CN219336815U - A multi-position workpiece positioning device for a numerically controlled machine tool - Google Patents

Abstract

The utility model discloses a multi-station workpiece positioning device for a numerically controlled machine tool, which comprises: a base plate; On the peripheral side of the tight sleeve, there is a station for placing workpieces between the positioning shoulder and the expansion sleeve; the expansion adjustment mechanism is connected with the expansion sleeve, and adjusts the expansion sleeve to expand radially toward the positioning shoulder to Clamp the workpiece or retract away from the positioning shoulder to release the workpiece. The positioning device of the utility model can realize the clamping and positioning of a plurality of work stations, does not occupy excessive space, and has the characteristics of simple structure.

Description

A multi-position workpiece positioning device for a numerically controlled machine tool

technical field

The utility model relates to the technical field of numerical control machine tools, in particular to a multi-station workpiece positioning device for numerical control machine tools.

Background technique

In the process of machining the workpiece by the CNC machine tool, it is very important that the workpiece can be fastened at a specific position. Therefore, the positioning device is currently used to position and clamp the workpiece to prevent the workpiece from being displaced, tilted, etc. during processing. And make the defective product rate increase. In order to improve the efficiency of CNC machine tools for workpiece processing, the existing positioning devices are generally multi-station workpiece positioning devices, so that one positioning device can clamp and position multiple workpieces to realize simultaneous processing of multiple workpieces. However, the multiple stations of the existing multi-station workpiece positioning device are mostly arranged horizontally and/or vertically, each station is equipped with a clamping device, the structure is complex, and there is a large distance between adjacent stations , so that the number of stations is limited, and the size of the positioning device is relatively large, which is not suitable for widespread use.

Utility model content

In order to overcome at least one defect described in the above-mentioned prior art, the utility model provides a multi-station workpiece positioning device for a numerically controlled machine tool, which can realize clamping and positioning of multiple stations without excessively occupying space, and has The characteristics of simple structure.

The technical scheme that the utility model adopts for solving its problem is:

A multi-station workpiece positioning device for a numerically controlled machine tool, comprising:

Substrate;

The expansion sleeve is arranged on the base plate;

A plurality of positioning shoulders are installed on the base plate, and the plurality of positioning shoulders are arranged at intervals on the peripheral side of the expansion sleeve, and there is a station for placing workpieces between the positioning shoulders and the expansion sleeve;

The expansion adjustment mechanism is connected with the expansion sleeve, and adjusts the expansion sleeve to expand radially toward the positioning shoulder to clamp the workpiece or shrink away from the positioning shoulder to loosen the workpiece.

Further, the expansion adjustment mechanism includes an adjustment screw, a tightening nut and an elastic member. The elastic member is sleeved on the outer periphery of the top of the expansion sleeve. The hole runs through the base plate in the vertical direction, the adjusting screw passes through the through hole from top to bottom and can move up and down, and the tightening nut is arranged at the bottom of the base plate and can be threadedly connected with the adjusting screw.

Further, the tension adjusting mechanism also includes a stretching device arranged at the bottom of the base plate, and the stretching device is connected with the adjusting screw by tightening a nut.

Further, the stretching device includes a driving part, an output shaft and a base, the output shaft is connected to the output end of the driving part and extends downward, the base is sleeved on the output shaft, and the base is perpendicular to the output shaft, the base There is a hole through which the adjusting screw can go through, the adjusting screw is connected with the base through a tightening nut, and the axial direction of the adjusting screw is parallel to the axial direction of the output shaft.

Further, the driving part is electrically connected with a control mechanism.

Further, the driving part is fixedly connected to the bottom of the base plate, and the top of the base is provided with a spacer, and the spacer is an elastic structure.

Further, the shape of the side portion of the positioning shoulder and the expansion sleeve corresponding to the work station is adapted to the side portion of the workpiece.

Further, in the horizontal direction, the centers of the positioning shoulder, the workpiece and the expansion sleeve are on a straight line.

Further, both the positioning shoulder and the expansion sleeve are detachably connected to the base plate.

Further, the work station is provided with a plurality of supports, and the plurality of supports are spaced apart and evenly distributed to support the workpiece.

Beneficial effect:

The positioning device of the utility model, through the expansion sleeve and a plurality of positioning shoulders on the peripheral side of the expansion sleeve, forms a plurality of stations for placing workpieces on the peripheral side of the expansion sleeve, while ensuring multi-station Great space saving results in smaller dimensions of the positioning device. Moreover, the positioning device of the present invention can realize the clamping and positioning of multiple workpieces on the peripheral side of the expansion sleeve through the cooperation of one or more expansion sleeves and a group of expansion adjustment mechanisms. The structure is simple and compact, and the operation is convenient. The positioning efficiency of multiple workpieces is improved.

Description of drawings

Fig. 1 is an exploded view of a multi-station workpiece positioning device in an embodiment;

Fig. 2 is the structural representation of multi-station workpiece positioning device in the embodiment;

Fig. 3 is a partial structural schematic diagram of a multi-station workpiece positioning device in which no workpiece is placed in the embodiment.

Among them, the reference signs have the following meanings:

1. Substrate; 2. Expansion sleeve; 21. Through hole; 3. Positioning shoulder; 4. Workpiece; 5. Station; 6. Adjusting screw; 7. Tightening nut; 8. Elastic part; 9. Support ; 10, stretching device; 11, spacer; 12, fastening ring.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model.

This embodiment discloses a multi-station workpiece positioning device for a numerically controlled machine tool, so as to clamp and position multiple workpieces 4 that need to be processed by a numerically controlled machine tool through the positioning device. Referring to Fig. 1, the positioning device includes a base plate 1, and at least one expandable and telescopic expansion sleeve 2 is installed on the top surface of the base plate 1. Taking Fig. 1 as an example, two expansion sleeves 2 are installed at intervals on the base plate 1, practical application Among them, the number of expansion sleeves 2 can be adjusted according to the number of workpieces 4 to be positioned. The expansion sleeve 2 is a cylindrical structure, and its axial direction is perpendicular to the base plate 1. A plurality of positioning shoulders 3 are arranged at intervals on the circumference of each expansion sleeve 2, and the positioning shoulders 3 are installed on the base plate 1, and each There is a distance between the positioning shoulder 3 and the corresponding expansion sleeve 2, the size of which is not less than the radial dimension of the workpiece 4, thereby forming a station 5 between the positioning shoulder 3 and the expansion sleeve 2 (see Figure 3), the workpiece 4 can be placed at the station 5, so that the radial expansion of the expansion sleeve 2 can clamp the workpiece 4 and position it by the expansion sleeve 2 and the positioning shoulder 3. The positioning device of this embodiment, through the expansion sleeve 2 and a plurality of positioning shoulders 3 are arranged on the peripheral side of the expansion sleeve 2, to form a plurality of stations 5 for placing the workpiece 4 on the peripheral side of the expansion sleeve 2, in order to ensure It greatly saves space while achieving multi-station, making the positioning device have a smaller size.

In order to achieve stable clamping and positioning of the workpiece 4 , the shapes of the side portions of the positioning shoulder 3 and the expansion sleeve 2 corresponding to the station 5 are adapted to the side portions of the workpiece 4 . Taking the cylindrical workpiece 4 as an example, the processing position of the workpiece 4 in this structure is generally its two circular ends. Therefore, when the workpiece 4 is placed at the station 5, the axial direction of the workpiece 4 is perpendicular to the base plate 1, and the positioning is close to the shoulder. 3 and the side of the expansion sleeve 2 facing the workpiece 4 have an arc structure, the arc of the arc structure matches the side arc of the workpiece 4, and the center of the arc structure of the shoulder 3 and the expansion sleeve 2 is positioned The line passing through the center of the circular end of the workpiece 4. Thus, the positioning shoulder 3 and the expansion sleeve 2 can realize precise positioning of multiple workpieces 4 .

Furthermore, both the positioning shoulder 3 and the expansion sleeve 2 are detachably connected to the base plate 1, so that the corresponding positioning shoulder 3 and the expansion sleeve 2 can be replaced according to the shape of the workpiece 4, so as to improve the application range of the positioning device. The detachable connection between the positioning shoulder 3 and the base plate 1 in this embodiment is realized by a bolt and nut assembly.

Referring to Fig. 1 and Fig. 2, the contraction and expansion of the expansion sleeve 2 of this embodiment is realized by the expansion adjustment mechanism, so as to adjust the expansion sleeve 2 to expand radially toward the positioning shoulder 3 through the expansion adjustment mechanism to clamp Tighten the workpiece 4 or shrink away from the positioning shoulder 3 to loosen the workpiece 4. Therefore, the positioning device of this embodiment can realize the clamping and positioning of multiple workpieces 4 on the peripheral side of the expansion sleeve 2 through the cooperation of one or more expansion sleeves 2 and a group of expansion adjustment mechanisms, and the structure is simple and compact. The operation is convenient, and the positioning efficiency of multiple workpieces 4 is improved at the same time.

Specifically, the expansion adjustment mechanism includes an adjustment screw 6, a tightening nut 7, and an elastic member 8. The elastic member 8 is sleeved on the top outer periphery of the expansion sleeve 2. The expansion sleeve 2 is provided with an axial penetration and is connected to the adjustment screw 6. The through hole 21 is adapted, and the through hole 21 runs through the base plate 1 in the vertical direction. The adjustment screw 6 passes through the through hole 21 from top to bottom and can move up and down. The downward movement of the adjustment screw 6 can make the expansion sleeve 2 expand and become elastic. The piece 8 is stretched, the adjusting screw 6 moves upward, the elastic piece 8 rebounds to make the expansion sleeve 2 shrink, the tightening nut 7 is arranged under the base plate 1 and can be threadedly connected with the adjusting screw 6, and the tightening nut 7 The angle of rotation is different, and its pretightening force to adjusting screw 6 is different. When the workpiece 4 needs to be clamped and positioned, the adjusting screw 6 is pulled down to the desired position and locked by the tightening nut 7, so that the expansion sleeve 2 expands and clamps the workpiece 4 with the positioning shoulder 3, thereby realizing multiple Simultaneous clamping and positioning of 4 workpieces.

Referring to Fig. 1 and Fig. 2, the pull-down of adjustment screw 6 is realized by stretching device 10, and stretching device 10 is located at the below of substrate 1, and stretching device 10 comprises driving part 101, output shaft 102 and base 103, output The shaft 102 is connected to the output end of the driving part 101 and extends downwards. The base 103 is sleeved on the output shaft 102, and the base 103 is perpendicular to the output shaft 102. The base 103 is provided with a hole for the adjustment screw 6 to pass through. , the adjusting screw 6 is connected to the base 103 by tightening the nut 7, and the axial direction of the adjusting screw 6 is parallel to the axial direction of the output shaft. Specifically, each adjusting screw 6 corresponds to two tightening nuts 7 , and the rotation directions of the two tightening nuts 7 are opposite, so as to realize the change of the pretightening force of the adjusting screw 6 . The driving part 101 drives the output shaft 102 to extend downward, drives the base 103 to move downward, and the adjustment screw 6 is pulled down, so that the expansion sleeve 2 expands and clamps the workpiece 4 with the positioning shoulder 3, thereby realizing multiple workpieces 4 at the same time clamping and positioning, at this time the elastic member 8 is stretched; when it is necessary to loosen the workpiece 4, the driving part 101 drives the output shaft 102 to shrink upward, driving the base 103 to move upward, the adjusting screw 6 returns upward, and the elastic member 8 shrinks and rebounds, so that the expansion sleeve 2 shrinks and releases the workpiece 4. In this embodiment, by setting the stretching device 10, multiple adjustment screws 6 can be simultaneously pulled down by the stretching device 10, so as to realize simultaneous clamping and positioning of multiple workpieces 4 around multiple expansion sleeves 2, with high efficiency.

The driving part 101 of this embodiment may be a hydraulic pump or an air cylinder, and the corresponding output shaft 102 may be a piston rod or a telescopic rod.

Further, the driving part 101 can be electrically connected with a control mechanism, and the control mechanism can be a CNC machine tool control mechanism, so that the pull-down length of the adjustment screw 6 can be automatically realized through the control mechanism, and the pretightening force of the tightening nut 7 on the adjustment screw 6 can be realized automatically. To adapt to different workpieces4.

Referring to Fig. 1, the driving part 101 is fixed on the bottom of the base plate 1, and the top of the base 103 is provided with a spacer 11, the spacer 11 is an elastic structure, which has a buffering effect, thereby avoiding the impact on the driving part 101 when the output shaft 102 shrinks upwards. If the impact is too large, a greater impact force will be generated on the substrate 1 .

In addition, the station 5 is provided with a plurality of supports 9, which are evenly distributed on the bottom of the workpiece 4, so that the workpiece 4 can be supported by the plurality of supports 9, so that there is a gap between the workpiece 4 and the substrate 1, so that After the workpiece 4 is processed, it is convenient to clean up the chips.

The working process of the positioning device of the present embodiment is as follows:

1) Before processing, install the positioning shoulder 3 and the expansion sleeve 2 that are compatible with the workpiece 4 to be processed on the positioning device, and the adjusting screw 6 passes through the through hole 21 and the hole of the base 103 and is tightened by the nut 7 Locking, the top outer circumference of the expansion sleeve 2 is provided with a fastening ring 12 to avoid expansion of the expansion sleeve 2;

2) Place the workpiece 4 on the station 5 through the machine tool, and the workpiece 4 is supported by the support member 9, and ensure that the line connecting the center of the arc structure of the positioning shoulder 3 and the expansion sleeve 2 passes through the center of the workpiece 4 center of circle

3) Start the stretching device 10, the driving part 101 drives the output shaft 102 to extend downwards, and drives the base 103 to move downwards. At the same time, after pulling down a plurality of adjusting screws 6 to the designated position, according to the needs of the workpiece 4, tighten the nuts 7. Lock the adjusting screw 6 with the required pre-tightening force. At this time, the expansion sleeve 2 expands and clamps the workpiece 4 with the positioning shoulder 3, and the elastic member 8 is stretched and stretched;

4) The CNC machine tool processes the workpiece 4;

5) After the processing is completed, close the stretching device 10, the output shaft 102 shrinks upwards, drives the base 103 to move upwards, the multiple adjustment screws 6 return upwards, and the elastic member 8 shrinks and rebounds to shrink the expansion sleeve 2, thereby Loosen the workpiece 4 to facilitate machine tool unloading.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (10)

1. A multi-station workpiece positioning device for a numerically controlled machine tool, characterized in that it comprises: Substrate; The expansion sleeve is arranged on the base plate; A plurality of positioning shoulders are installed on the base plate, and the plurality of positioning shoulders are arranged at intervals on the peripheral side of the expansion sleeve, and there is a place between the positioning shoulders and the expansion sleeve. Work station; The expansion adjustment mechanism is connected with the expansion sleeve, and adjusts the expansion sleeve to expand radially toward the positioning shoulder to clamp the workpiece or shrink away from the positioning shoulder to loosen the workpiece . 2. A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 1, characterized in that: said expansion adjustment mechanism includes an adjusting screw tightening nut and an elastic member, and said elastic member is sleeved on said The outer periphery of the top of the expansion sleeve, the expansion sleeve is provided with a through hole axially penetrating and adapted to the adjustment screw, the through hole vertically penetrates the base plate, the adjustment screw (6) The through hole passes through the through hole from top to bottom and can move up and down. The tightening nut is arranged under the base plate and is threadedly connected with the adjusting screw. 3. A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 2, characterized in that: said expansion adjustment mechanism also includes a stretching device arranged at the bottom of said base plate, said stretching device passes The tightening nut is connected with the adjusting screw. 4. A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 3, characterized in that: said stretching device comprises a driving part, an output shaft and a base, and said output shaft and said driving part The output end is connected and extends downward, the base is sleeved on the output shaft, and the base is vertically arranged to the output shaft, and the base is provided with a hole through which the adjustment screw can penetrate, The adjusting screw is connected to the base through the tightening nut, and the axial direction of the adjusting screw is parallel to the axial direction of the output shaft. 5 . The multi-station workpiece positioning device for a numerically controlled machine tool according to claim 4 , wherein the driving part is electrically connected with a control mechanism. 6 . 6. The multi-station workpiece positioning device for a numerically controlled machine tool according to claim 4, characterized in that: the drive part is fixedly connected to the bottom of the base plate, and a spacer is provided on the top of the base, so that The spacer is an elastic structure. 7. A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 1, characterized in that: the shape of the positioning shoulder and the side part of the expansion sleeve corresponding to the station is the same as that of the station. Compatible with the side of the workpiece described above. 8. A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 7, characterized in that: in the horizontal direction, the centers of the positioning shoulder, the workpiece and the expansion sleeve are in a straight line superior. 9 . The multi-station workpiece positioning device for a numerically controlled machine tool according to claim 1 , wherein both the positioning shoulder and the expansion sleeve are detachably connected to the base plate. 10 . 10 . A multi-station workpiece positioning device for a numerically controlled machine tool according to claim 1 , wherein the station is provided with a plurality of supports, and the plurality of supports are spaced apart and evenly distributed to support the workpiece. 11 .

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