Tapping machine

Abstract

To provide a tapping machine which can remove burrs from tapped nuts in parallel with tapping into a nut blank, and can perform a tapping work at an inexpensive price and easily.SOLUTION: A tapping machine 1 is provided with a brush 7 which is a burr removal member for removing burrs of tapped nuts N, N at a portion adjacent to a tap part 2a on a base end side of a bent tap 2 rotatably held. The brush 7 is a so-called wire brush, and in a shank 7a thereof firmly attached to the bent tap 2, many brush hairs 7b, 7b having a same length are planted so as to face radially.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tapping machine for tapping (tapping) a nut material by pressing it against the tap portion of a bent tap with a retaining member. [Background technology]

[0002] As a tapping machine for cutting (tapping) a screw groove into the central through-hole of a nut material (such as a flat hexagonal column) for forming a nut, there is known one that includes a bent tap formed in the shape of a long rod and held rotatably around a horizontal axis, a holding member that is provided so as to be able to move back and forth in order to press the nut material against the tap portion (thread groove forming portion) at the base end of the bent tap, and a drive device for moving the holding member back and forth, as disclosed in Patent Document 1.

[0003] In this tapping machine, the nut materials stacked vertically are guided in sequence to the front of the holding member, and are pressed by the holding member against the tap portion at the base end of the rotating bent tap to form a thread groove.Then, as the bent tap rotates, the nut materials are pushed forward and released to the outside from the bent portion at the tip of the bent tap. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-262433 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the conventional tapping machine described above, unexpected burrs (protrusions, burrs, etc.) can form on the tapped nuts. To resolve this issue, all tapped nuts must be visually inspected to remove any burrs, or the nuts must be re-tapped, which is time-consuming and costly.

[0006] The object of the present invention is to provide a tapping machine that solves the problems of the conventional tapping machines described above, that can remove burrs from the tapped nut in parallel with tapping the nut material, and that can make tapping work inexpensive and easy. [Means for solving the problem]

[0007] The invention described in claim 1 is a long rod-shaped device that is rotatable around a horizontal axis. A tap was formed at the base end and a bent was formed at the tip. A tapping machine comprising: a bent tap; a guide member provided with a cylindrical portion for holding the tap portion at the base end of the bent tap in an inserted state; a storage section for sequentially guiding nut materials stored in a stacked state to a position adjacent to the tap portion of the bent tap; and a pressing member for pressing the nut materials guided by the storage section against the tap portion of the bent tap by moving back and forth by a drive device, wherein the bent tap is provided with a burr removing member for removing burrs from the tapped nut. The vent tap is attached to a brush, and a small-diameter portion that is smaller than the other constant-diameter portions is formed at the tip side portion adjacent to the tap portion of the vent tap. The burr removal member is a brush formed by implanting many bristles of the same length on a cylindrical shaft portion so that they face in radial directions, and the shaft portion is fitted into the small-diameter portion of the vent portion. It is characterized by the following. [Effects of the Invention]

[0010] The tapping machine described in claim 1 is provided with a burr removal member for removing burrs from nuts tapped onto a bent tap, so that burrs can be removed from the tapped nut simultaneously (in parallel) with tapping onto the nut material, making the tapping operation inexpensive and easy.

[0011] Claim 1The tapping machine described in the above has a burr removal member that is a brush with many bristles of the same length attached to a shaft portion fixed to the shank portion of the bent tap so that they face radially, so that it can very efficiently remove burrs from tapped nuts.

[0012] Claim 1 In the tapping machine described in the above, the burr removal member is provided adjacent to the tap portion on the base end side of the bent tap, so that soft burrs can be efficiently removed from the nut immediately after tapping. [Brief explanation of the drawings]

[0013] [Figure 1] 1A and 1B are explanatory diagrams (side views) showing a tapping machine (FIG. 1A shows the entire tapping machine, and FIG. 1B shows a bent tap). [Figure 2] 1 is an explanatory diagram showing a brush attachment portion at the tip of the bent tap (an enlarged side view of portion A in FIG. 1). [Figure 3] 4 is an explanatory diagram showing a brush attachment portion at the tip of the bent tap (a cross-sectional view taken along line BB in FIG. 2). FIG. [Figure 4] FIG. 10 is an explanatory diagram showing a modified example of a tapping machine (a side view of a bent tap with a brush attached). DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tapping machine according to the present invention will be described in detail below with reference to the drawings.

[0015] <Structure of a tapping machine> FIG. 1(a) shows a simplified view of a tapping machine. The tapping machine 1 is composed of a bent tap 2, a guide member 3, a storage section 4, a restraining member 5, a guide member 6, a brush 7 that functions as a burr removal member, and the like.

[0016] FIG. 1(b) shows a bent tap 2. The bent tap 2 is formed into a long rod-like metal rod. At its base end, a tap portion 2a is formed for forming a thread in a nut material N, N·· (a nut before threading, a flat hexagonal columnar body with a cylindrical through-hole drilled in the center). At its tip, a bent portion 2b is provided that can be bent into an arc. The bent portion 2b has a smaller diameter than the minimum diameter portion of the tap portion 2a (the portion that forms the apex of the thread on the inner wall surface of the nut material N). A brush 7, which is a burr removal member, is attached to a portion of the bent tap 2 adjacent to the tap portion 2a on the base end (the portion adjacent to the tip) for removing burrs (protrusions, burrs, etc.) formed on the inner surface of the nut material N, N·· when threads are cut into the nut material N, N·· (i.e., when tapping) (the structure of the brush 7 will be described later). The bent tap 2 is supported by a support member (not shown) and is rotatable around a horizontal axis along the longitudinal direction by a rotary drive device (not shown).

[0017] The guide member 3 has a cylindrical portion 3a at its front end, which has a hexagonal column-shaped cavity through which nut materials N, N, etc. can be inserted. The tap portion 2a at the base end of the bent tap 2 is held within the cylindrical portion 3a, positioned at the axial center of the cylindrical portion 3a. An insertion hole 3b is formed at the rear end of the guide member 3, axially aligned with the cylindrical portion 3a. A long, cylindrical restraining member 5 is inserted within the insertion hole 3b so as to be movable back and forth by a translation drive device (not shown). A cylindrical guide member 6 having a hexagonal column-shaped cavity similar to the cylindrical portion 3a is provided at the tip end of the guide member 3.

[0018] On the other hand, the storage section 4 is formed in the shape of a flat, hollow rectangular pillar, and is installed facing vertically upward at the top of approximately the center of the guide member 3 (rear and adjacent to the tap portion 2a of the bent tap 2 inside the guide member 3). The interior of the storage section 4 is in communication with the interior of the cylindrical section 3a of the guide member 3. The storage section 4 can store a plurality of nut materials N, N... in a stacked state, and can sequentially guide these nut materials N, N... to a position inside the guide member 3 adjacent to the tap portion 2a of the bent tap 2.

[0019] <Structure of deburring component> FIG. 3 shows the attachment of the brush 7, a burr removal member, to the vent tap 2. The brush 7 is a so-called wire brush, with numerous bristles (brush bristles) 7b, 7b... attached to a cylindrical shaft 7a, oriented radially from the center of the shaft 7a. The attachment portion of the brush 7 on the vent tap 2 is formed with a smaller diameter (small diameter portion 2α) than the remaining portion (constant diameter portion 2β) of the vent portion 2b. The shaft 7a of the brush 7 is fitted and attached to the small diameter portion 2α. The shaft 7a of the brush 7 has approximately the same diameter as the constant diameter portion 2β of the vent portion 2b of the vent tap 2. The tips of the bristles of the brush 7 protrude slightly (by approximately 1 to 10% of the diameter of the maximum diameter portion of the tap portion 2a) beyond the maximum diameter portion of the tap portion 2a of the vent tap 2 (the portion that forms the deepest point of the thread groove on the inner wall surface of the nut blank N) (see FIG. 2).

[0020] <How the tapping machine works> When the tapping machine 1 described above taps the nut materials N, N..., the nut materials N, N... stored in a stacked state in the storage section 4 are sequentially guided rearward adjacent to the tap portion 2a of the bent tap 2 inside the guide member 3. As the nut material N is guided in this manner, the retaining member 5, which had retracted rearward, moves forward by a translation drive device (not shown) and presses the guided nut material N against the base end of the tap portion 2a of the bent tap 2, which is being rotated by a rotation drive device (not shown). As the nut material N is pressed against the tap portion 2b of the bent tap 2 in this manner, a thread groove is formed on the circumferential surface of the through hole of the nut material N (i.e., the nut material N is tapped).

[0021] Furthermore, as described above, the nuts N, N... on which the thread grooves are formed move from the base end side to the tip end side inside the cylindrical portion 3a of the guide member 3 and the inside of the guide member 6 as the vent tap 2 rotates, and then come off the bent portion 2b at the tip of the vent tap 2 and are collected. Then, as the tapped nuts N, N... move along the tip of the vent tap 2, the tapped surface (inner peripheral surface) of each nut N, N... is brushed off by the brush 7, which is a burr removal member. At this time, even if burrs (protrusions, burrs, etc.) are formed on the tapped surface or on the front and rear of the tapped surface, these burrs are also scraped off by the brush 7.

[0022] <Effects of the tapping machine> As described above, the tapping machine 1 has a brush 7, which is a burr removal member for removing burrs from the tapped nuts N, N··, attached to the bent tap 2, so that burrs can be removed from the tapped nuts N, N·· at the same time (in parallel) as tapping the nut material N, N··, making the tapping work inexpensive and easy.

[0023] In addition, the tapping machine 1 has a brush 7 in which the burr removal member is fixed to the bent tap 2 and has numerous bristles 7b, 7b... of the same length attached to a shaft 7a that faces radially, so that burrs can be removed very efficiently from the tapped nuts N, N...

[0024] Furthermore, the tapping machine 1 has a brush 7, which is a burr removal member, located adjacent to the tap portion 2a on the base end side of the bent tap 2, so that soft burrs can be efficiently removed from the nuts N, N... immediately after tapping.

[0025] <Example of changing the tapping machine> The tapping machine according to the present invention is not limited to the above-described embodiment, and the materials, shapes, structures, and other configurations of the bent tap, guide member, holding member, storage section, and burr removal member (brush) can be appropriately changed as needed within the scope of the present invention.

[0026] For example, the tapping machine according to the present invention is not limited to a tap in which the burr removal member is a brush as in the above embodiment, but may be one in which the burr removal member is formed by winding bulky steel wool around a bent tap, etc. Furthermore, when the burr removal member is a brush, the brush is not limited to one made of metal as in the above embodiment, but may be one made of synthetic resin with high rigidity, etc.

[0027] Furthermore, the tapping machine according to the present invention is not limited to the above embodiment in which the burr removal member is provided adjacent to the tap portion on the base end side of the bent tap (the portion adjacent to the tip side), but may be provided near the tip of the bent portion of the bent tap, as shown in Figure 4. When such a configuration is adopted, the tapping machine can easily collect the burrs removed from the tapped nut. [Industrial Applicability]

[0028] The tapping machine according to the present invention has the excellent effects as described above, and can therefore be suitably used as a machine for tapping nut materials. [Explanation of symbols]

[0029] 1. Tapping machine 2. Vent tap 2a Tap part 3. Guide member 3a Cylindrical part 3b...Insertion hole 4. Storage area 5. Retaining member 6. Guide member 7. Brush (burr removal part) 7a·Shaft part 7b...hair

Claims

[Claim 1] A tapping machine comprising: a bent tap, which is a long rod-like member held rotatably around a horizontal axis and has a tap portion formed at its base end and a bent portion formed at its tip; a guide member having a cylindrical portion for holding the tap portion at the base end of the bent tap in an inserted state; a storage section for sequentially guiding nut materials stored in a stacked state to a position adjacent to the tap portion of the bent tap; and a pressing member which moves back and forth by a drive device to press the nut materials guided by the storage section against the tap portion of the bent tap, A burr removal member is attached to the bent tap to remove burrs from the tapped nut, A small diameter portion having a diameter smaller than that of the other constant diameter portions is formed at a tip side portion adjacent to the tap portion of the bent tap, A tapping machine characterized in that the burr removal member is a brush made of a cylindrical shaft with many bristles of the same length planted in a radial direction, and the shaft is fitted into the small diameter part of the vent section.

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