Positioning clamp for machining machine tool spindle pull rod

Abstract

The utility model discloses a positioning clamp for machining a machine tool spindle pull rod. The positioning clamp comprises a base plate, a plurality of supports are fixedly installed at the bottom of the base plate, a servo rotary table is fixedly installed at one end of the top of the base plate, a self-centering chuck is fixedly connected to an output shaft of the servo rotary table, and a tailstock is slidably connected to the other end of the top of the base plate. When in use, after one end of the pull rod is fixedly clamped by the self-centering chuck, the first electric cylinder is started to drive the tailstock to move, so that the tip cone is tightly propped against the other end of the pull rod to position the two ends of the pull rod, and then the U-shaped connecting seat is driven by the linear driving mechanism to move; and then the lifting mechanism is started to drive the U-shaped positioning base to ascend so that the supporting block can abut against the bottom of the pull rod, then the clamping mechanism is started to fixedly clamp the two sides of the to-be-machined position of the pull rod, the stability of the pull rod in the machining process can be guaranteed, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a positioning fixture, in particular to a positioning fixture used for machining a main shaft pull rod of a machine tool. Background Art

[0002] The machine tool spindle pull rod is one of the core components of the machine tool electric spindle automatic tool changing technology. It is mainly used to drive the pull claw inside the spindle to fix and clamp the tool holder or chuck.

[0003] In the processing of some spindle pull rods, it is necessary to open flat grooves, keyways or positioning holes on the circumferential surface of the pull rods, so a clamp is needed to position the pull rods. However, most of the current clamps cannot rotate the pull rods after clamping them. Therefore, when processing is required on the outer wall of the pull rods at multiple angles, the pull rods need to be clamped repeatedly, and it is difficult to ensure the positioning accuracy of the clamping. In some technical solutions, the pull rods are fixed by a self-centering chuck installed on a four-axis turntable, and the pull rods are driven to rotate by the turntables on all four sides. Although this can ensure the accuracy of the pull rod rotation angle, the pull rods are only supported at both ends during the processing (one end is fixed by the self-centering chuck and the other end is fixed by the tailstock), and the middle part is in a suspended state. Therefore, it is difficult to ensure the stability of the pull rods during the processing, which needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning fixture for machining a spindle drawbar of a machine tool, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A positioning fixture for processing a machine tool spindle pull rod comprises a base plate, a plurality of supports are fixedly installed on the bottom of the base plate, a servo turntable is fixedly installed at one end of the top of the base plate, and a self-centering chuck is fixedly connected to the output shaft of the servo turntable, a tailstock is slidably connected at the other end of the top of the base plate, a top cone which is coaxially arranged with the self-centering chuck is rotatably connected to the tailstock, a first electric cylinder for driving the tailstock is fixedly installed on the base plate, a U-shaped connecting seat is connected to the base plate via a linear drive mechanism, a U-shaped connecting seat is connected to the U-shaped positioning seat via a lifting mechanism, a support block is fixedly connected to the bottom inner wall of the U-shaped positioning seat, a clamping mechanism is installed on the U-shaped positioning seat, and the U-shaped positioning seat is located between the self-centering chuck and the top cone.

[0007] As a further solution of the present invention: two parallel guide rails are fixedly connected to the top of the base plate, and a first slider and a second slider are slidably connected to the guide rails. The first slider is fixedly connected to the tailstock, and the second slider is fixedly connected to the U-shaped connecting seat.

[0008] As a further solution of the present invention: the linear drive mechanism includes a screw rod rotatably installed at the bottom of the base plate, a servo motor for driving the screw rod is fixedly installed on the outer wall of the base plate, a nut is fitted on the screw rod, a connecting block is fixedly connected to the outer wall of the nut, an open groove is provided through the bottom of the base plate, and the top end of the connecting block passes through the open groove and is fixedly connected to the bottom of the U-shaped connecting seat.

[0009] As a further solution of the present invention: the lifting mechanism includes a second electric cylinder fixedly installed in the U-shaped connecting seat, the push rod end of the second electric cylinder is fixedly connected to a door-shaped slide, the door-shaped slide is located on the outside of the U-shaped connecting seat, and multiple guide grooves are provided on the outer walls on both sides of the U-shaped connecting seat, and guide bars are slidably connected in the guide grooves, and the guide bars are fixedly connected to the door-shaped slide.

[0010] As a further solution of the present invention: the clamping mechanism includes two third electric cylinders respectively fixedly mounted on both sides of the U-shaped positioning seat, and the push rod end of the third electric cylinder is fixedly connected to the inner side of the U-shaped positioning seat after passing through the inner side of the U-shaped positioning seat, and the outer walls of the mounting plate are fixedly connected to two clamping blocks, and the two clamping blocks are symmetrically distributed on both sides of the support block, and multiple guide rods are slidably passed through the outer walls of both sides of the U-shaped positioning seat, and the guide rods are fixedly connected to the corresponding mounting plates at one end located on the inner side of the U-shaped positioning seat.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] When the utility model is in use, after using the self-centering chuck to fix and clamp one end of the pull rod, the first electric cylinder is started to drive the tail stock to move so that the top cone is tightly against the other end of the pull rod to position the two ends of the pull rod, and then the linear drive mechanism is used to drive the U-shaped connecting seat to move so that the support block moves to just below the part of the pull rod to be processed, and then the lifting mechanism is started to drive the U-shaped positioning seat to rise so that the support block is against the bottom of the pull rod, and then the clamping mechanism is started to fix and clamp both sides of the part of the pull rod to be processed, so as to ensure the stability of the pull rod during the processing and have a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a positioning fixture for machining a machine tool spindle drawbar.

[0014] Figure 2 This is a structural schematic diagram of a guide bar in a positioning fixture used for machining a machine tool spindle drawbar.

[0015] Figure 3 This is a schematic diagram of the top view of the U-shaped positioning seat in a positioning fixture used for processing the spindle drawbar of a machine tool.

[0016] Figure 4 This is a structural schematic diagram of a connecting block in a positioning fixture used for machining a machine tool spindle drawbar.

[0017] Among them, the base plate 1, the support 2, the servo turntable 3, the self-centering chuck 4, the tailstock 5, the top cone 6, the first electric cylinder 7, the guide rail 8, the first slider 9, the second slider 10, the screw 11, the servo motor 12, the nut 13, the connecting block 14, the U-shaped connecting seat 15, the guide groove 16, the door-type slide 17, the guide bar 18, the second electric cylinder 19, the U-shaped positioning seat 20, the support block 21, the third electric cylinder 22, the mounting plate 23, the clamping block 24, the guide rod 25, and the opening groove 26. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation as described in the specification. Therefore, it should not be understood as a limitation on the present invention.

[0021] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0022] See also Figures 1 to 4The cam 21 is fixedly mounted on the bottom of the base 1, and a cam 22 is fixedly mounted on the top of the base 1. The cam 22 has a plurality of support members 2 mounted on the bottom of the base 1, a servo turntable 3 is fixedly mounted on one end of the top of the base 1, and a self-centering chuck 4 is fixedly connected to the output shaft of the servo turntable 3, a tailstock 5 is slidably connected to the other end of the top of the base 1, and a top cone 6 coaxially arranged with the self-centering chuck 4 is rotatably connected to the tailstock 5. A first electric cylinder 7 for driving the tailstock 5 is fixedly mounted on the base 1,

[0023] The utility model adopts the above-mentioned scheme. When in use, after using the self-centering chuck 4 to fix and clamp one end of the pull rod, the first electric cylinder 7 is started to drive the tail stock 5 to move so that the top cone 6 is tightly against the other end of the pull rod to position the two ends of the pull rod, and then the U-shaped connecting seat 15 is driven to move by the linear drive mechanism to move the support block 21 to be directly below the part of the pull rod to be processed, and then the lifting mechanism is started to drive the U-shaped positioning seat 20 to rise so that the support block 21 is against the bottom of the pull rod, and then the clamping mechanism is started to fix and clamp both sides of the part of the pull rod to be processed, so as to ensure the stability of the pull rod during the processing and achieve good use effect.

[0024] Specific combination Figure 1 and Figure 4 In one embodiment of the present invention, two parallel guide rails 8 are fixedly connected to the top of the base plate 1, and a first slider 9 and a second slider 10 are slidably connected to the guide rails 8. The first slider 9 is fixedly connected to the tailstock 5, and the second slider 10 is fixedly connected to the U-shaped connecting seat 15.

[0025] The cooperation between the two guide rails 8 and the first slider 9 and the second slider 10 can improve the stability of the tailstock 5 and the U-shaped connecting seat 15 in moving on the substrate 1 .

[0026] Specific combination Figure 1 and Figure 4 In one embodiment of the present utility model, the linear drive mechanism includes a screw rod 11 rotatably mounted on the bottom of the base plate 1, and a servo motor 12 for driving the screw rod 11 is fixedly mounted on the outer wall of the base plate 1. A nut 13 is fitted on the screw rod 11, and a connecting block 14 is fixedly connected to the outer wall of the nut 13. An open groove 26 is provided through the bottom of the base plate 1, and the top of the connecting block 14 passes through the open groove 26 and is fixedly connected to the bottom of the U-shaped connecting seat 15.

[0027] The servo motor 12 drives the screw rod 11 to rotate, and the screw rod 11 and the nut 13 cooperate to drive the U-shaped connecting seat 15 to slide along the guide rail 8. The structure is simple and the operation is stable.

[0028] Specific combination Figure 1 、 Figure 2 and Figure 4 In one embodiment of the present utility model, the lifting mechanism includes a second electric cylinder 19 fixedly installed in the U-shaped connecting seat 15, and the push rod end of the second electric cylinder 19 is fixedly connected to the door-shaped slide 17. The door-shaped slide 17 is located on the outside of the U-shaped connecting seat 15. The outer walls on both sides of the U-shaped connecting seat 15 are provided with multiple guide grooves 16, and guide bars 18 are slidably connected in the guide grooves 16, and the guide bars 18 are fixedly connected to the door-shaped slide 17.

[0029] By setting the second electric cylinder 19, the height of the door-shaped slide 17 can be adjusted on the U-shaped connecting seat 15. By cooperating with the guide bar 18 and the guide groove 16, the stability of the door-shaped slide 17 in rising and falling on the U-shaped connecting seat 15 can be ensured.

[0030] Specific combination Figure 1 、 Figure 3 and Figure 4 In one embodiment of the present utility model, the clamping mechanism includes two third electric cylinders 22 respectively fixedly mounted on both sides of the U-shaped positioning seat 20, and the push rod end of the third electric cylinder 22 is fixedly connected to the inner side of the U-shaped positioning seat 20. The outer wall of the mounting plate 23 is fixedly connected to two clamping blocks 24, and the two clamping blocks 24 are symmetrically distributed on both sides of the support block 21. The support block 21 and the clamping block 24 are both provided with V-shaped grooves. A plurality of guide rods 25 are slidably penetrated through the outer walls of both sides of the U-shaped positioning seat 20, and the guide rod 25 is fixedly connected to the corresponding mounting plate 23 at one end located on the inner side of the U-shaped positioning seat 20.

[0031] After using the support block 21 to support the bottom of the pull rod to be processed, start the two third electric cylinders 22 to drive the clamping block 24 to move toward the pull rod to fix and clamp the pull rod on both sides of the processing area. This not only ensures the stability of the pull rod during processing, but also avoids interference with the moving trajectory of the tool, and has a good use effect.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positioning fixture for machining a spindle rod of a machine tool, characterized by: The invention comprises a base plate (1), a plurality of supports (2) are fixedly mounted on the bottom of the base plate (1), a servo turntable (3) is fixedly mounted on one end of the top of the base plate (1), and a self-centering chuck (4) is fixedly connected to the output shaft of the servo turntable (3), a tailstock (5) is slidably connected to the other end of the top of the base plate (1), a top cone (6) coaxially arranged with the self-centering chuck (4) is rotatably connected to the tailstock (5), and a servo turntable (3) is fixedly mounted on the base plate (1). A first electric cylinder (7) for driving a tailstock (5) is provided. The base plate (1) is connected to a U-shaped connecting seat (15) via a linear drive mechanism. The U-shaped connecting seat (15) is connected to a U-shaped positioning seat (20) via a lifting mechanism. A support block (21) is fixedly connected to the bottom inner wall of the U-shaped positioning seat (20). A clamping mechanism is installed on the U-shaped positioning seat (20). The U-shaped positioning seat (20) is located between a self-centering chuck (4) and a top cone (6).

2. A positioning fixture for machining a spindle rod of a machine tool according to claim 1, characterized in that: Two mutually parallel guide rails (8) are fixedly connected to the top of the base plate (1), and a first slider (9) and a second slider (10) are slidably connected to the guide rails (8). The first slider (9) is fixedly connected to the tailstock (5), and the second slider (10) is fixedly connected to the U-shaped connecting seat (15).

3. The positioning fixture for machining a spindle rod of a machine tool according to claim 1, characterized in that: The linear drive mechanism comprises a screw rod (11) rotatably mounted on the bottom of a base plate (1); a servo motor (12) for driving the screw rod (11) is fixedly mounted on the outer wall of the base plate (1); a nut (13) is fitted on the screw rod (11); a connecting block (14) is fixedly connected to the outer wall of the nut (13); an open slot (26) is provided through the bottom of the base plate (1); and the top end of the connecting block (14) passes through the open slot (26) and is fixedly connected to the bottom of a U-shaped connecting seat (15).

4. The positioning fixture for machining a spindle rod of a machine tool according to claim 1, characterized in that: The lifting mechanism comprises a second electric cylinder (19) fixedly mounted in a U-shaped connecting seat (15); a push rod end of the second electric cylinder (19) is fixedly connected to a door-shaped slide seat (17); the door-shaped slide seat (17) is located outside the U-shaped connecting seat (15); a plurality of guide grooves (16) are provided on both side outer walls of the U-shaped connecting seat (15); guide bars (18) are slidably connected in the guide grooves (16), and the guide bars (18) are fixedly connected to the door-shaped slide seat (17).

5. The positioning fixture for machining a spindle rod of a machine tool according to claim 1, characterized in that: The clamping mechanism comprises two third electric cylinders (22) respectively fixedly mounted on both sides of the U-shaped positioning seat (20); the push rod end of the third electric cylinder (22) penetrates the inner side of the U-shaped positioning seat (20) and is fixedly connected to a mounting plate (23); the outer wall of the mounting plate (23) is fixedly connected to two clamping blocks (24); the two clamping blocks (24) are symmetrically distributed on both sides of the support block (21); the outer walls of both sides of the U-shaped positioning seat (20) are slidably penetrated by a plurality of guide rods (25), and one end of the guide rod (25) located on the inner side of the U-shaped positioning seat (20) is fixedly connected to the corresponding mounting plate (23).

Images