Inner-expanding fixture for disc-shaped parts with central holes and multi-station clamping device

Abstract

The present invention discloses an internal expansion type fixture and a multi-station clamping device for disc-shaped parts with a central hole. The internal expansion type fixture includes a base, on which a support assembly for supporting the part and a central hole expansion sleeve for passing through the central hole of the part to expand and loosen the part are installed. The support assembly includes a plurality of support bosses connected to the base, and there is a chip removal space located between the part and the base when the part is supported on the support bosses between the plurality of support bosses and the central hole expansion sleeve. The multi-station clamping device includes a four-axis turntable and a base installed on the four-axis turntable, and a plurality of internal expansion type fixtures for disc-shaped parts with a central hole are installed on the base. The present invention has the advantages of smooth chip removal, being conducive to improving the machining accuracy and product quality, and improving the machining efficiency, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and particularly relates to an internal expansion jig for disk-shaped parts with a central hole and a multi-station clamping device. Background Art

[0002] When producing disk-shaped parts with a central hole such as a motor brake groove disk, it is often necessary to machine one or more structures such as a central hole, an annular groove, a threaded through hole, a blind hole, a counterbore, an outer side notch, an inner side notch, and a side hole (the side hole communicates with the outer side notch and the inner side notch). During the machining process, it is necessary to first use a jig to clamp and position the part and then perform machining.

[0003] The internal expansion jig is a commonly used jig for clamping and positioning parts. It mainly includes a support seat for supporting and positioning the part and a central hole expansion sleeve that can be inserted into the central hole of the part to expand and loosen the part. When in use, the part is supported and positioned on the support seat, the central hole expansion sleeve is inserted into the central hole of the part, and the part is expanded and tightened by the internal expansion of the central hole expansion sleeve, so as to realize the clamping and positioning of the part. When the central hole expansion sleeve loosens the part, the clamping and positioning of the part can be released, so that the part can be loaded and unloaded. However, in the existing internal expansion jigs, their support seats all adopt a closed structure, and there is no chip removal space on the side of the part corresponding to the support seat, resulting in problems such as unsmooth chip removal and easy chip accumulation. Furthermore, it will cause problems such as affecting the machining accuracy, resulting in unqualified products, affecting the clamping of the robot, and damaging the surface (indentation). And when machining a through hole or groove on the part, there is no tool avoidance space, and it is necessary to turn the part over and re-clamp and position it to complete the machining of the through hole or groove, resulting in low machining efficiency, and the re-clamping and positioning of the part will also have an adverse impact on the machining accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology and provide an internal expansion jig for disk-shaped parts with a central hole and a multi-station clamping device that has smooth chip removal, is conducive to improving machining accuracy and product quality, and improves machining efficiency.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An internal expansion jig for disk-shaped parts with a central hole, including a base, a support assembly for supporting the part is installed on the base, and a central hole expansion sleeve for being inserted into the central hole of the part to expand and loosen the part. The support assembly includes a plurality of support bosses connected to the base, and there is a chip removal space located between the part and the base when the part is supported on the support bosses between the plurality of support bosses and the central hole expansion sleeve.

[0007] As a further improvement of the above internal expansion jig for disk-shaped parts with a central hole:

[0008] A plurality of the supporting bosses are arranged at intervals around the center hole expanding sleeve, and there is a gap between each supporting boss and the center hole expanding sleeve.

[0009] The base has a mounting surface, the center hole expanding sleeve is mounted in the middle of the mounting surface, the supporting bosses are protruding members protruding from the mounting surface, and the mounting surface extends from the middle to the periphery in the direction opposite to the protruding direction of the supporting bosses.

[0010] The mounting surface is a conical surface.

[0011] The supporting boss has a supporting plane for supporting a part and a plugging positioning post protruding from the supporting plane, and the plugging positioning post is used for inserting into a preset hole on the part to position the part.

[0012] One end of the plugging positioning post away from the supporting plane is provided with a spherical head or a conical head that is easy to insert into the hole.

[0013] A multi-station clamping device includes a four-axis turntable and a base mounted on the four-axis turntable. A plurality of clamps for clamping and fixing parts are mounted on the base, and the clamps are the internal expanding clamps for disk-shaped parts with a center hole as described above.

[0014] As a further improvement of the above multi-station clamping device:

[0015] The bases of the internal expanding clamps for disk-shaped parts with a center hole are detachably mounted on the base.

[0016] The base is provided with positioning through holes, and the base is received and positioned in the positioning through holes and is connected and fixed to the base through fasteners.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] For the internal expanding clamp for disk-shaped parts with a center hole of the present invention, the supporting component for supporting and positioning the part adopts the form of a plurality of supporting bosses. There is a chip removal space between the plurality of supporting bosses and the center hole expanding sleeve, which is located between the part and the base when the part is supported on the supporting bosses. The chip removal space can supply the chips generated during processing to be discharged, making chip removal more convenient and smooth, not easy to accumulate chips, avoiding problems such as affecting the machining accuracy, resulting in unqualified products, affecting the robot gripping, and damaging the surface (indentation). At the same time, the space between the plurality of supporting bosses can also provide a space for avoiding the tool, facilitating the one-time machining of a through hole or groove, without the need to turn the part over and re-clamp and position, and can improve the machining efficiency and machining accuracy.

[0019] Since the multi-station clamping device of the present invention adopts the internal expanding clamp for disk-shaped parts with a center hole of the present invention, it also has the advantages of the internal expanding clamp for disk-shaped parts with a center hole. Brief Description of the Drawings

[0020] Figure 1 Fig. 1 is a perspective structural view of an internal expansion fixture when clamping a part.

[0021] Figure 2 Fig. 2 is a perspective structural view of the internal expansion fixture when not clamping a part.

[0022] Figure 3 Fig. 3 is a top view structural view of the internal expansion fixture when not clamping a part.

[0023] Figure 4 Fig. 4 is a perspective structural view of a multi-station clamping device.

[0024] Legend:

[0025] 1. Base; 11. Mounting surface; 2. Central hole expanding sleeve; 3. Support boss; 31. Support plane; 4. Chip removal space; 5. Four-axis turntable; 6. Base. Detailed Embodiment

[0026] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0027] Embodiment 1:

[0028] As shown in Figures 1 to 3 Fig. 1, the internal expansion fixture for disk-shaped parts with a central hole in this embodiment includes a base 1. A support assembly for supporting the part and a central hole expanding sleeve 2 for passing through the central hole of the part to expand and release the part are installed on the base 1. The support assembly includes a plurality of support bosses 3 connected to the base 1. There is a chip removal space 4 between the plurality of support bosses 3 and the central hole expanding sleeve 2, which is located between the part and the base 1 when the part is supported on the support bosses 3. For the internal expansion fixture for disk-shaped parts with a central hole, the support assembly for supporting and positioning the part adopts the form of a plurality of support bosses 3. There is a chip removal space 4 between the plurality of support bosses 3 and the central hole expanding sleeve 2, which is located between the part and the base 1 when the part is supported on the support bosses 3. The chip removal space 4 can discharge the chips during processing, making chip removal more convenient and smooth, not easy to accumulate chips, and avoiding problems such as affecting the machining accuracy, resulting in unqualified products, affecting the gripper of the robot, and damaging the surface (indentation). At the same time, the space between the plurality of support bosses 3 can also provide a space for avoiding the tool, facilitating the one-time machining of through holes or grooves, without the need to turn over and re-clamp and position the part, which can improve the machining efficiency and machining accuracy.

[0029] In this embodiment, a plurality of supporting bosses 3 are arranged at intervals around the center-hole expanding sleeve 2, and there is a gap between each supporting boss 3 and the center-hole expanding sleeve 2. When the part is supported on the supporting bosses 3, a chip removal space 4 is formed among the plurality of supporting bosses 3, the base 1 and the part. A chip removal space is formed between any two adjacent supporting bosses 3. At the same time, the gaps between each supporting boss 3 and the center-hole expanding sleeve 2 communicate with the chip removal space, which is conducive to the discharge of chips. At the same time, the plurality of supporting bosses 3 are arranged at intervals in the form of an annular path to support the part, which not only has a simple structure, stable and reliable support, but also facilitates the avoidance of the tool when machining a through hole or groove.

[0030] In this embodiment, the base 1 has a mounting surface 11, the center-hole expanding sleeve 2 is installed in the middle of the mounting surface 11, the supporting boss 3 is a protruding member protruding from the mounting surface 11, and the mounting surface 11 extends from the middle to the periphery in the direction opposite to the protruding direction of the supporting boss 3, so that chips can be discharged to the outside of the base 1 by the action of gravity, and the space between the part and the mounting surface 11 gradually increases along the chip discharge direction, increasing the smoothness of chip discharge.

[0031] In this embodiment, the mounting surface 11 is a conical surface, which is convenient for processing and manufacturing.

[0032] In this embodiment, the supporting boss 3 has a supporting plane 31 for supporting the part and a plug-in positioning post (not shown in the figure) protruding from the supporting plane 31. The plug-in positioning post is used to insert into a preset hole on the part to position the part. By inserting the plug-in positioning post into the preset hole on the part, the rotation of the part around the center-hole expanding sleeve 2 can be prevented, which plays a role in stopping rotation and positioning the angle, thereby improving the accuracy of subsequent processing.

[0033] In this embodiment, the end of the plug-in positioning post away from the supporting plane 31 is set as a spherical head or a conical head that is easy to insert into the hole, which is convenient for the plug-in positioning post to insert into the preset hole on the part.

[0034] Embodiment 2:

[0035] As Figure 4 shown, the multi-station clamping device of this embodiment includes a four-axis turntable 5 and a base 6 installed on the four-axis turntable 5. A plurality of clamps for clamping and fixing parts are installed on the base 6, and the clamps are the inner expanding clamps for disk-shaped parts with a center hole in Embodiment 1. Since the multi-station clamping device adopts the inner expanding clamp for disk-shaped parts with a center hole in Embodiment 1, it also has the advantages of the inner expanding clamp for disk-shaped parts with a center hole.

[0036] In this embodiment, the base 1 of the internal expansion fixture for each disc-shaped part with a central hole is detachably mounted on the base 6. In this way, the internal expansion fixture for a single disc-shaped part with a central hole can adopt a modular design and preparation scheme, and the internal expansion fixture with different specifications of the support assembly and the central hole expansion sleeve 2 can be quickly replaced to apply to different specifications of parts without replacing the base 6, achieving the improvement of the applicable range while reducing costs and improving the replacement efficiency.

[0037] In this embodiment, a positioning through hole is provided on the base 6, and the base 1 is received and positioned in the positioning through hole and connected and fixed to the base 6 through fasteners. The base 1 is inserted and positioned in the positioning through hole, which forms the installation and positioning of the base 1. The installation is stable and reliable. When designing and preparing the internal expansion fixture modularly, the external dimensions of the bases 1 of different specifications of internal expansion fixtures can be unified, so that the position accuracy can be ensured without debugging during replacement, greatly reducing the replacement difficulty and saving workload, and improving the replacement efficiency.

[0038] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art of this technology, the improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An internal expansion fixture for disc-shaped parts with a central hole, comprising a base (1), a support assembly for supporting the part is installed on the base (1), and a central hole expansion sleeve (2) for passing through the central hole of the part to expand and loosen the part, characterized in that: The support assembly includes a plurality of support bosses (3) connected to the base (1), and there is a chip evacuation space (4) between the plurality of support bosses (3) and the center hole expanding sleeve (2), which is located between the part and the base (1) when the part is supported on the support bosses (3); The plurality of support bosses (3) are arranged at intervals around the center hole expanding sleeve (2), and there is a gap between each support boss (3) and the center hole expanding sleeve (2); The base (1) has a mounting surface (11), the center hole expanding sleeve (2) is mounted in the middle of the mounting surface (11), the support bosses (3) are protruding members protruding from the mounting surface (11), and the mounting surface (11) extends from the middle to the periphery in the direction opposite to the protruding direction of the support bosses (3); The support boss (3) has a support plane (31) for supporting the part and a plug-in positioning post protruding from the support plane (31), and the plug-in positioning post is used to insert into a preset hole on the part to position the part.

2. The internal expansion type fixture for disk-like parts with a central hole according to claim 1, characterized in that: The mounting surface (11) is a conical surface.

3. The internal expansion type fixture for disc-shaped parts with a central hole according to claim 1, characterized in that: One end of the plug-in positioning post away from the support plane (31) is provided with a spherical head or a conical head that is easy to insert into the hole.

4. A multi-station clamping device, comprising a four-axis turntable (5) and a base (6) mounted on the four-axis turntable (5), wherein a plurality of clamps for clamping and fixing parts are mounted on the base (6), and the feature is that: The fixture is an internal expanding fixture for a disk-like part with a center hole as described in any one of claims 1 to 3.

5. The multi-station clamping device according to claim 4, characterized in that: The base (1) of each internal expanding fixture for a disk-like part with a center hole is detachably mounted on the base (6).

6. The multi-station clamping device according to claim 5, wherein: The base (6) is provided with a positioning through hole, and the base (1) is received and positioned in the positioning through hole and is fixedly connected to the base (6) through a fastener.

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