CN110976923A - Centre, centre clamp holder and centre automatic switching device - Google Patents

Centre, centre clamp holder and centre automatic switching device Download PDF

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Publication number
CN110976923A
CN110976923A CN201911308028.0A CN201911308028A CN110976923A CN 110976923 A CN110976923 A CN 110976923A CN 201911308028 A CN201911308028 A CN 201911308028A CN 110976923 A CN110976923 A CN 110976923A
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CN
China
Prior art keywords
tip
centre
clamping
jaw chuck
sleeve
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Granted
Application number
CN201911308028.0A
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Chinese (zh)
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CN110976923B (en
Inventor
余辉
汤秀清
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Guangzhou Haozhi Electromechanical Co Ltd
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Guangzhou Haozhi Electromechanical Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Guangzhou Haozhi Electromechanical Co Ltd filed Critical Guangzhou Haozhi Electromechanical Co Ltd
Priority to CN201911308028.0A priority Critical patent/CN110976923B/en
Publication of CN110976923A publication Critical patent/CN110976923A/en
Application granted granted Critical
Publication of CN110976923B publication Critical patent/CN110976923B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B23/00Tailstocks; Centres
    • B23B23/005Tailstocks; Centres the centres being adjustable

Abstract

The invention discloses a centre, which comprises a centre body and a connecting assembly, wherein a positioning part is arranged on the surface of the centre body, and the connecting assembly is arranged at one end of the centre body and comprises a plurality of taper sleeves with different diameters. The invention also discloses a tip holder which comprises a holding sleeve, a clamping mechanism and a tip, wherein the holding sleeve is provided with an accommodating chamber for bearing the tip, and the clamping mechanism is used for fixing the tip. The invention also discloses a tip automatic switching device, which comprises a first lathe spindle, a second lathe spindle, a milling spindle and a tip holder, wherein the first lathe spindle is provided with a first three-jaw chuck, the second lathe spindle is provided with a second three-jaw chuck, the milling spindle processes a part and holds the tip holder, and the tip can be mounted and/or dismounted on the first three-jaw chuck or the second three-jaw chuck, so that two ends of the part are respectively held by the tip and the first three-jaw chuck or the second three-jaw chuck. The invention can realize automatic switching of the center, and has high processing efficiency and low labor cost.

Description

Centre, centre clamp holder and centre automatic switching device
Technical Field
The invention relates to machine tool equipment, in particular to a centre, a centre clamp and an automatic centre switching device.
Background
The turning and milling combined machine tool with the double lathe spindles is the latest numerical control combined machine tool developed by machine tools in the world, and can enable a machined part to finish all the working procedures of turning, drilling, milling and the like after one-time clamping and automatic handover, greatly improves the machining efficiency of part production, and also reduces the problem of positioning error caused by multiple times of clamping. For some machining of elongated parts, it is necessary to clamp the part with a three-jaw chuck at one end and a point at the other end. However, the centre requires frequent disassembly and assembly by workers, which greatly reduces the machining efficiency and wastes labor cost. In addition, the existing centre has a single structure, the surface of the main body part of the existing centre is smooth, the existing centre is not beneficial to clamping and fixing, and the taper sleeve on the centre has a fixed structure and can only be matched with a three-jaw chuck with one diameter, so that the practicability of the centre is low. Therefore, a device which is highly practical, can effectively clamp the top clamp and can realize automatic top switching is urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a centre with high practicability.
The other object of the present invention is to provide a tip holder capable of effectively holding a tip.
The invention also aims to provide the automatic centre switching device, which can solve the problem of positioning error caused by clamping the centre for many times, can realize automatic centre switching, and is beneficial to improving the processing efficiency and reducing the labor cost.
One of the purposes of the invention is realized by adopting the following technical scheme:
the tip comprises a tip body and a connecting assembly, wherein a positioning portion is arranged on the surface of the tip body, the connecting assembly is arranged at one end of the tip body, the connecting assembly comprises a plurality of taper sleeves with different diameters, and the taper sleeves are connected in a sleeved mode.
Further, the positioning part is a groove arranged around the circumferential direction of the tip body.
Furthermore, a plurality of taper sleeves are fixed through clamping.
The second purpose of the invention is realized by adopting the following technical scheme:
the centre holder, including clamping sleeve, chucking mechanism and preceding top, be equipped with the accommodation chamber that is used for bearing top on the clamping sleeve, chucking mechanism is used for fixed top, chucking mechanism's setting needs to satisfy: when the clamping mechanism is extruded by the tip body, the clamping mechanism deforms, so that the tip body can enter the accommodating cavity; when the clamping mechanism is not extruded by the tip body, the clamping mechanism can recover deformation, so that the clamping mechanism is matched with the positioning part to fix the tip body in the accommodating cavity.
Further, the clamping mechanism is arranged on the clamping sleeve and is clamped with the positioning part.
Further, the clamping mechanism comprises a jackscrew, a spring and a steel ball, an installation through hole is formed in the clamping sleeve and communicated with the accommodating cavity, the jackscrew is arranged in the installation through hole, one end of the spring is sleeved on one end of the jackscrew, the steel ball is connected with the other end of the spring, and the steel ball is connected with the positioning portion in a clamping mode.
Further, the tip holder further comprises a pressing mechanism for fixing the tip, and the setting of the pressing mechanism needs to satisfy: when the pressing mechanism is propped by the tip body, the pressing mechanism deforms, and then acting force in the direction away from the pressing mechanism is applied to the tip body; when the pressing mechanism is not propped by the tip body, the pressing mechanism can restore to deform so as to return to the initial position.
Furthermore, the pressing mechanism comprises a connecting screw, a top block and a compensating spring, the connecting screw is fixed on the clamping sleeve, the top block is sleeved on the connecting screw, and two ends of the compensating spring are respectively connected with the clamping sleeve and the top block.
The third purpose of the invention is realized by adopting the following technical scheme:
the automatic centre switching device comprises a first lathe spindle, a second lathe spindle, a milling spindle and the centre holder, a first three-jaw chuck is arranged on the first lathe spindle, a second three-jaw chuck is arranged on the second lathe spindle, the milling spindle can process parts and clamp the tip clamp holder, the milling spindle can mount and/or dismount the tip on the first three-jaw chuck or the second three-jaw chuck, and can separate/connect the clamping sleeve and the tip, wherein the centre comprises a centre body and a connecting component, the connecting component comprises a plurality of taper sleeves with different diameters, the taper sleeves are detachably connected, thereby enabling the taper sleeve to be connected/disconnected with the first three-jaw chuck or the second three-jaw chuck, so that both ends of the part are respectively clamped by the tip and the first three-jaw chuck or the second three-jaw chuck.
Furthermore, the automatic tip switching device further comprises a tool magazine component, the tool magazine component is arranged on one side of the milling spindle, the tool magazine component can bear a tool and the tip holder, and the holder sleeve is a tool shank sleeve.
Compared with the prior art, the invention has the beneficial effects that:
(1) the automatic switching of the center can be realized. The center holder is integrally placed in the tool magazine, when the device is used, the machine tool can call out the center of the device, the center is installed on a three-jaw chuck of a lathe spindle, and the tool shank sleeve is placed back in the tool magazine. After the tip is used up, the tool shank sleeve can be taken out again, and the tip is retracted into the tool magazine. The centre is switched like the automatic cutter switching, and the tool is convenient and fast.
(2) Accurate installation can be realized. The clamping mechanism and the pressing mechanism are arranged in the structure, so that the machine tool can be installed in place even if the machine tool operates slightly in error, the part machining precision is guaranteed, the machining quality is improved, the tip is prevented from being damaged, and the service life of the tip is prolonged.
(3) The dead center and the movable center can be replaced, and the processing requirements of different parts are met.
(4) The taper sleeves with different diameters are replaced, the processing of parts with different diameters can be met, and the practicability is high.
Drawings
Fig. 1 is a front view of a tip holder according to the present invention;
fig. 2 is an isometric view of a tip holder of the present invention;
fig. 3 is a front view of the tip of the present invention;
FIG. 4 is a front view of a tool holder sleeve according to the present invention;
fig. 5 is a schematic structural view of an automatic tip switching device according to the present invention;
FIG. 6 is a schematic view of the second three-jaw chuck of FIG. 5 in a released condition;
FIG. 7 is a schematic view of the second three-jaw chuck of FIG. 5 in a clamped condition;
in the figure: 1. a tool shank sleeve; 11. a knife handle; 12. steel balls; 13. a spring; 14. carrying out top thread; 15. a compensation spring; 16. a top block; 17. a connecting screw; 2. a tip; 21. an arc groove; 22. a taper sleeve; 3. a first machine tool spindle; 31. a first three-jaw chuck; 4. a second machine spindle; 41. a second three-jaw chuck; 5. milling a main shaft; 51. a cutter; 6. and (4) parts.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1 to 7, the present embodiment discloses a tip 2, which includes a tip body and a connecting assembly, wherein a positioning portion is disposed on a surface of the tip body, the connecting assembly is disposed on one end of the tip body, the connecting assembly includes a plurality of taper sleeves 22 with different diameters, and the taper sleeves 22 are sleeved with each other.
Specifically, the positioning part is a groove arranged around the circumferential direction of the tip body. Preferably, the groove is a circular arc groove 21.
More specifically, the plurality of taper sleeves 22 are fixed by clamping.
In a more preferred embodiment, the two sleeved drogues 22 are further fixed by means of clamping.
On the basis of above-mentioned structure, this embodiment still discloses top 2 holders, including centre gripping cover, chucking mechanism and preceding top 2, be equipped with the accommodation chamber that is used for bearing top 2 on the centre gripping cover, chucking mechanism is used for fixed top 2, and chucking mechanism's setting needs to satisfy: when the clamping mechanism is extruded by the tip body, the clamping mechanism deforms, so that the tip body can enter the accommodating cavity; when the clamping mechanism is not extruded by the tip body, the clamping mechanism can recover deformation, so that the clamping mechanism is matched with the positioning part, and the tip body is fixed in the accommodating cavity.
It should be noted that, the clamping mechanism is arranged on the clamping sleeve and is clamped with the positioning part.
It should be emphasized that the clamping mechanism includes a jackscrew 14, a spring 13 and a steel ball 12, a mounting through hole is provided on the clamping sleeve, the mounting through hole is communicated with the accommodating chamber, the jackscrew 14 is provided in the mounting through hole, one end of the spring 13 is sleeved on one end of the jackscrew 14, the steel ball 12 is connected with the other end of the spring 13, the steel ball 12 is connected with the positioning portion in a clamping manner, that is, the steel ball 12 is connected with the arc groove 21 in a clamping manner.
In the present embodiment, in order to improve the clamping effect of the center 2, the number of the arc grooves 21 may be two or more, and the number of the clamping mechanisms may be matched thereto.
In addition, top 2 holder still includes the hold-down mechanism who is used for fixed top 2, and hold-down mechanism's setting needs to satisfy: when the pressing mechanism is propped by the center body, the pressing mechanism deforms, and then acting force in the direction away from the pressing mechanism is applied to the center body; when the pressing mechanism is not propped by the center body, the pressing mechanism can recover deformation, so that the pressing mechanism returns to the initial position.
It is worth mentioning that the pressing mechanism comprises a connecting screw 17, a top block 16 and a compensating spring 15, the connecting screw 17 is fixed on the clamping sleeve, the top block 16 is sleeved on the connecting screw 17, and two ends of the compensating spring 15 are respectively connected with the clamping sleeve and the top block 16.
Therefore, when the tip body enters the tool shank sleeve 1, the ejector block 16 is abutted by the front end of the tip body, the compensation spring 15 is compressed, the steel ball 12 is extruded by the tip body, the spring 13 is compressed, when the arc groove 21 on the surface of the tip body moves to the steel ball 12, the steel ball 12 enters the corresponding arc groove 21 under the elastic acting force of the spring 13, the tip body is clamped in the accommodating chamber, and the front end of the tip body is subjected to the acting force which is exerted on the tip body by the ejector block 16 and enables the tip body to be far away from the ejector block 16, so that the tip body can be better fixed on the tool shank sleeve 1.
On the basis of the structure, the embodiment also discloses an automatic tip 2 switching device, which comprises a first lathe spindle 3, a second lathe spindle 4, a milling spindle 5 and a tip 2 holder in front, wherein three-jaw chucks are arranged on the first lathe spindle 3 and the second lathe spindle 4, specifically, a first three-jaw chuck 31 is arranged at one end of the first lathe spindle 3, a second three-jaw chuck 41 is arranged at one end of the second lathe spindle 4, the milling spindle 5 can process a part 6 such as a lathe, a drill and a mill and clamp the tip 2 holder, the milling spindle 5 can mount and/or dismount the tip 2 on the first three-jaw chuck 31 or the second three-jaw chuck 41 and can separate/connect the clamping sleeve from/to the tip 2, wherein the tip 2 comprises a body and a connecting assembly, the connecting assembly comprises a plurality of taper sleeves 22 with different diameters, and the tip 22 can be detachably connected, and the taper sleeve 22 is connected/disconnected with the first three-jaw chuck 31 or the second three-jaw chuck 41, so that both ends of the part 6 are clamped by the center 2 and the first three-jaw chuck 31 or the second three-jaw chuck 41, respectively.
Preferably, the automatic center 2 switching device further includes a tool magazine component, the tool magazine component is disposed on one side of the milling spindle 5, and the tool magazine component can bear the tool 51 and the center 2 holder, in this embodiment, the holder sleeve is a tool shank sleeve 1, specifically, the tool shank sleeve 1 includes a tool shank 11 and a sleeve body, and the tool shank 11 and the sleeve body can be manufactured in an integrally formed manner. The pressing mechanism is arranged on the knife handle 11, the accommodating chamber is formed on the sleeve body, and the clamping mechanism is further arranged on the sleeve body.
As shown in figure 1, the invention is provided with a tool holder sleeve 1 with a clamping mechanism, a tip 2 with a circular groove and taper sleeves 22 with different diameters. The centre 2 is placed in the tool holder sleeve 1, as shown in fig. 5, the milling spindle 5 clamps the tool holder 11, the centre 2 and the tool holder sleeve 1 are placed in the tool magazine part, and the tool 51 is switched normally in the whole operation. When the machining is to be carried out, the tip 2 and the tool holder sleeve 1 are automatically taken out from the tool magazine component by the milling spindle 5 of the machine tool, then the tip 2 is sent to a second three-jaw chuck 41 on a second lathe spindle 4, the taper sleeve 22 at the tail end of the tip 2 is clamped by the second three-jaw chuck 41 to realize the fixation of the tip 2, finally the tool holder sleeve 1 is drawn out to separate the tip 2 from the tool holder sleeve 1, and the tool holder sleeve 1 is put back into the tool magazine component, so that the tip 2 is installed on the second lathe spindle 4. After the process is finished, the part 6 of the first lathe shaft needs to be replaced to the second lathe spindle 4, the first three-jaw chuck 31 is used for clamping to continue the process, and the center 2 is replaced from the second lathe shaft to the first lathe spindle 3 and is clamped by the first three-jaw chuck 31. At the moment, the milling spindle 5 firstly withdraws the tip 2 on the second lathe spindle 4 into the cutter handle sleeve 1, the second three-jaw chuck 41 of the second lathe spindle 4 automatically hands over the part 6 of the first lathe spindle 3, and then the tip 2 is installed on the first lathe spindle 3, so that the part 6 is handed over from the second three-jaw chuck 41 of the second lathe spindle 4 to the first lathe spindle 3 and continues to be processed, the whole process does not need manual participation, the automatic switching of the tip 2 can be realized, the automation degree is higher, the problem of positioning error caused by repeatedly clamping the tip 2 can be solved, the processing efficiency is improved, and the labor cost is reduced.
Therefore, on the basis of the above structure, the present embodiment is configured by:
1. with handle of a knife 11 and top 2 structural bonding, adopt lathe to change top 2 of automatic change of mode of cutter 51, the structure is light and handy, and it is more swift to change top 2 manually relatively, reduces the human cost, greatly improves production efficiency.
2. The pressing mechanism consisting of the connecting screw 17, the compensating spring 15 and the ejector block 16 is adopted, so that the positioning error can be compensated, and the tip body can be pressed tightly. As shown in fig. 1, the compensation spring 15 and the top block 16 can be pushed to the front end of the top tip body, as shown in fig. 6 and 7, when the milling spindle 5 is provided with the top tip 2, the corresponding three-jaw chuck is loosened, the tail end face of the top tip 2 is leaned on the three-jaw chuck, and on one hand, the pressing mechanism can buffer the force generated when the milling spindle is too close to the three-jaw chuck due to inaccurate positioning; on the other hand, the centre 2 is tightly pressed, so that the centre 2 is tightly attached to the three-jaw chuck, and the position precision of the centre 2 in the clamping process is ensured.
3. The clamping mechanism consisting of the steel ball 12, the spring 13, the jackscrew 14 and the arc groove 21 on the surface of the tip body is adopted, as shown in figures 1 and 3, so that the tool holder sleeve 1 can conveniently pick and place the tip 2, and the tool holder sleeve can be ensured not to fall off in the moving process. In addition, the clamping force of the steel ball 12 can be adjusted by adjusting the jackscrew 14, which is beneficial to improving the clamping effect of the centre 2.
4. The taper sleeves 22 with different diameters are adopted, so that flexible switching is facilitated, and adaptability is high. In this embodiment, the second three-jaw chuck 41 of the second lathe spindle 4 clamps the parts 6 with different diameters, because the stroke of the second three-jaw chuck 41 is small, the clamping range is small, the parts 6 with different diameters determine the clamping range of the three-jaw chuck, and the tail cone of the center 2 adopts the switchable taper sleeve 22, so that different clamping ranges can be met, and certain flexibility is achieved.
In conclusion, the center 2 can be automatically switched, the center automatic changing device is mainly applied to the automatic center changing 2 of the main shaft turning and milling composite machine tool of the double-lathe, and has the characteristics of convenience, quickness and the like. The center 2 can be quickly and automatically replaced, so that the slender part 6 can be efficiently machined, the production efficiency is improved, and the labor cost is saved.
Compared with the prior art, the invention has at least the following beneficial effects:
1) automatic switching of the center 2 can be realized. The centre 2 holder is integrally placed in the tool magazine, when in use, the machine tool can take out the centre 2 of the device, install the centre on a three-jaw chuck of a lathe spindle, and place the tool holder sleeve 1 back in the tool magazine. After the tip 2 is used up, the tool holder sleeve 1 can be taken out again, and the tip 2 is retracted into the tool magazine. The centre 2 is switched like the automatic cutter switching tool 51, which is convenient and fast.
2) Accurate installation can be realized. The clamping mechanism and the pressing mechanism are arranged in the structure, so that the part 6 can be installed in place even if the machine tool operates with a slight error, the machining precision of the part is guaranteed, the machining quality is improved, meanwhile, the tip 2 is prevented from being damaged, and the service life of the tip 2 is prolonged.
3) The dead center 2 and the live center 2 can be replaced, and the processing requirements of different parts 6 are met.
4) The taper sleeves 22 with different diameters can be replaced, the processing of parts 6 with different diameters can be met, and the practicability is high.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. The top, its characterized in that: the connecting component comprises a plurality of taper sleeves with different diameters, and the taper sleeves are sleeved with one another.
2. A tip as claimed in claim 1, wherein: the positioning part is a groove arranged around the circumferential direction of the tip body.
3. A tip as claimed in claim 1 or 2, wherein: and the taper sleeves are fixed through clamping.
4. The centre holder is characterized in that: the centre comprises a clamping sleeve, a clamping mechanism and a centre according to any one of claims 1 to 3, wherein an accommodating chamber for bearing the centre is arranged on the clamping sleeve, the clamping mechanism is used for fixing the centre, and the arrangement of the clamping mechanism needs to satisfy the following requirements: when the clamping mechanism is extruded by the tip body, the clamping mechanism deforms, so that the tip body can enter the accommodating cavity; when the clamping mechanism is not extruded by the tip body, the clamping mechanism can recover deformation, so that the clamping mechanism is matched with the positioning part to fix the tip body in the accommodating cavity.
5. The tip holder of claim 4, wherein: the clamping mechanism is arranged on the clamping sleeve and is clamped with the positioning part.
6. The tip holder of claim 5, wherein: the clamping mechanism comprises a jackscrew, a spring and a steel ball, an installation through hole is formed in the clamping sleeve and communicated with the accommodating cavity, the jackscrew is arranged in the installation through hole, one end of the spring is sleeved on one end of the jackscrew, the steel ball is connected with the other end of the spring, and the steel ball is connected with the positioning portion in a clamping mode.
7. A tip holder according to any one of claims 4 to 6, wherein: the centre clamp holder further comprises a pressing mechanism for fixing the centre, and the setting of the pressing mechanism needs to meet the following requirements: when the pressing mechanism is propped by the tip body, the pressing mechanism deforms, and then acting force in the direction away from the pressing mechanism is applied to the tip body; when the pressing mechanism is not propped by the tip body, the pressing mechanism can restore to deform so as to return to the initial position.
8. The tip holder of claim 7, wherein: the pressing mechanism comprises a connecting screw, a top block and a compensating spring, the connecting screw is fixed on the clamping sleeve, the top block is sleeved on the connecting screw, and two ends of the compensating spring are respectively connected with the clamping sleeve and the top block.
9. Top automatic switching control equipment, its characterized in that: comprising a first machine spindle, a second machine spindle, a milling spindle and a tip holder according to any of claims 4-8, a first three-jaw chuck is arranged on the first lathe spindle, a second three-jaw chuck is arranged on the second lathe spindle, the milling spindle can process parts and clamp the tip clamp holder, the milling spindle can mount and/or dismount the tip on the first three-jaw chuck or the second three-jaw chuck, and can separate/connect the clamping sleeve and the tip, wherein the centre comprises a centre body and a connecting component, the connecting component comprises a plurality of taper sleeves with different diameters, the taper sleeves are detachably connected, thereby enabling the taper sleeve to be connected/disconnected with the first three-jaw chuck or the second three-jaw chuck, so that both ends of the part are respectively clamped by the tip and the first three-jaw chuck or the second three-jaw chuck.
10. The automatic tip changing device according to claim 9, wherein: the automatic tip switching device further comprises a tool magazine component, the tool magazine component is arranged on one side of the milling spindle, the tool magazine component can bear a tool and the tip holder, and the holder sleeve is a tool shank sleeve.
CN201911308028.0A 2019-12-18 2019-12-18 Centre clamp holder and centre automatic switching control equipment Active CN110976923B (en)

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Application Number Priority Date Filing Date Title
CN201911308028.0A CN110976923B (en) 2019-12-18 2019-12-18 Centre clamp holder and centre automatic switching control equipment

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CN110976923A true CN110976923A (en) 2020-04-10
CN110976923B CN110976923B (en) 2021-11-16

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CN2138542Y (en) * 1992-11-26 1993-07-21 颜俊生 Multipurpose fast changing tool clipper
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CN208825567U (en) * 2018-07-02 2019-05-07 东莞理工学院 A kind of carbide-tipped center
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CN209272492U (en) * 2018-11-20 2019-08-20 浙江中智鲸工智能装备有限公司 A kind of telescopic nitrogen is top
CN209407595U (en) * 2018-12-26 2019-09-20 重庆市星极齿轮有限责任公司 A kind of gear hobbing tooling

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