Stator sleeve broach and manufacturing method thereof

Abstract

The present invention discloses a stator sleeve broach and a manufacturing method thereof. The stator sleeve broach comprises a tool body, which comprises a cutting tooth portion and a calibration tooth portion. Two cutting teeth are selected in the middle and / or rear portion, the tooth spacing between the two selected cutting teeth is increased, and a notch is machined on the tooth spacing between the two selected cutting teeth to form an adjustment groove. The tooth spacing between the two selected cutting teeth is larger than the tooth spacing of the cutting teeth in the remaining portion. The tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the vibration of the grinding tool. The cutting teeth with a tooth width greater than 5 mm in the cutting tooth portion are ground with a broken edge groove, and the broken edge grooves located at adjacent cutting teeth are staggered with each other. The addition of the adjustment groove in the present invention can reduce the vibration of the tool during the machining process. The increased tooth spacing provides sufficient spatial position for the grinding support of the machining tool. By providing the broken edge groove, the iron chips generated by the cutting are narrowed and separated, which is more conducive to chip rolling.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting tools, in particular to a stator sleeve broach and a manufacturing method thereof. Background Art

[0002] In the existing processing of the stator sleeve broach, due to the small tooth spacing, the processing tool does not have enough support space, so the processing tool is prone to jumping during the processing, resulting in unstable processing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a stator sleeve broach and a manufacturing method thereof, which can reduce the vibration of the grinding tool.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: in a first aspect, a stator sleeve broach comprises a cutter body, wherein the cutter body comprises a cutting tooth portion and a calibration tooth portion, wherein the cutting tooth portion comprises a plurality of cutting teeth, two cutting teeth in the middle and / or rear portion are selected, the tooth spacing between the two selected cutting teeth is increased, and a notch is machined on the tooth spacing between the two selected cutting teeth to form an adjustment groove, wherein the tooth spacing between the two selected cutting teeth is greater than the tooth spacing of the cutting teeth in the remaining portion.

[0005] Preferably, the tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the vibration of the grinding tool.

[0006] Preferably, the cutting teeth with a tooth width greater than 5 mm in the cutting tooth portion are ground with edge-breaking grooves, and the edge-breaking grooves located on adjacent cutting teeth are staggered to narrow the iron chips formed during the cutting tooth processing.

[0007] In a second aspect, a method for manufacturing a stator sleeve broach comprises the following steps:

[0008] (1) selecting two cutting teeth in the middle and / or rear portion of the cutting tooth portion of the cutter body, increasing the tooth spacing between the two selected cutting teeth, and machining a notch on the tooth spacing between the two selected cutting teeth to form an adjustment groove, wherein the tooth spacing between the two selected cutting teeth is greater than the tooth spacing of the cutting teeth in the remaining portion; and the tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the vibration of the grinding tool;

[0009] (2) The radial runout tolerance of each outer surface of the broach is 0.015mm. The radial runout of the calibration tooth and the two adjacent cutting teeth is not greater than the diameter tolerance and the runout is in the same direction. Except for the calibration tooth, the cutting teeth with a tooth width greater than 5mm in the cutting tooth part are ground with a cutting edge groove. The cutting edge grooves located on adjacent cutting teeth are staggered to narrow the iron chips formed during the cutting tooth processing.

[0010] There is no order of precedence for steps (1) and (2).

[0011] Preferably, in the method for manufacturing the stator sleeve broach, corresponding measuring rods are selected to process the cutting teeth of the cutting tooth portion and the calibration teeth of the calibration tooth portion.

[0012] Preferably, in the method for manufacturing the stator sleeve broach, the tolerance of the asymmetry and helicity of the key teeth to the center is 0.01 mm.

[0013] Preferably, in the method for manufacturing the stator sleeve broach, the tolerance of the cumulative error of the key teeth is 0.02 mm.

[0014] The present invention has the following beneficial effects: selecting two cutting teeth in the middle and / or rear portion of the cutting teeth of the cutter body, increasing the tooth spacing between the two selected cutting teeth, and machining a notch in the tooth spacing between the two selected cutting teeth to form an adjustment groove. The addition of the adjustment groove can reduce tool runout during machining. The increased tooth spacing provides sufficient space for the grinding support of the machining tool. The provision of the edge-breaking groove narrows and separates the chips generated by cutting, facilitating chip curling. DETAILED DESCRIPTION

[0015] In a first aspect, a stator sleeve broach comprises a tool body, the tool body comprising a cutting tooth portion and a calibration tooth portion, the cutting tooth portion comprising a plurality of cutting teeth, two cutting teeth being selected from the middle and / or rear portion, the tooth spacing between the selected two cutting teeth being increased, and a notch being machined in the tooth spacing between the selected two cutting teeth to form an adjustment groove, wherein the tooth spacing between the selected two cutting teeth is greater than the tooth spacing of the cutting teeth in the remaining portion. Specifically, in an optional implementation of this embodiment, the tooth spacing between teeth 42 / 43 of the cutting tooth portion is increased by 4 mm, and the tooth spacing between teeth 87 / 88 of the cutting tooth portion is increased by 4 mm, and two notches are machined at this increased tooth spacing to form two adjustment grooves. The addition of the adjustment groove can reduce tool vibration during machining. The increased tooth spacing provides sufficient space for the grinding support of the machining tool.

[0016] Preferably, the tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the vibration of the grinding tool.

[0017] Preferably, the cutting teeth with a tooth width greater than 5 mm in the cutting tooth portion are ground with edge-breaking grooves, and the edge-breaking grooves located on adjacent cutting teeth are staggered to narrow the iron chips formed during the cutting tooth processing. By providing the edge-breaking grooves, the iron chips generated by cutting are narrowed and separated, which is more conducive to chip rolling. For example, if the cutting edge width of the cutting tooth is 7 mm, one or two small grooves are ground on the cutting edge. The grooves can be household or square grooves, which can divide the 7 mm iron chips into two or three sections, making it easier for the iron chips to narrow and enter the chip groove, which is used to accommodate the iron chips.

[0018] In a second aspect, a method for manufacturing a stator sleeve broach comprises the following steps:

[0019] (1) Two cutting teeth are selected from the middle and / or rear parts of the cutting tooth portion of the cutter body, the tooth spacing between the two selected cutting teeth is increased, and a notch is machined on the tooth spacing between the two selected cutting teeth to form an adjustment groove. The tooth spacing between the two selected cutting teeth is larger than the tooth spacing of the cutting teeth in the remaining parts; the tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the vibration of the grinding tool; specifically, in an optional implementation of this embodiment, the tooth spacing between the 42 / 43 teeth of the cutting tooth portion is increased by 4 mm, and the tooth spacing between the 87 / 88 teeth of the cutting tooth portion is increased by 4 mm, and two notches are machined at the increased tooth spacing to form two adjustment grooves. Adding the adjustment groove can reduce the vibration of the tool during processing. The increased tooth spacing allows the grinding support of the processing tool to have sufficient space.

[0020] (2) In the cutting tooth part, the cutting teeth with a tooth width greater than 5mm are ground with a cutting edge groove, and the cutting edge grooves located on adjacent cutting teeth are staggered to narrow the iron chips formed during the cutting tooth processing. By setting the cutting edge groove, the iron chips generated by cutting are narrowed and separated, which is more conducive to chip rolling. For example, if the cutting edge width of the cutting tooth is 7mm, one or two small grooves are ground on the cutting edge. The grooves can be household or square grooves, which can divide the 7mm iron chips into two or three sections, making the iron chips narrower and easier to enter the chip groove, which is used to accommodate the iron chips.

[0021] There is no order of precedence for steps (1) and (2).

[0022] Preferably, in the method for manufacturing the stator sleeve broach, corresponding measuring rods are selected to process the cutting teeth of the cutting tooth portion and the calibration teeth of the calibration tooth portion.

[0023] Preferably, in the manufacturing method of the stator sleeve broach, the radial runout tolerance of each outer cylindrical surface of the broach is 0.015mm, the radial runout of the calibration tooth and the two adjacent cutting teeth is not greater than the diameter tolerance, and the runout is in the same direction; except for the calibration tooth, the cutting teeth with a tooth width greater than 5mm in the cutting tooth part are ground with a broken edge groove, and the broken edge grooves located on adjacent cutting teeth are staggered with each other. The radial runout tolerance of the stator sleeve broach manufactured in accordance with the above requirements is even smaller.

[0024] Preferably, in the method for manufacturing the stator sleeve broach, the tolerance of the asymmetry and helicity of the key teeth to the center is 0.01 mm. The asymmetry and helicity of the key teeth of the stator sleeve broach manufactured according to the above requirements are small and meet the precision requirements.

[0025] Preferably, in the method for manufacturing the stator sleeve broach, the tolerance of the cumulative error of the key teeth in equal parts is 0.02 mm. The cumulative error of the key teeth in equal parts of the stator sleeve broach manufactured according to the above requirements meets the accuracy requirements.

[0026] The above description only describes specific embodiments of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can make modifications or variations to the specific embodiments described above without departing from the essence and scope of the invention.

Claims

1. A stator sleeve broach, comprising a tool body, characterized in that: The blade body includes a cutting tooth part and a calibration tooth part, the cutting tooth part includes multiple cutting teeth, two cutting teeth in the middle and / or rear part are selected, the tooth spacing between the two selected cutting teeth is increased, and a notch is processed on the tooth spacing between the two selected cutting teeth to form an adjustment groove, and the tooth spacing between the two selected cutting teeth is greater than the tooth spacing of the cutting teeth in the remaining parts.

2. The stator sleeve broach according to claim 1, characterized in that: The tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the runout of the grinding tool.

3. The stator sleeve broach according to claim 1, characterized in that: The cutting teeth with a tooth width greater than 5 mm in the cutting tooth part are ground with edge-breaking grooves, and the edge-breaking grooves located on adjacent cutting teeth are staggered to narrow the iron chips formed during the cutting tooth processing.

4. A method for manufacturing a stator sleeve broach, characterized in that: The steps are as follows: (1) Selecting two cutting teeth in the middle and / or rear portion of the cutting tooth portion of the cutter body, increasing the tooth spacing between the two selected cutting teeth, and machining a notch on the tooth spacing between the two selected cutting teeth to form an adjustment groove, wherein the tooth spacing between the two selected cutting teeth is greater than the tooth spacing of the cutting teeth in the remaining portion; the tooth spacing between the two selected cutting teeth leaves a margin for the entry of the grinding tool to reduce the runout of the grinding tool; (2) The radial runout tolerance of each outer surface of the broach is 0.015mm. The radial runout of the calibration tooth and the two adjacent cutting teeth is not greater than the diameter tolerance and the runout is in the same direction. Except for the calibration tooth, the cutting teeth with a tooth width greater than 5mm in the cutting tooth part are ground with a cutting edge groove. The cutting edge grooves located on adjacent cutting teeth are staggered to make the iron chips formed during the cutting tooth processing narrower. There is no order of precedence for steps (1) and (2).

5. The method for manufacturing a stator sleeve broach according to claim 4, characterized in that: Select corresponding measuring rods to process the cutting teeth of the cutting tooth part and the calibration teeth of the calibration tooth part.

6. The method for manufacturing a stator sleeve broach according to claim 4, characterized in that: The tolerance of the asymmetry and helicity of the key teeth to the center is 0.01mm.

7. The method for manufacturing a stator sleeve broach according to claim 4, characterized in that: The tolerance of the cumulative error of the key teeth is 0.02mm.