Electromagnetic valve body forming cutter and machining process thereof

Abstract

The application discloses a forming tool for an electromagnetic valve body and a machining process thereof, and relates to the technical field of tools.The technical scheme is as follows: the tool comprises an integrally-formed tool head and a tool handle;the tool head comprises a tool back and a forming tool tooth arranged on the tool back;the forming tool tooth comprises a first tooth edge and a second tooth edge;the width of the second tooth edge is smaller than that of the first tooth edge;an angle-formed part is arranged between the first tooth edge and the second tooth edge;an angle-formed part is arranged on the side of the second tooth edge away from the first tooth edge;the forming tool tooth and the tool back are connected to form an eccentric structure;the forming tool tooth is arranged in multiple;the multiple forming tool teeth are arranged along the length direction of the tool head;and the forming tool tooth and the target machining stepped groove of the electromagnetic valve body correspond to each other in number and position.The application has the advantages of long service life, convenient use and high machining forming precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutters, more particularly, it relates to an electromagnetic valve body forming cutter and a processing technology thereof. BACKGROUND

[0002] The electromagnetic valve is an industrial equipment controlled by electromagnetism, is an automation basic element for controlling fluid, belongs to an actuator, and is used in an industrial control system to adjust the direction, flow, speed and other parameters of medium. The electromagnetic valve can be matched with different circuits to realize the expected control, and the control precision and flexibility can be guaranteed.

[0003] The electromagnetic valve includes an electromagnetic valve body. Due to the complex inner cavity fluid structure of the electromagnetic valve body, the electromagnetic valve body made of cast iron material is usually manufactured by using a split mold. The electromagnetic valve body after casting usually needs to be subjected to rough machining of multiple stepped grooves and finish machining of multiple stepped grooves to meet the required process requirements. However, the finish machining by using a general drill, the semi-finish machining and finish machining by using a slotting cutter cannot meet the above process requirements, mainly due to the following shortcomings:

[0004] 1. The number of stepped grooves of the electromagnetic valve body is multiple, and the stepped connection of each stepped groove is usually provided with a round corner with an R value of 0.05 mm or less. The machining precision of the cutter is very high. If multiple cutters are used for multiple machining, the installation precision of each cutter at each time is difficult to guarantee, so that the machining precision of the stepped groove and the round corner is difficult to meet the requirements.

[0005] 2. The hole diameter and the stepped groove diameter of the electromagnetic valve body are small, and the conventional indexable slotting cutter is difficult to enter.

[0006] 3. It is difficult to guarantee the consistency of batch production of the electromagnetic valve body by using multiple cutters for multiple machining.

[0007] Therefore, a new scheme needs to be proposed to solve this problem. SUMMARY

[0008] In view of the deficiencies in the prior art, the present application aims to provide an electromagnetic valve body forming cutter and a processing technology thereof, which have the advantages of long service life, convenient use and high machining precision.

[0009] The technical purposes are achieved by the following technical solutions: an electromagnetic valve body forming tool, comprising an integrally formed tool head and tool handle, the tool head comprises a tool back and a forming tool tooth arranged on the tool back, the forming tool tooth comprises a first tooth edge and a second tooth edge, the width of the second tooth edge is smaller than that of the first tooth edge, a fillet forming part is arranged between the first tooth edge and the second tooth edge, a chamfer forming part is arranged on the side of the second tooth edge away from the first tooth edge, the forming tool tooth and the tool back are connected to form an eccentric structure, the forming tool tooth is arranged in plurality, and the plurality of forming tool teeth are arranged along the length direction of the tool head, and the forming tool tooth and the target machining stepped groove of the electromagnetic valve body correspond one by one in number and position.

[0010] In one of the embodiments, the first tooth edge comprises a first edge, and the second tooth edge comprises a second edge, the distance between the second edge and the extension line of the center axis of the tool handle is an eccentric radius, the eccentric radius is 7.1mm-7.3mm, and the diameter of the tool handle is 16mm.

[0011] In one of the embodiments, a tapered connecting part is arranged between the tool handle and the tool head, and a fillet transition part is arranged between the tapered connecting part and the tool head.

[0012] In one of the embodiments, the length of the tool head is 46mm, and the width is 11.5mm.

[0013] In one of the embodiments, the forming tool tooth further comprises a tool front face coplanar with the central longitudinal section of the tool head, a secondary front face arranged below the front side of the tool front face, a tool back face arranged on the rear side of the tool front face, and a secondary back face arranged below the tool back face, the secondary back face is below the tool back face, the included angle between the tool front face and the secondary front face is 110°, the tool back face is an arc face, the included angle between the tangent line of the tool back face and the secondary back face is 46.9°, and the distance between the intersection position between the tool back face and the secondary back face and the tool front face is 3mm.

[0014] In one of the embodiments, the height of the forming tool tooth is 2.5mm.

[0015] In one of the embodiments, the forming tool is a cemented carbide forming tool.

[0016] A machining process of an electromagnetic valve body forming tool, used for machining any electromagnetic valve body forming tool, comprising the following steps:

[0017] S1, selecting material: selecting cemented carbide as the forming tool material;

[0018] S2, machining the forming tool blank: the selected tool material is machined into a forming tool blank through a cylindrical grinder, the forming tool blank comprises a tool handle material part and a tool head material part;

[0019] S3, rough forming cutter teeth: the forming cutter teeth are formed by slow wire feeding rough machining;

[0020] S4, finishing forming cutter teeth: the rough forming cutter teeth are finished by electric discharge machining;

[0021] S5, passivation treatment: the finished forming cutter teeth are polished and passivated

[0022] In one embodiment, after step S5, a PVD coating is applied to the surface of the forming tool.

[0023] In one embodiment, the shank material part and the head material part in step S2 are respectively left with a machining allowance of 0.1mm.

[0024] In summary, the present application has the following beneficial effects:

[0025] 1. By setting the forming cutter teeth corresponding to the number of stepped grooves of the electromagnetic valve body, and setting a fillet forming part between the first tooth edge and the second tooth edge, the machining of the fillet and the multiple stepped grooves in the electromagnetic valve body is realized by one tool, the machining precision of the electromagnetic valve body is improved, and the consistency of the size of the batch-produced electromagnetic valve body is ensured.

[0026] 2. By connecting the forming cutter teeth and the back to form an eccentric structure, the tool can easily enter the valve body of the electromagnetic valve when used towards a position deviating from the axis of the electromagnetic valve body, and interference is not easy to occur.

[0027] 3. The forming tool is made of hard alloy material, which improves the cutting rigidity of the forming tool and also improves the service life.

[0028] 4. By setting the back and the secondary back, the frictional resistance between the back and the electromagnetic valve body can be effectively reduced, and by setting the front and the secondary front, the cutting resistance of the forming tool can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure diagram of the electromagnetic valve body forming tool of the embodiment of the present application;

[0030] Figure 2 It is a front view of the electromagnetic valve body forming tool of the embodiment of the present application;

[0031] Figure 3 It is Figure 2 an enlarged view of part A;

[0032] Figure 4 Figure 2 a sectional view at B-B;

[0033] Figure 5 A flow chart of the machining process of the electromagnetic valve body forming tool of the embodiment of the present application.

[0034] In the figure: 1, tool handle; 2, tool head; 21, tool back; 22, forming tool tooth; 221, first tooth edge; 2211, first edge; 222, second tooth edge; 2221, second edge; 223, round corner forming part; 224, chamfer forming part; 225, auxiliary front face; 226, tool front face; 227, tool back face; 228, auxiliary back face; 3, tapered connecting part; 4, round corner transition part. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] As Figures 1 to 4 shown, the embodiment of the present application provides an electromagnetic valve body forming tool, which comprises an integrally formed tool head 2 and tool handle 1. The tool head 2 comprises a tool back 21 and a forming tool tooth 22 arranged on the tool back 21, the forming tool tooth 22 comprises a first tooth edge 221 and a second tooth edge 222, the width of the second tooth edge 222 is smaller than that of the first tooth edge 221, a round corner forming part 223 is arranged between the first tooth edge 221 and the second tooth edge 222, and a chamfer forming part 224 is arranged on the side of the second tooth edge 222 away from the first tooth edge 221. The forming tool tooth 22 and the tool back 21 form an eccentric structure, the forming tool tooth 22 is arranged in multiple, and the multiple forming tool teeth 22 are arranged along the length direction of the tool head 2, and the forming tool tooth 22 and the target machining stepped groove of the electromagnetic valve body correspond one by one in number and position.

[0037] In the above arrangement, the forming tool tooth 22 corresponding to the number of stepped grooves of the electromagnetic valve body is arranged, and the round corner forming part 223 is arranged between the first tooth edge 221 and the second tooth edge 222, so that the finishing machining requirement of the round corner and the multiple stepped grooves in the electromagnetic valve body is realized by one tool, the machining precision of the electromagnetic valve body is improved, and the consistency of the size of the batch-produced electromagnetic valve body is ensured; the forming tool tooth 22 and the tool back 21 form an eccentric structure, and when used, the position deviating from the axis of the electromagnetic valve body can easily enter the valve body of the electromagnetic valve, and the interference condition is not easy to occur.

[0038] In the embodiment, the first tooth edge 221 comprises a first edge 2211, the second tooth edge 222 comprises a second edge 2221, the distance between the second edge 2221 and the extension line of the center axis of the shank 1 is an eccentric radius, the eccentric radius is 7.1mm-7.3mm, and the eccentric radius can be 7.1mm, 7.281mm and 7.3mm, and the eccentric radius is preferably 7.281mm in the embodiment, and the diameter of the shank 1 is 16mm.

[0039] In the embodiment, the shank 1 and the head 2 are provided with a tapered connecting part 3, and the tapered connecting part 3 is provided with a round corner transition part 4. The tapered connecting part 3 and the round corner transition part 4 make the transition of the shank 1 and the head 2 more natural, and are beneficial to improving the integrated stability of the shank 1 and the head 2.

[0040] In the embodiment, the length of the head 2 is 46mm, and the width of the head 2 is 11.5mm.

[0041] In the embodiment, the profiled cutter tooth 22 further comprises a front face 226 coplanar with the central longitudinal section of the head 2, a secondary front face 225 arranged below the front side of the front face 226, a rear face 227 arranged on the rear side of the front face 226, and a secondary rear face 228 arranged below the rear face 227, the included angle between the front face 226 and the secondary front face 225 is 110°, the rear face 227 is an arc face, the included angle between the tangent line of the rear face 227 and the secondary rear face 228 is 46.9°, and the distance between the intersection position of the rear face 227 and the secondary rear face 228 and the front face 226 is 3mm.

[0042] In the above mode, the rear face 227 and the secondary rear face 228 can effectively reduce the frictional resistance between the rear face 227 and the electromagnetic valve body, and the front face 226 and the secondary front face 225 can effectively reduce the cutting resistance of the profiled cutter.

[0043] In the embodiment, the height of the profiled cutter tooth 22 is 2.5mm.

[0044] In the embodiment, the profiled cutter is a hard alloy profiled cutter, the profiled cutter is made of hard alloy material, the cutting rigidity of the profiled cutter is improved, and the service life is also improved.

[0045] As shown in Figure 5 The application also discloses a machining process of the electromagnetic valve body profiled cutter, which is used for machining any electromagnetic valve body profiled cutter and comprises the following steps.

[0046] S1, material selection: selecting hard alloy as the profiled cutter material;

[0047] S2, machining forming tool blank: the selected tool material is ground by the external grinding machine to obtain the forming tool blank, the forming tool blank includes a handle 1 material part and a tool bit 2 material part;

[0048] S3, rough machining forming tool teeth 22: the forming tool teeth 22 are formed by slow wire machining;

[0049] S4, finishing forming tool teeth 22: the rough machining forming tool teeth 22 are finished by using the method of electric discharge machining;

[0050] S5, passivation treatment: the finished forming tool teeth 22 are polished and passivated.

[0051] By using the above processing technology, compared with the traditional method, the hard alloy is selected as the forming tool material in the present application, which can meet the rigidity requirement without heat treatment, and the forming tool teeth 22 do not need to be milled and processed, which effectively improves the machining precision and machining efficiency of the forming tool.

[0052] In this embodiment, after step S5, a PVD coating is coated on the surface of the forming tool. By setting the PVD coating, the wear resistance of the forming tool can be increased, and the PVD coating is specifically used in the prior art, which is not described in detail in this embodiment.

[0053] In this embodiment, the handle 1 material part and the tool bit 2 material part in step S2 are respectively reserved with a machining allowance of 0.1mm. By reserving the machining allowance, the finishing of the forming tool can be gradually realized.

[0054] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution belonging to the idea of the present application is within the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. A cutting tool for forming an electromagnetic valve body, comprising an integrally formed cutting head (2) and a cutting shank (1), characterized in that: The cutting head (2) includes a back (21) and shaped cutting teeth (22) disposed on the back (21). The shaped cutting teeth (22) include a first cutting edge (221) and a second cutting edge (222). The width of the second cutting edge (222) is smaller than the width of the first cutting edge (221). A rounded corner forming part (223) is disposed between the first cutting edge (221) and the second cutting edge (222). A chamfer forming part (224) is disposed on the side of the second cutting edge (222) away from the first cutting edge (221). The shaped cutting teeth (22) and the back (21) are connected to form an eccentric structure. There are multiple shaped cutting teeth (22). The multiple shaped cutting teeth (22) are arranged along the length direction of the cutting head (2). The shaped cutting teeth (22) and the target machining stepped groove of the solenoid valve body correspond one-to-one in number and position. The forming cutter tooth (22) also includes a front cutter head (226) coplanar with the central longitudinal section of the cutter head (2), a secondary front cutter head (225) located below the front side of the front cutter head (226), a rear cutter head (227) and a secondary rear cutter head (228) located behind the front cutter head (226). The secondary rear cutter head (228) is located below the rear cutter head (227). The included angle between the front cutter head (226) and the secondary front cutter head (225) is 110°. The rear cutter head (227) is an arc surface. The included angle between the tangent of the rear cutter head (227) and the secondary rear cutter head (228) is 46.9°. The distance between the junction of the rear cutter head (227) and the secondary rear cutter head (228) and the front cutter head (226) is 3 mm.

2. The electromagnetic valve body forming tool according to claim 1, characterized in that: The first toothed edge (221) includes a first cutting edge (2211), the second toothed edge (222) includes a second cutting edge (2221), the distance between the second cutting edge (2221) and the extension line of the central axis of the handle (1) is the eccentric radius, the eccentric radius is 7.1mm-7.3mm, and the diameter of the handle (1) is 16mm.

3. The electromagnetic valve body forming tool according to claim 1, characterized in that: A tapered connecting part (3) is provided between the handle (1) and the blade (2), and a rounded transition part (4) is provided between the tapered connecting part (3) and the blade (2).

4. The electromagnetic valve body forming tool according to claim 1, characterized in that: The blade (2) has a length of 46 mm and a width of 11.5 mm.

5. The electromagnetic valve body forming tool according to claim 2, characterized in that: The height of the forming cutter teeth (22) is 2.5 mm.

6. The electromagnetic valve body forming tool according to claim 1, characterized in that: The forming tool is a cemented carbide forming tool.

7. A machining process for a solenoid valve body forming tool, used for machining the solenoid valve body forming tool as described in any one of claims 1-6, characterized in that: Includes the following steps: S1. Material Selection: Carbide is selected as the material for forming tools; S2. Machining the tool blank: The selected tool material is ground externally to obtain the tool blank, which includes the tool holder (1) material part and the tool head (2) material part; S3, Rough machining forming teeth (22): The forming teeth (22) are formed by rough machining using a slow wire EDM method; S4. Finishing the forming cutter teeth (22): The forming cutter teeth (22) after roughing are finished by electrical discharge machining. S5. Passivation treatment: Polish and passivate the shaped cutting teeth (22) after finishing.

8. The machining process of the electromagnetic valve body forming tool according to claim 7, characterized in that: After completing step S5, a PVD coating is applied to the surface of the forming tool.

9. The machining process of the electromagnetic valve body forming tool according to claim 7, characterized in that: In step S2, the material portion of the tool holder (1) and the material portion of the tool head (2) each have a machining allowance of 0.1 mm.

Images