CN211728309U - Bridge plate exchange device and machining center - Google Patents

Abstract

The utility model provides a bridge plate exchange device, relates to the machining center field, includes: an outer bridge plate which is mounted on a support mechanism on the exchange and can be separated from the support mechanism up and down; the inner bridge plate is fixed and separated up and down through a locking mechanism below the inner bridge plate; the lifting and rotating mechanism is fixed with an exchange arm, and the exchange arm can lift and rotate at least 180 degrees in a horizontal plane; the two ends of the exchange arm are provided with clamping and embedding structures which are matched and used for mutually and movably connecting with the external bridge plate and the internal bridge plate; before the exchange of the external bridge plate and the internal bridge plate, the clamping and embedding structure at one end of the exchange arm close to the external bridge plate is positioned right below the clamping and embedding structure on the external bridge plate, and the axis of the rotating shaft of the lifting rotating mechanism and the midpoint of the exchange arm are on the same vertical line. The application provides a bridge plate exchange device, which can realize automatic replacement of a bridge plate and improve the processing efficiency; this application still provides simultaneously a machining center including above-mentioned bridge plate exchange device.

Description

Bridge plate exchange device and machining center

Technical Field

The utility model relates to a machining center field, concretely relates to bridge plate exchange device and machining center.

Background

In the existing machining center, the size of a workpiece machined on the bridge plate is not large, so that the machining time is short generally, and the time occupied by clamping the workpiece onto the bridge plate is large in the whole machining process, so that the machining efficiency is greatly reduced.

In addition, in many practical situations, the two ends of the bridge plate are connected and mounted on some mechanical structures, which form a barrier to the bridge plate from the two ends, such as a numerical control turntable and a disk tailstock, where the two ends of the bridge plate are mounted in a machining center, and the bridge plate is sandwiched between the numerical control turntable and the disk tailstock, some existing exchange mechanisms are not suitable when facing the bridge plate exchange problem in such a situation, and are specifically as follows:

1. shuttle type (reciprocating type)

The exchange platform is provided with two groups of parallel rails and two sets of driving devices, and the workbench needing to be exchanged translates on the rails. One set of driving mechanism firstly drags the working table out along the rail, and then the other set of driving mechanism pushes the working table in the machine along the other set of rail. And one out and one in completes the workbench exchange. The two tables are operated separately rather than simultaneously.

2. Rotary double fork

This is the most common one at present, faster and more stable than the reciprocating exchange, where the exchange has a double-fork (double U) rotating carriage, where one U-fork is located within the table stroke range. When the exchange is needed, the working tables reach the designated positions in the U-shaped forks, the lifting mechanism in the exchange table drives the brackets to lift the two working tables simultaneously, the rotating mechanism drives the brackets to rotate 180 degrees to change the positions of the working tables, and then the brackets fall down to complete the exchange.

3. Rotary hook type

The exchange mode is that the exchange platform is provided with a double-end hook plate, the side surfaces of the two working platforms are provided with grooves, and when the exchange is needed, the hook plate picks up the working platforms from the side edges of the two working platforms. The workbench exchange is completed under the driving of the lifting device and the rotating device in the exchange platform. For example, publication number CN106670830A, named: the invention relates to a Chinese authorization invention of a transverse workbench exchange rack.

Due to structural limitation, the exchange mechanisms are all used for exchanging the workbench, and no object is blocked around the workbench, and only the bottom of the workbench is connected with the machine tool main body; in the case of the replacement of the bridge plate with the barriers at both ends of the bridge plate as described above, the above-mentioned exchange mechanism interferes with the barriers and is obviously not usable.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the problems that exist among the above-mentioned prior art at least, this application provides a bridge plate exchange device, realizes that the bridge plate is automatic to be changed, can improve machining efficiency, more is fit for the automatic change under the bridge plate both ends have the circumstances of blockking.

In order to realize the technical effect, the utility model discloses a concrete technical scheme as follows:

a bridge plate exchange apparatus comprising:

an outer bridge plate above the exchange table, the outer bridge plate being mounted to and vertically separable from the support mechanism on the exchange table;

the machine inner bridge plate can move horizontally above the machine tool base and is fixed and separated up and down through a locking mechanism below the machine inner bridge plate; the external bridge plate and the internal bridge plate are used for clamping workpieces;

the lifting and rotating mechanism between the outer bridge plate and the inner bridge plate is fixed with an exchange arm which can lift and rotate at least 180 degrees in the horizontal plane under the action of the lifting and rotating mechanism; the two ends of the exchange arm are provided with clamping and embedding structures which are matched and used for mutually and movably connecting with the external bridge plate and the internal bridge plate;

before the exchange of the external bridge plate and the internal bridge plate, the clamping and embedding structure at one end of the exchange arm close to the external bridge plate is positioned right below the clamping and embedding structure on the external bridge plate, and the axis of the rotating shaft of the lifting rotating mechanism and the midpoint of the exchange arm are on the same vertical line. Wherein the midpoint of the exchange arm refers to the midpoint or middle line in the length direction of the exchange arm.

Furthermore, two ends of the inner bridge plate are provided with blocking structures for preventing the exchange arm from rotating to pass through.

Furthermore, the blocking structure is at least two locking mechanisms which are distributed on two sides below the inner axle plate. The locking mechanism has the functions of fixing and loosening the inner bridge plate, and prevents the exchange arm from rotating to pass through when being distributed on two sides below the inner bridge plate.

Furthermore, the blocking structure comprises a numerical control rotary table and a disc tailstock, and the numerical control rotary table and the disc tailstock are respectively connected with two ends of the inner bridge plate. The numerical control rotary table and the disc tailstock form a structure for preventing the exchange arm from rotating and passing through, the numerical control rotary table is matched with the disc tailstock to enable the inner bridge plate to rotate by 360 degrees, workpieces clamped on the inner bridge plate can be machined in multiple faces, and the structure is applied to machining centers.

Further, the clamping and embedding structures on the inner bridge plate are located between the blocking structures at two ends of the inner bridge plate.

Furthermore, the clamping structure comprises grooves arranged at two ends of the exchange arm, protrusions correspondingly arranged on the inner bridge plate and the outer bridge plate or protrusions arranged at two ends of the exchange arm, and grooves correspondingly arranged on the inner bridge plate and the outer bridge plate.

Furthermore, the supporting mechanism is two supporting plates or two support columns or two supports distributed on two sides of the exchange platform, and the external bridge plate is lapped on the two supporting plates or the two support columns or the two supports.

Furthermore, locking mechanical system includes fixed pin, hydraulic pressure locking device, and this fixed pin is fixed in the built-in axle board bottom, and hydraulic pressure locking device is for playing the device of pinning, loosening the fixed pin with the fixed pin adaptation.

Simultaneously, this application still provides a vertical machining center, includes above-mentioned bridge plate exchange device, locates the stand of lathe base one side, installs the vertical main shaft of one or more than two on this stand.

Simultaneously, this application still provides a horizontal machining center, includes above-mentioned bridge plate exchange device, locates the stand of lathe base one side, installs the horizontal main shaft of one or more than two on this stand.

The bridge plate exchange device has the following specific working process:

after the workpiece on the inner bridge plate is machined, the inner bridge plate horizontally approaches the exchange arm until the clamping structure at one end of the exchange arm far away from the outer bridge plate is positioned right below the clamping structure on the inner bridge plate, wherein mechanisms such as the inner bridge plate and the blocking part on the base of the machine tool cannot interfere with the exchange arm in the whole workpiece machining process, then the exchange arm is lifted upwards under the action of the lifting and rotating mechanism, so that the bulges of the inner bridge plate and the outer bridge plate enter the grooves at the two ends of the exchange arm, the two ends of the exchange arm are movably fixed with the outer bridge plate and the inner bridge plate, then the hydraulic locking device releases the fixing pin, the exchange arm drives the inner bridge plate and the outer bridge plate to continuously rise to the outer height, at the moment, the fixing pin is completely separated from the hydraulic locking device, then the exchange arm rotates 180 degrees, the positions of the inner bridge plate and the outer bridge plate are exchanged, and the inner bridge plate where the machined workpiece is positioned is moved to, the outer bridge plate where the blank is located is moved into the machine, then the exchange arm begins to descend to enable the original inner bridge plate to fall on the supporting plate, meanwhile, the fixing pin below the original outer bridge plate is inserted into the hydraulic locking device, after the fixing pin is locked by the hydraulic locking device, the exchange arm continues to descend to the original height, the protrusions of the original inner bridge plate and the original outer bridge plate are completely separated from the grooves at the two ends of the exchange arm, and therefore the whole process of replacing the bridge plate is completed.

If the ascending stroke of the rotating shaft of the lifting and rotating mechanism is limited, the ascending height of the exchange arm with the inner bridge plate and the outer bridge plate is lower than the height of the numerical control rotary table and the height of the disc tailstock after the inner bridge plate and the outer bridge plate are lifted, at the moment, the numerical control rotary table and the disc tailstock need to move in the direction away from the exchange table to avoid interference, and then the exchange arm returns to the bridge plate exchange position; if the lifting stroke of the rotating shaft of the lifting and rotating mechanism is large enough, the lifting height of the exchange arm, the inner bridge plate and the outer bridge plate exceeds the height of the numerical control turntable and the disc tailstock, the numerical control turntable and the disc tailstock can directly rotate and exchange without moving to a position far away from the exchange platform.

According to the technical scheme, the utility model discloses can realize the automatic change of built-in bridge plate, outer bridge plate, especially have the bridge plate automatic change under the circumstances of blockking at bridge plate (at least for one in built-in bridge plate, the outer bridge plate) both ends, through the good work piece of clamping in advance on the bridge plate outside the machine, after the work piece processing on the machining center has been accomplished, through the utility model discloses the device accomplishes the automatic change of built-in bridge plate, outer bridge plate, alright directly continue to carry out work piece processing, and the processing efficiency has been improved greatly in cycles.

Drawings

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

Fig. 1 is a schematic structural diagram of a bridge plate exchange device in the present invention;

FIG. 2 is a schematic view of the connection of the inner bridge plate, the locking mechanism, the exchange arm and the disk tailstock;

FIG. 3 is another schematic view of the locking mechanism of the present invention;

FIG. 4 is a schematic view of the groove at the two ends of the exchange arm of the present invention under the protrusion;

fig. 5 is a schematic view of a vertical machining center according to the present invention;

fig. 6 is a schematic view of a horizontal machining center according to the present invention;

wherein, 1, an exchange platform; 2. an external bridge plate; 3. a machine tool base; 4. an inner bridge plate; 5. a workpiece; 6. a platform; 7. a saddle; 8. a lifting and rotating mechanism; 9. an exchange arm; 10. a groove; 11. a protrusion; 12. a support plate; 13. a fixing pin; 14. a hydraulic locking device; 15. a jack; 16. a guide rail; 17. a slider; 18. an oil cylinder; 19. a numerical control turntable; 20. a disc tailstock; 21. an L-shaped connecting plate; 22. a taper sleeve; 221. pulling nails; 23. a tapered pin; 231. a central bore; 24. a column; 25. a vertical guide rail; 26. a vertical spindle box; 27. a vertical main shaft; 28. a horizontal main spindle box; 29. a horizontal main shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present embodiments more clear, the technical solutions in the present embodiments will be described clearly and completely below with reference to the accompanying drawings in the present embodiments, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present application.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example one

The embodiment provides an automatic bridge plate exchange device, which has the following technical scheme:

referring to fig. 1, a bridge plate exchange apparatus includes:

an outer bridge plate 2 above the exchange board 1, the outer bridge plate 2 being mounted to and vertically separable from a support mechanism on the exchange board 1;

an inner bridge plate 4 which can move horizontally is arranged above the machine tool base 3, and the inner bridge plate 4 is fixed and separated up and down through a locking mechanism below the inner bridge plate 4; the external bridge plate 2 and the internal bridge plate 4 are used for clamping a workpiece 5; the internal bridge plate 4 is arranged above the machine tool base 3, and realizes horizontal movement and horizontal movement in which directions, and the part of the structure is arranged between the internal bridge plate 4 and the machine tool base 3, firstly, the part of the structure is irrelevant to the technical problem to be solved by the utility model, whether the part of the structure is disclosed or not does not influence the specific implementation of the technical scheme, secondly, the part of the structure adopts the prior art, and is a known technology for ordinary technicians in the industry, for example, the internal bridge plate 4 and the locking mechanism are fixedly arranged on the platform 6, the platform 6 is arranged on the saddle 7 and realizes movement through a guide rail, a motor and a screw rod on the saddle 7, and the saddle 7 is arranged on the machine tool base 3 and realizes movement through the guide rail, the motor and the screw rod on the machine tool base 3;

the lifting and rotating mechanism 8 is arranged between the outer bridge plate 2 and the inner bridge plate 4, wherein the lifting and rotating mechanism 8 is a product in the prior art, the rotating shaft of which can realize lifting and rotating, and the mounting position of the lifting and rotating mechanism 8 is not limited, and the lifting and rotating mechanism can be mounted on the machine tool base 3 (for example, a section extending outside the machine tool base 3 and not interfering with machining) and also can be mounted on the exchange platform 1, and the lifting and rotating mechanism is preferably mounted on the exchange platform 1 in the embodiment;

an exchange arm 9 is fixed on the lifting and rotating mechanism 8, and the exchange arm 9 can lift and rotate at least 180 degrees in the horizontal plane under the action of the lifting and rotating mechanism 8; the two ends of the exchange arm 9, the external bridge plate 2 and the internal bridge plate 4 are provided with adaptive clamping and embedding structures for mutual movable connection;

before the exchange of the external bridge plate 2 and the internal bridge plate 4, the clamping and embedding structure at one end of the exchange arm 9 close to the external bridge plate 2 is positioned right below the clamping and embedding structure on the external bridge plate 2, and the axis of the rotating shaft of the lifting rotating mechanism 8 and the middle point of the exchange arm 9 are on the same vertical line.

The clamping and embedding structure comprises grooves 10 arranged at two ends of an exchange arm 9 and protrusions 11 correspondingly arranged on an internal bridge plate 4 and an external bridge plate 2, the protrusions 11 are vertically inserted into the grooves 10 to fix the internal bridge plate 4 and the external bridge plate 2 with the exchange arm 9, the positions of the protrusions 11 are not limited, and can be in the bottom surfaces of the internal bridge plate 4 and the external bridge plate 2 or the side surfaces of the internal bridge plate 4 and the external bridge plate 2, and in order to shorten the stroke of the exchange arm 9, improve the working efficiency and reduce the size of the exchange arm 9, the protrusions 11 are preferably arranged on the side surfaces of the internal bridge plate 4 and the external bridge plate 2; the clamping structure can also adopt other structures for realizing the same function, for example, two ends of the exchange arm are provided with bulges, and the corresponding inner bridge plate and the outer bridge plate are provided with grooves.

The supporting mechanism is two supporting plates 12 distributed on two sides of the exchange platform 1, the outer bridge plate 2 is lapped on the two supporting plates 12, and the two supporting plates 12 can be integrated with the exchange platform 1 or can be independently arranged and then installed on the exchange platform 1; in order to make the external bridge plate 2 on the support plate 12 slightly stable when being lapped, a magnet (magnet) or a metal sheet and the like can be arranged on the support plate 12, the metal sheet or the magnet (magnet) and the like are arranged at the corresponding position of the bottom surface of the external bridge plate 2, and the metal sheet or the magnet (magnet) and the like can also be arranged at the corresponding position of the bottom surface of the internal bridge plate 4; alternatively, the support plate 12 may be replaced with a post or bracket.

Referring to fig. 2, the locking mechanism includes a fixing pin 13 and a hydraulic locking device 14, the fixing pin 13 is fixed at the bottom end of the internal bridge plate 4, in order to complete the replacement of the internal bridge plate 4 and the external bridge plate 2, of course, the fixing pin 13 is also arranged at the same position of the external bridge plate 2, the hydraulic locking device 14 is a device which is adapted to the fixing pin 13 and plays a role in locking and releasing the fixing pin 13, the hydraulic locking device 14 is provided with an insertion hole 15 matched with the fixing pin 13, wherein the hydraulic locking device 14 is a prior art product, for example, a zero point locator of german AMF brand, No.6370EARHA is adopted; the locking mechanism can also adopt other prior art products for realizing the same function, for example, as shown in fig. 3, a taper sleeve 22 is installed at the bottom end of the inner bridge plate 4, a pull nail 221 is arranged at the center of the taper sleeve 22, a taper pin 23 is a device matched with the taper sleeve 22 and used for fixing and releasing the taper sleeve 22, and a pull claw (not shown) is arranged in a center hole 231 of the taper pin 23 and used for pulling the pull nail 221 tightly. When the device works, the taper sleeve 22 at the bottom end of the inner bridge plate 4 falls on the taper pin 23, meanwhile, the rivet 221 in the middle of the taper sleeve 22 is inserted into the central hole 231 of the taper pin 23, the rivet 221 is pulled downwards by the pull claw in the central hole 231, the taper sleeve 22 is tightly combined with the taper pin 23, and hydraulic unlocking is adopted when the taper pin 23 loosens the taper sleeve 22.

Example two

The embodiment particularly provides an automatic bridge plate exchange device under the condition that two ends of a bridge plate are blocked, and the technical scheme is as follows:

as shown in fig. 1, a bridge plate exchange apparatus includes:

an outer bridge plate 2 above the exchange board 1, the outer bridge plate 2 being mounted to and vertically separable from a support mechanism on the exchange board 1;

an inner bridge plate 4 which can move horizontally is arranged above the machine tool base 3, and the inner bridge plate 4 is fixed and separated up and down through a locking mechanism below the inner bridge plate 4; the external bridge plate 2 and the internal bridge plate 4 are used for clamping a workpiece 5; the internal bridge plate 4 is arranged above the machine tool base 3, and realizes horizontal movement and horizontal movement in which directions through which structure, and which structure is arranged between the internal bridge plate 4 and the machine tool base 3, firstly, the part of the content is irrelevant to the technical problem to be solved by the utility model, whether the content is disclosed does not influence the specific implementation of the technical scheme, secondly, the part of the content adopts the prior art, and is a known technology for ordinary technicians in the industry, for example, the internal bridge plate 4 and the locking mechanism are arranged on the platform 6, the platform 6 is arranged on the saddle 7, and the saddle 7 is arranged on the machine tool base 3; the two ends of the inner bridge plate 4 are connected with a numerical control rotary table 19 and a disc tailstock 20, the numerical control rotary table 19 and the disc tailstock 20 prevent the exchange arm 9 from rotating to pass through, a bulge 11 on the inner bridge plate 4 is located between the numerical control rotary table 19 and the disc tailstock 20, the inner bridge plate 4 is specifically connected with the numerical control rotary table 19 and the disc tailstock 20 through L-shaped connecting plates 21 on the two sides, and the numerical control rotary table 19 and the disc tailstock 20 are installed on the platform 6.

The lifting and rotating mechanism 8 is arranged between the outer bridge plate 2 and the inner bridge plate 4, the lifting and rotating mechanism 8 is arranged on the exchange platform 1, an exchange arm 9 is fixed on the lifting and rotating mechanism 8, and the exchange arm 9 can lift and rotate at least 180 degrees in a horizontal plane under the action of the lifting and rotating mechanism 8; the two ends of the exchange arm 9, the external bridge plate 2 and the internal bridge plate 4 are provided with adaptive clamping and embedding structures for mutual movable connection;

before the exchange of the external bridge plate 2 and the internal bridge plate 4, the clamping and embedding structure at one end of the exchange arm 9 close to the external bridge plate 2 is positioned right below the clamping and embedding structure on the external bridge plate 2, and the axis of the rotating shaft of the lifting rotating mechanism 8 and the middle point of the exchange arm 9 are on the same vertical line. At the moment, the exchange arm 9 is at the initial position before the exchange of the external bridge plate 2 and the internal bridge plate 4, and the whole exchange arm 9, especially one end of the exchange arm 9 far away from the external bridge plate 2, cannot interfere with the whole machining process of the machine tool.

The clamping and embedding structure comprises grooves 10 arranged at two ends of the exchange arm 9 and protrusions 11 correspondingly arranged on the inner bridge plate 4 and the outer bridge plate 2, and the protrusions 11 are vertically inserted into the grooves 10 to fix the inner bridge plate 4, the outer bridge plate 2 and the exchange arm 9.

Wherein, the supporting mechanism is two backup pads 12 that distribute in exchange 1 both sides, and outer bridge plate 2 overlap joint is on two backup pads 12. Before the exchange of the external bridge plate 2 and the internal bridge plate 4, when the exchange arm 9 is located at the initial position, one end of the exchange arm 9 close to the external bridge plate 2 is located below the external bridge plate 2 and between the two support plates 12, and at this time, the two support plates 12 not only support the external bridge plate 2, but also form a barrier on two sides of the exchange arm 9, so that the exchange arm 9 cannot rotate to pass through.

As shown in fig. 2, the locking mechanism includes a fixing pin 13 and a hydraulic locking device 14, the fixing pin 13 is fixed at the bottom end of the internal axle plate 4, in order to complete the replacement of the internal axle plate 4 and the external axle plate 2, of course, the fixing pin 13 is also arranged at the same position of the external axle plate 2, the hydraulic locking device 14 is a device which is adapted to the fixing pin 13 and plays a role in locking and releasing the fixing pin 13, the hydraulic locking device 14 is provided with an insertion hole 15 which is matched with the fixing pin 13, wherein the hydraulic locking device 14 is a product of the prior art and is installed on the L-shaped connecting plate 21.

The difference between the first embodiment and the second embodiment lies in that two sides of the inner bridge plate 4 are connected with the numerical control turntable 19 and the disc tailstock 20, and the numerical control turntable 19 and the disc tailstock 20 form a barrier for two sides of the exchange arm 9, and the specific working process is as follows:

as shown in fig. 4, after the workpiece 5 on the inner bridge plate 4 is processed, the inner bridge plate 4 horizontally approaches the exchange arm 9 until the snap-fit structure on the end of the exchange arm 9 far from the outer bridge plate 2 is located right below the snap-fit structure on the inner bridge plate 4, at this time, the inner bridge plate 4 is located between the numerical control turntable 19 and the disc tailstock 20, the exchange table 1 is tightly attached to the outer side of the machine tool base 3, then the exchange arm 9 is lifted upwards, so that the protrusions 11 of the inner bridge plate 4 and the outer bridge plate 2 enter the grooves 10 at the two ends of the exchange arm 9, the two ends of the exchange arm 9 are movably fixed with the outer bridge plate 2 and the inner bridge plate 4, then the hydraulic locking device 14 releases the fixed pin 13, the exchange arm 9 drives the inner bridge plate 4 and the outer bridge plate 2 to continuously rise to a height, at this time, the fixed pin 13 is completely separated from the hydraulic locking device 14, then the exchange arm 9 rotates 180 degrees, the positions of the inner, the inner bridge plate 4 where the processed workpiece 5 is located is moved to the outside of the machine, the outer bridge plate 2 where the blank is located is moved to the inside of the machine, then the exchange arm 9 begins to descend to enable the original inner bridge plate to fall on the supporting plate 12, meanwhile, the fixing pin 13 below the original outer bridge plate is inserted into the hydraulic locking device 14, after the fixing pin 13 is locked by the hydraulic locking device 14, the exchange arm 9 continues to descend to the original height, the protrusions 11 of the original inner bridge plate and the original outer bridge plate are enabled to be completely separated from the grooves 10 at the two ends of the exchange arm 9, and therefore the whole process of replacing the bridge plates is completed.

EXAMPLE III

As shown in fig. 5, a vertical machining center includes a bridge plate exchange device in the second embodiment, and a column 24 disposed on one side of a machine tool base 3, wherein a vertical guide rail 25 is disposed on the column 24, a vertical spindle box 26 is slidably mounted on the vertical guide rail 25, and two vertical spindles 27 are mounted on the vertical spindle box 26.

Example four

As shown in fig. 6, a horizontal machining center includes a bridge plate exchange device in the second embodiment, and a column 24 disposed on one side of a machine tool base 3, wherein a vertical guide rail 25 is disposed on the column 24, a horizontal spindle box 28 is slidably mounted on the vertical guide rail 25, and two horizontal spindles 29 are mounted on the horizontal spindle box 28.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (10)

1. A bridge plate exchange apparatus comprising:

an outer bridge plate above the exchange table, the outer bridge plate being mounted to and vertically separable from the support mechanism on the exchange table;

the machine inner bridge plate can move horizontally above the machine tool base and is fixed and separated up and down through a locking mechanism below the machine inner bridge plate; the external bridge plate and the internal bridge plate are used for clamping workpieces;

the exchange arm is fixed on the lifting and rotating mechanism between the external bridge plate and the internal bridge plate, and can lift and rotate for at least 180 degrees in a horizontal plane under the action of the lifting and rotating mechanism; the two ends of the exchange arm are provided with clamping and embedding structures which are matched and used for mutually and movably connecting with the external bridge plate and the internal bridge plate;

before the exchange of the external bridge plate and the internal bridge plate, the clamping and embedding structure at one end of the exchange arm close to the external bridge plate is positioned right below the clamping and embedding structure on the external bridge plate, and the axis of the rotating shaft of the lifting rotating mechanism and the midpoint of the exchange arm are on the same vertical line.

2. A bridge plate exchange unit according to claim 1 wherein the inner bridge plate has stop formations at each end to prevent the exchange arm from rotating past the stop formations.

3. A bridge plate exchange apparatus according to claim 2, wherein the blocking structure is at least two locking mechanisms, the at least two locking mechanisms being disposed on opposite sides of the underside of the inboard bridge plate.

4. The bridge plate switching device according to claim 2, wherein the blocking structure comprises a numerical control turntable and a disk tailstock, and the numerical control turntable and the disk tailstock are respectively connected with two ends of the bridge plate in the machine.

5. A bridge plate exchange unit according to claim 2 or 4, wherein the snap-fit formations on the inner bridge plate are located between the stop formations at the ends of the inner bridge plate.

6. The bridge plate switching device according to claim 1, wherein the engaging structure comprises a groove formed on both ends of the switching arm, a protrusion formed on the internal bridge plate or the external bridge plate or a protrusion formed on both ends of the switching arm, and a groove formed on the internal bridge plate or the external bridge plate.

7. A bridge plate exchange device according to claim 1, wherein the support means are two support plates or two support columns or two supports arranged on both sides of the exchange platform, and the external bridge plate is lapped on the two support plates or two support columns or two supports.

8. The bridge plate exchange device according to claim 1, wherein the locking mechanism comprises a fixed pin fixed to the bottom end of the bridge plate in the machine, and a hydraulic locking device adapted to the fixed pin for locking and unlocking the fixed pin.

9. A machining center comprising the bridge plate exchange device according to any one of claims 1 to 8, a column provided on one side of a machine tool base, and one or more vertical spindles mounted on the column.

10. A machining center comprising the bridge plate exchange device according to any one of claims 1 to 8, a column provided on one side of a machine tool base, and one or more horizontal spindles mounted on the column.

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