CN209394110U - A kind of screw thread gang milling knife - Google Patents

Abstract

The utility model relates to tooling cost field more particularly to a kind of screw thread gang milling knives.Workpiece and pairing workpiece can not be made to carry out Screw assembly because generating machining allowance to solve the problems, such as existing screw thread gang milling knife when processing the internal screw thread not at aperture on workpiece, the utility model proposes a kind of screw thread gang milling knives, it includes knife handle and knife bar, the connecting pin of knife bar is connect with knife handle, first edge of milling cutter and multiple second edge of milling cutter are provided on knife bar, first edge of milling cutter is close to the connecting pin of knife bar, second edge of milling cutter is between the first edge of milling cutter and the free end of knife bar, and first edge of milling cutter tooth be wider than the second edge of milling cutter tooth it is wide.When using this kind of screw thread gang milling knife machining internal thread in the hole on workpiece, using the first edge of milling cutter in remaining and into knife-edge part formation the imperfect internal screw thread tooth of excision feed, and then it can guarantee that the threaded hole that processing is formed can be with pairing workpiece progress Screw assembly.

Description

A kind of screw thread gang milling knife

Technical field

The utility model relates to tooling cost field more particularly to a kind of screw thread gang milling knives.

Background technique

When using existing screw thread gang milling knife processing screw thread, usually there are following three kinds of methods:

1, circular arc tangential line plunge method: it is along one and work pieces process position phase that cutter, which switches in and out direction, in this method The circular arc direction cut.Although to cut out workpiece all very smooth for this method cutter, without trace, vibration is few, or even to hardening The processing effect of material is also fine, but the program for needing to work out when in use is complicated.

2, radial plunge method: this method is although relatively simple, but workpiece last time for cutting out of this method leaves cutter and cuts into The trace cut out.In addition, can also generate vibration in process due to being full tooth incision, further influence processing effect.

3, straight cut method: this method is along workpiece tangent line feed withdrawing.Though this method has the institute of circular arc tangential line plunge method There is advantage, still, this method is only suitable for threading.

It is used it is found that circular arc tangential line plunge method is the first choice for processing the internal screw thread of premium thread, especially high quality. In addition, using circular arc tangential line plunge method in machining internal thread on workpiece, when internal screw thread in aperture and does not have the hole of connection to lean on When nearly internal screw thread, a part can be left on the inner wall in hole and is not processed, is i.e. generation machining allowance, and then cause workpiece can not be with It matches workpiece and carries out Screw assembly.

Utility model content

To solve existing screw thread gang milling knife when processing the internal screw thread not at aperture on workpiece because generating machining allowance And the problem of workpiece and pairing workpiece can not be made to carry out Screw assembly, the utility model proposes a kind of screw thread gang milling knife, the screw threads Gang milling knife includes knife handle and knife bar, and the connecting pin of the knife bar is connect with the knife handle, and one first is provided on the knife bar Edge of milling cutter and multiple second edge of milling cutter, first edge of milling cutter is close to the connecting pin of the knife bar, second milling cutter Blade is between first edge of milling cutter and the free end of the knife bar, and the tooth of first edge of milling cutter is wider than institute The tooth for stating the second edge of milling cutter is wide.When using this kind of screw thread gang milling knife machining internal thread in the hole on workpiece, using the One edge of milling cutter can guarantee the spiral shell that processing is formed in remaining and into knife-edge part formation the imperfect internal screw thread tooth of excision feed Pit can carry out Screw assembly with pairing workpiece.

Preferably, the tooth width of first edge of milling cutter is wide 2-3 times of tooth of second edge of milling cutter.In this way, can Guarantee the first edge of milling cutter can once resecting feed it is remaining and into the imperfect internal screw thread tooth that knife-edge part is formed, can both guarantee Processing quality, and processing efficiency can be improved.

Preferably, the tail end edge of a knife of first edge of milling cutter is rounded corner structure.In this way, after processing is completed, can keep away The inner wall for exempting from the threaded hole that the first edge of milling cutter is formed processing in withdrawing causes to damage, and influences processing quality.

Detailed description of the invention

Fig. 1 be using the utility model screw thread gang milling knife from top to bottom machining internal thread when the first schematic cross-sectional view；

Fig. 2 be using the utility model screw thread gang milling knife from top to bottom machining internal thread when the second schematic cross-sectional view；

Rotational trajectory schematic diagram when Fig. 3 is using the utility model screw thread gang milling knife machining internal thread.

Specific embodiment

In the following, being described in detail in conjunction with Fig. 1-3 pairs of the utility model screw thread gang milling knives.

As illustrated in fig. 1 and 2, the utility model screw thread gang milling knife includes knife handle (not shown) and knife bar 1, knife bar 1 Connecting pin is connect with knife handle, and first edge of milling cutter 11 and multiple second edge of milling cutter 12, the first milling cutter are provided on knife bar 1 Blade 11 close to the connecting pin of knife bar 1, the second edge of milling cutter 12 between the first edge of milling cutter 11 and the free end of knife bar 1, And first edge of milling cutter 11 tooth be wider than the second edge of milling cutter 12 tooth it is wide.Preferably, the tooth width of the first edge of milling cutter 11 is Wide 2-3 times of the tooth of second edge of milling cutter 12.In this way, it is ensured that the first edge of milling cutter 11 being capable of remaining 21 Hes of once resecting feed The imperfect internal screw thread tooth 22 formed into knife-edge part, can not only guarantee processing quality, but also processing efficiency can be improved.Preferably, The tail end edge of a knife 111 of first edge of milling cutter 11 is rounded corner structure.In this way, after processing is completed, can avoid the first edge of milling cutter The inner wall 2 of 11 threaded holes formed in withdrawing to processing causes to damage, and influences processing quality.

When using the utility model screw thread gang milling knife machining internal thread in the hole on workpiece 2, as shown in figure 3, first benefit With the screw thread gang milling knife radially from point A to tangent line arc point B, then phase cutting-in tool is to deepest point C, then from deepest point C returns to point E through point D, then tangentially circular arc finally returns to point G from point F to point F.It can be seen that turn around in screw thread gang milling knife, An i.e. in axial direction uniform screw pitch of advancing, to complete the processing of screw thread.In addition, in process, screw thread gang milling knife In be located at knife bar 1 first the second edge of milling cutter 12 of free end can generate feed remaining 21 in axial feed and be formed Imperfect internal screw thread tooth 22, when the first edge of milling cutter 11 reaches at feed remaining 21 and imperfect internal screw thread tooth 22, the first milling Knife blade 11 can remove feed remaining 21 and imperfect internal screw thread tooth 22, to complete the processing of internal screw thread.

To sum up, when using this kind of screw thread gang milling knife machining internal thread in the hole on workpiece, using the first milling Knife blade can guarantee the threaded hole that processing is formed in remaining and into knife-edge part formation the imperfect internal screw thread tooth of excision feed Screw assembly can be carried out with pairing workpiece.

In addition, the utility model screw thread gang milling knife not only can also the machining internal thread in hole from the bottom up, while may be used also To be used for threading and other kinds of screw thread.

Claims (3)

1. a kind of screw thread gang milling knife, which is characterized in that the screw thread gang milling knife includes knife handle and knife bar, the connecting pin of the knife bar with The knife handle connects, and is provided with first edge of milling cutter and multiple second edge of milling cutter, first milling cutter on the knife bar Blade is located at the freedom of first edge of milling cutter and the knife bar close to the connecting pin of the knife bar, second edge of milling cutter Between end, and the tooth of first edge of milling cutter be wider than second edge of milling cutter tooth it is wide.

2. screw thread gang milling knife according to claim 1, which is characterized in that the tooth width of first edge of milling cutter is described the Wide 2-3 times of the tooth of two edge of milling cutter.

3. screw thread gang milling knife according to claim 2, which is characterized in that the tail end edge of a knife of first edge of milling cutter is circle Chamfering structure.