Machining method of runner type part

Abstract

The machining method comprises the following steps that a wire penetrating hole is drilled in a forge piece part so that an electrode wire of a linear cutting machine tool can penetrate through the wire penetrating hole; the runner allowance on the forge piece part is removed through linear cutting, so that a prototype runner is obtained; and the prototype runner is subjected to electric spark forming machining, so that a formed runner is obtained. According to the method, in the forging process of the forge piece part, under the hammering or pressure effect of forging and pressing machinery, the grain structure in the forge piece blank can change, so that the metal density and the mechanical property of the forge piece blank can be improved, and then the mechanical property of the machined runner part can be improved; besides, the surface subjected to electric spark forming machining is composed of countless small pits and hard convex edges, the hardness of the surface is higher than that of a machined surface, lubricating oil can be protected easily, and the surface lubricity and abrasion resistance of the surface are better than those of a cast surface under the same surface roughness.

Description

Technical Field

[0001] The invention belongs to the technical field of flow channel component processing, and in particular relates to a flow channel component processing method. Background Art

[0002] At present, flow channel parts for underground detection are often made by precision casting. However, precision casting is a processing method that melts metal into liquid, then pours it into a casting cavity that adapts to the shape of the parts, waits for it to cool, solidify and be cleaned to obtain the parts. The internal grain structure is relatively coarse and uneven, and the mechanical properties are usually low, making it difficult to adapt to the complex working environment underground. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides a method for processing flow channel parts, which can improve the mechanical properties of the flow channel parts.

[0004] The object of the present invention is achieved through the following technical solutions: A method for processing flow channel parts, comprising the following steps: Drilling holes on forging parts to allow the electrode wire of the wire cutting machine to pass through; Wire cutting removes the runner excess on the forging parts to obtain the prototype runner; The prototype runner is subjected to electric spark forming processing to obtain a formed runner.

[0005] The beneficial effects of adopting the above technical scheme are as follows: during the forging process of forging parts, the internal grain structure of the forging rough material will change under the hammering or pressure of the forging machine, thereby improving the metal density and mechanical properties of the forging rough material, and then improving the mechanical properties of the processed flow channel parts; in addition, the surface processed by electrospark forming is composed of countless small pits and hard convex edges, and its hardness is higher than that of the machined surface, and it is beneficial to protect the lubricating oil, and its surface lubricity and wear resistance are better than those of the casting surface at the same surface roughness; at the same time, the processing method of flow channel parts does not require the use of a casting mold, and a wide variety of flow channels of parts can be processed, which improves the flexible production capacity and reduces the production cost, and avoids the manufacturer to customize castings abroad, shortening the turnaround time.

[0006] In one embodiment, before drilling the thread hole on the forged component, the processing method of the runner component further includes the following steps: The forging rough material is turned to obtain the forging parts with reference end face and outer cylindrical surface.

[0007] In one embodiment, drilling a thread hole in a forged component comprises the following steps: The threading hole is drilled from the reference end face.

[0008] In one embodiment, after the thread hole is drilled on the forged component, the processing method of the runner component further includes the following steps: Drill two holes from the reference end face; Use a stylus to align the two holes to determine the angular direction of the forging component.

[0009] In one embodiment, after the thread hole is drilled on the forged component, the processing method of the runner component further includes the following steps: Correct the reference end face and outer cylindrical surface of the forging parts, and then fix the forging parts on the online cutting machine.

[0010] In one embodiment, after the thread hole is drilled on the forged component, the processing method of the runner component further includes the following steps: Use a wire straightener to correct the verticality of the electrode wire.

[0011] In one embodiment, the electrospark forming process of the prototype flow channel comprises the following steps: Processing tool electrodes that match the features of the prototype flow channel; The tool electrode is used to electrospark shape the characteristic parts of the prototype flow channel to obtain the formed flow channel.

[0012] In one embodiment, the electrospark forming process of the prototype flow channel further comprises the following steps: During the tool electrode processing, a three-coordinate measuring machine is used to inspect the dimensions of the tool electrode.

[0013] In one embodiment, the electrospark forming process of the prototype flow channel comprises the following steps: The sharp edge of the prototype flow channel is electrospark formed into a curved edge.

[0014] In one embodiment, the electrospark forming process of the prototype flow channel comprises the following steps: The interface between the prototype flow channel and the inner hole of the forging component is processed by electrospark forming.

[0015] The beneficial effects of the present invention are: During the forging process of forging parts, the internal grain structure of the forging raw material will change under the hammering or pressure of the forging machine, which can improve the metal density and mechanical properties of the forging raw material, and then improve the mechanical properties of the processed flow channel parts; in addition, the surface processed by electrospark forming is composed of countless small pits and hard convex edges, and its hardness is higher than that of the machined surface, and it is conducive to protecting lubricating oil, and its surface lubricity and wear resistance are better than those of the casting surface at the same surface roughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein: Figure 1 The schematic diagram of the structure after the wire hole is drilled in the present invention is shown; Figure 2 The schematic diagram of the structure after wire cutting of the present invention is shown; Figure 3 Shows Figure 2 axonometric drawing; Figure 4 The schematic diagram of the structure after the arc edge is processed in the present invention is shown; Figure 5 A schematic diagram showing the installation of the first tool electrode in the present invention is shown; Figure 6 shows a schematic structural diagram of a first tool electrode in the present invention; Figure 7 A schematic diagram showing the installation of the second tool electrode in the present invention is shown; Figure 8 shows a schematic structural diagram of the second tool electrode in the present invention; In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0017] Reference numerals: 1-forging component, 101-reference end face, 102-inner hole, 103-outer cylindrical surface, 2-threading hole, 3-hole body, 4-prototype flow channel, 5-joining surface, 6-lower end face sharp edge, 7-side sharp edge, 8-lower end face arcuate edge, 9-side arcuate edge, 10-first tool electrode, 11-second tool electrode. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] At present, flow channel parts for underground detection are often made by precision casting. However, precision casting is a processing method that melts metal into liquid, then pours it into a casting cavity that adapts to the shape of the parts, waits for it to cool, solidify and be cleaned to obtain the parts. The internal grain structure is relatively coarse and uneven, and the mechanical properties are usually low, making it difficult to adapt to the complex working environment underground.

[0020] The present invention provides a method for processing flow channel parts, such as Figure 1-8 As shown, it includes the following steps: Turning the forging rough material to obtain a forging component 1 having a reference end surface 101 and an outer cylindrical surface 103; A wire hole 2 is drilled on the forging component 1 to pass the electrode wire of the wire cutting machine, and the electrode wire can be a molybdenum wire; Wire cutting removes the runner surplus on the forged component 1 to obtain a prototype runner 4; The prototype flow channel 4 is subjected to electric spark forming processing to obtain a formed flow channel.

[0021] It is understandable that during the forging process of the forging component 1, the internal grain structure of the forging raw material will change under the hammering or pressure of the forging machine, thereby improving the metal density and mechanical properties of the forging raw material, and further improving the mechanical properties of the processed flow channel components.

[0022] It should be noted that the forging raw material used in the processing method of the flow channel parts is a forging made of the same material as the casting.

[0023] In addition, the cost of precision casting is high, and there are quantity requirements for customized castings. They cannot be customized according to demand, and a certain quantity is required to ensure the cost recovery of the mold. The inventory cost of the customizer is increased and other risks are generated. For example, the inventory castings cannot be used if the design is revised. However, the processing method of this runner-type parts does not require the use of molds, and a wide variety of runners for parts can be processed, which improves flexible production capabilities and reduces production costs. It also avoids manufacturers customizing castings abroad and shortens turnaround time.

[0024] At the same time, the filling capacity of liquid metal is insufficient or the filling conditions are poor, and the molten metal stops flowing before the cavity is filled, which causes insufficient casting or cold shut defects in the casting; the gas does not escape in time before the molten metal forms a crust, which causes pores to form in the casting; and the processing method of this runner component is processed on solid materials, which can avoid defects caused by casting, and the surface processed by electrospark forming is composed of countless small pits and hard convex edges, and its hardness is higher than that of the machined surface, and it is beneficial to protect the lubricating oil, and its surface lubricity and wear resistance are better than the casting surface under the same surface roughness.

[0025] Due to the complex manufacturing process of castings, it is difficult to ensure the accuracy of castings. Castings are prone to problems such as size and shape deviations, especially for large and complex-shaped castings, it is even more difficult to ensure accuracy. The current casting accuracy is between ±0.5~2mm; and the runner accuracy of runner parts processed by the processing method of runner parts is guaranteed by the equipment, taper cutting program and tool electrode accuracy. Compared with casting, it requires fewer factors to be controlled, and the current wire cutting processing accuracy can reach ±2.5um, the roughness can reach 0.15~0.2uRa, and the electrospark forming processing can reach ±0.05mm~±0.004mm, and the roughness can reach 0.29uRa.

[0026] The inspection of castings is relatively complicated, which mainly includes dimensional inspection, visual inspection of appearance and surface, chemical composition analysis and mechanical property testing. In addition, for castings with relatively important requirements or castings that are prone to problems in the casting process, non-destructive testing is also required. However, after the processing method of this runner component is completed, only conventional size, shape, position and smoothness inspections are required.

[0027] In one embodiment, Figure 1 and Figure 2 As shown, drilling a thread hole 2 on a forged component 1 includes the following steps: A threading hole 2 is drilled from the reference end face 101; Two holes 3 are drilled from the reference end face 101; Determine the angular direction of the forged component 1 by correcting the two holes 3 using a marking needle; Correcting the reference end face 101 and the outer cylindrical surface 103 of the forged component 1, and then fixing the forged component 1 on the online cutting machine; Use a wire straightener to correct the verticality of the electrode wire.

[0028] In one embodiment, wire cutting to remove the runner excess on the forged component 1 includes the following steps: According to the processing model, a taper cutting program is compiled to remove the flow channel excess of the forging component 1 by wire cutting.

[0029] In one embodiment, Figure 3-8 As shown, the electrospark forming process of the prototype flow channel 4 includes the following steps: Processing the first tool electrode 10 that matches the sharp edge of the prototype flow channel 4, and during the processing of the first tool electrode 10, using a three-coordinate measuring machine to inspect the size of the first tool electrode 10 until the size inspection of the first tool electrode 10 is qualified; The sharp edge of the prototype flow channel 4 is processed by electrospark forming into a curved edge; Processing a second tool electrode 11 that matches the characteristic portion of the connecting surface 5, and during the processing of the second tool electrode 11, using a three-dimensional coordinate measuring machine to inspect the size of the second tool electrode 11 until the size inspection of the second tool electrode 11 is qualified; wherein the connecting surface 5 is located between the prototype flow channel 4 and the inner hole 102 of the forged component 1; The connecting surface 5 between the prototype flow channel 4 and the inner hole 102 of the forged component 1 is subjected to electric spark forming processing to obtain a formed flow channel.

[0030] It should be noted that the sharp edges of the prototype flow channel 4 may refer to the sharp edge 6 of the lower end face and the sharp edge 7 of the side face, that is, the arc-shaped edge 8 of the lower end face and the arc-shaped edge 9 of the side face are generated after the electrospark forming process; in addition, the first tool electrode 10 and the second tool electrode 11 may be processed by a precision engraving machine, so as to improve the accuracy of the first tool electrode 10 and the second tool electrode 11, thereby helping to improve the accuracy of the formed flow channel.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A method for processing flow channel parts, characterized in that: The following steps are involved: Drilling a wire hole (2) on a forged component (1) to allow an electrode wire of a wire cutting machine to pass through; Wire cutting removes the runner excess on the forged component (1) to obtain a prototype runner (4); The prototype flow channel (4) is subjected to electric spark forming processing to obtain a formed flow channel.

2. A method for processing flow channel parts according to claim 1, characterized in that: Before drilling the thread hole (2) on the forged component (1), the following steps are also included: The forging rough material is turned to obtain a forging component (1) having a reference end surface (101) and an outer cylindrical surface (103).

3. A method for processing flow channel parts according to claim 2, characterized in that: The method of drilling a thread hole (2) on a forged component (1) comprises the following steps: A threading hole (2) is drilled from the reference end surface (101).

4. A method for processing flow channel parts according to claim 3, characterized in that: After the thread hole (2) is drilled on the forged component (1), the following steps are also included: Two holes (3) are drilled from the reference end surface (101); The angular orientation of the forged component (1) is determined by aligning the two holes (3) using a marking needle.

5. A method for processing flow channel parts according to claim 4, characterized in that: After the thread hole (2) is drilled on the forged component (1), the following steps are also included: The reference end face (101) and the outer cylindrical surface (103) of the forged component (1) are calibrated, and then the forged component (1) is fixed on the online cutting machine.

6. A method for processing flow channel parts according to claim 5, characterized in that: After the thread hole (2) is drilled on the forged component (1), the following steps are also included: Use a wire straightener to correct the verticality of the electrode wire.

7. A method for processing flow channel parts according to claim 1, characterized in that: The electrospark forming process of the prototype flow channel (4) comprises the following steps: Processing a tool electrode that matches a characteristic portion of the prototype flow channel (4); The characteristic part of the prototype flow channel (4) is processed by tool electrode electrospark forming to obtain a formed flow channel.

8. A method for processing flow channel parts according to claim 7, characterized in that: The electrospark forming process of the prototype flow channel (4) further comprises the following steps: During the tool electrode processing, a three-coordinate measuring machine is used to inspect the dimensions of the tool electrode.

9. A method for processing flow channel parts according to claim 1 or 7, characterized in that: The electrospark forming process of the prototype flow channel (4) comprises the following steps: The sharp edge of the prototype flow channel (4) is processed by electrospark forming into a curved edge.

10. A method for processing flow channel parts according to claim 1 or 7, characterized in that: The electrospark forming process of the prototype flow channel (4) comprises the following steps: The connecting surface (5) between the prototype flow channel (4) and the inner hole (102) of the forged component (1) is subjected to electric spark forming processing.

Images