A self-centering fixture and machining center

Abstract

The utility model belongs to the field of mechanical processing technology, and particularly relates to a self-centering clamp and a machining center, including a telescopic member, a mounting seat, two sliders and a control switch; the telescopic member is arranged on the bottom side of the mounting seat, the telescopic member includes a telescopic rod passing through the mounting seat, a push block is arranged at the top of the telescopic rod, the push block is provided with two oblique push grooves, and the two oblique push grooves are respectively arranged on both sides of the center of the push block; the two sliders are slidably connected to both sides of the top of the mounting seat, an oblique push block is arranged at the bottom of the slider, and the oblique push block slides into the corresponding oblique push groove; the control switch is connected to the telescopic member, which is used to control the telescopic rod to extend and retract, so that the oblique push groove of the push block pushes the corresponding slider to move. The workpiece to be clamped can be placed between the two sliders, and the push block is driven to rise and fall by the telescopic member, and cooperates with the corresponding oblique push block in the two oblique push grooves, so that the two sliders can move toward each other at the same time and clamp the workpiece. Since the two sliders move synchronously, the effect of self-centering clamping can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, in particular to a self-centering clamp and a processing center. Background Art

[0002] A fixture is a device used to fix the object to be processed in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. It is a device that can quickly, conveniently and safely install the workpiece in any process of the process.

[0003] For example, the Chinese patent document with publication number CN221159463U discloses an adjustable self-centering precision flat-nose pliers, comprising a base, a first slideway is provided on the base, and protrusions are integrally formed at both ends of the base; a centering component, the centering component comprises two sloped sliders slidably arranged on the inner side of the first slideway, the sloped sliders are arranged opposite to each other, and through holes are provided on both sides of the lower part of the sloped sliders, and a sliding shaft passes through the through holes; both ends of the sliding shaft are fixed on the protrusions; a travel drive member, the travel drive member is installed with the sloped sliders; a rotating support, two rotating supports are provided, and are fixed opposite to each other in the middle of the top surface of the base; a pedestal, the bottom surface of the pedestal is a sloped structure that fits the sloped sliders, and a swing shaft is provided in the middle of both sides of the pedestal; the swing shaft is hinged on the rotating support; and a movable clamp and a fixed clamp are provided on the top of the pedestal. The movable clamp is slidably arranged on the inner side of the second slideway, and the movable clamp is rotatably installed with a screw rod, and the screw rod is installed to both ends of the second slideway through bearings; by rotating the screw rod, the movable clamp is driven to slide linearly in the second slideway, so that the movable clamp and the fixed clamp can clamp the workpiece.

[0004] In the technical solution of the above patent document, the movable clamp matched with the screw rod slides and clamps the workpiece with the fixed clamp by rotating the screw rod. There is a gap between the threads on the screw rod. The smaller the gap, the higher the moving accuracy and the higher the processing difficulty. Therefore, the movable clamp matched with the screw rod will be eccentric due to the gap of the screw rod thread, and cannot clamp the workpiece centered with the fixed clamp. Utility Model Content

[0005] The utility model aims to provide a self-centering clamp to solve the problem that the existing self-centering clamps adopt thread adjustment to clamp the workpiece, but cannot center the workpiece due to the thread gap problem.

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model provides a self-centering clamp, comprising a telescopic member, a mounting seat, two sliders and a control switch; the telescopic member is arranged on the bottom side of the mounting seat, the telescopic member comprises a telescopic rod passing through the mounting seat, a push block is provided at the top of the telescopic rod, the push block is provided with two oblique push grooves, and the two oblique push grooves are respectively arranged on both sides of the center of the push block; the two sliders are slidably connected to the top two sides of the mounting seat, an oblique push block is provided at the bottom of the slider, and the oblique push block slides into the corresponding oblique push grooves; the control switch is connected to the telescopic member, and is used to control the extension and retraction of the telescopic rod, so that the oblique push groove of the push block pushes the corresponding slider to move.

[0007] Furthermore, the telescopic member is a pneumatic cylinder or a hydraulic cylinder; the control switch is a manual valve arranged on one side of the mounting seat.

[0008] Furthermore, the two oblique push grooves are inclined upward toward opposite sides, and the oblique push grooves and the outer side of the push block form a pushing portion for pushing the slider to move toward the center position of the push block; the root thickness of the pushing portion is greater than the top thickness.

[0009] Furthermore, a groove and a mounting groove are provided on the top of the mounting seat, the push block is located in the groove, a guide rail is provided in the mounting groove, and the slide block is slidably connected to the guide rail.

[0010] Furthermore, two ends of the oblique push block extend from two sides of the slide block; and limiting members are provided on both sides of the mounting seat, and the limiting members are limited on the top side of the oblique push block.

[0011] The above one or more technical solutions in the self-centering fixture provided by the embodiment of the utility model have at least the following technical effects:

[0012] The workpiece to be clamped can be placed between the two sliders, and the push block is driven up and down by the telescopic member, and the two inclined push grooves cooperate with the corresponding inclined push blocks, so that the two sliders can move toward each other at the same time and clamp the workpiece. Since the two sliders move synchronously, the effect of self-centering clamping can be achieved. In addition, the inclined push block and the inclined push groove are matched, the structure is simple, easy to process, and the matching accuracy is guaranteed, thereby ensuring the effect of self-centering clamping. In addition, the inclined push groove and the inclined push block are matched, and the transmission efficiency is high.

[0013] A machining center includes a self-centering fixture, a base, a cutting spindle and a worktable; the base is provided with a movable gantry, the cutting spindle is arranged on the gantry, the worktable is arranged on the base, the worktable is provided with a clamping surface for clamping a workpiece, the self-centering fixture is arranged at one end of the base, and clamps different workpieces independently of the worktable.

[0014] Furthermore, it also includes a rotating mechanism, which is arranged at one end of the base; the rotating mechanism includes a rotating driving member and a flip plate, the flip plate is connected to the rotating driving member, and the self-centering clamp is arranged on the flip plate.

[0015] Furthermore, a second rotating mechanism is also provided on the flip plate, and the self-centering fixture is provided on the second rotating mechanism.

[0016] Furthermore, the gantry is provided with a plurality of the cutting spindles, and the flip plate is provided with the self-centering fixtures having the same number as the cutting spindles.

[0017] Furthermore, the second rotating mechanism includes a motor and reducers whose number is the same as the number of the self-centering clamps, and the self-centering clamps are arranged on the corresponding reducers; the motor is connected to each of the reducers.

[0018] The above one or more technical solutions in the machining center provided by the embodiment of the utility model have at least the following technical effects:

[0019] The machining center of the utility model can clamp two different workpieces on the clamping surface of the workbench and the self-centering fixture respectively, so the workpiece on the workbench and the workpiece on the self-centering fixture can be processed by the same cutting spindle to ensure that the precision of the cutting surfaces of the two workpieces is consistent. When the two workpieces need to be assembled, the assembly precision can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A three-dimensional diagram of a self-centering clamp provided in an embodiment of the utility model.

[0022] Figure 2 A partial structural diagram of a self-centering clamp provided in an embodiment of the utility model.

[0023] Figure 3 A three-dimensional diagram of a machining center provided in an embodiment of the utility model.

[0024] Figure 4 A structural diagram of the second rotating mechanism of the machining center provided in an embodiment of the utility model.

[0025] In the figure, 100, self-centering fixture, 110, telescopic member, 111, push block, 112, oblique push groove, 113, squeeze push portion, 120, mounting seat, 121, groove, 122, mounting groove, 123, guide rail, 130, slider, 131, oblique push block, 140, control switch, 150, limit member;

[0026] 200. Machining center; 210. Cutting spindle; 220. Work table; 221. Clamping surface; 230. Base; 240. Gantry; 250. Rotating mechanism; 251. Rotating drive member; 252. Flip plate; 253. Second rotating mechanism; 254. Motor; 255. Reducer. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "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 embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0031] In one embodiment of the machining center of the utility model, please refer to Figure 1 to Figure 4 . The machining center 200 can complete the machining of two different workpieces, especially the machining of two workpieces with an assembly relationship, and ensure the accuracy of the assembly surface. Specifically, the machining center 200 of this embodiment includes a base 230, a cutting spindle 210, a worktable 220 and a self-centering fixture 100. A movable gantry 240 is provided on the base 230, and the gantry 240 is driven to move on the base 230 by a servo electric screw assembly. The cutting spindle 210 is arranged on the gantry 240, and the cutting spindle 210 can be driven by the servo electric screw assembly so that the motion trajectory of the cutting spindle 210 is perpendicular to the motion trajectory of the gantry 240. The worktable 220 is arranged on the base 230, and the worktable 220 is provided with a clamping surface 221, and a workpiece that needs to be processed and has a larger volume can be clamped on the clamping surface 221. The self-centering fixture 100 is arranged at one end of the base 230, and clamps different workpieces independently of the worktable 220. Specifically, a workpiece with a smaller volume can be clamped on the self-centering fixture 100 .

[0032] Specifically, two different workpieces can be clamped on the clamping surface 211 of the workbench 210 and the self-centering fixture 100, respectively. Therefore, the workpiece on the workbench 210 and the workpiece on the self-centering fixture 100 can be processed by the same cutting spindle 210 to ensure that the precision of the cutting surfaces of the two workpieces remains consistent. When the two workpieces need to be assembled, the assembly precision can be guaranteed. In addition, the machining center of this embodiment can clamp the large workpiece on the workbench 210 when only processing large workpieces. When only processing small workpieces, it is only necessary to clamp the workpiece on the self-centering fixture 100, thereby saving the workload of clamping. There is no need to set up an independent fixture on the workbench 210.

[0033] Please refer to Figure 1 and Figure 2The self-centering fixture 100 of this embodiment includes a telescopic member 110, a mounting seat 120, two sliders 130 and a control switch 140. The telescopic member 110 is arranged on the bottom side of the mounting seat 120. The telescopic member 110 includes a telescopic rod passing through the mounting seat 120. A push block 111 is arranged at the top of the telescopic rod. The push block 111 is provided with two oblique push grooves 112. The two oblique push grooves 112 are respectively arranged on both sides of the center of the push block 111. The two sliders 130 are slidably connected to both sides of the top of the mounting seat 120. An oblique push block 131 is arranged at the bottom of the slider 130. The oblique push block 131 slides into the corresponding oblique push groove 112. The control switch 140 is connected to the telescopic member 110 and is used to control the telescopic rod to extend and retract, so that the oblique push groove 112 of the push block 111 pushes the corresponding slider 130 to move. In this embodiment, the workpiece to be clamped can be placed between the two sliders 130, or two profiling clamping blocks can be set on the two sliders 130 (the profiling clamping blocks can be set with different clamping surfaces according to the specific shape of the workpiece), and the push block 111 is driven to rise and fall by the telescopic member 110, and the two oblique push grooves 112 cooperate with the corresponding oblique push blocks 131, so that the two sliders 130 can move toward each other at the same time and clamp the workpiece. Since the two sliders 130 move synchronously, the effect of self-centering clamping can be achieved. In addition, the oblique push block 131 is matched with the oblique push groove 112, the structure is simple, and it is easy to process. The matching accuracy of the two can be well ensured by simple mechanical processing, thereby ensuring the effect of self-centering clamping. In addition, the oblique push groove is matched with the oblique push block, and the transmission efficiency is high.

[0034] Further, the telescopic member 110 is a cylinder or a hydraulic cylinder, and the control switch 140 is a manual valve arranged on one side of the mounting seat. Specifically, the manual valve controls the cylinder or the hydraulic cylinder, which has a simple structure, simple operation, high stability, and saves manpower adjustment.

[0035] For further information, please refer to Figure 2 The two oblique push grooves 112 are inclined upward toward opposite sides, and the oblique push grooves 112 and the outer side of the push block 111 form a pushing portion 113 for pushing the slider 130 to move toward the center of the push block 111; the root thickness of the pushing portion 113 is greater than the top thickness. Specifically, the oblique push grooves 112 cooperate with the oblique push block 131, and the pushing portion 113 pushes the oblique push block 131 to drive the slider 130 to move toward the center of the push block 111, and the bottom of the oblique push block 131 is subjected to the greatest thrust. The root thickness of the pushing portion 113 is greater than the top thickness, which can make the slider move stably and ensure the matching strength between the push block 111 and the oblique push block 131.

[0036] For further information, please refer to Figure 1 and Figure 2The top of the mounting seat 120 is also provided with a groove 121 and a mounting groove 122, the push block 111 is located in the groove 121, a guide rail 123 is provided in the mounting groove 122, and the slider 130 is slidably connected to the guide rail 123. Specifically, the push block 111 is located in the groove 121 to limit the lateral movement distance of the push block 111; the slider 130 is slidably connected to the guide rail 123, so that the slider 130 moves back and forth stably.

[0037] For further information, please refer to Figure 1 and Figure 2 The two ends of the oblique push block 131 extend from the two sides of the slider 130; the two sides of the mounting seat 120 are provided with stoppers 150, which are limited at the top side of the oblique push block 131. Specifically, the stoppers 150 are used to limit the vertical thrust transmitted to the slider 130 when the push block 111 moves upward, so as to ensure the stability of the sliding connection between the slider 130 and the mounting seat 120.

[0038] For further information, please refer to Figure 3 The machining center 200 further includes a rotating mechanism 250, which is disposed at one end of the base 230; the rotating mechanism 250 includes a rotating driving member 251 and a flip plate 252, the flip plate 252 is connected to the rotating driving member 251, and the self-centering fixture 100 is disposed on the flip plate. Specifically, the rotating driving member 251 drives the flip plate 252 to rotate, so that the self-centering fixture 100 rotates with the flip plate 252, and the cutting spindle 210 can process the side of the workpiece clamped by the self-centering fixture 100, and the workpiece can be clamped once and processed on multiple sides, thereby improving the processing efficiency.

[0039] For further information, please refer to Figure 4 The flip plate 252 is also provided with a second rotating mechanism 253, and the self-centering fixture 100 is provided on the second rotating mechanism 253. Specifically, the second rotating mechanism 253 drives the self-centering fixture 100 to rotate on the flip plate 252, so that the cutting spindle 210 can process the workpiece clamped by the self-centering fixture 100 at different angles, further improving the processing efficiency.

[0040] For further information, please refer to Figure 3 , a plurality of cutting spindles 210 are arranged on the gantry 240, and a self-centering fixture 100 having the same number as the cutting spindles 210 is arranged on the flip plate 252. Specifically, the plurality of cutting spindles 210 synchronously process the workpieces clamped by the plurality of self-centering fixtures 100, thereby improving the processing efficiency.

[0041] For further information, please refer to Figure 4The second rotating mechanism 253 includes a motor 254 and a reducer 255 of the same number as the self-centering fixture 100. The self-centering fixture 100 is arranged on the corresponding reducer 255; the motor 254 is connected to each reducer 255. Specifically, the reducer 255 can increase the bearing capacity of the self-centering fixture 100 to clamp the workpiece, and adjust the self-rotation speed of the self-centering fixture 100, so as to facilitate the precise processing of the workpiece by the cutting spindle 210. In addition, one motor 254 drives multiple reducers 255, so that the rotation angles of the workpieces clamped by multiple self-centering fixtures 100 are consistent, thereby improving the processing accuracy.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-centering fixture, characterized in that: It includes a telescopic member, a mounting seat, two sliders and a control switch; the telescopic member is arranged on the bottom side of the mounting seat, the telescopic member includes a telescopic rod passing through the mounting seat, a push block is provided at the top of the telescopic rod, the push block is provided with two oblique push grooves, and the two oblique push grooves are respectively arranged on both sides of the center of the push block; the two sliders are slidably connected to the top two sides of the mounting seat, an oblique push block is provided at the bottom of the slider, and the oblique push block slides into the corresponding oblique push grooves; the control switch is connected to the telescopic member, and is used to control the telescopic rod to extend and retract, so that the oblique push grooves of the push block push the corresponding slider to move.

2. The self-centering fixture according to claim 1, characterized in that: The telescopic member is a pneumatic cylinder or a hydraulic cylinder; the control switch is a manual valve arranged on one side of the mounting seat.

3. The self-centering fixture according to claim 1, characterized in that: The two inclined push grooves are inclined upward toward opposite sides, and the inclined push grooves and the outer side of the push block form a pushing portion for pushing the slider to move toward the center position of the push block; the root thickness of the pushing portion is greater than the top thickness.

4. The self-centering fixture according to claim 1, characterized in that: The top of the mounting seat is also provided with a groove and a mounting groove, the push block is located in the groove, a guide rail is provided in the mounting groove, and the slide block is slidably connected with the guide rail.

5. The self-centering fixture according to claim 4, characterized in that: The two ends of the oblique push block extend from the two sides of the slide block; and the two sides of the mounting seat are provided with limiting members, and the limiting members are limited at the top side of the oblique push block.

6. A machining center, characterized in that: The self-centering fixture comprises the self-centering fixture as claimed in any one of claims 1 to 5, and further comprises a base, a cutting spindle and a worktable; the base is provided with a movable gantry, the cutting spindle is arranged on the gantry, the worktable is arranged on the base, the worktable is provided with a clamping surface for clamping a workpiece, the self-centering fixture is arranged at one end of the base, and clamps different workpieces independently of the worktable.

7. The machining center according to claim 6, characterized in that: It also includes a rotating mechanism, which is arranged at one end of the base; the rotating mechanism includes a rotating driving member and a flip plate, the flip plate is connected to the rotating driving member, and the self-centering clamp is arranged on the flip plate.

8. The machining center according to claim 7, characterized in that: The flip plate is also provided with a second rotating mechanism, and the self-centering fixture is provided on the second rotating mechanism.

9. The machining center according to claim 8, characterized in that: The gantry is provided with a plurality of the cutting spindles, and the flip plate is provided with the self-centering fixtures which are the same in number as the cutting spindles.

10. The machining center according to claim 9, characterized in that: The second rotating mechanism includes a motor and reducers having the same number as the self-centering fixtures, and the self-centering fixtures are arranged on the corresponding reducers; the motor is connected to each of the reducers.

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