Internal thread tapping and diameter expanding device

Abstract

The utility model discloses an internal thread tapping and diameter expanding device which comprises a screw tap and a workpiece fixing mechanism, the screw tap comprises a screw tap body, the head of the screw tap body is sequentially provided with a milling cutter and screw tap teeth, the milling cutter is located on the outer side of one end of the screw tap body, the milling cutter is provided with four evenly-distributed cutting edges, and chip grooves are formed between the adjacent cutting edges. The chip grooves penetrate through the screw tap teeth; the workpiece fixing mechanism comprises a clamp body, a positioning block is installed above the clamp body, positioning pins are arranged on the two sides, in the length direction, of the positioning block in a staggered mode, and the positioning pins are inserted into the clamp body in the vertical direction. According to the internal thread tapping and diameter expanding device, the screw tap can have the functions of tapping and machining the diameter of an inner hole, the service life of the screw tap is prolonged, and a workpiece can be conveniently, rapidly and efficiently clamped.

Description

TECHNICAL FIELD

[0001] The utility model relates to a female thread tapping and reaming device and belongs to the threaded machining technical field. BACKGROUND

[0002] Mechanical three-way tees are divided into groove mechanical three-way tees and threaded mechanical three-way tees, which can be used to directly connect branch pipes on steel pipes and have more applications in the installation of fire-fighting pipelines and spray pipelines.

[0003] The existing threaded mechanical three-way tee needs to use a tapping machine in the tapping machining process, the tapping machine is provided with a tap and a fixing device, the fixing device clamps the workpiece, and the tap taps the clamped workpiece.

[0004] However, the tap in the prior art only has the function of tapping, the function is relatively single, and the service life is short. The fixing device in the prior art can only clamp a single workpiece, and the clamping process is relatively cumbersome, which affects the machining efficiency.

[0005] In summary, the prior art has obvious inconvenience and defects in actual use, and therefore needs to be improved. INVENTION CONTENTS

[0006] The utility model discloses a female thread tapping and reaming device, can make the tap have the function of tapping and machining inner hole diameter, prolong the service life of tap, still can realize the convenient and efficient clamping of workpiece to the shortage in prior art.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A female thread tapping and reaming device, including tap and workpiece fixing mechanism, tap includes tap main part, the head of tap main part is equipped with milling cutter and tap tooth in proper order, milling cutter is located one end of tap main part outside, milling cutter is equipped with four even distribution's cutting edges, is equipped with the chip flute between adjacent cutting edges, chip flute is set up through tap tooth.

[0009] Further, the tap tooth is conical as a whole, and the small-diameter section of the conical structure is arranged close to the milling cutter.

[0010] Further, the workpiece fixing mechanism includes a clamping body, and a positioning block is installed above the clamping body.

[0011] Further, a positioning key is arranged between the positioning block and the clamping body, and the positioning key is distributed at both ends of the positioning block along the length direction.

[0012] Further, the positioning block and the clamping body are fixedly connected through screws, and the positioning key and the clamping body are fixedly connected through screws.

[0013] Further, two replaceable transition sleeves are installed inside the positioning block.

[0014] Further, the bottom of the replaceable transition sleeves are each installed with a gasket.

[0015] Further, the positioning block has staggered positioning pins on both sides along the length direction.

[0016] Further, the positioning pins are inserted into the clamping body along the vertical direction.

[0017] The above technical scheme has the following advantages compared with the prior art:

[0018] The tap after the four-blade milling cutter is rotated and milled under the action of the tapping machine, so that the tapping allowance can be reduced, and the service life of the tap is prolonged.

[0019] The four-blade milling cutter can mill and cut the passageway part inside the tapping part of the workpiece, increase the hole diameter size inside the thread, increase the flow of the fluid medium, and increase the surface finish of the hole diameter, and reduce the fluid resistance.

[0020] The workpiece fixing mechanism can simultaneously realize positioning and clamping of two mechanical tees, and the positioning and clamping are realized by the staggered positioning pins arranged around the mechanical tee.

[0021] The utility model will be described in detail below in combination with the drawings and examples. DRAWINGS

[0022] Figure 1 is the structure perspective view of the tap in the utility model;

[0023] Figure 2 is the structure front view of the tap in the utility model;

[0024] Figure 3 is the structure front view of the workpiece fixing mechanism in the utility model;

[0025] Figure 4 is the structure top view of the workpiece fixing mechanism in the utility model;

[0026] Figure 5 is Figure 4 the cross-sectional view of A-A in the utility model;

[0027] Figure 6 is the schematic view of the mechanical tee after clamping.

[0028] In the figure, 1 - tap body, 2 - milling cutter, 3 - tap tooth, 4 - chip flute, 5 - replaceable transition sleeve, 6 - positioning block, 7 - pad sleeve, 8 - clamping body, 9 - positioning pin, 10 - positioning key, 11 - mechanical tee. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific embodiments of the present application will be described with reference to the accompanying drawings.

[0030] As Figures 1-6 The utility model provides a female thread tapping and reaming device, including tap and workpiece fixing mechanism.

[0031] The tap includes a tap body 1, and a milling cutter 2 and a tap tooth 3 are sequentially arranged on the head of the tap body 1, the milling cutter 2 is located on the outer side of one end of the tap body 1, the milling cutter 2 is provided with four evenly distributed cutting edges, a chip flute 4 is arranged between adjacent cutting edges, and the chip flute 4 penetrates through the tap tooth 3.

[0032] The tap tooth 3 is conical in shape, the tap tooth 3 is a 3 / 4 taper thread, and the small diameter section of the conical structure is arranged close to the milling cutter 2.

[0033] The tail of the tap body 1 is in the shape of a square tenon, so that clamping and fixing are facilitated.

[0034] The machining hole diameter of the four-blade milling cutter is slightly lower than the inner diameter of the threaded tip position of the workpiece after tapping, the four-blade milling cutter can be rotated and milled under the action of a tapping machine, the tapping allowance can be reduced, and the service life of the tap is prolonged.

[0035] The tap in the utility model plays the roles of tapping and machining the hole diameter of the inner hole during the tapping process.

[0036] The four-blade milling cutter can machine and mill the reaming position inside the tapping position of the workpiece, increase the hole diameter size inside the thread, increase the flow of the fluid medium, and increase the surface finish of the inner hole diameter, thereby reducing the fluid resistance.

[0037] The workpiece fixing mechanism is used for clamping the mechanical tee 11.

[0038] The workpiece fixing mechanism includes a clamping body 8, a positioning block 6 is mounted above the clamping body 8, a positioning key 10 is arranged between the positioning block 6 and the clamping body 8, the number of the positioning keys 10 is two, and the positioning keys 10 are distributed at the two ends of the positioning block 6 along the length direction.

[0039] The positioning block 6 and the clamping body 8 are fixedly connected through screws, and the positioning key 10 and the clamping body 8 are fixedly connected through screws.

[0040] Two replaceable transition sleeves 5 are arranged in the positioning block 6, and the bottom of each replaceable transition sleeve 5 is provided with a gasket 7, and the replaceable transition sleeve 5 is in abutment with the inner wall of the mechanical tee joint 11.

[0041] The positioning block 6 is provided with staggered positioning pins 9 on both sides in the length direction, and the positioning pins 9 are inserted into the clamping body 8 in the vertical direction.

[0042] The workpiece fixing mechanism can simultaneously realize positioning and clamping of two mechanical tee joints 11.

[0043] The tap and the workpiece fixing mechanism are used in combination, the mechanical tee joint 11 to be tapped is positioned and clamped by the workpiece fixing mechanism, and then the tap is used for tapping the port of the mechanical tee joint 11.

[0044] The above is an example of the best implementation mode of the utility model, wherein the parts not described in detail are all the common knowledge of the ordinary skilled in the art. The protection scope of the utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A tap reamer for tapping an internal thread, characterized in that: The tap and the workpiece fixing mechanism, the tap comprises a tap body (1), a milling cutter (2) and a tap tooth (3) are sequentially arranged on the head of the tap body (1), the milling cutter (2) is located outside one end of the tap body (1), the milling cutter (2) is provided with four evenly distributed cutting edges, a chip groove (4) is arranged between adjacent cutting edges, and the chip groove (4) penetrates through the tap tooth (3); The tap tooth (3) is conical as a whole, and the small-diameter section of the conical structure is arranged close to the milling cutter (2); The workpiece fixing mechanism comprises a clamping body (8), a positioning block (6) is arranged above the clamping body (8); a positioning key (10) is arranged between the positioning block (6) and the clamping body (8), the positioning key (10) is distributed at two ends of the positioning block (6) along the length direction; the positioning block (6) and the clamping body (8) are fixedly connected through screws, and the positioning key (10) and the clamping body (8) are fixedly connected through screws.

2. A tap and pilot device for tapping an internal thread, as claimed in claim 1, wherein: Two replaceable transition sleeves (5) are arranged in the positioning block (6).

3. A tap and pilot device for tapping an internal thread, as claimed in claim 2, wherein: The bottom of each replaceable transition sleeve (5) is provided with a pad sleeve (7).

4. A tap and pilot device for tapping an internal thread, as claimed in claim 1, wherein: Interlaced positioning pins (9) are arranged on the two sides of the positioning block (6) along the length direction.

5. A tap and pilot device for tapping an internal thread, as claimed in claim 4, wherein: The positioning pins (9) are inserted into the clamping body (8) along the vertical direction.

Images