Multi-jaw clamp of machining center

Abstract

The utility model discloses a multi-jaw clamp of a machining center. The multi-jaw clamp comprises a clamp body, a lead screw, a movable seat and a jaw block. A transverse groove extending in the horizontal direction is formed in the clamp body, two lead screws are installed in the transverse groove, each lead screw is connected with two movable seats through nuts connected to the corresponding lead screw in a sleeving mode, the rotating directions of the nuts corresponding to the two movable seats on the same lead screw are opposite, and therefore the two movable seats are close to each other oppositely or away from each other oppositely at the same time when the lead screws rotate. And a jaw block is locked on each movable seat and can move along the lead screw along with the movable seat. A plurality of jaws formed by utilizing the structure can be used for simultaneously realizing internal supporting fixation and clamping fixation on a workpiece with an inner groove, so that the workpiece is prevented from being separated, the operation safety is guaranteed, and the flying-off workpiece is prevented from damaging the workpiece and equipment of a machining center. And a plurality of conventional workpieces can be respectively clamped and fixed by utilizing a plurality of jaws, so that the machining efficiency is favorably improved, and the device is suitable for large-scale operation of factories.

Description

Technical Field

[0001] The utility model relates to the technical field of machining centers, in particular to a multi-jaw fixture for a machining center. Background Technique

[0002] A machining center is a device that can perform multi-process precision machining on workpieces on a machine tool. When machining a workpiece on a machining center, it is generally necessary to fix workpieces such as small parts and small loose parts through a workpiece fixture configured on the workbench of the machine tool to ensure that these workpieces remain stable during the machining process before starting machining. Commonly used fixtures include parallel clamps, chucks, dividing heads, collet chucks, and vacuum suction cups, etc.

[0003] For some workpieces with internal grooves, the existing machining centers generally use a parallel clamp for clamping. However, simply clamping the outer edges at both ends of the workpiece by the jaws of the parallel clamp often results in unstable clamping of the workpiece due to insufficient clamping points, and then adverse phenomena such as the workpiece breaking away and flying out occur during the machining process. This not only affects the machining operation progress, but also may damage the workpiece and the machining center equipment itself, causing waste of resources and increasing the production and processing costs. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a multi-jaw fixture for a machining center to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a multi-jaw fixture for a machining center, which includes a jaw body, a lead screw, a movable seat, and a jaw block.

[0007] A horizontal groove extending in the horizontal direction is formed in the jaw body, and two lead screws are installed in the horizontal groove. The two lead screws are located on the same line. Each lead screw is respectively connected to two movable seats through nuts sleeved on the lead screw. The rotation directions of the nuts corresponding to the two movable seats on the same lead screw are opposite, so that when the lead screw rotates, the two movable seats move towards or away from each other simultaneously. The ends of the two lead screws are opposite to each other, and the thread rotation directions of the two lead screws are opposite; screw holes are formed at the top ends of the movable seats, and a jaw block is locked to each movable seat through a screw, and the jaw block can move along the lead screw with the movable seat.

[0008] Preferably, in the horizontal direction, knurling patterns are formed on the two jaw side surfaces of the jaw block that face away from each other.

[0009] Preferably, fixed racks are respectively arranged on both sides of the top of the jaw block.

[0010] Preferably, a notch extending inwards is formed on the fixed rack on one side of the jaw block. The fixed rack within the notch is located at the center of the jaw block, and the fixed racks at both ends of the notch are located at the edge of the jaw block.

[0011] Preferably, a stepped outer edge for placing a workpiece is formed on the jaw side of the jaw block.

[0012] Preferably, in the horizontal direction, more than one screw hole is arranged side by side on the movable seat.

[0013] Preferably, a hexagonal nut is connected to the head end of the lead screw, and the hexagonal nut protrudes outside the transverse groove.

[0014] The technical effects achieved by the technical solution of the present utility model include:

[0015] For workpieces with inner grooves, by applying the multi-jaw fixture of the above-mentioned machining center, the two lead screws can be rotated respectively. The two movable seats located inside the transverse groove move away from each other, and the movable seats drive the corresponding jaw blocks to move until the jaw blocks respectively abut against the groove walls of the inner grooves of the workpiece, realizing the inner support and fixation of the workpiece. The two jaw blocks on the same lead screw move towards each other and clamp the structure between the outer edge and the groove wall of the workpiece. This enables the above multi-jaw fixture to form multiple clamping points for workpieces with inner grooves, avoiding adverse phenomena such as the workpiece breaking away and flying out during the processing, ensuring safety and processing efficiency, and preventing the flying workpiece from damaging itself and the machining center equipment.

[0016] The multi-jaw fixture can fix two or more workpieces simultaneously, which is beneficial to improving the processing efficiency.

[0017] The setting of the knurling pattern and the fixed rack on the jaw block can further increase the friction between the contact surfaces and prevent the workpiece from shifting. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the multi-jaw fixture of the machining center provided by the embodiment of the present utility model;

[0019] Figure 2 It is a three-dimensional view of the jaw body in the multi-jaw fixture;

[0020] Figure 3 It is a three-dimensional view of each jaw block in the multi-jaw fixture;

[0021] Figure 4 It is a schematic diagram of fixing a workpiece with an inner groove on the multi-jaw fixture.

[0022] The reference numerals in the above-mentioned drawings are as follows:

[0023] The clamp body 1, the transverse groove 10, the lead screw 2, the hexagonal nut 21, the movable seat 3, the screw hole 30, the jaw block 4, the jaw side 41, the fixed rack 42, the notch 420, the stepped outer edge 43, the groove wall 51, the outer edge 52 of the workpiece. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Examples of these preferred implementation manners are illustrated in the accompanying drawings. The implementation manners of the present utility model shown in the drawings and described according to the drawings are merely exemplary, and the present utility model is not limited to these implementation manners.

[0025] Herein, to avoid obscuring the present utility model with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details of little relevance are omitted.

[0026] Referring to Figures 1 to 3 As shown, an embodiment of the present utility model provides a multi-jaw fixture for a machining center, which includes a clamp body 1, a lead screw 2, a movable seat 3, and a jaw block 4.

[0027] A transverse groove 10 extending in the horizontal direction is formed in the clamp body 1. Two lead screws 2 are installed in the transverse groove 10. The two lead screws 2 are on the same line. Each lead screw 2 is respectively connected to two movable seats 3 through nuts sleeved on the lead screw 2. The fixing manner of the nuts sleeved on the lead screw 2 and the movable seats 3 is similar to the corresponding structural cooperation manner in a conventional parallel-jaw clamp, and reference can be made to the corresponding structure in the parallel-jaw clamp. The rotation directions of the nuts corresponding to the two movable seats 3 on the same lead screw 2 are opposite, so that when the lead screw 2 rotates, the two movable seats 3 move towards or away from each other simultaneously. The ends of the two lead screws 2 are opposite to each other, and the thread rotation directions of the two lead screws 2 are opposite.

[0028] Therefore, by respectively rotating the two lead screws 2, the two movable seats 3 adjacent to each other at the ends of the two lead screws 2 can move towards or away from each other simultaneously, that is, the two movable seats 3 located inside the transverse groove 10 can cooperate to fix the workpiece, and the other two movable seats 3 spaced from the above two movable seats 3 at the ends of the two lead screws 2 at the first ends of the two lead screws 2 can also move towards or away from each other simultaneously, that is, the two movable seats 3 located at the two outer ends of the transverse groove 10.

[0029] A screw hole 30 is formed at the top of the movable seat 3. A jaw block 4 is locked to each movable seat 3 through a screw. The jaw block 4 can move along the lead screw 2 with the movable seat 3 and is used to abut against the surface of the workpiece to cooperate to clamp the workpiece.

[0030] Therefore, referring to Figure 4As shown in the figure, for a workpiece with an inner groove, by applying the multi-jaw fixture of the above machining center, the two lead screws 2 can be rotated respectively, and the two movable seats 3 located on the inner side of the transverse groove 10 move away from each other, and the movable seats 3 drive the corresponding jaw blocks 4 to move until the jaw blocks 4 respectively abut against the groove walls 51 of the inner groove of the workpiece, realizing the inner support and fixation of the workpiece; while the two jaw blocks 4 on the same lead screw 2 move closer to each other, clamping and fixing the structure between the outer edge 52 of the workpiece and the groove wall 51. Thus, the inner groove of the workpiece is internally supported and fixed, and the two ends of the outer edge 52 of the workpiece are respectively clamped and fixed, so that the above multi-jaw fixture can form multiple clamping points for the workpiece with an inner groove, which is more stable than simply clamping the outer edge 52 of the workpiece, avoiding bad phenomena such as the workpiece breaking away and flying out during the processing, ensuring safety and processing efficiency, and preventing the flying-off workpiece from damaging itself and the machining center equipment.

[0031] Of course, for conventional workpieces, the two jaw blocks 4 on the same lead screw 2 can also be used for clamping and fixing. Therefore, the multi-jaw fixture can fix two workpieces at the same time, which is beneficial to improving the processing efficiency. In addition, the specific dimensions of the above jaw blocks 4, the distance between the movable seats 3 and the placement orientation of the jaw blocks 4 can be adjusted at any time according to the fixing requirements derived from the dimensions and shapes of different workpieces. The form in the figure only serves as a reference and does not represent the only implementation mode.

[0032] In the horizontal direction, knurling patterns are formed on the two mutually opposite jaw sides 41 of the jaw block 4. Both of the two jaw sides 41 of the jaw block 4 can be used, that is, the two jaw sides 41 in the front and back directions of the jaw block 4 along the horizontal direction are both used to abut against the surface of the workpiece. By setting knurling patterns and the like, the contact surface is rougher, which helps to further improve the stability of fixing the workpiece.

[0033] To adapt to the shape structures of various workpieces, the jaw block 4 should be set in a form similar to a universal parallel-jaw vise. Therefore, in this embodiment, the two mutually opposite jaw surfaces of the jaw block are both perpendicular to the horizontal direction.

[0034] Specifically, fixed racks 42 are respectively arranged on both sides of the top of the jaw block 4. For some workpieces with uneven structures, the fixed racks 42 are easy to engage with them, and the anti-loosening effect is better when cooperating for fixation.

[0035] Further, a notch 420 recessed and extending inward is formed on the fixed rack 42 on one side of the jaw block 4. The fixed rack 42 within the notch 420 is located at the center of the jaw block 4, and the fixed racks 42 at both ends of the notch 420 are located at the edge of the jaw block 4, so that the opposite notches 420 on two adjacent jaw blocks 4 can be aligned with each other to clamp the workpiece. In this embodiment, a continuous and complete fixed rack 42 can be provided on one side of the jaw block 4 and a rack 42 with the above-mentioned notch 420 can be provided on the other side. Therefore, different segments of the fixed rack 42 can be selected according to the processing requirements to clamp the workpiece. When the workpiece to be clamped is relatively short, the rack 42 with the notch 420 can be selected, and the notch portion 420 can engage with the workpiece itself. When the workpiece is relatively long, the complete rack 42 is selected, so that the workpiece can extend beyond the transverse groove 10 to avoid blocking the workpiece.

[0036] A stepped outer edge 43 for placing the workpiece is formed on the jaw side surface 41 of the jaw block 4, that is, a horizontal table surface protrudes outward on the jaw side surface 41, which can play a role in supporting the bottom of the workpiece, making it easier and more stable to place the workpiece.

[0037] In the horizontal direction, more than one screw hole 30 is arranged side by side on the movable seat 3, so that the jaw block 4 can adjust its position in the horizontal direction by selecting the position of the screw hole 30 to be locked, change the displacement stroke, which is more convenient and has stronger applicability. Or more jaw blocks 4 can also be locked to increase the number of jaws.

[0038] A hexagonal nut 21 is connected to the head end of the lead screw 2, and the hexagonal nut 21 is exposed outside the transverse groove 10, facilitating the operator to quickly rotate the lead screw 2 through the hexagonal nut 21.

[0039] A plurality of threaded through holes are provided on both sides of the jaw body 1 to fix the jaw body 1 to the workbench of the machining center through screws.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0041] The above are only specific embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A multi-jaw fixture for a machining center, characterized in that: It comprises a clamp body (1), a lead screw (2), a movable seat (3) and a jaw block (4). The pliers body (1) is provided with a transverse groove (10) extending in the horizontal direction, and two screws (2) are installed in the transverse groove (10), the two screws (2) are located on the same line, and each screw (2) is connected to two movable seats (3) through a nut sleeved on the screw (2), and the nuts corresponding to the two movable seats (3) on the same screw (2) have opposite rotation directions, so that when the screw (2) rotates, the two movable seats (3) simultaneously move towards each other or move away from each other, the ends of the two screws (2) are opposite, and the threads of the two screws (2) have opposite rotation directions; A screw hole (30) is provided at the top of the movable seat (3), and a jaw block (4) is attached to each movable seat (3) by means of screws. The jaw block (4) can move along the lead screw (2) along with the movable seat (3).

2. The multi-jaw clamp for a machining center according to claim 1, characterized in that: In the horizontal direction, knurling patterns are formed on two jaw side surfaces (41) of the jaw block (4) that are facing away from each other.

3. The multi-jaw clamp for a machining center according to claim 1, characterized in that: Fixed racks (42) are respectively arranged on both sides of the top of the jaw block (4).

4. The multi-jaw clamp for a machining center according to claim 3, characterized in that: A notch (420) extending inwardly is formed on the fixed rack (42) on one side of the jaw block (4); the fixed rack (42) in the notch (420) is located at the center of the jaw block (4); and the fixed racks (42) at both ends of the notch (420) are located at the edge of the jaw block (4).

5. The multi-jaw clamp for a machining center according to claim 2, characterized in that: A stepped outer edge (43) for receiving a workpiece is formed on the jaw side surface (41) of the jaw block (4).

6. The multi-jaw clamp for a machining center according to claim 1, characterized in that: In the horizontal direction, more than one screw hole (30) is arranged in parallel on the movable seat (3).

7. The multi-jaw clamp for a machining center according to claim 1, characterized in that: The head end of the lead screw (2) is connected to a hexagonal nut (21), and the hexagonal nut (21) is exposed outside the transverse groove (10).

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