold casting shell processing according to claim 1, characterized in that: The clamping mechanism comprises a clamping ring (1) arranged above the positioning mechanism, wherein the bottom surface of the clamping ring (1) is provided with a plurality of bosses (2) along the circumferential direction. When positioning and installing, the bottom surface of the bosses (2) acts on the top of the casting shell (12) to be processed.

3. The positioning tool for metal mold casting shell processing according to claim 2, characterized in that: The boss (2) is a fan-shaped structure, and the middle of the fan-shaped structure is lower than both ends of the fan-shaped structure, so that the boss (2) is in line contact or point contact with the surface of the casting shell (12) to be processed.

4. The positioning tool for metal mold casting shell processing according to claim 1, characterized in that: The locking mechanism comprises a plurality of locking chains (10), one end of the locking chain (10) being connected to the pressing mechanism and the other end being connected to the positioning mechanism.

5. The positioning tool for metal mold casting shell processing according to claim 4, characterized in that: The locking chain (10) is connected to the pressing mechanism via a connecting screw (11).

6. The positioning tool for metal mold casting shell processing according to claim 4, characterized in that: The positioning boss (5) is provided with a plurality of locking hole channels (9) and a plurality of locking groove structures (6), the locking groove structures (6) correspond to the locking hole channels (9) one by one, and the corresponding locking groove structures (6) and locking hole channels (9) are communicated with each other.

7. The positioning tool for metal mold casting shell processing according to claim 6, characterized in that: The locking chain (10) passes through the locking hole channel (9) to the locking groove structure (6), and is one-way locked by the locking nut (4) and the positioning boss (5).

8. The positioning tool for metal mold casting shell processing according to claim 1, characterized in that: The support mechanism comprises a mounting base plate (8) arranged on a workbench, and the mounting base plate (8) is fixedly connected to the bottom of the positioning boss (5) via a plurality of nuts (7).

9. The positioning tool for metal mold casting shell processing according to claim 1, characterized in that: The bottom of the arc-shaped surface on the positioning boss (5) is recessed, so that the positioning boss (5) is in point contact or line contact with the shell (12) of the casting to be processed.

10. A device for processing metal mold casting shells, characterized in that, The invention comprises the positioning tool described in any one of claims 1 to 9.

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