CN202356655U

CN202356655U - Automatic centralizer for machining sleeve parts

Info

Publication number: CN202356655U
Application number: CN2011204246549U
Authority: CN
Inventors: 邱禄魁; 戴玉花
Original assignee: LONGYAN LISHANG PRECISION MACHINERY CO Ltd
Current assignee: LONGYAN LISHANG PRECISION MACHINERY CO Ltd
Priority date: 2011-11-01
Filing date: 2011-11-01
Publication date: 2012-08-01
Anticipated expiration: 2021-11-01

Abstract

The utility model discloses an automatic centralizer for machining sleeve parts. The automatic centralizer comprises a morse taper mandrel (1), a hydraulic device (2), an expansion device (3), a locking nut (4) and positioning pins (2-6), wherein the hydraulic device comprises cylinder covers (2-1), a cylinder barrel (2-4), bolts (2-2), cylinder cover bearings (2-5) and hydraulic oil connectors (2-3); the positioning pins (2-6) arranged on the cylinder covers (2-1) are in axial sliding fit with holes on a tailstock of a machine tool; the expansion device comprises a sliding cone (3-3), an expansion sleeve (3-1), return springs (3-2) and a bearing; the expansion sleeve (3-1) is equally divided into three sector parts along the radial direction, and gaps a are reserved on dividing parts; and the locking nut (4) positioned at the tail end of the mandrel reliably positions the mandrel (1), the expansion device (3) and the hydraulic device (2) to ensure the normal work of the automatic centralizer. The automatic centralizer for machining the sleeve parts has the characteristics of stable machining, high machining accuracy, high machining efficiency and low cost.

Description

The core device is decided in the sleeve part machined automatically

One, technical field

The utility model relates to a kind of machining frock, decides the core clamping device when being specifically related to utilize machine tooling sleeve parts such as numerically controlled lathe, engine lathe, numerically control grinder, general-purpose grinder.

Two, background technology

The clamping frock can not be decided core effectively and clamped securely during existing sleeve part machined, generally adopts head-clamp tail top mode to come clamping, and the problem that this fixture technology exists is:

1, want product processed all will process positioning reference in advance for every, as drawing 60 ° of locating surfaces of nose end, extra manufacturing procedure and the workload of having increased not only increases production cost but also reduce inefficiency.

2, the Workpiece internal-external circle concentricity accuracy class is lower, is generally the 9-10 level.

3, the no automatic centering device in clamping location can not be decided core automatically, mainly operate by the people, thereby the clamping error is big, has influenced processing precision of products.

4, when processing during than long sleeve class part, owing to only depend on tailstock centre to hold out against, workpiece and top clamping contact-making surface are little, and easy generation is rocked, and can't guarantee the stationarity of processing, thereby influence the machining accuracy of product.

Three, summary of the invention

The purpose of the utility model provides the sleeve part machined that a kind of sleeve part machining is steady, machining accuracy is high, working (machining) efficiency is high, cost is low and decides the core device automatically.

For realizing above purpose, the machined of the utility model sleeve part is decided the core device automatically and is comprised Mohs cone mandrel, hydraulic means, swelling device, locking nut and alignment pin; Said hydraulic means comprises cylinder cap, cylinder barrel and joint, and cylinder cap is connected with bolt locking with cylinder barrel, through cylinder cap bearing and end cap hydraulic means is bearing on the mandrel; Be contained in alignment pin and the hole axial sliding fit on the tailstock tool on the cylinder cap; Said swelling device comprises sliding cone, expansion sleeve and back-moving spring; Expansion sleeve radially average mark is slit into three fan-shaped parts; Reserve gap a at segmentaion position, expansion sleeve and sliding cone are that the conical surface is slidingly matched, and sliding cone is bearing on the mandrel through former and later two bearings; Be positioned at the terminal locking nut of mandrel mandrel, swelling device and hydraulic means are reliably located, guarantee to decide automatically core device operate as normal.

Three fan-shaped parts of said expansion sleeve are a=3-6mm in the gap that segmentaion position is reserved.

Adopt the above-mentioned mandrel, hydraulic means, the isostructural sleeve part machined of swelling device of having to decide the core device automatically, under computer control, the sleeve part of different size carried out deciding core automatically, have following effect:

1, need not to process in addition the positioning and clamping datum level, high efficiency, realized to the different size workpiece automatically decide core, firm clamping, accurate positioning, the Workpiece internal-external circle concentricity accuracy class of processing can reach 4～5 grades.

2, owing to adopted Mohs cone mandrel, can realize cooperating installation with the tailstock tool hole.

3, hydraulic means is under rated pressure 4MPa, and through computer control, master cylinder barrel stroke 0-10mm realizes the different size workpiece is carried out deciding automatically the core clamping automatically.

4, the expansion sleeve of swelling device is slidingly matched through the high-precision conical surface with sliding cone; Realize the high-axiality (deviation is in 0.02mm) of expansion sleeve and sliding cone; Guarantee workpiece and the high-axiality rotation of deciding the core device automatically, thereby guaranteed the high-axiality of Workpiece internal-external circle.

5, be designed to the expansion sleeve of swelling device radially that average mark is slit into three parts, under the effect of back-moving spring and sliding cone, can radially swell or shrink range of expansion: 0-8mm, realize the workpiece swelling of different size or unclamp.

6, the expansion sleeve of swelling device is under the effect of back-moving spring, swell or when shrinking stressed evenly, and cooperate with sliding cone reliably; Realizing deciding automatically the core device swells reposefully and shrinks; And expansion sleeve and workpiece endoporus swelling clamping, contact-making surface is big, and clamping workpiece is solid and reliable.

Four, description of drawings

Fig. 1 is that the machined of the utility model sleeve part is decided core device master automatically and looked cutaway view

Fig. 2 is that the machined of the utility model sleeve part is decided core device expansion sleeve automatically and cut apart sketch map

Five, embodiment

Below through accompanying drawing and the specific embodiment to the utility model sleeve part machined decide the core device automatically and be further elaborated.

As shown in Figure 1, the machined of the utility model sleeve part is decided the core device automatically and is made up of mandrel 1, hydraulic means 2, swelling device 3, locking nut 4 and alignment pin 2-6; One end of mandrel 1 has designed Morse's taper 1-1, can directly cooperate assembling with tailstock tool; Hydraulic means 2 comprises cylinder cap 2-1, bolt 2-2, hydraulic oil joint 2-3, cylinder barrel 2-4 and bearing 2-5, and cylinder cap 2-1 is connected through bolt 2-2 locking with cylinder barrel 2-4, through bearing 2-5 and end cap 2-1 hydraulic means 2 is bearing on the mandrel 1; Be contained in alignment pin 2-6 and the hole axial sliding fit on the tailstock tool on the cylinder cap 2-1; Swelling device 3 comprises expansion sleeve 3-1, back-moving spring 3-2 and sliding cone 3-3; Expansion sleeve 3-1 radially average mark is slit into three fan-shaped part 3-1.1; Reserve 3-6mm gap a3-1.2 at segmentaion position; Expansion sleeve 3-1 and sliding cone 3-3 are that the conical surface is slidingly matched, and sliding cone 3-3 is bearing on the mandrel 1 through ball bearing 3-4 and needle bearing 3-5; Be positioned at the terminal locking nut 4 of mandrel mandrel 1, swelling device 3, hydraulic means 2 are located reliably, guarantee to decide automatically core device operate as normal.

During work; Hydraulic pressure is decided the Mohs cone 1-1 of core device through mandrel 1 automatically and is fixed on the tailstock tool; Being contained in the alignment pin 2-6 that is symmetrical distribution on the cylinder cap 2-1 simultaneously is slidingly matched and is inserted in corresponding two holes on the tailstock; Make hydraulic pressure decide the core device automatically and can do the synchronous rotation with sleeve class workpiece 5 except that the expansion sleeve 3-1 and the sliding cone 3-3 of swelling device 3, remainder only can be done and tailstock tool moving axially in the same way.

Under the control of system, the tailstock drive is decided the core device automatically and is axially moved, and is inserted in sleeve class workpiece endoporus.System controls the stroke L2-4.2 of oil pressure with the control hydraulic means automatically according to the size of workpiece 5 internal diameters; Be located at the hydraulic oil of cylinder cap 2-1 top connection 2-3 through automatic injection; Axially move toward workpiece 5 directions through oil duct 2-1.1 on the cylinder cap 2-1 and automatic cylinder cap 2-1 and the cylinder barrel 2-4 that decides the core device of the driving of the oil duct 2-4.1 on the cylinder barrel 2-4; Thereby promote swelling device 3 distendings and be divided into three fan-shaped parts; And radially move along sliding cone 3-3 by the expansion sleeve 3-1 that back-moving spring 3-2 is locked, with workpiece 5 endoporus swellings; End face ball bearing 2-5 on the cylinder barrel 2-4 keeps and the static relatively state of expansion sleeve 3-1 cylinder barrel 2-4; End face ball bearing 3-4 on the sliding cone 3-3 keeps and sliding cone 3-3 relative static conditions locking nut 4; Needle bearing 3-5 between sliding cone 3-3 and the mandrel 1 keeps and sliding cone 3-3 relative static conditions mandrel 1, thereby realization workpiece 5 and hydraulic pressure are decided the coaxial processing stably of core device automatically; During process finishing, decompression under system's control, cylinder barrel 2-4 drives expansion sleeve 3-1 and moves toward the tailstock direction; Under the effect of back-moving spring 3-2; Expansion sleeve 3-1 does radial contraction along sliding cone 3-3 and moves, and loosens workpiece 5, whole automatically decide the core device at random the tailstock seat shift out workpiece 5.

Expansion sleeve 3-1 can radially magnify or dwindle under the effect of back-moving spring 3-2 and sliding cone 3-3, realizes the swelling of workpiece 5 and loosens; Through sliding with the cone match of sliding cone 3-3, guaranteed the axiality of expansion sleeve 3-1 and sliding cone 3-3, the core device is coaxial, the clamping of swelling thereby the realization workpiece is decided with hydraulic pressure automatically.

Claims

1. the core device is decided in a sleeve part machined automatically, it is characterized in that: it comprises Mohs cone mandrel (1), hydraulic means (2), swelling device (3), locking nut (4) and alignment pin (2-6); Said hydraulic means comprises cylinder cap (2-1), cylinder barrel (2-4) and hydraulic oil joint (2-3), and cylinder cap (2-1) is connected with bolt (2-2) locking with cylinder barrel (2-4), through cylinder cap bearing (2-5) and end cap (2-1) hydraulic means (2) is bearing on the mandrel (1); Be contained in the hole axial sliding fit on alignment pin (2-6) and the tailstock tool on the cylinder cap (2-1); Said swelling device (3) comprises sliding cone (3-3), expansion sleeve (3-1) and back-moving spring (3-2); Expansion sleeve (3-3) radially average mark is slit into three fan-shaped parts (3-1.1); Reserve gap a (3-1.2) at segmentaion position; Expansion sleeve (3-1) and sliding cone (3-3) are for the conical surface is slidingly matched, and sliding cone (3-3) is bearing on the mandrel (1) through former and later two bearings; Be positioned at the terminal locking nut (4) of mandrel (1) mandrel (1), swelling device (3) and hydraulic means (2) are reliably located, guarantee to decide automatically core device operate as normal.

2. the core device is decided in said sleeve part machined automatically according to claim 1, it is characterized in that: three fan-shaped parts (3-1.1) of said expansion sleeve (3-3) are 3-6mm at the gap a (3-1.2) that segmentaion position is reserved.