An inner and outer clamping device for numerical control machine tool

Abstract

The present application relates to a kind of inside and outside clamping device for CNC machine tool, first, by the setting of inner clamping block and outer clamping block, it can be convenient to hold different diameter solid round tube and hollow round tube, and it is stronger in flexibility and practicality;In addition, when needing to hold thinner hollow round tube, hollow round tube can be placed between inner clamping block and outer clamping block, then first by the sliding of first slider, let inner clamping block be tightly pressed on the inner wall of hollow round tube, then by the sliding of second slider, let outer clamping block be clamped on the outer wall of hollow round tube, realize the clamping of hollow round tube workpiece under the action of inner clamping block and outer clamping block, while guaranteeing that the force balance inside and outside round tube workpiece, so that the deformation of round workpiece can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control machining, in particular to an inner and outer clamping device for numerical control machine tools. BACKGROUND

[0002] A numerical control machine tool is a kind of automatic machine tool equipped with a program control system, which can logically process programs with control codes or other symbolic instructions and translate them, so as to make the machine tool act and process workpieces.

[0003] The existing numerical control machine tools generally use clamping jaws and other mechanisms to clamp workpiece objects, but when clamping some hollow parts such as hollow pipes, the clamping jaws are directly used for clamping and fixing work, and the clamping force of the clamping jaws is large, which can cause the outer wall of the hollow pipe to be concave, thereby generating clamping indentations, and in severe cases, the workpiece can be scrapped due to excessive deformation. SUMMARY

[0004] The present application aims to at least solve one of the problems existing in the prior art, and for this purpose, the present application provides an inner and outer clamping device for a numerical control machine tool.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] An inner and outer clamping device for a numerical control machine tool, comprising a workbench, three first sliding rails extending in the radial direction are arranged on the upper end surface of the workbench, a first sliding block is slidably arranged in each first sliding rail, an adjustable inner and outer clamping assembly is arranged on the first sliding block, the adjustable inner and outer clamping assembly comprises an inner clamping block and an outer clamping block, the inner clamping block is arranged on the inner side of the first sliding block, a second sliding rail is arranged on the upper end of the first sliding block and is arranged in the same direction as the first sliding rail, a second sliding block is slidably arranged in the second sliding rail, the outer clamping block is arranged on the second sliding block, a first driving mechanism and a second driving mechanism are further arranged on the lower end of the workbench, the first driving mechanism is used to drive all the first sliding blocks to move synchronously outward or inward, and the second driving mechanism is used to drive all the second sliding blocks to move synchronously outward or inward.

[0007] In some embodiments, a spindle seat is coaxially arranged on the lower end of the workbench, and the first driving mechanism and the second driving mechanism are both connected to the spindle seat.

[0008] In some embodiments, the first driving mechanism comprises a transmission disc rotatably arranged at the lower end of the workbench, an end face thread is arranged on the upper end face of the transmission disc, the end face thread extends into the first sliding rail, a transmission tooth groove capable of threadedly cooperating with the end face thread is arranged on the bottom of the first sliding block, a circular groove is arranged on the bottom of the transmission disc, a gear ring is arranged on the side wall of the circular groove, a motor is arranged in the main shaft seat, a driving gear is arranged on the output shaft of the motor, and the driving gear is in driving connection with the gear ring through a plurality of idler gears.

[0009] In some embodiments, the second driving mechanism comprises a cavity arranged in the first sliding block and in communication with the second sliding rail, a sliding seat is arranged on the lower side of the second sliding block, the sliding seat is arranged in the cavity, a slanting guide groove penetrates through one side of the sliding seat, a movable plate slides up and down on the lower side of the first sliding block, the upper end of the movable plate extends into the cavity and is provided with a first guide cross bar, the first guide cross bar is arranged in the slanting guide groove, a lifting ring is arranged at the lower end of the workbench, a lifting device for driving the lifting ring to lift up and down is arranged on the outer side of the main shaft seat, and the lower end of the movable plate is connected with the lifting ring.

[0010] In some embodiments, a second guide cross bar is arranged at the lower end of the movable plate, and a guide cross groove is arranged on the lifting ring, the second guide cross bar is slidably arranged in the guide cross groove.

[0011] In some embodiments, the lifting device comprises a plurality of cylinder mounting seats which are circumferentially and uniformly arranged on the outer side of the main shaft seat, a cylinder is arranged on each cylinder mounting seat, and the piston rod of the cylinder is connected with the lifting ring.

[0012] In some embodiments, an extension plate is arranged at one end of the movable plate in the cavity, a limiting seat is arranged on the extension plate, a vertical guide groove is in communication with the upper end of the slanting guide groove, and when the first guide cross bar is located in the vertical guide groove, the limiting seat extends into the second sliding rail and is used for limiting the sliding of the second sliding block.

[0013] In some embodiments, a spring is connected between the sliding seat and the inner side of the cavity.

[0014] In some embodiments, an organ plate is connected to the inner end of the first sliding block, and the other end of the organ plate is connected to the inner end of the first sliding rail.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. Firstly, the inner clamping block and the outer clamping block can facilitate clamping of solid round pipes and hollow round pipes with different diameters, and have high flexibility and practicability;

[0017] 2、In addition, when a thin hollow circular pipe needs to be clamped, the hollow circular pipe can be placed between the inner clamping block and the outer clamping block, and then the inner clamping block is first clamped against the inner wall of the hollow circular pipe by following the sliding of the first sliding block, and then the outer clamping block is clamped against the outer wall of the hollow circular pipe by following the sliding of the second sliding block, so that the clamping of the hollow circular pipe workpiece is realized under the action of the inner clamping block and the outer clamping block, and the balance of the inner and outer forces of the circular pipe workpiece is ensured, thereby avoiding the deformation of the circular workpiece.

[0018] 3、The first driving mechanism is used for driving all the first sliding blocks to move outward or inward synchronously, and the second driving mechanism is used for driving all the second sliding blocks to move outward or inward synchronously, so that the workpiece can be clamped or loosened conveniently without manual operation one by one, and the machining efficiency is improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is one of the three-dimensional schematic views of the workbench of the present application;

[0020] Figure 2 It is the second three-dimensional schematic view of the workbench of the present application;

[0021] Figure 3 It is a sectional view of the workbench of the present application;

[0022] Figure 4 It is an enlarged schematic view of A of the present application; Figure 3

[0023] Figure 5 It is one of the partial sectional views of the present application;

[0024] Figure 6 It is the second partial sectional view of the present application;

[0025] Figure 7 It is the third partial sectional view of the present application. DETAILED DESCRIPTION

[0026] The following detailed implementation provides a plurality of different embodiments or examples for implementing the present application. Of course, these are only embodiments or examples and are not intended to be limiting. In addition, repeated reference numerals can be used to indicate in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present application, and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0027] As Figures 1-7 ​The shown one kind number control machine tool uses inside and outside clamping device, including worktable 1, three first slide rails 2 along the radial direction extension are evenly arranged on the upper end surface of the worktable 1, first sliding block 3 is slid in each first slide rail 2, adjustable inside and outside clamping assembly is arranged on the first sliding block 3, the adjustable inside and outside clamping assembly includes inside clamping block 4 and outside clamping block 5, the inside clamping block 4 is located at the inside of the first sliding block 3, second slide rail 6 is also arranged on the upper end of the first sliding block 3 and is arranged in the same direction with the first slide rail 2, second sliding block 7 is slid in the second slide rail 6, the outside clamping block 5 is arranged on the second sliding block 7, first drive mechanism and second drive mechanism are also arranged on the lower end of the worktable 1, the first drive mechanism is used to drive all first sliding block 3 to move synchronously outward or inward, and the second drive mechanism is used to drive all second sliding block 7 to move synchronously outward or inward.

[0028] In the application, the inside clamping block 4 and the outside clamping block 5 are arranged, so that the solid round pipe and the hollow round pipe with different diameters can be clamped conveniently, and the flexibility and practicability are high.

[0029] In addition, when the hollow round pipe needs to be clamped, the hollow round pipe is placed between the inside clamping block 4 and the outside clamping block 5, then the inside clamping block 4 is tightly arranged on the inner wall of the hollow round pipe by sliding the first sliding block 3, and then the outside clamping block 5 is clamped on the outer wall of the hollow round pipe by sliding the second sliding block 7, so that the hollow round pipe workpiece is clamped under the action of the inside clamping block 4 and the outside clamping block 5, and the force balance inside and outside the round pipe workpiece is ensured, so that the deformation of the round workpiece can be avoided.

[0030] The first drive mechanism and the second drive mechanism are arranged on the lower end of the worktable 1, the first drive mechanism is used to drive all first sliding block 3 to move synchronously outward or inward, and the second drive mechanism is used to drive all second sliding block 7 to move synchronously outward or inward, so that the workpiece can be clamped quickly without manual operation, and the processing efficiency is improved to a certain extent.

[0031] Referring to Figure 2 , Figure 3 As shown, the main shaft seat 21 is coaxially arranged on the lower end of the worktable 1, and the first drive mechanism and the second drive mechanism are connected to the main shaft seat 21.

[0032] Referring to Figures 2-7As shown, the first drive mechanism includes a transmission disc 31 rotatably arranged at the lower end of the workbench 1, an end face thread 32 is arranged on the upper end face of the transmission disc 31, the end face thread 32 extends into the first sliding rail 2, a transmission tooth groove 33 capable of threadedly cooperating with the end face thread 32 is arranged on the bottom of the first sliding block 3, the transmission of the transmission tooth groove 33 and the end face thread 32 is a conventional design, which will not be described in detail here; a circular groove 34 is arranged on the bottom of the transmission disc 31, a gear ring 35 is arranged on the side wall of the circular groove 34, a motor 36 is arranged in the main shaft seat 21, a driving gear 37 is arranged on the output shaft of the motor 36, and the driving gear 37 is drivingly connected with the gear ring 35 through a plurality of idler gears 38; during operation, the motor 36 drives the driving gear 37 to rotate, and then the transmission of the idler gears 38 and the gear ring 35 realizes the rotation of the transmission disc 31.

[0033] It is worth mentioning that the motor 36 is installed in the main shaft seat 21, which makes the overall layout more reasonable and the structure more compact, and is beneficial to reduce the occupied space of the chuck.

[0034] Referring to Figures 2-6 As shown, the second drive mechanism includes a cavity 41 arranged in the first sliding block 3 and communicated with the second sliding rail 6, a sliding seat 42 is arranged on the lower side of the second sliding block 7, the sliding seat 42 is arranged in the cavity 41, a diagonal guide groove 43 is formed on one side of the sliding seat 42, a movable plate 44 is slidably arranged on the lower side of the first sliding block 3, the upper end of the movable plate 44 extends into the cavity 41 and is provided with a first guide cross rod 45, the first guide cross rod 45 is arranged in the diagonal guide groove 43, a lifting ring 46 is arranged at the lower end of the workbench 1, a lifting device for driving the lifting ring 46 to move up and down is arranged on the outer side of the main shaft seat 21, and the lower end of the movable plate 44 is connected with the lifting ring 46; the lifting ring 46 is driven to move up and down by the lifting device, so as to drive the movable plate 44 to move up and down, when the movable plate 44 moves downward, the first guide cross rod 45 slides in the diagonal guide groove 43 of the sliding seat 42, so as to drive the sliding seat 42 to move along the inner side in the cavity 41, that is, to drive the outer clamping block 5 to move to the inner clamping block 4, and finally the hollow pipe is clamped by the cooperation of the outer clamping block 5 and the inner clamping block 4.

[0035] Further, a second guide cross rod 51 is arranged at the lower end of the movable plate 44, a guide cross groove 52 is arranged on the lifting ring 46, and the second guide cross rod 51 is slidably arranged in the guide cross groove 52; so that when the first sliding block 3 slides, the second guide cross rod 51 at the lower end of the movable plate 44 slides in the guide cross groove 52, and does not affect the normal sliding of the first sliding block 3.

[0036] Further, the lifting device comprises a plurality of cylinder mounting seats 61 arranged on the outer side of the main shaft seat 21 in a circumferential direction, and a cylinder 62 is arranged on each cylinder mounting seat 61, and the piston rod of the cylinder 62 is connected with the lifting ring 46.

[0037] An extension plate 71 is arranged at one end of the movable plate 44 in the cavity 41, a limiting seat 72 is arranged on the extension plate 71, and a vertical guide groove 73 is communicated with the upper end of the inclined guide groove 43, when the first guide cross rod 45 is located in the vertical guide groove 73, the limiting seat 72 extends into the second sliding rail 6, and is used for limiting the sliding of the second sliding block 7, so that the second sliding block 7 is limited in the second sliding rail 6, at this time, the hollow pipe can be clamped by the inner clamping block 4 or the outer clamping block 5.

[0038] A spring 81 is connected between the sliding seat 42 and the inner side of the cavity 41.

[0039] The specific working principle of the second driving mechanism is as follows:

[0040] The cylinder 62 drives the lifting ring 46 to move downwards, the second guide cross rod 51 is driven to move downwards through the guide cross groove 52 on the lifting ring 46, so as to drive the movable plate 44 and the first guide cross rod 45 to move downwards, first, the limiting seat 72 on the extension plate 71 moves downwards along with the movable plate 44 and is separated from the second sliding block 7, then the first guide cross rod 45 slides in the inclined guide groove 43, so that the sliding seat 42 can be driven to move along the inner side in the cavity 41, the second sliding block 7 slides inwards along the second sliding rail 6, that is, the outer clamping block 5 is driven to move towards the inner clamping block 4, and finally the hollow pipe is clamped through the cooperation of the outer clamping block 5 and the inner clamping block 4.

[0041] In the application, the end face thread 32 on the transmission disc 31 needs to extend into the first sliding rail 2 to cooperate with the transmission tooth groove 33 at the bottom of the first sliding block 3, so that the bottom wall of the first sliding rail 2 has a through sliding groove, therefore, the iron filings generated in the machining process can fall from the through sliding groove, which is difficult to clean and affects the transmission cooperation between the end face thread 32 and the transmission tooth groove 33, in order to solve the problem, the organ board 91 is connected to the inner end of the first sliding block 3, and the other end of the organ board 91 is connected to the inner end of the first sliding rail 2, so that the through sliding groove is closed through the organ board 91, and meanwhile, the normal sliding of the first sliding block 3 is not affected.

[0042] Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments and the description in the specification, and the principle of the present application can be variously changed and improved without departing from the spirit and scope of the present application, and all the changes and improvements fall within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An inner and outer clamping device for a numerical control machine tool, comprising a worktable (1), three first slide rails (2) extending in a radial direction are arranged on the upper end surface of the worktable (1) in a uniform manner, and a first sliding block (3) is slidably arranged in each of the first slide rails (2), characterized in that: The adjustable inner and outer clamping assembly is arranged on the first sliding block (3), and comprises an inner clamping block (4) and an outer clamping block (5). The inner clamping block (4) is arranged on the inner side of the first sliding block (3). A second sliding rail (6) is arranged on the upper end of the first sliding block (3) and is arranged in the same direction as the first sliding rail (2). A second sliding block (7) is slidably arranged in the second sliding rail (6). The outer clamping block (5) is arranged on the second sliding block (7). A first driving mechanism and a second driving mechanism are arranged on the lower end of the workbench (1). The first driving mechanism is used for driving all the first sliding blocks (3) to move synchronously outward or inward. The second driving mechanism is used for driving all the second sliding blocks (7) to move synchronously outward or inward. A main shaft seat (21) is coaxially arranged on the lower end of the workbench (1). The first driving mechanism and the second driving mechanism are both connected to the main shaft seat (21). The second driving mechanism comprises a cavity (41) arranged in the first sliding block (3) and communicating with the second sliding rail (6). A sliding seat (42) is arranged on the lower side of the second sliding block (7). The sliding seat (42) is arranged in the cavity (41). A slanting guide groove (43) penetrates through one side of the sliding seat (42). A movable plate (44) is slidably arranged on the lower side of the first sliding block (3). The upper end of the movable plate (44) extends into the cavity (41) and is provided with a first guide cross rod (45). The first guide cross rod (45) is arranged in the slanting guide groove (43). A lifting ring (46) is arranged on the lower end of the workbench (1). A lifting device is arranged on the outer side of the main shaft seat (21) and is used for driving the lifting ring (46) to lift up and down. The lower end of the movable plate (44) is connected with the lifting ring (46).

2. An internal and external clamping device for a numerically controlled machine tool according to claim 1, characterized in that: The first driving mechanism comprises a transmission disc (31) rotatably arranged on the lower end of the workbench (1). An end face thread (32) is arranged on the upper end face of the transmission disc (31). The end face thread (32) extends into the first sliding rail (2). A transmission tooth groove (33) capable of threadedly cooperating with the end face thread (32) is arranged on the bottom of the first sliding block (3). A circular groove (34) is arranged on the bottom of the transmission disc (31). A gear ring (35) is arranged on the side wall of the circular groove (34). A motor (36) is arranged in the main shaft seat (21). A driving gear (37) is arranged on the output shaft of the motor (36). The driving gear (37) is drivingly connected with the gear ring (35) through a plurality of idler gears (38).

3. The inner and outer clamping device for CNC machine tools according to claim 1, characterized in that: A second guide cross rod (51) is arranged on the lower end of the movable plate (44). A guide cross groove (52) is arranged on the lifting ring (46). The second guide cross rod (51) is slidably arranged in the guide cross groove (52).

4. The inner and outer clamping device for CNC machine tools according to claim 1, characterized in that: The lifting device comprises a plurality of cylinder mounting seats (61) arranged on the outer side of the main shaft seat (21) in a circumferential distribution, a cylinder (62) is arranged on each cylinder mounting seat (61), and a piston rod of the cylinder (62) is connected with a lifting ring (46).

5. The inner and outer clamping device for CNC machine tools according to claim 1, characterized in that: An extension plate (71) is arranged at one end of the movable plate (44) in the cavity (41), a limiting seat (72) is arranged on the extension plate (71), a vertical guide groove (73) is communicated with the upper end of the oblique guide groove (43), and when the first guide cross rod (45) is located in the vertical guide groove (73), the limiting seat (72) extends into the second sliding rail (6) and is used for limiting the sliding of the second sliding block (7).

6. An internal and external clamping device for a numerically controlled machine tool according to claim 1, characterized in that: A spring (81) is connected between the sliding seat (42) and the inner side of the cavity (41).

7. The inner and outer clamping device for CNC machine tools according to claim 1, characterized in that: An organ plate (91) is connected to the inner end of the first sliding block (3), and the other end of the organ plate (91) is connected to the inner end of the first sliding rail (2).

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