Turning tool bar facilitating machining of motor parts

Abstract

The utility model discloses a turning tool bar facilitating machining of motor parts. The turning tool bar comprises a tool body, an inner cooling device, an angle sleeve and a pressing cap. A blade groove is formed in the head of the tool body, and the turning tool is arranged in the blade groove and pressed by the pressing cap. An inner cooling device is arranged in the cutter body; the inner cooling device comprises an upper spraying pipe arranged on the upper portion of the cutter body and a lower spraying opening formed in the front end of the cutter body. The upper spraying pipe and the lower spraying opening are both communicated with a cooling water channel in the cutter body; the section of the angle sleeve is triangular, and the angle sleeve is fixed to a machine tool after being tightly attached to the side of the cutter body. The utility model has the advantages that the production cost is reduced; according to the inner cooling device, the problem of overheating during machining is well solved, the cutting performance is improved, cutting can be washed away through high-pressure cooling water, and the problem of long cuttings is well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to the technical field of metal cutting, and more particularly to a tool bar. Background Art

[0002] The motor shaft and motor end cover are one of the main components of the motor. Their production cost and efficiency directly affect the profit of the motor. The surface quality requirements of the motor shaft are high. The traditional processing method has narrow and long chips, which are very easy to scratch the surface. It is difficult for motor shafts of different models to take into account high efficiency and low vibration. In order to better assemble bearings and other parts, chamfers of 15 degrees and 20 degrees are often designed, which is difficult for ordinary machine tools to turn. Moreover, the chamfered parts are mostly stress concentration areas, and the tool life will inevitably be reduced. When the traditional vertical lathe processes the inner diameter of the motor end cover, due to the cast iron material, there are inevitably sand holes, irregular surfaces, and casting absence on the blank, which leads to intermittent cutting of the turning blade. Seriously affecting the service life of the tool. Utility Model Content

[0003] In order to solve the above problems, the utility model discloses a turning tool bar which is convenient for machining motor parts. The specific technical scheme is as follows:

[0004] A turning tool bar for convenient motor parts processing comprises a tool body, an internal cooling device, an angle sleeve and a pressing cap; a blade groove is arranged at the head of the tool body, and the turning tool is arranged in the blade groove and pressed by the pressing cap; an internal cooling device is arranged in the tool body; the internal cooling device comprises an upper nozzle arranged at the upper part of the tool body and a lower nozzle arranged at the front end of the tool body; the upper nozzle and the lower nozzle are both connected to the cooling water channel in the tool body; the angle sleeve has a triangular cross section and is fixed to the machine tool after being closely attached to the side of the tool body.

[0005] There are two lower nozzles, which are arranged on adjacent surfaces at the front end of the blade body.

[0006] The water outlets of the upper spray pipe and the lower spray port are all directed toward the blade of the turning tool.

[0007] The cooling water channel is arranged horizontally, the front end of the cooling water channel is respectively connected to the lower nozzle and the upper nozzle, and the end of the cooling water channel is connected to the water nozzle.

[0008] The upper nozzle is C-shaped, and a thread is arranged at the lower end of the upper nozzle, which is connected to a connecting pipe in a vertical direction, the connecting pipe is connected to a vertical water channel, and the vertical water channel is connected to a cooling water channel.

[0009] The cutter head is provided with a blade slot for installing a C-shaped 100-degree negative rake angle blade, forming a main rake angle of 76 degrees, a vertical rake angle and a cutting edge inclination angle of -5 degrees.

[0010] The advantages of the utility model are: reducing production costs, traditionally only using the 80-degree acute angle of the C-type blade tip, the tool bar of the present invention uses an obtuse 100-degree blade angle; the upper and lower cooling devices set on the front angle tool bar not only solve the overheating problem during processing, improve the cutting performance, but also use high-pressure cooling water to wash away the cutting, which solves the long chip problem; when cutting in reverse, 4-degree main deflection angle is used for high feed turning, and 76-degree main deflection angle in the positive direction is used for long overhang parts or thin-walled parts; the blank of the motor end cover inevitably has sand holes, irregular surfaces, and casting absence, which causes the turning blade to cut intermittently, and the strong 100-degree obtuse angle tip can well improve the tool life; multi-angle chamfering, in order to better assemble bearings and other parts, the motor shaft often needs to be designed with 15-degree and 20-degree chamfers, which is indeed difficult for ordinary machine tool turning, and the chamfered parts are mostly stress concentration areas, and the tool life will inevitably be reduced. Therefore, using an angle sleeve designed specifically for this type of tool bar can solve this problem well. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the structural diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of cutting in forward and reverse directions;

[0013] Figure 3 It is a three-dimensional schematic diagram of the knife body of the utility model;

[0014] Figure 4 It is the main view of the cutter body;

[0015] Figure 5 for Figure 4 Left view of

[0016] In the figure, 1 is the tool body, 2 is the turning tool, 3 is the blade groove, 4 is the angle sleeve, 5 is the pressure cap, 6 is the upper nozzle, 7 is the lower nozzle, 8 is the cooling water channel, 10 is the workpiece to be processed, 81 is the vertical water channel, 83 is the connecting pipe, and 84 is the water nozzle. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings. As shown in the figure, the present invention includes a cutter body 1, an internal cooling device, an angle sleeve 4 and a pressure cap 5; a blade groove 3 is provided at the head of the cutter body, a turning tool 2 is provided in the blade groove and is pressed by a pressure cap 5; an internal cooling device is provided in the cutter body; the internal cooling device includes an upper nozzle 6 provided at the upper part of the cutter body and a lower nozzle 7 provided at the front end of the cutter body; the upper nozzle 6 and the lower nozzle 7 are both connected to a cooling water channel 8 in the cutter body; the angle sleeve 4 has a triangular cross-section and is fixed to the machine tool after being closely attached to the side of the cutter body.

[0018] There are two lower nozzles 7, which are arranged on adjacent surfaces at the front end of the blade body.

[0019] The water outlets of the upper spray pipe and the lower spray port are all directed toward the blade of the turning tool.

[0020] The cooling water channel 8 is arranged horizontally, the front end of the cooling water channel is communicated with the lower nozzle 7 and the upper nozzle 6 respectively, and the end of the cooling water channel is connected to the water nozzle 84.

[0021] The upper nozzle 6 is C-shaped, and the lower end of the upper nozzle is provided with a thread, which is connected to the vertical connection pipe 83, and the connection pipe 83 is connected to the vertical water channel 81, and the vertical water channel 81 is connected to the cooling water channel 8. The transverse water channel 82 is connected to the cooling water channel 8 while communicating with the two lower nozzles.

[0022] The cutter head is provided with a blade slot for installing a C-shaped 100-degree negative rake angle blade, forming a main rake angle of 76 degrees, a vertical rake angle and a cutting edge inclination angle of -5 degrees.

[0023] The utility model sets a unique three-nozzle internal cooling system for the tool bar, namely: the upper nozzle 6 can be a copper tube and is C-shaped. This nozzle can directly aim at the front cutting area to provide high-precision cutting fluid, so as to better control chip breaking and ensure safe processing. According to the capabilities of different machine tools and the characteristics of different part materials, the cutting fluid flow rate and flow velocity can be adjusted by changing the nozzle diameter and fine-tuning the spray angle to further extend the tool life and improve the chip formation effect.

[0024] The two lower nozzles 7 below spray coolant, which can not only increase the tool life, but also increase the output by increasing the cutting speed or feed.

[0025] With the simultaneous cooling of the upper and lower ends, whether it is rough machining or fine machining; whether it is external cylindrical turning, end turning or profile turning, although the chips produced have different shapes, they can all achieve the effect of short chips and no chip entanglement.

[0026] Through repeated tests, we have also summarized a set of best application strategies on when to start the upper cutting fluid, the lower cutting fluid, or both.

[0027] 1) For blades with thin coatings on steel parts, it is best to use both upper and lower cutting fluids to provide thermal protection for the blades and avoid plastic deformation.

[0028] 2) For blades with thick coatings for machining cast iron parts. Since thick coatings have good thermal protection performance, and parts of this material have good chip breaking effects. Therefore, the best cutting effect can be achieved by simply using the following cutting fluid.

[0029] 3) For inserts with thinner coatings machining stainless steel, it is recommended to use both upper and lower cutting fluids. However, if crater wear occurs in the application, it is recommended to use only lower cutting fluid, which can obtain longer tool life.

[0030] Regarding the tool angle sleeve 4, when efficiency needs to be improved, the angle sleeve can be used to make the cutting application smaller Kr; if we encounter long overhang or thin-walled parts, we will use a larger Kr to cut the parts. The larger the Kr, the greater the tool vibration tendency. When the working conditions are stable and efficiency needs to be improved, Kr4 can be used for high feed turning; if we encounter long overhang parts or thin-walled parts, use Kr76 degrees.

[0031] The most common chamfer of motor shaft is 45 degrees. However, in order to better assemble bearings and other parts, it is often necessary to design chamfers of 15 degrees and 20 degrees, which is indeed difficult for ordinary machine tools to turn, and the chamfered parts are mostly stress concentration areas, which will inevitably reduce the tool life. Therefore, using an angle sleeve designed specifically for this type of tool bar can solve this problem well.

[0032] Since C-type blades are most widely used in machining workshops, and the blades with an acute angle of 80 degrees are discarded after being used up, in order to verify the feasibility of using a 100-degree blade tip, the team used the parts produced in the workshop as test objects. After more than a year of design research, they finally completed the optimization design of this type of tool bar, and repeatedly conducted current tests to finally obtain the optimal tool design data. The corresponding tool data is shown in Table 1.

[0033] Table 1

[0034] 1 Cutting edge angle (KAPR) 76deg 2 Tool lead angle (PSIR) 14deg 3 Maximum overhang (OHX) 45 4 Hand Left or right hand 5 Shank width (B) 32mm 6 Handle height (H) 32mm 7 Functional Length (LF) 160mm 8 Working width (WF) 27.2mm 9 Working height (HF) 32mm 10 Vertical rake angle (GAMO) -5 11 Blade inclination angle (LAMS) -5 12 Clamping mechanism Strong

[0035] Finally, for steel turning, which is the most commonly used in metalworking workshops, the following are suggestions for the use of cutting fluid: 1) It is recommended to use the following cutting fluid at any time to extend the tool life.

[0036] 2) When improved chip control is required, the upper and lower chip fluids are turned on simultaneously.

Claims

1. A turning tool bar for machining motor parts, comprising a tool body, an internal cooling device, an angle sleeve and a pressure cap; a blade groove is arranged at the head of the tool body, the turning tool is arranged in the blade groove and is pressed by the pressure cap; the angle sleeve has a triangular cross section, and is fixed to the machine tool after being closely attached to the side of the tool body; the characteristics are: An internal cooling device is arranged in the cutter body; the internal cooling device comprises an upper nozzle arranged on the upper part of the cutter body and a lower nozzle arranged at the front end of the cutter body; the upper nozzle and the lower nozzle are both connected to the cooling water channel in the cutter body; there are two lower nozzles, which are arranged on adjacent surfaces at the front end of the cutter body.

2. The tool bar for convenient motor parts processing according to claim 1, characterized in that: The water outlets of the upper spray pipe and the lower spray port are all directed toward the blade of the turning tool.

3. The tool bar for convenient motor parts processing according to claim 1 is characterized in that: The cooling water channel is arranged horizontally, the front end of the cooling water channel is respectively connected to the lower nozzle and the upper nozzle, and the end of the cooling water channel is connected to the water nozzle.

4. The turning tool bar for convenient motor parts processing according to claim 1 is characterized in that: The upper nozzle is C-shaped, and a thread is arranged at the lower end of the upper nozzle, which is connected to a connecting pipe in a vertical direction, the connecting pipe is connected to a vertical water channel, and the vertical water channel is connected to a cooling water channel.

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