Double-row combined milling cutter for machining key groove

Abstract

The utility model relates to a double-row combined milling cutter for machining a key groove, and solves the technical problems that in the prior art, when a saw blade milling cutter is used for machining a long key groove in a motor shaft of an electric submersible pump, the efficiency is low, a cutter is prone to tipping, and the size of the machined key groove is unstable and uneven. The utility model relates to a double-blade cutter which comprises a cutter handle, a cutter handle sleeve, a cutter handle gland, a cutter head fixing hexagon socket screw, a first cutter head, a second cutter head, a first blade fixing seat, a second blade fixing seat, a first blade and a second blade, a cutter head connecting shaft extension part is arranged on the front portion of the cutter handle, a threaded hole is formed in the front end of the cutter handle, and the cutter head connecting shaft extension part is sleeved with the first cutter head. The cutter head connecting shaft extension part is sleeved with the cutter handle sleeve, the cutter head connecting shaft extension part is sleeved with the second cutter head, the cutter handle sleeve is located between the second cutter head and the first cutter head, a center through hole is formed in the cutter handle gland, and the cutter head fixing hexagon socket screw penetrates through the center through hole of the cutter handle gland and then is connected with a threaded hole in the front end of the cutter handle. And the plurality of second blades are connected with the second cutterhead. The key groove machining device is widely used for machining key grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters in industrial production, in particular to a double-row combined milling cutter for machining keyways. Background Art

[0002] In the field of oil extraction technology, electric submersible pumps are key equipment. Electric submersible pumps include permanent magnet synchronous motors and rotors and other components. The motor shaft of the permanent magnet synchronous motor drives the rotor to rotate, and a long keyway is provided on the motor shaft for assembly with the rotor.

[0003] During the manufacturing process of the motor shaft, the long keyway on the motor shaft is processed by a saw blade milling cutter. The structure of the saw blade milling cutter can refer to the utility model patent with the authorization announcement number CN217858974U. However, the use of saw blade milling cutters for processing has the disadvantages of low efficiency, easy chipping of the tool blade, and unstable and uneven dimensions of the processed keyway (for example, the Figure 8 As shown, the width of the keyway in the depth direction is uneven). Therefore, how to improve the long keyway processing method on the motor shaft, improve the processing efficiency, avoid the occurrence of chipping, and accurately control the depth size of the keyway is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The utility model provides a double-row combined milling cutter for machining keyways, which has high efficiency and can accurately control the keyway size, in order to solve the technical problems that when a saw blade milling cutter is used in the prior art to machine a long keyway for a motor shaft of an electric submersible pump, the efficiency is low, the tool is prone to chipping, and the size of the machined keyway is unstable and uneven.

[0005] The utility model provides a double-row combined milling cutter for machining key slots, comprising a tool handle, a tool handle sleeve, a tool handle pressure cover, a tool disc fixing hexagonal bolt, a first tool disc, a second tool disc, a first blade fixing seat, a second blade fixing seat, a first blade and a second blade, a tool disc connecting shaft extension portion is provided at the front part of the tool handle, a threaded hole is provided at the front end of the tool handle, the first tool disc is sleeved on the tool disc connecting shaft extension portion, the end face of the first tool disc abuts against the circumferential platform at the root of the tool disc connecting shaft extension portion, the tool handle sleeve is sleeved on the tool disc connecting shaft extension portion, the second tool disc is sleeved on the tool disc connecting shaft extension portion, and the tool handle sleeve is located at the second Between the cutter disc and the first cutter disc, a center through hole is provided on the knife handle pressure cover, and the cutter disc fixing hexagon socket bolt passes through the center through hole of the knife handle pressure cover and is connected to the threaded hole at the front end of the knife handle, the knife handle pressure cover presses the second cutter disc, the second cutter disc presses the knife handle sleeve, and the knife handle sleeve presses the first cutter disc; the hexagon socket bolt passes through the first blade fixing seat and is connected to the threaded hole on the first cutter disc, a plurality of first blade fixing seats are evenly distributed along the circumferential direction of the first cutter disc, a blade fastening screw passes through the first blade and is connected to the threaded hole on the first blade fixing seat, and a plurality of first blades are evenly distributed along the circumferential direction of the first cutter disc;

[0006] A hexagon socket bolt is passed through the second blade fixing seat and connected to the threaded hole on the second cutter disc, and a plurality of second blade fixing seats are evenly distributed along the circumferential direction of the second cutter disc, and a blade fastening screw is passed through the second blade and connected to the threaded hole on the second blade fixing seat, and a plurality of second blades are evenly distributed along the circumferential direction of the second cutter disc;

[0007] The cutting edge portion of the first blade protrudes outward from the peripheral edge of the first blade disc, and the cutting edge portion of the second blade protrudes outward from the peripheral edge of the second blade disc.

[0008] Preferably, the second blade fixing seat is provided with a second blade positioning groove, and the second blade is located in the second blade positioning groove; the first blade fixing seat is provided with a first blade positioning groove, and the first blade is located in the first blade positioning groove.

[0009] Preferably, the rear portion of the knife handle is conical, and a threaded hole is provided at the rear end of the knife handle.

[0010] Preferably, a positioning disc portion is provided in the middle of the knife handle, and the positioning disc portion is provided with a positioning groove.

[0011] Preferably, a first threaded hole is provided on the inner side of the second blade fixing seat, a first adjusting bolt is connected to the first threaded hole, and an end of the first adjusting bolt abuts against the inner side of the second blade disc;

[0012] A second threaded hole is provided on the inner side of the first blade fixing seat, the second threaded hole is connected to a second adjusting bolt, and the end of the second adjusting bolt abuts against the inner side of the first cutter disc.

[0013] Preferably, the double-row combined milling cutter for machining keyways further comprises a gasket, which is sleeved on the front portion of the cutter disc connecting shaft extension, and the gasket is located between the tool handle sleeve and the first cutter disc.

[0014] The utility model has the beneficial effects of processing a long keyway on a motor shaft with high efficiency, avoiding chipping of the blade, and making the size of the processed keyway stable and uniform, and being able to accurately control the size of the keyway. The blade can be easily and quickly disassembled and assembled. Two workpieces can be processed at the same time, and the processing efficiency is greatly improved.

[0015] Further features and aspects of the present invention will be clearly described in the following description of specific embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric view of a double-row combination milling cutter used for machining keyways;

[0017] Figure 2 This is the front view of a double-row combination milling cutter used for machining keyways;

[0018] Figure 3 yes Figure 2Sectional view in the AA direction;

[0019] Figure 4 yes Figure 1 a side view of the structure shown;

[0020] Figure 5 is a cross-sectional view of the connection structure between the handle gland and the handle;

[0021] Figure 6 yes Figure 1 The structure diagram of the structure shown in FIG. 1 is a structure diagram after removing three second blades;

[0022] Figure 7 yes Figure 6 a side view of the structure shown;

[0023] Figure 8 It is a schematic diagram of a long keyway machined by a milling cutter in the prior art;

[0024] Fig. 9 It is a schematic diagram of the utility model double-row combined milling cutter machining a long keyway on a motor shaft;

[0025] Fig.10 yes Fig. 9 A partial enlarged view of the keyway machined by the second blade;

[0026] Fig.11 It is a structural schematic diagram of a gasket mounted on the cutter head connecting shaft extension of the tool handle.

[0027] Explanation of symbols in the figure:

[0028] 1. Tool handle, 1-1. Tool disc connecting shaft extension, 1-2. Threaded hole, 1-3. Positioning disc, 1-3-1. Positioning groove, 2. Tool handle sleeve, 3. Tool handle pressure cover, 4. Tool disc fixing hexagon socket bolt, 5. First tool disc, 6. Second tool disc, 7. First blade fixing seat, 8. Second blade fixing seat, 8-1. Second blade positioning groove, 9. Hexagon socket bolt, 10. Hexagon socket bolt, 11. First blade, 12. Second blade, 13. Blade fastening screw, 14. Blade fastening screw, 15. Adjustment bolt; 16. Motor shaft, 16-1. Long keyway, 17. Motor shaft, 17-1. Long keyway, 18. Motor shaft, 19. Gasket. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings by way of specific embodiments.

[0030] like Figure 1-7As shown, the double-row combined milling cutter for machining keyways comprises a tool handle 1, a tool handle sleeve 2, a tool handle pressure cover 3, a cutter disc fixing hexagon socket bolt 4, a first cutter disc 5, a second cutter disc 6, a first blade fixing seat 7, a second blade fixing seat 8, a hexagon socket bolt 9, a hexagon socket bolt 10, a first blade 11, and a second blade 12. The front portion of the tool handle 1 is provided with a cutter disc connecting shaft extension 1-1, and the front end of the tool handle 1 is provided with a threaded hole 1-2. The first cutter disc 5 is sleeved on the cutter disc connecting shaft extension 1-1, and the end face of the first cutter disc 5 abuts against the cutter disc connecting shaft extension 1-1. On the circumferential platform at the root of the connecting shaft extension part 1-1, the tool handle sleeve 2 is sleeved on the cutter disc connecting shaft extension part 1-1, the second cutter disc 6 is sleeved on the cutter disc connecting shaft extension part 1-1, the tool handle sleeve 2 is located between the second cutter disc 6 and the first cutter disc 5, the tool handle pressure cover 3 is provided with a central through hole, the cutter disc fixing hexagon socket bolt 4 passes through the central through hole of the tool handle pressure cover 3 and is connected to the threaded hole 1-2 at the front end of the tool handle 1, the tool handle pressure cover 3 presses the second cutter disc 6, the second cutter disc 6 presses the tool handle sleeve 2, and the tool handle sleeve 2 presses the first cutter disc 5, thereby fixing the two cutter discs. The hexagon socket bolt 9 passes through the first blade fixing seat 7 and is connected to the threaded hole on the first cutter disc 5, so that the first blade fixing seat 7 is fixed to the first cutter disc 5. Several first blade fixing seats 7 are evenly distributed along the circumferential direction of the first cutter disc 5 (12 first blade fixing seats 7 are shown in the figure only for example); the blade fastening screw 13 passes through the first blade 11 and is connected to the threaded hole on the first blade fixing seat 7, so that the first blade 11 is fixed to the first blade fixing seat 7. One first blade 11 is installed on one first blade fixing seat 7. There are 12 first blades shown in the figure, and the 12 first blades are evenly distributed along the circumferential direction of the first cutter disc 5.

[0031] The hexagon socket bolt 10 is passed through the second blade fixing seat 8 and connected to the threaded hole on the second cutter disc 6 to fix the second blade fixing seat 8 on the second cutter disc 6. Several second blade fixing seats 8 are evenly distributed along the circumference of the second cutter disc 6 (the figure shows 12 second blade fixing seats 8 for example only). The blade fastening screw 14 is passed through the second blade 12 and connected to the threaded hole on the second blade fixing seat 8 to fix the second blade 12 on the second blade fixing seat 8. One second blade 12 is installed on one second blade fixing seat 8. The figure shows 12 second blades 12, and the 12 second blades are evenly distributed along the circumference of the second cutter disc 6. Figure 6 and 7 It can be seen that the second blade fixing seat 8 is provided with a second blade positioning groove 8-1, and the second blade 12 is located in the second blade positioning groove 8-1. Similarly, the first blade fixing seat 7 is provided with a first blade positioning groove.

[0032] like Figure 1 and 2 As shown, the cutting edge of the first blade 11 extends outward from the peripheral edge of the first blade disc 5. Figure 4 ,6 As shown in FIG. 7 , the cutting edge of the second blade 12 protrudes outward from the peripheral edge of the second blade disc 6 .

[0033] like Figure 3 and 4 As shown, an adjusting bolt 15 may be provided, the adjusting bolt 15 is connected to the threaded hole on the inner side of the second blade fixing seat 8, and the end of the adjusting bolt 15 abuts against the inner side of the second cutter disc 6. The adjusting bolt 15 is used for fine adjustment, and the hexagon socket bolt 10 is slightly loosened, and the adjusting bolt 15 is screwed to fine-tune the position of the second blade fixing seat 8 in the radial direction. After adjustment, the hexagon socket bolt 10 is tightened.

[0034] Similarly, a threaded hole is provided on the inner side of the first blade fixing seat, an adjusting bolt is connected to the threaded hole, and the end of the adjusting bolt abuts against the inner side of the first cutter disc.

[0035] The handle sleeve 2 separates the two cutter discs, and there is a certain distance between the two cutter discs, that is, there is a certain distance between the first blades 11 and the second blades 12. In fact, the milling cutter is provided with two rows of blades.

[0036] The rear part of the knife handle 1 is conical, and a threaded hole is arranged at the rear end of the knife handle 1.

[0037] A positioning disc portion 1-3 for installation is provided in the middle of the shank 1, and a positioning groove 1-3-1 is provided in the positioning disc portion 1-3.

[0038] The following describes the process of machining the motor shaft for an electric submersible pump:

[0039] The first step is to use the above-mentioned double-row combination milling cutter for machining keyways, insert the conical rear part of the tool handle 1 into the tapered hole of the shaft of the drive motor, and after the conical rear part of the tool handle 1 is tightly matched with the tapered hole of the motor shaft, use a pull rod to tighten the rear end threaded hole of the tool handle 1 for locking.

[0040] It should be noted that the rear portion of the tool handle 1 is conical, the rear end is provided with a threaded hole, and the middle portion is provided with a positioning disc portion 1-3, which are all conventional structures of common milling cutters on the market.

[0041] In the second step, the motor is started, and the first cutter head 5 and the second cutter head 6 rotate to mill a keyway on the motor shaft to be processed, such as Fig. 9 and 10 As shown, the processed long keyway has stable and uniform dimensions, and the size of the keyway can be accurately controlled. The processing efficiency is high, and the chipping of the edge is avoided. The depth of the processed long keyway 17-1 is generally 1 to 2 mm. In addition, Fig. 9 As shown, the double-row combined milling cutter of the utility model can process two motor shafts at the same time, and the processing efficiency is high.

[0042] refer to Fig.11 A gasket 19 can be provided, and the gasket 19 is sleeved on the front portion provided with a cutter disc connecting shaft extension 1-1. The gasket 19 is located between the tool handle sleeve 2 and the first cutter disc 5, thereby changing the distance between the first cutter disc 5 and the second cutter disc 6, thereby adapting to the two motor shafts to be processed with different spacings.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes.

Claims

1. A double-row combined milling cutter for machining keyways, characterized in that: The utility model comprises a knife handle, a knife handle sleeve, a knife handle pressure cover, a knife disc fixing hexagon socket bolt, a first knife disc, a second knife disc, a first blade fixing seat, a second blade fixing seat, a first blade and a second blade, the front part of the knife handle is provided with a knife disc connecting shaft extension part, the front end of the knife handle is provided with a threaded hole, the first knife disc is sleeved on the knife disc connecting shaft extension part, the end face of the first knife disc abuts against the circumferential platform at the root of the knife disc connecting shaft extension part, the knife handle sleeve is sleeved on the knife disc connecting shaft extension part, the second knife disc is sleeved on the knife disc connecting shaft extension part, and the knife handle sleeve is located between the second knife disc and the first knife disc The knife handle pressure cover is provided with a central through hole, the knife disc fixing hexagon socket bolt passes through the central through hole of the knife handle pressure cover and is connected to the threaded hole at the front end of the knife handle, the knife handle pressure cover presses the second knife disc, the second knife disc presses the knife handle sleeve, and the knife handle sleeve presses the first knife disc; the hexagon socket bolt passes through the first blade fixing seat and is connected to the threaded hole on the first blade fixing seat, a plurality of first blades are evenly distributed along the circumferential direction of the first knife disc, the blade fastening screw passes through the first blade and is connected to the threaded hole on the first blade fixing seat, a plurality of first blades are evenly distributed along the circumferential direction of the first knife disc; A hexagon socket bolt is passed through the second blade fixing seat and connected to the threaded hole on the second cutter disc, and a plurality of second blade fixing seats are evenly distributed along the circumferential direction of the second cutter disc, and a blade fastening screw is passed through the second blade and connected to the threaded hole on the second blade fixing seat, and a plurality of second blades are evenly distributed along the circumferential direction of the second cutter disc; The cutting edge portion of the first blade extends outward from the peripheral edge of the first blade disc, and the cutting edge portion of the second blade extends outward from the peripheral edge of the second blade disc.

2. The double-row combined milling cutter for machining keyways according to claim 1, characterized in that: The second blade fixing seat is provided with a second blade positioning groove, and the second blade is located in the second blade positioning groove; the first blade fixing seat is provided with a first blade positioning groove, and the first blade is located in the first blade positioning groove.

3. The double-row combined milling cutter for machining keyways according to claim 1 or 2, characterized in that: The rear part of the knife handle is conical, and a threaded hole is arranged at the rear end of the knife handle.

4. The double-row combined milling cutter for machining keyways according to claim 3, characterized in that: A positioning disc portion is provided in the middle of the knife handle, and a positioning groove is provided in the positioning disc portion.

5. The double-row combined milling cutter for machining keyways according to claim 1 or 2, characterized in that: A first threaded hole is provided on the inner side of the second blade fixing seat, and a first adjusting bolt is connected to the first threaded hole, and an end of the first adjusting bolt abuts against the inner side of the second blade disc; A second threaded hole is provided on the inner side of the first blade fixing seat, the second threaded hole is connected to a second adjusting bolt, and the end of the second adjusting bolt abuts against the inner side of the first cutter disc.

6. The double-row combined milling cutter for machining keyways according to claim 5, characterized in that: The double-row combined milling cutter for machining keyways also includes a gasket, which is sleeved on a cutter head connecting shaft extension portion at the front, and is located between the tool handle sleeve and the first cutter head.

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