Machining method of four-side rib disc screw roll ring

Abstract

The invention provides a processing method of a four-side rib disc screw roll collar, which is applied to a numerical control milling machine and comprises the following steps: S1, selecting a cutter bar with the diameter of 9.0-9.5 mm, installing a blade with the size of 1.8-2.2 mm * 50-60 mm, and adjusting the angle of a cutter point to 74-76 degrees; s2, setting the compensation amount of the turning radius of the cutter to be less than or equal to 0.05 S3, a lettering tool of a four-blade structure is adopted for machining, and the specification of the lettering tool is D5.5-6.5 * 50-55 * 0.35-0.45 * 65-75; s4, the rotating speed of a main shaft is controlled to be 1200-1800 rpm, and the feeding speed is controlled to be 50-100 mm / min; and S5, cutting machining is conducted, and the cutting depth of each layer is controlled to range from 0.2 mm to 0.6 mm. According to the method, the common problem of cutter breakage in the traditional machining process is effectively solved, the character edge burr height is precisely controlled to be smaller than or equal to 0.03 mm, the roller ring surface roughness Ra is optimized to be smaller than or equal to 1.6 microns, and the size precision is stably kept to be smaller than or equal to 0.03 mm. In addition, accurate control over machining of various types of steel such as high-carbon steel and alloy steel is achieved, the size fluctuation ratio is reduced to be within 0.02 mm, and the machining efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a machining method of a four-surface rib disc screw roller ring. BACKGROUND

[0002] In the production field of high-speed wire disc screw products, the machining precision of the roller ring transverse rib plays a decisive role in the size qualification rate and surface quality of the rolled screw. However, the current technical system has obvious shortcomings: In the machining process of the traditional numerical control milling machine, the setting of parameters such as spindle speed, feed speed and cutting depth depends on manual experience, which is difficult to adapt to the cutting characteristics of different steel grades such as high-carbon steel and alloy steel. This leads to a tool vibration amplitude exceeding 15μm and poor machining stability.

[0003] Furthermore, the diameter of the milling tool bar is too small (originally 8.6mm), which makes the tool rotation radius compensation too large and the blade rigidity insufficient, thereby causing the problem of tool breakage and transverse rib size out-of-tolerance. In addition, the number of crosscutters of the character cutter is small (originally 3), the chip removal structure is single, and the iron chips accumulate during machining, which aggravates tool wear, resulting in blurred character depth and edge burr height exceeding 0.1mm.

[0004] In addition, due to the lack of real-time quality monitoring and parameter dynamic adjustment mechanism, the roller ring grinding groove surface roughness Ra>2.0μm, the character height standard deviation of the character cutter is >0.05mm, which is far from meeting the requirement of size precision ≤0.03mm of the high-quality steel product.

[0005] The above technical bottlenecks have caused the size qualification rate of disc screw products to be less than 90% for a long time, which has seriously restricted the market expansion of high-speed disc screw new steel varieties and the improvement of enterprise competitiveness. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the present application provides a.

[0007] The present application adopts the following technical solutions.

[0008] A machining method of a four-surface rib disc screw roller ring, which is applied to a numerical control milling machine, comprising the following steps: S1, selecting a tool bar with a diameter of 9.0-9.5mm, installing a blade with a size of 1.8-2.2mm×50-60mm, and adjusting the tool tip angle to 74°-76°; S2, setting the tool rotation radius compensation ≤0.05mm; S3, using a character cutter with a four-blade structure for machining, the character cutter has a specification of D5.5-6.5×50-55×0.35-0.45×65-75; S4, control the spindle speed to be 1200-1800 rpm, and the feed speed to be 50-100 mm / min; S5, cutting processing is carried out, and the cutting depth of each layer is controlled to be 0.2-0.6 mm.

[0009] Further, the rake angle of the blade is 11°-13°, the relief angle is 7°-9°, and the width of the chisel edge is 1.8-2.2 mm.

[0010] Further, the lettering tool adopts a four-blade symmetrical structure, the blade tip arc radius is R0.04-0.06 mm, and the surface is coated with a TiAlN nano coating.

[0011] Further, the single lettering depth during the lettering processing is 0.3-0.5 mm.

[0012] Further, the method further comprises reducing the idle tool travel by using a dynamic tool path planning, optimizing the processing stability by using an adaptive cutting force control algorithm, and adjusting the feed speed by monitoring the processing vibration in real time.

[0013] Further, the tool shank is of an internal cooling type structure, the cooling liquid pressure is 3-5 MPa, and the flow rate is 8-12 L / min.

[0014] Further, the thickness of the TiAlN nano coating is 3-5 μm, and the microhardness is HV2800-3200.

[0015] Further, the tool runout is detected before processing, and the radial runout is not more than 0.02 mm.

[0016] The method has the following beneficial effects: The application discloses a high-precision machining method for a four-face rib disc roller ring. Specific embodiments

[0017] The application is further explained below in combination with specific embodiments: A method for machining a four-sided ribbed disc spiral roller ring, applied to a CNC milling machine, includes the following steps: S1. Select a tool holder with a diameter of 9.0-9.5mm, install a 1.8-2.2mm×50-60mm blade, and adjust the blade tip angle to 74°-76°; S2. Set the tool rotation radius compensation to ≤0.05mm; S3. The engraving tool with a four-blade structure is used for processing. The engraving tool has the following specifications: D5.5-6.5×50-55×0.35-0.45×65-75. S4. Control the spindle speed to 1200-1800 rpm and the feed rate to 50-100 mm / min; S5. Perform cutting processing, with the cutting depth of each layer controlled at 0.2-0.6mm.

[0018] Preferably, the blade has a rake angle of 11°-13°, a clearance angle of 7°-9°, and a transverse blade width of 1.8-2.2 mm.

[0019] Preferably, the engraving tool adopts a four-blade symmetrical structure with a blade tip radius of R0.04-0.06mm and a TiAlN nano-coating on its surface.

[0020] Preferably, the depth of a single engraving operation is 0.3-0.5 mm.

[0021] Preferably, the method also includes using dynamic toolpath planning to reduce idle tool travel, using adaptive cutting force control algorithms to optimize machining stability, and monitoring machining vibration in real time and adjusting the feed rate.

[0022] Preferably, the tool holder of the cutting tool has an internal cooling structure, with a coolant pressure of 3-5 MPa and a flow rate of 8-12 L / min.

[0023] Preferably, the thickness of the TiAlN nanocoating is 3-5 μm, and the microhardness is HV2800-3200.

[0024] Preferably, tool runout is detected before machining, and the radial runout does not exceed 0.02mm.

[0025] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for machining a four-sided ribbed disc spiral roller ring, the method being applied to a CNC milling machine, characterized in that, Includes the following steps: S1. Select a tool holder with a diameter of 9.0-9.5mm, install a 1.8-2.2mm×50-60mm blade, and adjust the blade tip angle to 74°-76°; S2. Set the tool rotation radius compensation to ≤0.05mm; S3. The engraving tool with a four-blade structure is used for processing. The engraving tool has the following specifications: D5.5-6.5×50-55×0.35-0.45×65-75. S4. Control the spindle speed to 1200-1800 rpm and the feed rate to 50-100 mm / min; S5. Perform cutting processing, with the cutting depth of each layer controlled at 0.2-0.6mm.

2. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, The blade has a rake angle of 11°-13°, a clearance angle of 7°-9°, and a transverse blade width of 1.8-2.2 mm.

3. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, The engraving tool adopts a four-blade symmetrical structure with a blade tip radius of R0.04-0.06mm and is coated with a TiAlN nano-coating.

4. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, The engraving depth is 0.3-0.5mm per engraving operation.

5. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, It also includes using dynamic toolpath planning to reduce idle tool travel, using adaptive cutting force control algorithms to optimize machining stability, and monitoring machining vibration in real time and adjusting the feed rate.

6. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, The tool holder of the tool has an internal cooling structure, with a coolant pressure of 3-5 MPa and a flow rate of 8-12 L / min.

7. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, The thickness of the TiAlN nanocoating is 3-5 μm, and the microhardness is HV2800-3200.

8. The processing method of a four-sided ribbed disc spiral roller ring according to claim 1, characterized in that, Before machining, tool runout is checked, and the radial runout should not exceed 0.02mm.