CN212122391U - Chuck for numerical control machine tool for machining self-locking nut - Google Patents
Chuck for numerical control machine tool for machining self-locking nut Download PDFInfo
- Publication number
- CN212122391U CN212122391U CN202020232304.1U CN202020232304U CN212122391U CN 212122391 U CN212122391 U CN 212122391U CN 202020232304 U CN202020232304 U CN 202020232304U CN 212122391 U CN212122391 U CN 212122391U
- Authority
- CN
- China
- Prior art keywords
- ejector rod
- section
- chuck
- cavity
- ejector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a chuck for digit control machine tool for processing auto-lock nut, include: the chuck body comprises a clamping section and a fixing section, the clamping section is provided with a first cavity for placing the self-locking nut, the fixing section is provided with a second cavity, and the second cavity is communicated with the first cavity through an engagement hole; the ejector rod mechanism comprises an ejector rod supporting sleeve arranged in the second cavity, an ejector rod axially and movably arranged in the ejector rod supporting sleeve and a spring; the ejector rod is provided with a first annular step and is divided into a guide section positioned at the rear part and an ejector head section positioned at the front part by the first annular step, the ejector head section of the ejector rod penetrates through the connecting hole and then enters the first cavity, and the ejector head section of the ejector rod is columnar and has a cross-sectional area smaller than that of the connecting hole. The top section of the ejector rod does not rub the chuck, and the clamping section of the chuck cannot clamp the self-locking nut in place in the radial clamping process, so that the self-locking nut can be effectively clamped.
Description
Technical Field
The utility model relates to a self-locking nut processing equipment technical field especially relates to a chuck for digit control machine tool for processing self-locking nut.
Background
The chuck is used for clamping and fixing a workpiece to be machined during machining of a machine tool, such as hole machining and thread machining of a self-locking nut. The clamping part of the chuck is generally multi-petal, the outer side surface of the clamping part is also generally an inclined surface, a clamping sleeve matched with the clamping part is arranged outside the clamping part, and the inner surface of the clamping sleeve is also an inclined surface. All parts of the clamping part are close to the center under the action of the clamping sleeve, so that the workpiece wrapped in the clamping part is clamped. After the workpiece is machined, due to the existence of the clamping sleeve and the fact that the whole chuck is installed on the installation seat, the workpiece is difficult to directly take out, and machining efficiency is affected.
In order to solve the technical problem, chinese utility model patent with application number CN201320698730.4 (No. CN203599563U) discloses a spring chuck with automatic discharging device, the spring chuck includes a chuck body, the chuck body is divided into a clamping section of front end and a fixing section of rear end, the clamping section is a cone, the clamping section is divided into at least three petals, form the chuck of clamping workpiece, the fixing section is hollow, the cavity of fixing section and the cavity of clamping workpiece in the clamping section communicate, a mandril is arranged in the cavity of fixing section, the front end of mandril stretches into the cavity of clamping workpiece in the clamping section, the rear end of fixing section is fixed with a mandril supporting sleeve, a circle of annular bulge is arranged on the mandril, and a compression spring is arranged between the annular bulge and the mandril supporting sleeve. The compression spring can keep the ejector rod in a jacking state constantly, when the pipe fitting is clamped, the ejector rod moves backwards under the extrusion of the pipe fitting to further compress the compression spring fixed on the ejector rod, and meanwhile, the pipe fitting is fixed by the clamping force of the spring chuck. When the pipe fitting is machined, the spring chuck is loosened by the mechanism, at the moment, the pipe fitting loses the clamping force of the spring chuck, the ejector rod moves forwards under the action of the compression spring, the pipe fitting is ejected out of the spring chuck, and the operation of automatic discharging is completed.
Although the chuck in the above patent can be used for clamping self-locking nut workpieces and realizing automatic discharge of the self-locking nut, in order to axially limit the self-locking nut placed in the clamping section cavity of the chuck, the front end of the ejector rod 1 of the chuck is generally set to be a positioning step 2 with a large front part and a small rear part, and after the self-locking nut is placed in place, the positioning step 2 at the front end of the ejector rod 1 can abut against the bottom wall 11 of the clamping section cavity 10 of the chuck, as shown in fig. 1 in detail. However, in the practical use process, it is found that, because the positioning step 2 of the ejector rod 1 of the chuck abuts against the bottom wall 11 of the clamping section cavity 10 of the chuck, and a certain friction force exists between the positioning step and the bottom wall, a plurality of petals of the clamping section of the chuck cannot be synchronously clamped inwards (in the direction shown by the arrow in fig. 1) to effectively clamp the self-locking nut, the parallelism and perpendicularity of the self-locking nut workpiece placed in the chuck are not sufficient, and the workpiece is easily shaken in the machining process, so that the machining precision of the workpiece is affected.
Therefore, the existing chuck for numerical control machine tool for processing the self-locking nut needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art's current situation, provide a chuck for digit control machine tool for processing auto-lock nut, this chuck can carry out the axial spacing problem that tight end clamp of clamp is not in place tightly that can avoid the chuck again to the ejector pin at the lapse in-process.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a chuck for a numerical control machine tool for machining a self-locking nut, comprising:
the chuck body comprises a clamping section positioned at the front end and a fixing section positioned at the rear end, the clamping section is provided with a first cavity for placing the self-locking nut, the fixing section is provided with a second cavity which is hollow along the axial direction, and the second cavity is communicated with the first cavity through a joint hole;
the ejector rod mechanism comprises an ejector rod supporting sleeve arranged in the second cavity, an ejector rod axially and movably arranged in the ejector rod supporting sleeve and a spring arranged between the ejector rod supporting sleeve and the ejector rod, and the front end of the ejector rod always has the tendency of extending forwards into the first cavity under the action of the spring;
the ejector rod is provided with a first annular step which is used for correspondingly abutting against the front end wall of the ejector rod supporting sleeve when the ejector rod moves backwards, the ejector rod is divided into a guide section positioned at the rear part and an ejector head section positioned at the front part by the first annular step, the guide section of the ejector rod penetrates through the ejector rod supporting sleeve, the ejector head section of the ejector rod penetrates through the connecting hole and then enters the first cavity, and the ejector head section of the ejector rod is columnar and has a cross sectional area smaller than that of the connecting hole.
In order to facilitate the assembly of the spring into the ejector rod support sleeve to effectively reset the ejector rod, a step hole is formed in the inner wall of the ejector rod support sleeve and comprises a small hole portion located on the rear side and a large hole portion located on the front side, a second annular step is arranged on the guide section of the ejector rod and is divided into a first guide section located on the rear side and a second guide section located on the front side by the second annular step, the outer diameter of the first guide section is matched with the inner diameter of the small hole portion of the ejector rod support sleeve, the outer diameter of the second guide section is matched with the inner diameter of the large hole portion of the ejector rod support sleeve, and the spring sleeve is arranged on the first guide section of the ejector rod and abuts against the second annular step of the ejector rod. The structure of the small hole part and the large hole part also enables the back-and-forth movement process of the ejector rod in the ejector rod supporting sleeve to be more stable.
As an improvement, the rear part of the first guide section of the ejector rod is in threaded connection with a first nut which can abut against the rear end wall of the ejector rod support sleeve. The arrangement of the first nut enables the ejector rod to realize axial limiting at the rear end, and the ejector rod is prevented from being separated forwards during resetting; on the other hand, the first nut can move along the axial length of the ejector rod and is limited at different axial positions of the ejector rod, so that the ejector head section of the ejector rod extends into the first cavity of the clamping section of the chuck body, and the length of the ejector head section of the ejector rod is adjusted, and the self-locking nut is adaptive to self-locking nut workpieces with different specifications (different thicknesses).
In order to make the back-and-forth movement process of the ejector rod more flexible and reduce resistance, the top section of the ejector rod is a cylinder.
In order to conveniently assemble the ejector rod supporting sleeve on the chuck body, a fixed sleeve is arranged in a second cavity of the fixed section of the chuck body, the ejector rod supporting sleeve is arranged in the fixed sleeve in a penetrating mode, the front end of the ejector rod supporting sleeve abuts against the front end wall of the fixed sleeve through a limiting convex part, and the rear end of the ejector rod supporting sleeve is in threaded connection with a second nut and abuts against the rear end wall of the fixed sleeve through the second nut.
Compared with the prior art, the utility model has the advantages that: the spacing of the ejector rod in the backward moving process can be realized by the fact that the first annular step of the ejector rod abuts against the front end of the ejector rod supporting sleeve, the ejector head section of the ejector rod is columnar, the cross section area of the ejector rod is smaller than that of the joint hole, when the ejector rod moves backwards through the joint hole in place, the ejector head section of the ejector rod does not rub with the chuck, the clamping section of the chuck cannot clamp the self-locking nut in place in the radial clamping process, the clamping section of the chuck can effectively clamp the self-locking nut, the parallelism and the perpendicularity of a workpiece of the self-locking nut arranged in the chuck are improved, and the machining precision of subsequent machining of the workpiece is improved.
Drawings
FIG. 1 is a schematic perspective view of a conventional chuck for a numerical control machine tool for machining a self-locking nut;
fig. 2 is a schematic perspective view of an embodiment of the present invention (the ejector rod is in a retracted state);
fig. 3 is a schematic perspective view of an embodiment of the present invention (the ejector rod is in a forward ejection state);
fig. 4 is a right side view of fig. 3.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Referring to fig. 2 to 4, a chuck for a numerical control machine tool for machining a self-locking nut includes a chuck body 10 and a lift pin mechanism including a fixing sleeve 25, a lift pin support sleeve 21, a lift pin 22, and a spring 23.
The chuck body 10 is formed in an overall shape of a long cylinder. The chuck body 10 includes a clamping section 11 at a front end and a fixing section 12 at a rear end. The fixed section 12 of the chuck body 10 has a second cavity 120 which is hollow along the axial direction, and the second cavity 120 is used for arranging the ejector rod mechanism. The clamping section 11 of the chuck body 10 has a plurality of petals, a first cavity 110 is formed in an area between the petals for placing a self-locking nut (not shown), and the second cavity 120 is communicated with the first cavity 110 through an engagement hole 130. After the self-locking nut is placed in the first cavity 110, the plurality of petals of the collet body 10 can be retracted inward by an external pressing mechanism (not shown) to clamp the self-locking nut.
The fixing section 12 of the chuck body 10 is provided with a fixing sleeve 25, and specifically, the fixing sleeve 25 can be fixed on the chuck body 10 by means of screw connection or welding. The ejector rod support sleeve 21 is inserted into the fixed sleeve 25, specifically, the ejector rod support sleeve 21 abuts against the front end wall of the fixed sleeve 25 at the front end through a limit convex part, and is in threaded connection with a second nut 26 at the rear end and abuts against the rear end wall of the fixed sleeve 25 through the second nut 26.
The ram is inserted into the ram support sleeve 21, and specifically, the ram can reciprocate back and forth in the ram support sleeve 21. The jack in this embodiment is divided into a first guide section 223, a second guide section 224, and a head section 220 in this order from the rear to the front in the axial direction thereof. The diameters of the three sections, the first guide section 223, the second guide section 224 and the head section 220, increase in sequence, so that a second annular step 222 is formed between the first guide section 223 and the second guide section 224, and a first annular step 221 is formed between the second guide section 224 and the head section 220. The side wall of the head section 220 of the ejector 22 in this embodiment is a flat wall surface that is in accordance with the axial direction of the ejector 22, and specifically, the head section 220 of the ejector 22 is a cylinder. In this embodiment, because the top section 220 of the top rod passes through the connecting hole 130 and then enters the first cavity 110, and the top section (220) of the top rod 22 is columnar and has a cross-sectional area smaller than that of the connecting hole 130, when the top rod 22 moves backwards to a proper position, the top section 220 of the top rod 22 does not rub against the chuck, so that the clamping section 11 of the chuck cannot clamp the self-locking nut in place in the radial clamping process, and thus the clamping section 11 of the chuck can effectively clamp the self-locking nut, thereby improving the parallelism and perpendicularity of the self-locking nut workpiece placed in the chuck, and improving the processing precision of subsequent processing of the workpiece.
When the self-locking nut is placed in the first cavity 110 of the chuck body 10 to drive the ejector rod to move backwards, the ejector rod can correspondingly abut against the front end wall of the ejector rod support sleeve 21 through the first annular step 221. The rear portion of the first guide section 223 of the jack rod is also threadedly connected with a first nut 24. After the self-locking nut is machined and taken out of the first cavity 110 of the chuck body 10, the first nut 24 can abut against the rear end wall of the ejector rod support sleeve 21, so that the ejector rod can be axially limited at the rear end, and the ejector rod 22 is prevented from being pulled out forwards during resetting. On the other hand, the first nut 24 in this embodiment can move along the axial length of the ejector rod and is limited at different axial positions of the ejector rod, so that the length of the ejector head section 220 of the ejector rod extends into the first cavity 110 of the clamping section 11 of the chuck body 10 to be adjusted, thereby adapting to self-locking nut workpieces of different specifications (different thicknesses).
A stepped hole is formed on the inner wall of the jack support sleeve 21, and in the present embodiment, the stepped hole includes a small hole portion 211 at the rear side and a large hole portion 212 at the front side. Correspondingly, the guide section (including the first guide section 223 and the second guide section 224) of the ejector 22 is inserted into the stepped hole of the ejector support sleeve 21. In this embodiment, the outer diameter of the first guide section 223 is matched with the inner diameter of the small hole portion 211 of the ejector rod support sleeve 21, and the outer diameter of the second guide section 224 is matched with the inner diameter of the large hole portion 212 of the ejector rod support sleeve 21, so that the process of moving the ejector rod back and forth in the ejector rod support sleeve 21 can be more stable. The spring 23 is sleeved on the first guiding section 223 of the ejector rod, specifically, the front end of the spring 23 abuts against the second annular step 222 of the ejector rod, and the rear end of the spring 23 abuts against the third annular step 210 formed between the small hole portion 211 and the large hole portion 212 of the ejector rod support sleeve 21.
The use process of the chuck for the numerical control machine tool for processing the self-locking nut of the embodiment comprises the following steps: when the self-locking nut is placed in the first cavity 110 of the chuck body 10, the self-locking nut abuts against the front end of the ejector section 220 of the ejector rod and drives the ejector rod compression spring 23 to move backwards, and when the ejector rod moves backwards to a proper position, the clamping section 11 of the chuck body 10 contracts to clamp the self-locking nut so as to complete the subsequent processing process, which is detailed in fig. 2; after the self-locking nut is machined, the clamping section 11 of the chuck body 10 releases the self-locking nut, and at this time, under the elastic force of the spring 23, the ejector rod moves forward to push out the self-locking nut in the first cavity 110 of the chuck body 10, so as to place the next self-locking nut workpiece, which is shown in detail in fig. 3.
Claims (5)
1. A chuck for a numerical control machine tool for machining a self-locking nut, comprising:
the chuck body (10) comprises a clamping section (11) located at the front end and a fixing section (12) located at the rear end, wherein the clamping section (11) is provided with a first cavity (110) for placing a self-locking nut, the fixing section (12) is provided with a second cavity (120) which is hollow along the axial direction, and the second cavity (120) is communicated with the first cavity (110) through an engagement hole (130);
the ejector rod mechanism comprises an ejector rod support sleeve (21) arranged in the second cavity (120), an ejector rod (22) axially and movably arranged in the ejector rod support sleeve (21) and a spring (23) arranged between the ejector rod support sleeve (21) and the ejector rod (22), and under the action of the spring (23), the front end of the ejector rod (22) always has the tendency of extending forwards into the first cavity (110);
the method is characterized in that: the ejector rod (22) is provided with a first annular step (221) which is used for correspondingly abutting against the front end wall of the ejector rod support sleeve (21) when the ejector rod moves backwards, the ejector rod is divided into a guide section located at the rear part and an ejector head section (220) located at the front part by the first annular step (221), the guide section of the ejector rod (22) is arranged in the ejector rod support sleeve (21) in a penetrating mode, the ejector head section (220) of the ejector rod (22) penetrates through the engagement hole (130) and then enters the first cavity (110), and the ejector head section (220) of the ejector rod (22) is columnar and the cross sectional area of the ejector head section is smaller than that of the engagement hole (130).
2. The chuck for a numerical control machine tool for machining the self-locking nut according to claim 1, wherein: the inner wall of the ejector rod support sleeve (21) is provided with a step hole, the step hole comprises a small hole portion (211) located on the rear side and a large hole portion (212) located on the front side, a second annular step (222) is arranged on the guide section of the ejector rod and is divided into a first guide section (223) located on the rear side and a second guide section (224) located on the front side by the second annular step (222), the outer diameter of the first guide section (223) is matched with the inner diameter of the small hole portion (211) of the ejector rod support sleeve (21), the outer diameter of the second guide section (224) is matched with the inner diameter of the large hole portion (212) of the ejector rod support sleeve (21), and the spring (23) is sleeved on the first guide section (223) of the ejector rod and abuts against the second annular step (222) of the ejector rod.
3. The chuck for a numerical control machine tool for machining the self-locking nut according to claim 2, wherein: the rear part of the first guide section (223) of the ejector rod is in threaded connection with a first nut (24) which can be abutted against the rear end wall of the ejector rod support sleeve (21).
4. The chuck for a numerical control machine tool for machining the self-locking nut according to claim 1, wherein: the top head section (220) of the ejector rod is a cylinder.
5. A chuck for numerical control machine tool for machining self-locking nut according to any one of claims 1 to 4, wherein: a fixed sleeve (25) is arranged in a second cavity (120) of the fixed section (12) of the chuck body (10), the ejector rod support sleeve (21) penetrates through the fixed sleeve (25), the front end of the ejector rod support sleeve (21) abuts against the front end wall of the fixed sleeve (25) through a limiting convex part, and the rear end of the ejector rod support sleeve is in threaded connection with a second nut (26) and abuts against the rear end wall of the fixed sleeve (25) through the second nut (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020232304.1U CN212122391U (en) | 2020-02-28 | 2020-02-28 | Chuck for numerical control machine tool for machining self-locking nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020232304.1U CN212122391U (en) | 2020-02-28 | 2020-02-28 | Chuck for numerical control machine tool for machining self-locking nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212122391U true CN212122391U (en) | 2020-12-11 |
Family
ID=73678384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020232304.1U Active CN212122391U (en) | 2020-02-28 | 2020-02-28 | Chuck for numerical control machine tool for machining self-locking nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212122391U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757012A (en) * | 2021-01-27 | 2021-05-07 | 安徽鑫亿成精密机械有限公司 | Machine tool machining auxiliary system with automatic material ejecting, feeding and discharging functions |
| CN113458426A (en) * | 2021-07-22 | 2021-10-01 | 中国航发哈尔滨轴承有限公司 | Method for machining and forming miniature bearing at one time |
| CN113996828A (en) * | 2021-11-29 | 2022-02-01 | 浙江金火科技实业有限公司 | Self-adjusting chuck for numerical control machine tool and production process thereof |
-
2020
- 2020-02-28 CN CN202020232304.1U patent/CN212122391U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757012A (en) * | 2021-01-27 | 2021-05-07 | 安徽鑫亿成精密机械有限公司 | Machine tool machining auxiliary system with automatic material ejecting, feeding and discharging functions |
| CN113458426A (en) * | 2021-07-22 | 2021-10-01 | 中国航发哈尔滨轴承有限公司 | Method for machining and forming miniature bearing at one time |
| CN113996828A (en) * | 2021-11-29 | 2022-02-01 | 浙江金火科技实业有限公司 | Self-adjusting chuck for numerical control machine tool and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212122391U (en) | Chuck for numerical control machine tool for machining self-locking nut | |
| KR100528366B1 (en) | Clamping device | |
| CN103659391B (en) | Taper shank automatic clamping device | |
| CN102059569A (en) | Clamping chuck for automatic lathe | |
| CN113492258A (en) | Spline shaft fork friction welding universal fixture | |
| CN214921130U (en) | Clamp for step shallow hole gear | |
| CN213561190U (en) | High-precision thin-wall pipe fitting optimization machining clamp | |
| KR20090003230U (en) | Welding stud machine | |
| CN111300115B (en) | Magnetic material puller | |
| CN214392373U (en) | Novel cutting clamp | |
| CN212042721U (en) | Internal expansion clamping head adaptable to clamping of different inner holes | |
| US6290241B1 (en) | Fixed-length collet chuck assembly | |
| CN109822377B (en) | Intermediate shaft machining machine head and machining machine tool using same | |
| US6145185A (en) | Method for forming a connecting pipe of a high pressure connector for fluid | |
| CN111266616A (en) | Outer expansion chuck adaptable to different excircle clamping | |
| CN212095294U (en) | Quick centering device of conical socket joint | |
| CN215846125U (en) | Hobbing clamp for small inner hole workpiece | |
| CN218015873U (en) | Internal stay anchor clamps suitable for hollow tubular shaft spare | |
| CN109822288A (en) | The wedge surface clamped-in style cushion device of pipeline welding | |
| CN218927090U (en) | Grabbing device suitable for tubular work piece | |
| KR200481305Y1 (en) | air blow finger chuck | |
| CN211707748U (en) | Clamping tool for extruding shaft rod | |
| CN220782486U (en) | Frock clamp for gear | |
| CN210010476U (en) | Back-pull type expansion collet chuck | |
| JP2002263922A (en) | Work extruding device in spindle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |