THREAD ROLLING DIES
[technical field]
The present invention relates to mechanical design field, relate in particular to a kind of THREAD ROLLING DIES.
[background technology]
Traditional THREAD ROLLING DIES, tooth form comprise roll threading, straight thread, reticulate pattern and trapezoidal screw etc., the regular width that is covered with whole THREAD ROLLING DIES of various screw threads.But this class THREAD ROLLING DIES is to the axis products roll extrusion time, roll extrusion localized metallic surface is produced plastic deformation and forms the shape opposite with the THREAD ROLLING DIES profile, because the part of one or both ends, plastic deformation roll extrusion position also produces distortion, as cylindricity, axiality or circle run-out tolerance, all more than 0.03, can't satisfy the product tolerance in 0.03 instructions for use with inferior accurate occasion.
[summary of the invention]
Based on this, be necessary to provide a kind of end to be processed roll extrusion position that can effectively prevent to produce the THREAD ROLLING DIES of distortion.
A kind of THREAD ROLLING DIES is used for rolling the excircle roll extrusion to machined part of tooth machine and produces plastic deformation, and THREAD ROLLING DIES comprises column gear wheel section and be located at the alignment section at gear wheel section two ends, and the external diameter of described alignment section is consistent with the external diameter of gear wheel section.
Preferably, the excircle of alignment section is round and smooth, and surface roughness is Ra1.6-Ra0.4.
Preferably, gear wheel section and alignment section are formed in one.
Preferably, the tooth form of gear wheel section is roll threading.
Preferably, the tooth form of gear wheel section is trapezoidal screw.
Preferably, the tooth form of gear wheel section is reticulate pattern.
Preferably, the tooth form of gear wheel section is straight burr.
Preferably, THREAD ROLLING DIES is provided with the installing hole that runs through gear wheel section and alignment section along axis direction.
Preferably, offer keyway on the hole wall of installing hole.
By the one or both ends in gear wheel section round and smooth alignment section is set, when carrying out machining to machined part, rolling tooth process and alignment process can carry out synchronously, production efficiency is provided, simultaneously, can guarantee that cylindricity, axiality or the round tolerance of beating of machining screw, trapezoidal screw, straight burr or one or both ends, reticulate pattern position within 0.005-0.025, satisfy the requirement to Product Precision.
[description of drawings]
Fig. 1 is the THREAD ROLLING DIES front view that an embodiment has roll threading;
Fig. 2 is the side view of THREAD ROLLING DIES shown in Figure 1;
Fig. 3 is the THREAD ROLLING DIES front view that an embodiment has trapezoidal screw;
Fig. 4 is the side view of THREAD ROLLING DIES shown in Figure 3;
Fig. 5 is the THREAD ROLLING DIES front view that an embodiment has straight burr;
Fig. 6 is the side view of THREAD ROLLING DIES shown in Figure 5;
Fig. 7 is the THREAD ROLLING DIES front view that an embodiment has reticulate pattern;
Fig. 8 is the side view of THREAD ROLLING DIES shown in Figure 7.
[specific embodiment]
The below mainly further describes in detail THREAD ROLLING DIES in conjunction with the drawings and the specific embodiments.
Rolling the tooth machine is the special mechanical equipment of producing the excircle screw thread.The operation principle of rolling the tooth machine is, pushes workpiece to be processed with two screwed THREAD ROLLING DIESs, makes the outer round surface generation plastic deformation of workpiece, forms screw thread.
The THREAD ROLLING DIES 100 of Fig. 1, an embodiment shown in Figure 2, namely be used for rolling tooth machine excircle to machined part carries out roll extrusion to be processed produce plastic deformation, to be processed excircle forms the shape opposite with THREAD ROLLING DIES 100 tooth forms.THREAD ROLLING DIES 100 comprises the gear wheel section 110 of column and is located at the column alignment section 120 at column gear wheel section 110 two ends.Other preferred embodiment in, alignment section 120 can also be only in end settings of gear wheel section 110, guarantee that the termination rolls the axiality of tooth product and circle and beat etc. and to meet the product quality requirement.
Alignment section 120 excircles are round and smooth, and surface roughness requires should be between Ra1.6-Ra0.4.
Preferably, the design that is formed in one of the gear wheel section of present embodiment 110 and alignment section 120, thus the machine-shaping of whole THREAD ROLLING DIES 100 is easier.
THREAD ROLLING DIES 100 offers for the installing hole 130 affixed with rolling corresponding fixture on the tooth machine along axis direction, and further offers keyway 140 at the hole wall of installing hole 130 along the axis direction of THREAD ROLLING DIES 100.THREAD ROLLING DIES 100 in the present embodiment is provided with a square keyway 140, in other embodiments, for guaranteeing that THREAD ROLLING DIES 100 each several parts are stressed evenly in rolling the tooth process, can also be symmetrical arranged a plurality of square keyways 140.
The gear wheel section 110 of present embodiment THREAD ROLLING DIES 100 is the roll threading structure, and in addition, gear wheel section 110 can also be other tooth form structure, specifically sees following embodiment.
Tooth form is the THREAD ROLLING DIES of trapezoidal screw:
As shown in Figure 3 and Figure 4, trapezoidal screw THREAD ROLLING DIES 200 comprises the gear wheel section 210 of column and is located at the round and smooth column alignment section 220 at column gear wheel section 210 two ends.The external diameter of alignment section 220 is consistent with the external diameter of gear wheel section 210, and gear wheel section 210 is formed in one with alignment section 220.The surface roughness of alignment section 220 requires should be between Ra1.6-Ra0.4.
Trapezoidal screw THREAD ROLLING DIES 200 offers for the installing hole 230 affixed with rolling corresponding fixture on the tooth machine along axis direction, and further offers keyway 240 at the hole wall of installing hole 230 along axis direction.
Tooth form is the THREAD ROLLING DIES of straight burr:
As shown in Figure 5 and Figure 6, straight burr THREAD ROLLING DIES 300 comprises the gear wheel section 310 of column and is located at the round and smooth column alignment section 320 at column gear wheel section 310 two ends.The external diameter of alignment section 320 is consistent with the external diameter of gear wheel section 310, and gear wheel section 310 is formed in one with alignment section 320.The surface roughness of alignment section 320 requires should be between Ra1.6-Ra0.4.Straight burr THREAD ROLLING DIES 300 offers for the installing hole 330 affixed with rolling corresponding fixture on the tooth machine along axis direction, and further offers keyway 340 at the hole wall of installing hole 330 along axis direction.
Tooth form is the THREAD ROLLING DIES of reticulate pattern:
As shown in Figure 7 and Figure 8, reticulate pattern THREAD ROLLING DIES 400 comprises the gear wheel section 410 of column and is located at the round and smooth column alignment section 420 at column gear wheel section 410 two ends.The external diameter of alignment section 420 is consistent with the external diameter of gear wheel section 410, and gear wheel section 410 is formed in one with alignment section 420.The surface roughness of alignment section 420 requires should be between Ra1.6-Ra0.4.
Reticulate pattern THREAD ROLLING DIES 400 offers for the installing hole 430 affixed with rolling corresponding fixture on the tooth machine along axis direction, and further offers keyway 440 at the hole wall of installing hole 430 along axis direction.
By the one or both ends at gear wheel round and smooth straightening-wheel is set, when carrying out machining to machined part, rolling tooth process and alignment process can carry out synchronously, production efficiency is provided, simultaneously, can guarantee that cylindricity, axiality or the round tolerance of beating of machining screw, trapezoidal screw, straight burr or one or both ends, reticulate pattern position within 0.005-0.025, satisfy the requirement to Product Precision.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.