CN202240612U

CN202240612U - Tool clamp

Info

Publication number: CN202240612U
Application number: CN2011203015710U
Authority: CN
Inventors: 石大鹏; 施贤明; 王四华; 虞玉华; 周杰; 余威; 黄忠宏; 穆延兵; 沈鹏
Original assignee: Henan Aerospace Precision Machining Co Ltd
Current assignee: Henan Aerospace Precision Machining Co Ltd
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2012-05-30
Anticipated expiration: 2021-08-18

Abstract

The utility model discloses a tool clamp which comprises a clamp body used for being coaxially arranged with a main shaft of a lathe chuck; a groove extending inwards and used for assembling a workpiece is arranged on the front end surface of the clamp body; the groove is provided with a side wall which is used for being matched with the outer edge surface of the workpiece in a limiting way and is closed; a gland used for tightly pressing the workpiece on the bottom surface of the groove is assembled at the front end part of the clamp body; and through holes are arranged on the end surface of the gland. When the tool clamp is used, the workpiece is placed in the groove matched with the outer edge surface of the workpiece in a limiting way, and is tightly pressed by the end surface of the gland and the bottom surface of the groove, a cone-shaped sleeve in the prior art is not needed, few parts are needed, the dimensional deviation for processing the workpiece is small, the precision is high, the workpiece is ensured not to be stressed in the radial direction, no centripetal elastic deformation is generated, the form and position tolerance for the size of the processed product is stable, and the size of the product is accurate.

Description

A kind of frock clamp

Technical field

The utility model relates to a kind of when machined, is used for workpiece is fixed on the frock clamp on the lathe.

Background technology

In the machined field, need carry out machined to the out-of-shape workpiece sometimes, carry out hole processing such as the Aeronautics and Astronautics field with eccentric block, interior hole dimension and Geometrical Tolerance Principle are high, and clamping workpiece is particularly important.At present the processing eccentric orfice uses anchor clamps employing notification number to be a kind of elasticity eccentric fixture that discloses in the CN 101941159A Chinese patent specification, and this elasticity eccentric fixture includes the clamp body of taper shank, and the clamp body leading section is processed taper hole; In this taper hole elastic conical drogue is installed; And both taper fit are opened a narrow groove on the cylindrical of elastic conical drogue, the clamp body leading section is fastenedly connected the gland that is used to compress elastic conical drogue; Elastic conical drogue cylindrical center line with add the inner hole centreline of holding part and have eccentric throw; With the processing eccentric orfice, because the eccentric throw that exists causes the jacket wall of this elastic conical drogue inhomogeneous, because the elastic jacket wall unevenness is even; Product produces entad elastic deformation amount in the process, so product size precision that the method processes and form and position tolerance are unstable, inaccuracy.This anchor clamps adopt workpiece outer wall fixedly clamping locate, easily workpiece is crushed, when when very high, causing workpiece outer wall precision not enough the required precision of workpiece outer wall.

The utility model content

The purpose of the utility model is to provide a kind of frock clamp, with dimensional accuracy and form and position tolerance instability and the coarse problem that solves the eccentric block hole that processes in the prior art.

For realizing above-mentioned purpose; The utility model adopts following technical scheme: a kind of frock clamp; Comprise being used for and the coaxial mounted clamp body of lathe chuck main shaft that the front end face of said clamp body is provided with the groove that is used to assemble workpiece that extends internally, said groove has and is used for cooperating and the sidewall of sealing with the workpiece outer edge surface is spacing; The clamp body leading section is equipped with and is used for the gland of Work-sheet pressing on the bottom surface of said groove, and the gland end face is provided with through hole.

The bottom surface of said groove is provided with the feed blind hole that extends internally, the center line of feed blind hole and the central lines of said through hole.

Said gland has tubular construction; The front end of this tubular construction is provided with the end plate with the front opening sealing of tubular construction; Described through hole is opened on the end plate, and the inner peripheral surface of tubular construction is provided with screw thread, said gland through this screw thread revolve be located at clamp body leading section with workpiece pressing.

Said clamp body is a multidiameter, and the end that diameter is bigger is a front end.

The utility model is directly put into workpiece and the spacing groove that cooperates of workpiece outer edge surface in use, through gland end face and groove floor workpiece is compressed; Do not need conical sleeve of the prior art, part is less, and the dimensional discrepancy of the product that processes is little; Precision is high, and workpiece do not stressing in the radial direction, does not have entad strain; The product size form and position tolerance that processes is stable, and product size is accurate.

Description of drawings

Fig. 1 is the user mode cutaway view of the embodiment of the utility model;

Fig. 2 is the half sectional view of clamp body among Fig. 1;

Fig. 3 is the right view of Fig. 2;

Fig. 4 is the half sectional view of gland among Fig. 1;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is the another kind of user mode cutaway view of the embodiment of the utility model.

The specific embodiment

A kind of embodiment of frock clamp; Extremely shown in Figure 5 like Fig. 1; The clamp body 1 of this frock clamp is illustrated in figure 2 as multidiameter, and the end that the multidiameter diameter is bigger is the front end of clamp body, is shaped on screw thread on the periphery of the bigger end of said multidiameter diameter; The groove 3 that is used to assemble workpiece 4 that the front end face setting of clamp body extends internally; The shape of this groove inwall is illustrated in figure 3 as and is the circular arc of symmetry up and down, and two corresponding end points of circular arc connect with straight line respectively, and the shape of this shape and workpiece 4 is complementary.The bottom of said groove 3 extends internally to be provided with along center line and puts drill bit feed blind hole when stretching out the workpiece bottom when supplying the bit drills through hole, and as shown in Figure 1, described clamp body front end is equipped with gland 2; Said gland 2 is like Fig. 4 and shown in Figure 5, and this gland has tubular construction, and the front end of tubular construction is provided with the end plate that is used for the front opening sealing of tubular construction; Have on the described end plate and supply drill bit to stretch into boring through hole, be shaped on screw thread on the inner headed face of gland, with the above threaded engagement of clamp body 1; Embodiment as shown in Figure 1 in use; In described groove, gland revolves through screw thread and is located at the clamp body leading section, the central lines of the center line of the above through hole of gland and feed blind hole with workpiece 4 clampings; When screwing in gland 2; Gland 2 end plates are inboard to be cooperated with workpiece opposite side roof pressure, workpiece 4 is pressed on the bottom surface of groove, and can carry out hole processing this moment to workpiece 4.

As shown in Figure 6; For these anchor clamps of the utility model can also be used for processing bolt class workpiece, at this moment the shape of the groove of clamp body end is arranged to regular hexagon, is complementary with the nut shape of bolt class workpiece; Bolt is put in the groove; The screw portion of bolt passes the through hole of gland, when screwing gland, can realize bolt is pressed on the bottom surface of groove.

On the bottom surface of groove, extend internally in the foregoing description and be provided with the feed blind hole, certainly, also the feed blind hole can be set; When processing through hole on workpiece; Described feed blind hole need be set, when processing blind hole on workpiece, this feed blind hole can be set; During processing bolt class workpiece, also this feed blind hole can be set.

The inwall of the groove in the foregoing description is used for cooperating with the workpiece outer edge surface is spacing; The inner wall shape of groove is not limited to the shape in the foregoing description, so those skilled in the art can also adjust the shape of the inwall of groove according to the shape of the outer edge surface of workpiece to be processed.

Gland in the foregoing description comprises cylindrical body and end plate; Can gland directly be arranged to plate body, on the end face of plate body, offer the open-work that supplies screw to get into, plate body is fixed on the clamp body front end face through screw near outer edge surface; Screw in screw with workpiece pressing; The clamp body leading section can also be arranged to flange arrangement, gland is fixedly connected on the flange of clamp body leading section through bolt, and gland can also be other structures certainly; And can be fixedly connected with clamp body through other removablies, come workpiece pressing.

Claims

1. frock clamp; Comprise and being used for and the coaxial mounted clamp body of lathe chuck main shaft; It is characterized in that the front end face of said clamp body is provided with the groove that is used to assemble workpiece that extends internally, said groove has and is used for cooperating and the sidewall of sealing with the workpiece outer edge surface is spacing; The clamp body leading section is equipped with and is used for the gland of Work-sheet pressing on the bottom surface of said groove, and the gland end face is provided with through hole.

2. frock clamp according to claim 1 is characterized in that, extends internally to be provided with the feed blind hole center line of feed blind hole and the central lines of said through hole on the bottom surface of said groove.

3. frock clamp according to claim 1; It is characterized in that; Said gland has tubular construction, and the front end of tubular construction is provided with the end plate with the front opening sealing of tubular construction, and described through hole is opened on the end plate; The inner peripheral surface of tubular construction is provided with screw thread, and said gland revolves the leading section that is located at clamp body through this screw thread.

4. according to claim 1 or 2 or 3 described frock clamps, it is characterized in that said clamp body is a multidiameter, the end that diameter is bigger is a front end.