CN210335250U

CN210335250U - Electromagnetic piston type tool changing device

Info

Publication number: CN210335250U
Application number: CN201821976629.XU
Authority: CN
Inventors: 黄海洋; 左斌
Original assignee: Suzhou Vocational University
Current assignee: Suzhou Vocational University
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2020-04-17
Anticipated expiration: 2028-11-28

Abstract

The utility model provides an electromagnetic piston type tool changer, which comprises a tool changing hand for clamping a tool, wherein the tool changing hand comprises a clamping seat, an elastic body, a piston, a supporting piece and an electromagnet; the clamping seat is arranged on the tool changing arm, and a plurality of assembling holes are formed in the peripheral wall of the clamping seat in a penetrating manner; the elastic body, the piston and the electromagnet are sleeved on the clamping seat, the electromagnet keeps fixed relative to the piston, and two ends of the elastic body are elastically abutted against the electromagnet and the piston respectively; the plurality of abutting pieces are respectively and movably arranged in the plurality of assembling holes on the clamping seat and abut against the piston, the clamping of the cutter is completed by a plurality of mutually independent parallel functional parts, the safe operation coefficient is high, the locking mode is changed, and the cutter falling phenomenon can be effectively prevented.

Description

Electromagnetic piston type tool changing device

Technical Field

The utility model relates to a machining center tool changing field, concretely relates to electromagnetism piston tool changing device.

Background

The tool changing device is an important component of a machining center and is used for exchanging tools on the main shaft and tools in the tool magazine so as to realize the function of automatic tool changing. At present, a tool changing hand for clamping a tool in a tool changing device generally adopts a spring pin type clamping mode, and the principle of the clamping mode is that a movable pin and a locking pin are pushed by a spring to clamp and lock the tool. The tool changing hand generally has the following defects in the use process: (1) the tool is clamped and locked by only one movable pin, the movable pin cannot work normally if the movable pin fails, and the safe operation coefficient of the equipment is not high; and (2) the locking of the cutter is realized by pushing the locking pin by the spring, and if the elasticity is insufficient due to aging, breakage and the like of the spring of the locking pin, the cutter cannot be locked easily, and the cutter falls.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides an electromagnetism piston toolchanger, this electromagnetism piston toolchanger tool changing in-process, the centre gripping of cutter is accomplished by a plurality of mutually independent parallel function parts, and the safe operating coefficient is high, and has changed the locking mode, can effectively prevent to fall the sword phenomenon.

The utility model adopts the following technical scheme:

an electromagnetic piston type tool changer comprises a tool changing hand for clamping a tool, wherein the tool changing hand comprises a clamping seat, an elastic body, a piston, a butting piece and an electromagnet;

the clamping seat is arranged on the tool changing arm, and a plurality of assembling holes are formed in the peripheral wall of the clamping seat in a penetrating manner;

the elastic body, the piston and the electromagnet are sleeved on the clamping seat, the electromagnet keeps fixed relative to the piston, and two ends of the elastic body are elastically abutted against the electromagnet and the piston respectively;

the plurality of abutting pieces are respectively and movably arranged in the plurality of assembling holes on the clamping seat and abut against the piston.

Preferably, two ends of the tool changing arm are respectively provided with a clamping hole in a through manner, and the clamping seat is arranged in the clamping hole.

Preferably, the electromagnet comprises an iron core and a coil, the coil is electrically connected with an external direct current power supply, and a substantially linear corresponding relation exists between the current passing through the coil and the force required for compressing the elastic body.

Preferably, the elastic body is a helical compression spring made of a non-ferromagnetic material.

Preferably, the elastomer is a disc spring made of a non-ferromagnetic material.

Preferably, the electromagnet is annular, and the electromagnet is clamped in the groove of the clamping seat.

Preferably, the electromagnet is annular, and the electromagnet is clamped in the groove of the clamping hole.

Preferably, the abutting piece is a steel ball.

Preferably, the piston is made of ferromagnetic material and is annular.

Preferably, the assembly hole is provided with a shape with a large inner opening and two through sides, two ends of the abutting piece can extend out of two outer sides of the assembly hole, and the abutting piece cannot be pulled out of the assembly hole.

Compared with the prior art, the beneficial effects of the utility model are that: the plurality of abutting pieces are respectively and movably arranged in the plurality of assembling holes on the clamping seat, when a cutter needs to be clamped, the electromagnet is electrified to generate a magnetic field, the piston is attracted to overcome the elastic force of the elastic body to push the abutting pieces to clamp the cutter, the cutter is clamped and locked by the plurality of abutting pieces, the abutting pieces act independently, the entire cutter changing device cannot work normally when the individual abutting pieces break down, and the safe operation coefficient of the equipment is high; meanwhile, the locking action of the cutter is realized by the driving of the electromagnet, and the phenomena that the cutter cannot be locked and the cutter falls off due to the aging, the breakage and other reasons of the spring can be effectively avoided.

Drawings

Fig. 1 is an overall structural schematic diagram of an electromagnetic piston type tool changer according to an embodiment of the present invention.

Fig. 2 is a partially enlarged cross-sectional structural view of a portion a corresponding to fig. 1.

Description of reference numerals:

tool changing arm: 1

Tool changing hand: 2

A clamping seat: 21 assembling holes: 211

Elastomer: 22, piston: 23

The abutting piece: 24 electromagnet: 25.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Please refer to fig. 1 and fig. 2 in combination. The utility model relates to an electromagnetism piston tool changer, as shown in figure 1, including tool changing arm 1 and tool changing hand 2, two tool changing hands 2 are located the both ends of tool changing arm 1 respectively, and tool changing hand 2 is used for the centre gripping cutter. Two ends of the tool changing arm 1 are respectively provided with a clamping hole in a through way, and tool changing hands 2 are arranged in the two clamping holes.

As shown in fig. 2, the tool changing hand 2 includes a holder 21, an elastic body 22, a piston 23, a retainer 24, and an electromagnet 25. The clamping seat 21 is of a T-shaped structure, and the clamping seat 21 is supported and fixed in a clamping hole of the tool changing arm 1 through an annular flange with a larger diameter at the upper end of the clamping seat. A plurality of assembling holes 211 are formed through the peripheral wall of the lower part of the clamping seat 21, and the assembling holes 211 are distributed around the clamping seat at the same height of the peripheral wall of the clamping seat 21. Each assembling hole 211 is movably provided with a holding member 24, in this embodiment, the holding member 24 is a steel ball. Because the assembly hole 211 is a shape with a large inner opening and two through sides, two ends of the holding piece 24 can extend out of two outer sides of the assembly hole 211, but the holding piece 24 cannot be separated from the assembly hole 211, so that the holding piece 24 can move left and right in a certain range relative to the clamping seat 21.

The elastic body 22, the piston 23 and the electromagnet 24 are all sleeved on the periphery of the clamping seat 21. Wherein, the two ends of the elastic body 22 respectively elastically abut against the electromagnet 24 and the piston 23, and the piston 23 can move up and down under the guidance of the clamping seat 21.

The electromagnet 24 is annular and comprises an annular iron core and a coil wound on the iron core, the electromagnet 24 can be clamped in a groove of the clamping seat 21 through the iron core, or can be clamped in a groove of a clamping hole of the tool changing arm 1, the purpose of the electromagnet is to keep the electromagnet 24 at a fixed position relative to the piston 23, when the coil is connected with an external direct current power supply, the electromagnet 24 generates a magnetic field which can attract the piston 23, the piston 23 can move upwards against the elastic force of the elastic body 22, and the approximate linear corresponding relation exists between the current passing through the coil and the force required for compressing the elastic body 22, namely, the larger the current in the coil is, the larger the generated magnetic field intensity is, and the larger the attraction force on the piston 23 is.

The piston 23 is sleeved on the clamping seat 21, the upper end of the piston 23 abuts against the elastic body 22 and the abutting piece 24, and the lower end of the piston 23 abuts against the tool changing arm 1 under the elastic force of the elastic body 22. To ensure the attraction effect of the electromagnet 25 to the piston 23, the piston 23 may be made of ferromagnetic material and be annular in shape.

In addition, in order to avoid the magnetic field of the electromagnet 25 from adversely affecting the elastic body 22, the elastic body 22 may be made of a non-ferromagnetic material that is not affected by the magnetic field, and the elastic body 22 may be a helical compression spring or a disc spring.

The working principle of the electromagnetic piston type tool changer is that when the tool does not need to be clamped, current does not flow in a coil of the electromagnet 25, the electromagnet 25 does not generate a magnetic field, at the moment, the piston 23 is positioned at the lowest part under the action of the elastic force of the elastic body 22, the piston 23 does not extrude the abutting piece 24, the abutting piece 24 can freely move left and right in the assembling hole 211, and the tool can smoothly enter the inner cavity of the clamping seat 21 or exit from the inner cavity of the clamping seat 21; when the tool needs to be clamped, the positions of the clamping groove of the tool and the abutting piece 24 correspond to each other, current is conducted in a coil of the electromagnet 25, the electromagnet 25 generates a magnetic field, the magnetic field attracts the piston 23, the piston 23 overcomes the elastic force of the elastic body 22 to move upwards and gradually extrude the abutting piece 24, the abutting piece 24 moves towards the clamping groove of the tool under the extrusion of the piston 23, and the clamping of the tool is realized.

Compared with the prior art, the cutter is clamped and locked by the plurality of abutting pieces 24, the abutting pieces 24 act independently, the failure of the individual abutting pieces 24 does not cause the normal work of the whole cutter changing device, and the safe operation coefficient of the equipment is high. Meanwhile, the locking action of the cutter is realized by the driving of the electromagnet 25, so that the phenomena that the cutter cannot be locked and falls off due to the aging, the breakage and the like of the spring can be effectively avoided.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. An electromagnetic piston type tool changer comprises a tool changing hand for clamping a tool, and is characterized in that the tool changing hand comprises a clamping seat, an elastic body, a piston, a butting piece and an electromagnet;

2. The electromagnetic piston type tool changer of claim 1, wherein a clamping hole is formed through each of two ends of the tool changing arm, and the clamping seat is mounted in the clamping hole.

3. The electromagnetic piston tool changer of claim 1, wherein the electromagnet comprises an iron core and a coil, the coil is in electrical communication with an external dc power source, and there is a substantially linear correspondence between the current through the coil and the amount of force required to compress the elastomer.

4. The electromagnetic piston tool changer of claim 1, wherein the elastomer is a helical compression spring made of a non-ferromagnetic material.

5. The electromagnetic piston tool changer of claim 1, wherein the elastomer is a belleville spring made of a non-ferromagnetic material.

6. The electromagnetic piston tool changer of claim 1, wherein the electromagnet is ring-shaped and the electromagnet is captured in a groove of the holder.

7. The electromagnetic piston tool changer of claim 2, wherein the electromagnet is ring-shaped and the electromagnet is captured in a groove of the gripping bore.

8. The electromagnetic piston tool changer of claim 5, wherein the abutment is a steel ball.

9. The electromagnetic piston type tool changer of claim 1, wherein the piston is made of ferromagnetic material and is annular.

10. The electromagnetic piston type tool changer according to claim 1, wherein the fitting hole is formed in a shape in which both sides having a large inside diameter and a small inside diameter are penetrated, both ends of the abutting member are allowed to protrude to both outside sides of the fitting hole, and the abutting member is prevented from coming out of the fitting hole.