Rolling equipment

Abstract

To provide a rolling processing device capable of lengthening the service life of a tool by efficiently supplying a coolant to both of the tip side and the rear side in rolling processing that involves thrust feeding.SOLUTION: A representative configuration of a rolling processing device 100 includes: a rolling tool 120 for creating a gear; a holder 110 for holding the rolling tool; a collar 130 arranged on the tip side of the rolling tool; a coolant passage 116 formed inside the folder; a first discharge port 118 formed in the holder, being in communication with the coolant passage, and opening on the rear side of the rolling tool; and a second discharge port 132 formed in the collar 130, being in communication with the coolant passage and opening on the tip side of the rolling tool.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rolling device that performs rolling while discharging a coolant. [Background technology]

[0002] Rolling is a processing method in which the shape of a tool is transferred to a workpiece (material) by applying force to the workpiece to cause plastic deformation, forming the workpiece into a desired shape. When processing gears or screws using rolling, coolant is supplied between the tool and the workpiece to cool and lubricate them.

[0003] For example, Patent Document 1 discloses a gear machining device that uses a cutting tool (skiving) rather than a rolling tool, and has a discharge hole on the center side of the end face of the machining tool that can discharge a fluid in a direction toward the tool blade. The discharge hole of this machining tool is provided so that the fluid can be discharged parallel to the rake face of the tool blade. The coolant used in cutting has the effect of preventing chips from getting caught in the cutting process, improving the machining accuracy of the workpiece, and preventing tool damage.

[0004] For example, the rolled tap with oil injection hole described in Patent Document 2 has a main injection hole 1 extending in the axial direction at the axial center, and has a secondary injection hole opening from this main injection hole to the tap cutting edge. The secondary injection hole opens at the middle position of the tap cutting edge. It is said that this can improve the tool life and work efficiency. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6427897 [Patent Document 2] Japanese Utility Model Application Publication No. 49-29136 Summary of the Invention [Problem to be solved by the invention]

[0006] In the technology described in Patent Document 1, a cutting tool is used, and the main purpose is to prevent chips from getting caught in the cutting edge of the tool, so coolant is only discharged to the tip of the tool. However, in rolling, processing is performed over the entire face width of the rolling tool. Particularly in thrust feed rolling, the first part to be hit is the tip side of the tool (tapered guide part), and the gear is finished on the rear side (finishing part). This causes a problem that if coolant is supplied in the same way as in Patent Document 1, coolant is supplied to the tip side, but there is a shortage of coolant on the rear side.

[0007] In the rolling tap described in Patent Document 2, the distribution hole is opened at the middle position of the tap blade, so it is possible to supply coolant to both the tip side and the rear side. However, when thrust feeding is performed, there is a shortage of coolant on the tip side. In addition, if the distribution hole is opened on the tap blade, there is a risk that the shape of the distribution hole will be transferred to the workpiece.

[0008] Therefore, an object of the present invention is to provide a rolling device that can efficiently supply coolant to both the leading edge and the trailing edge during rolling using thrust feed, thereby extending the life of the tool. [Means for solving the problem]

[0009] In order to solve the above problems, a typical configuration of the rolling processing device of the present invention is characterized by comprising a rolling tool for creating a gear, a holder for holding the rolling tool, a collar arranged on the tip side of the rolling tool, a coolant passage formed inside the holder, a first discharge port formed in the holder, communicating with the coolant passage and opening to the rear side of the rolling tool, and a second discharge port formed in the collar, communicating with the coolant passage and opening to the tip side of the rolling tool. Effect of the Invention

[0010] According to the present invention, coolant can be efficiently supplied to the entire tooth width from both the front and rear sides of the rolling tool, which allows the machining position to be cooled and lubricated evenly, thereby extending the tool's lifespan. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a partial cross-sectional view illustrating the configuration of the rolling device. [Diagram 2] FIG. 13 is a diagram illustrating the processing state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0013] 1A and 1B are diagrams for explaining the configuration of a rolling processing apparatus 100, with Fig. 1(a) being a partial cross-sectional view and Fig. 1(b) being a right side view of a rolling tool 120 and a workpiece 200. In this embodiment, the rolling processing apparatus 100 will be explained using an example in which internal teeth 210 are generated in an annular workpiece 200. The rolling processing apparatus 100 performs rolling by thrust feeding the rolling tool 120 as shown in Fig. 1(a) while rotating the rolling tool 120 and the workpiece 200 synchronously as shown in Fig. 1(b).

[0014] The rolling device 100 is configured by fitting a rolling tool 120 into a holder 110. A first collar 130, a second collar 140, and a bolt 150 for fastening the second collar 140 to the holder 110 are provided on the tip side of the rolling tool 120.

[0015] The holder 110 has a tapered portion 112 at its rear end, and is chucked to a processing machine (not shown). A thin-diameter shank portion 114 is formed at the tip end of the holder 110, into which a rolling tool 120 can be fitted and attached. In the following description, the side of the tapered portion 112 of the rolling processing device 100 is referred to as the "rear side," and the side of the shank portion 114 is referred to as the "tip side."

[0016] A coolant passage 116 is formed inside so as to penetrate from the tapered portion 112 to the shank portion 114. A female thread 116a for screwing a bolt 150 is formed at the tip of the coolant passage 116.

[0017] The holder 110 is formed with a first discharge port 118 that communicates with the coolant passage 116 and opens to the rear side of the rolling tool 120. The first discharge port 118 is inclined toward the tip side so as to discharge the coolant toward the teeth 122 of the rolling tool. Although only one first discharge port 118 is shown in the figure, it is preferable to arrange a plurality of first discharge ports 118 (for example, 2 to 4 ports) in the circumferential direction.

[0018] The rolling tool 120 is detachable and can be replaced with any other rolling tool depending on the processing conditions. An example of the rolling tool 120 is a rolling die for generating gears. In such a rolling tool 120, the teeth 122 are tapered so that the teeth get larger from the front end to the rear end. Therefore, the front end is sometimes called the guide portion of the taper, and the rear end is sometimes called the finishing portion.

[0019] In this embodiment, the first collar 130 and the second collar 140 are described as separate bodies, but they may be configured as one body. In this embodiment, the first collar 130 is an annular member and is fitted into the shank portion 114. The second collar 140 is also an annular member, but has the role of a washer for the bolt 150. Then, by fastening the bolt 150 to the female thread 116a of the shank portion 114, the second collar 140 urges the first collar 130 from the tip side toward the rolling tool 120, and the first collar 130 urges and fixes the rolling tool 120.

[0020] The first collar 130 is formed with a second discharge port 132 that communicates with the coolant passage 116 and opens to the tip side of the rolling tool 120. The second discharge port 132 is inclined toward the rear side so as to discharge the coolant toward the teeth 122 of the rolling tool. Although only one second discharge port 132 is shown in the figure, it is preferable to arrange a plurality of second discharge ports 132 (for example, 2 to 4 ports) in the circumferential direction.

[0021] 2 is a diagram for explaining the state of processing. When the rolling tool is in the processing start position as shown in FIG. 2(a), the coolant discharged from the first discharge port 118 on the rear side does not reach the tip side (tapered guide part) of the teeth 122 of the rolling tool. However, the coolant discharged from the second discharge port 132 on the tip side is abundantly supplied to the tip side of the teeth 122 of the rolling tool.

[0022] 2(b), when the rolling tool 120 is in the processing completion position, the coolant discharged from the second discharge port 132 on the tip side does not reach the rear side of the teeth 122 of the rolling tool. However, the coolant discharged from the first discharge port 118 on the rear side is abundantly supplied to the rear side (finishing portion) of the teeth 122 of the rolling tool.

[0023] As described above, by supplying coolant from the front and rear of the rolling tool 120, it is possible to efficiently supply coolant to the teeth 122 of the tool from the start to the end of processing. This allows for effective cooling and lubrication, and can extend the life of the tool.

[0024] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. [Industrial Applicability]

[0025] The present invention can be used as a rolling device that performs rolling while discharging coolant. [Explanation of symbols]

[0026] 100... rolling processing device, 110... holder, 112... tapered portion, 114... shank portion, 116... coolant passage, 116a... female thread, 118... first outlet, 120... rolling tool, 122... teeth, 130... first collar, 132... second outlet, 140... second collar, 150... bolt, 200... workpiece

Claims

[Claim 1] A rolling tool for creating gears; A holder for holding the rolling tool; A collar disposed on a tip side of the rolling tool; a coolant passage formed inside the holder; a first outlet port formed in the holder, communicating with the coolant passage, opening to a rear side of the rolling tool, and inclined from the rear toward the rolling tool; a second outlet port formed in the collar, communicating with the coolant passage, opening on the tip side of the rolling tool, and inclined from the front toward the rolling tool; A rolling processing device comprising:

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