CN206527350U - Steep-pitch thread processes Special three-jaw chuck - Google Patents

Abstract

The utility model discloses a kind of steep-pitch thread processing Special three-jaw chuck, include scroll chuck seat body and claw, the centre of the chuck seat is provided with through hole, claw is provided with above the chuck seat, the claw is flexibly connected with chuck, the claw is uniformly distributed on chuck seat, the clawed end portions are in 120 degree, the claw head is designed as V-shaped valley type, the claw head is with workpiece contact portion point inner corners through chamfering, claw head stress concentration can be reduced, the claw end surface is designed with slip-resistant texture, the frictional force with workpiece can be increased when being loaded, and effectively prevent workpiece surface damage.Using the technical solution of the utility model, by large-diameter workpiece clamping on the chuck, common clamping chuck is unstable before solving, the problem of workpiece is easily slided, workpiece is more stable in process, reduces Workpiece vibration, the suface processing quality of workpiece is effectively improved, processing benefit is improved.

Description

Steep-pitch thread processes Special three-jaw chuck

Technical field

The utility model is related to the special mould clamp of the Vehicle Processing of steep-pitch thread, in particular, is related to a kind of chuck.

Background technology

Large-lead screw is the significant components of numerical control Large multi-station press, and because diameter of work is big, axial length is longer, Rigidity is low, and the thread pitch of required processing is big, and cutting point positional precision is high, and workpiece surface quality requires high factor, production Middle to use relatively low cutting speed and high feed speed, this processing mode is typical high feeding cutting.

At present, steep-pitch thread processing mode is：

1. it is processed on lathe；

2. common scroll chuck is used, as shown in figure 1, its linear type in claw head, workpiece is fixed on lathe；

3. turning processing method routinely, the processing of screw cutting is carried out using lathe tools to workpiece.

The processing mode of above-mentioned steep-pitch thread is disadvantageous in that：Claw is used to be fixed for linear scroll chuck During the big workpiece of diameter, cause the time used in clamping long, its band working position coincide the time with the cutting lines matching of lathe tools It is longer, cause inefficiency；When using claw for linear scroll chuck fixation workpiece, contact of the workpiece with chuck only has Three point contact, causes clamping workpiece unstable, causes process system vibration acutely, Workpiece vibration is strong in process, makes Strong reciprocation is formed between Workpiece vibration and process tool vibration, causes tool wear to be aggravated, or even cracking of cutter, The stability of high feeding machining is difficult to ensure that, thread surface quality is had a strong impact on, causes workpiece surface quality to deteriorate, it is difficult to The quality requirement of screw thread process is reached, causes workpiece to scrap during serious vibration.

The content of the invention

The purpose of this utility model aims to provide a kind of chuck, to solve the deficiency of prior art presence.

Problem to be solved in the utility model, which is to provide one kind, can reduce the clamping time, and workpiece table is prevented during clamping workpiece Surface damage, the clamping workpiece that can stablize makes the steep-pitch thread cutting Special three-jaw chuck that process is more stable.

The utility model employs following technical scheme：A kind of scroll chuck, includes scroll chuck body and claw.Institute The top for stating chuck seat is provided with claw, and the claw is three, and the claw is uniformly with chuck seat, conveniently stepping up required processing Workpiece, the claw mutually coordinated 120 degree, and the claw is flexibly connected with chuck seat, tells that claw includes claw head and claw Body, claw head is designed as V-shaped, and port is towards chuck circle centre position, and the claw cephalic par reduces its stress collection through chamfered In, the claw end surface is designed with slip-resistant texture, and the more stable clamping workpiece of energy prevents workpiece from sliding, the claw chuck Through chamfering and surface is designed with slip-resistant texture, it can prevent workpiece surface from scratching in clamping workpiece.Because the claw includes card Pawl head and jaw body, claw head is with jaw body by pin connection, and its connected mode can change card to be detachably connected by pin Pawl head.

Example claw head V-shaped end of the present utility model prevents its stress concentration, in clamping workpiece through chamfered When can prevent workpiece surface from scratching, and can more stablize in clamping workpiece, effectively can prevent workpiece from sliding, it is to avoid process There is situation about loosening.

Preferably, the claw cephalic par of the utility model chuck is designed with slip-resistant texture, processing needed for more stepping up Workpiece.

Brief description of the drawings

Fig. 1 is the schematic diagram of present engine lathe chuck and claw.

Fig. 2 is the schematic diagram of the utility model chuck and claw.

Fig. 3 is the schematic diagram of Fig. 2 claw head.

Fig. 4 is the end view of the claw head of the utility model chuck.

Embodiment

The utility model is illustrated below with reference to accompanying drawing.Reference picture 2, the utility model chuck, it includes chuck Have in body 1, the jaw body of claw 3 on chuck body in claw first 5 and jaw body 6, the setting of claw 3 and chuck body 1, claw 3 are flexibly connected with chuck body 1, claw 3 in 120 degree uniformly with chuck body 1, the port of jaw body 5 be in V-shape, opening point to block The disk center of circle, claw first 5 is to be detachably connected by connecting pin 2 with jaw body 6, and manhole 4 is provided with chuck body 1.

Claw 3 has three, uniformly with chuck body 1, on claw 3 the V-shape end of included claw first 5 through chamfering, As shown in Fig. 3 chamferings 7, the V-shaped port of claw first 5, can be more more stable than linear pattern claw in clamping workpiece after chamfering Clamping workpiece, and effectively can prevent workpiece surface from scratching, and the stress concentration of the claw first 5 in clamping can be reduced, prevent claw First 5 damage, improves claw physical life.

With reference to Fig. 4, the end 9 of claw first 5 is designed with slip-resistant texture 10, can firmly grasp workpiece, can be prevented in clamping workpiece Workpiece is slided, stability when can improve processing in processing, is prevented Workpiece vibration, is improved workpiece surface crudy.

In use, the utility model chuck 1 on Installing machine tool, workpiece is placed on claw 3, regulation claw 3 makes its firm Clamping workpiece, practical claw 3, easily makes claw wear and tear for a long time, can make claw will not be because of rubbing by changing claw first 5 Wipe impaired and clamp and do not live workpiece.When processing non-steep-pitch thread, also other replaceable claw heads.

Comparatively speaking, with common scroll chuck before（As shown in Figure 1）Compare, the claw 11 of scroll chuck originally is in Linear pattern, workpiece surface damage is easily caused in clamping workpiece, and clamping difficulty is big, and the clamping time is long, and clamping is insecure；By Insecure in clamping, workpiece easily vibrates in process, causes workpiece processing quality low.Use the utility model card Disk, when workpiece is placed on claw, workpiece can be more stable, the clamping time can be reduced in clamping, due to the utility model card The end of the claw 3 of disk is V-shape, can more be stablized in clamping large-diameter workpiece, on the claw 3 of the utility model chuck The V-shape end of claw first 5 is handled by rounding, fillet 7 is made, in clamping workpiece.The contact point of claw and workpiece increases Many, clamping workpiece that can be more firm can have anti-than the stronger clamping workpiece of linear pattern claw 11, the end portion treatment of claw first 5 Sliding texture 10, effectively can prevent workpiece from sliding in card engaging workpiece, and in steep-pitch thread process.

Described above is one or more of embodiments of the present utility model, is not limited of the present utility model.But Protection domain of the present utility model is not limited to this.Any change obtained without creative work for above-described embodiment or Replace, should all cover within the protection domain of claims of the present utility model.

Claims (5)

1. a kind of steep-pitch thread processes Special three-jaw chuck, it is characterised in that：The scroll chuck includes chuck seat and card Pawl, the claw is flexibly connected with chuck seat, and the claw one has three, and the claw is uniformly distributed in chuck in 120 degree On seat, the claw, which is oriented in the middle part of the center position of chuck seat, the chuck seat, is provided with circular hole, and the claw includes claw head With jaw body, the claw head is to be detachably connected by connecting pin with jaw body, and the claw cephalic par designs for V-shape, Point to the chuck center of circle in port.

2. chuck according to claim 1, it is characterized in that：Diameter of the claw along chuck seat is arranged at the chuck seat On, the claw uniformly with the chuck seat.

3. chuck according to claim 1, it is characterized in that：The end of the claw head is designed in V-shaped valley type, the claw Home position of the head towards the chuck seat.

4. chuck according to claim 1, it is characterized in that：The V-shape port interior angle of the claw head is handled through rounding.

5. chuck according to claim 1, it is characterized in that：The end surface of the claw head is designed with slip-resistant texture.