Screw tap for sheet metal working

Abstract

The utility model relates to the field of sheet metal working tools, and discloses a screw tap for sheet metal working, which comprises a screw tap body, and a polishing head is fixedly arranged on the screw tap body. The screw tap body comprises a nose cone, a second cone and a connecting handle; the nose cone, the second cone and the connecting handle are integrally formed; the cone head of the nose cone is coaxially and fixedly connected with the supporting rod, and the grinding head is fixedly installed at the end, away from the nose cone, of the supporting rod. According to the utility model, the grinding head is fixedly arranged on the screw tap body, so that the grinding head can clean burrs on the inner wall of a hole after tapping and in a tool retracting process, a special drill bit does not need to be additionally used, and the machining efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of sheet metal processing tools, and particularly to a tap for sheet metal processing. Background Art

[0002] A tap is a tool for processing internal threads, with grooves axially formed, also called a screw tap. It has a simple structure and is convenient to use. It can be operated manually or on a machine tool, and is widely used in production.

[0003] The guiding tap with the publication number of CN213257560U includes a tap body and a guiding column. The maximum dimension of the guiding column along the radial direction of the tap body is smaller than the maximum radial dimension of the tap body. The guiding column and the tap body are coaxially arranged. The guiding column includes a guiding part and a connecting part. The connecting part connects the guiding part and the tap body. The ratio of the length of the guiding part along the axial direction of the tap body to the length of the connecting part along the axial direction of the tap body is between 0.3 and 0.7.

[0004] Based on the above technical features, the problem is that in the prior art, after tapping, burrs will appear on the inner wall of the hole. To remove the burrs, a special drill bit is needed to remove the burrs in the hole, resulting in low processing efficiency.

[0005] Therefore, it is necessary to solve the above problems with a tap for sheet metal processing. Summary of the Invention

[0006] The purpose of the utility model is to provide a tap for sheet metal processing to solve the problems put forward in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: A tap for sheet metal processing includes a tap body, and a grinding head is fixedly arranged on the tap body; the tap body includes a first tap, a second tap and a connecting handle; the first tap, the second tap and the connecting handle are integrally formed; a support rod is coaxially and fixedly connected to the conical head of the first tap, and the grinding head is fixedly installed at the end of the support rod away from the first tap.

[0008] Preferably, a plurality of chip flutes are axially formed on the tap body, and the plurality of chip flutes are evenly distributed on the tap body along the circumferential direction of the tap body.

[0009] Preferably, the grinding head includes a disc and a plurality of polishing brushes; the disc is coaxially and fixedly connected to the support rod; the plurality of polishing brushes are evenly distributed on the circumferential curved surface of the disc along the circumferential direction of the disc, and are fixedly connected to the disc at the same time.

[0010] Preferably, the profile of each polishing brush is in the shape of a rectangular block.

[0011] Preferably, the end of the connecting handle away from the second tap is in the shape of a rectangular strip.

[0012] Technical effects and advantages of the present utility model: A grinding head is fixedly arranged on the tap body. After tapping is completed and during the tool withdrawal process, the grinding head can clean the burrs on the inner wall of the hole, eliminating the need to additionally use a special drill bit, and thus achieving high processing efficiency. Description of the Drawings

[0013] Figure 1 It is a three-dimensional schematic diagram of the present utility model;

[0014] Figure 2 It is a partial schematic diagram of the present utility model.

[0015] In the figure: 1, connecting handle; 2, chip fluting; 3, second tap; 4, first tap; 5, support rod; 6, grinding head. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0017] The present utility model provides a tap for sheet metal processing as Figures 1 to 2 shown, including a tap body. The tap body includes a connecting handle 1, a second tap 3, and a first tap 4. Among them, the connecting handle 1, the second tap 3, and the first tap 4 are integrally formed.

[0018] A support rod 5 is coaxially welded to the end of the first tap 4 away from the second tap 3, that is, at the tap head. A disc is coaxially welded to the end of the support rod 5 away from the first tap 4. A plurality of rectangular block-shaped polishing brushes are fixedly connected to the disc. The plurality of polishing brushes are evenly distributed along the circumference of the disc and are fixedly connected to the circumferential curved surface of the disc. The disc and the plurality of polishing brushes together form a grinding head 6.

[0019] Each polishing brush is in sliding contact with the inner wall of the hole for grinding the burrs in the hole. Three chip flutings 2 are chiseled axially on the tap body. The three chip flutings 2 are evenly distributed along the circumference of the tap body. Each chip fluting 2 passes through the tapping threads of the first tap 4 and the second tap 3.

[0020] The end of the connecting handle 1 away from the second tap 3 is in the shape of a rectangular strip, facilitating the connection of driving components such as a hand drill and a socket.

[0021] Working principle: During tapping, the grinding head 6 extends into the hole, and then the first tap 4 extends into the hole and abuts against the sheet metal part to be tapped. Subsequently, the connecting handle 1 is rotated, and this process can be driven manually or by a motor.

[0022] After that, the connecting handle 1 drives the second tap 3 to rotate, the second tap 3 drives the first tap 4 to rotate, the first tap 4 drives the support rod 5 to rotate, and the support rod 5 drives the grinding head 6 to rotate. The first tap 4 performs tapping operation first, and then the second tap 3 performs tapping operation. During this process, the chips generated by tapping slide out from the chip guide groove 2.

[0023] When retracting the tool after tapping is completed, the polishing brush of the grinding head 6 will slide and abut against the inner wall of the hole. During the rotation of the grinding head 6 when retracting the tool, the polishing brush cleans and grinds the burrs on the inner wall of the hole.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tap for sheet metal processing, comprising a tap body, characterized in that: A grinding head (6) is fixedly arranged on the tap body; the tap body includes a first tap (4), a second tap (3) and a connecting shank (1); the first tap (4), the second tap (3) and the connecting shank (1) are integrally formed; a support rod (5) is coaxially and fixedly connected to the tip of the first tap (4), and the grinding head (6) is fixedly installed at the end of the support rod (5) away from the first tap (4).

2. The tap for sheet metal processing according to claim 1, wherein: A plurality of chip flutes (2) are axially formed on the tap body, and the plurality of chip flutes (2) are evenly distributed on the tap body along the circumferential direction of the tap body.

3. The tap for sheet metal processing according to claim 1, characterized in that: The grinding head (6) includes a disc and a plurality of polishing brushes; the disc is coaxially and fixedly connected to the support rod (5); the plurality of polishing brushes are evenly distributed on the circumferential curved surface of the disc along the circumferential direction of the disc, and are fixedly connected to the disc at the same time.

4. The tap for sheet metal processing according to claim 3, wherein: The profile of each polishing brush is in the shape of a rectangular block.

5. The tap for sheet metal processing according to claim 1, characterized in that: The end of the connecting shank (1) away from the second tap (3) is in the shape of a rectangular strip.

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