A clamp capable of automatically blowing chips

Abstract

This utility model discloses an automatic chip removal fixture, belonging to the field of machining technology. It includes a fixture sleeve (1) and a fixture head (2). The fixture sleeve (1) has a first cavity (3) along its own axial direction, an air inlet (4) and an air outlet (5) along its own radial direction. The fixture head (2) is installed in the first cavity (3). The fixture head (2) has a second cavity (6) along its own axial direction and several first gaps (7) along its own radial direction. The front end of the fixture head (2) is set as a clamping part (8), and the rear end of the fixture head (2) is connected to a driving mechanism (9). This utility model can automatically clean the waste chips adhering to the inner and outer surfaces of the fixture during the processing and during the gap of material change.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, specifically relating to a clamp that can automatically blow away chips. Background Technology

[0002] The applicant of this application filed a utility model patent application on September 21, 2011, entitled "Elastic Chuck Clamp," application number CN201120353696.8, publication number CN202219413U. This patent discloses a positioning clamp head with a hollow cavity wall and an opening groove. A screw is provided, one end of which has an inverted truncated cone head. The other end of the screw passes sequentially through the positioning clamp head, a first bushing, a second bushing, and a bearing turntable, such that the inverted truncated cone head of the screw is positioned on the hollow cavity wall. A nut then secures the other end of the screw. The first inclined slope on the first bushing (male surface) and the second inclined slope on the second bushing (female surface) are fitted and misaligned, maintaining the axial direction of the first and second bushings unchanged after misalignment. This elastic chuck clamp features a compact structure and accurate positioning.

[0003] However, the applicant discovered during actual production that workpieces mounted on the positioning chuck head generate waste chips during processing. These chips easily adhere to the inner and outer surfaces of the hollow cavity wall of the positioning chuck head and the outer surface of the inverted truncated cone head at the screw end. Long-term accumulation of these chips affects the accuracy of the positioning chuck head in limiting and fixing the workpiece, as well as the maintenance frequency of the positioning chuck head, thus impacting workpiece processing. Conventional manual cleaning is not only time-consuming and labor-intensive, increasing costs, but also reducing work efficiency. Therefore, it is necessary to improve the structure of the existing chuck fixture to achieve automatic cleaning of waste chips adhering to the inner and outer surfaces of the chuck fixture during processing and during material changeovers. Utility Model Content

[0004] The purpose of this invention is to overcome the technical problems in the prior art, such as the waste chips generated by the workpiece during the processing sticking to the inner and outer surfaces of the clamping head, affecting the clamping head's ability to limit and fix the workpiece, and thus affecting the processing of the workpiece. This invention provides a clamping device that can automatically blow away the waste chips, which can automatically clean the waste chips sticking to the inner and outer surfaces of the clamping device during the processing and during the gap between processing and material changes.

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic chip blowing fixture, including a fixture sleeve and a fixture head. The fixture sleeve has a first cavity formed along its axial direction and an air inlet and an air outlet formed along its radial direction. The first cavity is connected to the air inlet and the air outlet, respectively. The fixture head is installed in the first cavity. The fixture head has a second cavity formed along its axial direction and a plurality of first gaps formed along its radial direction. The plurality of first gaps are distributed sequentially along the circumferential direction of the fixture head and are connected to the first cavity and the second cavity, respectively. The front end of the fixture head is configured as a clamping part, and the rear end of the fixture head is connected to a driving mechanism. The driving mechanism is used to drive the fixture head to reciprocate along its axial direction within the first cavity.

[0006] As a further improvement of this utility model, the first cavity extends through the clamp sleeve in the axial direction, and the air inlet and air outlet both extend through the clamp sleeve in the radial direction. A first air duct for blowing debris from the inner surface of the clamp sleeve and the outer surface of the clamp head is formed from the air inlet, the first cavity, and the air outlet. The second cavity extends through the clamp head in the axial direction, and the first gap extends through the clamp head in the radial direction. A second air duct for blowing debris from the inner surface of the clamp head is formed from the air inlet, the first cavity, the first gap, the second cavity, and the air outlet.

[0007] As a further improvement of this utility model, the clamping part at the front end of the above-mentioned clamping head is provided with a plurality of clamping claws, the clamping claws are distributed sequentially along the circumferential direction of the clamping head, a first gap is formed between two adjacent clamping claws, and the front end of the second cavity is provided as a mounting cavity for placing the workpiece, the mounting cavity being located between the inner surfaces of the plurality of clamping claws.

[0008] As a further improvement of this utility model, the clamp head is provided with a plurality of second gaps that correspond to and are connected to the rear end of the first gap along its own radial direction. The plurality of second gaps are distributed sequentially along the circumferential direction of the clamp head, and the width of the second gap is greater than the width of the first gap.

[0009] As a further improvement of this utility model, the inner surface of the front end of the first cavity is provided with a first limiting surface. The first limiting surface is a conical surface, and the diameter of the first limiting surface gradually decreases from the front end of the clamp sleeve to the rear end of the clamp sleeve. The outer surface of the front end of the gripper is provided with a second limiting surface corresponding to the first limiting surface. The second limiting surface is an inclined arc surface, and the second limiting surface gradually inclines towards the axis of the clamp head from the front end of the clamp head to the rear end of the clamp head.

[0010] As a further improvement of this utility model, the output end of the aforementioned drive mechanism is connected to a sleeve, and the sleeve is connected to the clamp head.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting a first air inlet and a first air outlet on the fixture sleeve, this utility model integrates the clamping function of the fixture with chip cleaning. It can perform comprehensive and automatic cleaning of the waste chips adhering to the inner and outer surfaces of the fixture sleeve and fixture head during the processing and during the gap between processing and changing materials. This ensures that the waste chips are removed in a timely and effective manner during the processing and when changing workpieces, avoiding the problem of increased costs and reduced work efficiency caused by the need for manual cleaning when stopping the machine with traditional fixtures. It significantly reduces the disadvantages of fixture positioning errors or decreased clamping force caused by waste chips, ensures the cleanliness of the fixture sleeve and fixture head, maintains the processing environment, and makes this utility model more suitable for turning, milling and other machining processes that generate a lot of waste chips. 1. Suitable for unmanned workshops and automated production lines; 2. By cleaning up waste debris, this utility model can effectively prevent residual waste debris from scratching the workpiece surface, ensuring the stability and consistency of product processing quality. On the other hand, it can reduce the wear of waste debris on the precision mating surfaces such as the inner and outer surfaces of the fixture sleeve and fixture head, effectively extending the service life of the fixture; 3. In this utility model, the jaws on the fixture head are horizontally displaced under the drive of the drive mechanism, thereby cooperating with the fixture sleeve to adjust the width of the first gap, realizing the elastic clamping or loosening of the workpiece. The optimized design of the width of the second gap on the fixture head allows the jaws to undergo elastic deformation when restricted contraction, preventing the jaws from fatigue fracture due to repeated clamping and loosening, thus improving the durability and reliability of the fixture head. Attached Figure Description

[0012] Figure 1 This is one of the perspective views of this utility model.

[0013] Figure 2 This is the second perspective view of this utility model.

[0014] Figure 3 This is the right view of this utility model.

[0015] Figure 4 This is a top view of the present invention.

[0016] Figure 5 yes Figure 4 A sectional view along line AA.

[0017] Figure 6 yes Figure 5 Enlarged view of part P in the image.

[0018] Figure 7 This is a bottom view of the present invention.

[0019] Explanation of reference numerals: 1-Clamp sleeve, 2-Clamp head, 3-First cavity, 4-Air inlet, 5-Air outlet, 6-Second cavity, 7-First gap, 8-Clamping part, 9-Drive mechanism, 10-Claw, 11-Mounting cavity, 12-Second gap, 13-First limiting surface, 14-Second limiting surface, 15-Sleeve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Conversely, this utility model covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined by the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail below; however, those skilled in the art can fully understand this utility model even without these detailed descriptions.

[0022] like Figure 1 and Figure 2 The fixture shown includes a fixture sleeve 1 fixedly installed on a machine tool and a fixture head 2 movably installed inside the fixture sleeve 1. It is mainly used on CNC lathes, machining centers and other equipment to automatically clean residual waste chips on the inner and outer surfaces of the fixture when machining the required parts.

[0023] like Figures 1 to 7 As shown, in this embodiment, both the clamp sleeve 1 and the clamp head 2 are cylindrical structures. A first cavity 3 is formed inside the clamp sleeve 1 along its own axial direction. The clamp head 2 is installed in the first cavity 3. The front end of the clamp head 2 is a clamping part 8, and a plurality of jaws 10 are provided on the clamping part 8. The number of jaws 10 can be set to 3 to 6 according to actual needs. Each jaw 10 has the same shape and structure and is distributed sequentially along the circumferential direction of the clamp head 2. A first gap 7 is formed between two adjacent jaws 10. A second cavity 6 is formed inside the clamp head 2 along its own axial direction. The front end of the second cavity 6 is a mounting cavity 11 for placing the workpiece. The mounting cavity 11 is located between the inner surfaces of the plurality of jaws 10.

[0024] The inner surface of the front end of the first cavity 3 is provided with a first limiting surface 13. The first limiting surface 13 is a conical surface, and the diameter of the first limiting surface 13 gradually decreases from the front end of the clamp sleeve 1 to the rear end of the clamp sleeve 1. The outer surface of the front end of the gripper 10 is provided with a second limiting surface 14 corresponding to the first limiting surface 13. The second limiting surface 14 is an inclined arc surface, and the second limiting surface 14 gradually inclines towards the axis of the clamp head 2 from the front end of the clamp head 2 to the rear end of the clamp head 2.

[0025] The rear end of the clamp head 2 is connected to a drive mechanism 9, which can be configured as a cylinder or a servo motor. Its output end is connected to a sleeve 15, which is connected to the rear end of the clamp head 2 and is used to drive the clamp head 2 to reciprocate along its own axial direction in the first cavity 3.

[0026] When the drive mechanism 9 drives the clamping head 2 to extend the clamping sleeve 1 along its own axial direction in the first cavity 3, since there is no clamping sleeve 1 to restrict the contraction of the grippers 10, each gripper 10 is in a relaxed state. At this time, the inner diameter of the mounting cavity 11 is adapted to the workpiece, and the workpiece can be easily placed into the mounting cavity 11 to complete the loading of the workpiece. When the drive mechanism 9 drives the clamping head 2 to extend into the clamping sleeve 1 along its own axial direction in the first cavity 3, the first limiting surface 13 on the inner surface of the clamping sleeve 1 contacts the second limiting surface 14 on the outer surface of the grippers 10, and restricts the contraction of the grippers 10 during the contact process, so that the width of the first gap 7 between each gripper 10 becomes smaller, thereby reducing the inner diameter of the mounting cavity 11, which can clamp and fix the workpiece. After the workpiece is processed, the drive mechanism 9 will drive the clamping head 2 to drive the workpiece to extend out of the clamping sleeve 1 along its own axial direction in the first cavity 3 to release the workpiece. By cooperating with manual or robotic arms, the unloading of the workpiece is completed.

[0027] The clamp head 2 has several second gaps 12 that correspond to and are connected to the rear end of the first gap 7 along its own radial direction. The several second gaps 12 are distributed sequentially along the circumferential direction of the clamp head 2. The width of the second gap 12 is greater than the width of the first gap 7, so as to facilitate the adjustment of the width of the first gap 7. This allows the gripper 10 to undergo elastic deformation when restricted and contracted, preventing the gripper 10 from fatigue fracture due to repeated clamping and loosening, thereby improving the durability and reliability of the clamp head 2.

[0028] During the processing of the workpiece, waste chips are generated. These chips easily stick to the inner and outer surfaces of the clamp sleeve 1 and the clamp head 2. The long-term accumulation of these chips will affect the clamping and fixing of the workpiece by the jaws 10, thus affecting the processing of the workpiece. Therefore, it is necessary to automatically clean the chips sticking to the inner and outer surfaces of the clamp sleeve 1 and the clamp head 2 during the processing and after the previous workpiece is processed.

[0029] In this embodiment, for cleaning up waste debris, firstly, an air inlet 4 and an air outlet 5 are provided inside the clamp sleeve 1 along its own radial direction. The first cavity 3 is connected to the air inlet 4 and the air outlet 5 respectively, and the first cavity 3 penetrates the clamp sleeve 1 along the axial direction. Both the air inlet 4 and the air outlet 5 penetrate the clamp sleeve 1 along the radial direction. A first air duct is formed from the air inlet 4, the first cavity 3 to the air outlet 5 for blowing debris from the inner surface of the clamp sleeve 1 and the outer surface of the clamp head 2. Secondly, a plurality of first gaps 7 are provided inside the clamp head 2 along its own radial direction. The plurality of first gaps 7 are distributed sequentially along the circumferential direction of the clamp head 2, and the first gaps 7 are connected to the first cavity 3 and the second cavity 6 respectively. The second cavity 6 penetrates the clamp head 2 along the axial direction, and the first gaps 7 penetrate the clamp head 2 along the radial direction. A second air duct is formed from the air inlet 4, the first cavity 3, the first gaps 7, the second cavity 6 to the air outlet 5 for blowing debris from the inner surface of the clamp head 2.

[0030] During or after workpiece processing, airflow enters from air inlet 4. Part of the airflow flows through the first cavity 3 and circulates there, blowing away the debris adhering to the inner surface of the fixture sleeve 1, the outer surface of the fixture head 2, and the outer surface of the gripper 10. Another part of the airflow flows through the first cavity 3 and into the second cavity 6 through the first gap 7 and the second gap 12, where it circulates and blows away the debris adhering to the inner surface of the fixture head 2, the inner surface of the gripper 10, and the workpiece surface. After cleaning, the debris flows out through air outlet 5 and is collected uniformly through the chip collection box connected to air outlet 5, ensuring the cleanliness of the fixture sleeve 1 and fixture head 2, maintaining the processing environment, and ensuring processing quality.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A clamp for automatically blowing away chips, comprising a clamp sleeve (1) and a clamp head (2), characterized in that, Inside the clamp sleeve (1), a first cavity (3) is provided along its own axial direction, and an air inlet (4) and an air outlet (5) are provided along its own radial direction. The first cavity (3) is connected to the air inlet (4) and the air outlet (5) respectively. The clamp head (2) is installed in the first cavity (3). Inside the clamp head (2), a second cavity (6) is provided along its own axial direction, and a plurality of first gaps (7) are provided along its own radial direction. The plurality of first gaps (7) are distributed sequentially along the circumferential direction of the clamp head (2), and the first gaps (7) are connected to the first cavity (3) and the second cavity (6) respectively. The front end of the clamp head (2) is set as a clamping part (8), and the rear end of the clamp head (2) is connected to a driving mechanism (9). The driving mechanism (9) is used to drive the clamp head (2) to reciprocate along its own axial direction in the first cavity (3).

2. The automatically de-chipping clamp according to claim 1, characterized in that, The first cavity (3) penetrates the clamp sleeve (1) in the axial direction. The air inlet (4) and the air outlet (5) both penetrate the clamp sleeve (1) in the radial direction. A first air duct for blowing debris from the air inlet (4), the first cavity (3) to the air outlet (5) is formed. The second cavity (6) penetrates the clamp head (2) in the axial direction. The first gap (7) penetrates the clamp head (2) in the radial direction. A second air duct for blowing debris from the air inlet (4), the first cavity (3), the first gap (7), the second cavity (6) to the air outlet (5) is formed.

3. The automatically de-chipping clamp according to claim 2, characterized in that, The clamping part (8) at the front end of the clamping head (2) is provided with a plurality of clamping jaws (10). The clamping jaws (10) are distributed sequentially along the circumferential direction of the clamping head (2). A first gap (7) is formed between two adjacent clamping jaws (10). The front end of the second cavity (6) is provided as a mounting cavity (11) for placing the workpiece. The mounting cavity (11) is located between the inner surfaces of the plurality of clamping jaws (10).

4. The automatically de-chipping clamp according to claim 3, characterized in that, The clamp head (2) has several second gaps (12) that correspond to and are connected to the rear end of the first gap (7) in its radial direction. The several second gaps (12) are distributed sequentially in the circumferential direction of the clamp head (2). The width of the second gap (12) is greater than the width of the first gap (7).

5. The automatically de-chipping clamp according to claim 4, characterized in that, The inner surface of the front end of the first cavity (3) is provided with a first limiting surface (13). The first limiting surface (13) is a conical surface, and the diameter of the first limiting surface (13) gradually decreases from the front end of the clamp sleeve (1) to the rear end of the clamp sleeve (1). The outer surface of the front end of the gripper (10) is provided with a second limiting surface (14) corresponding to the first limiting surface (13). The second limiting surface (14) is an inclined arc surface, and the second limiting surface (14) gradually inclines towards the axis of the clamp head (2) from the front end of the clamp head (2) to the rear end of the clamp head (2).

6. The self-debridable clamp of claim 5, wherein, The output end of the drive mechanism (9) is connected to a sleeve (15), which is connected to the clamp head (2).

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