Self-centering machining center tooling

Abstract

The utility model relates to tool fixture technical field, especially is involved in a kind of self-centering machining center tooling, including tool holder and the hydraulic assembly and spring clamp being set on tool holder, the hydraulic assembly drives spring clamp reciprocating movement, the tool holder includes processing plate, recess is equipped on the processing plate, spring clamp and recess inner wall form sliding fit, the inner bottom surface of recess and the inner wall of spring clamp form the clamping groove for clamping workpiece, when the hydraulic assembly drives spring clamp moves towards the direction close to recess inner bottom surface, spring clamp is towards radial contraction, when the hydraulic assembly drives spring clamp moves towards the direction away from recess inner bottom surface, spring clamp is towards radial expansion, the utility model is controlled axial parameter by clamping groove, clamping groove plays the clamping and positioning effect to workpiece, reduces repeated tool positioning, improves processing efficiency and processing quality.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a tooling for a self-centering machining center. Background Technology

[0002] A CNC machining center is a highly efficient automated machine tool composed of mechanical equipment and a CNC system, suitable for machining complex parts. CNC machining centers are among the world's most produced and widely used CNC machine tools. They possess strong comprehensive machining capabilities, allowing for the completion of numerous machining operations in a single workpiece setup.

[0003] Especially for shaft-type workpieces such as rotor seats, the requirements for tooling fixtures are also higher. Existing tooling fixtures can usually only ensure the firmness of the rotor seat being clamped, but cannot meet more parameter requirements, such as the control of axial parameters. Axial parameters, such as the total axial length of the rotor seat or the depth of the axial groove on the end face, require tool repositioning before axial machining, which greatly affects machining efficiency and machining quality. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a self-centering machining center fixture. This invention facilitates the control of the axial parameters of the workpiece through the clamping groove, reduces repeated tool setting and positioning, and improves machining efficiency and machining quality.

[0005] The technical solution adopted by this utility model is as follows: a self-centering machining center fixture, including a fixture support and a hydraulic component and a spring clamp mounted on the fixture support. The hydraulic component drives the spring clamp to reciprocate. The fixture support includes a machining plate with a groove. The spring clamp slides against the inner wall of the groove. The inner bottom surface of the groove and the inner wall of the spring clamp form a clamping groove for clamping the workpiece. When the hydraulic component drives the spring clamp to move towards the inner bottom surface of the groove, the spring clamp contracts radially. When the hydraulic component drives the spring clamp to move away from the inner bottom surface of the groove, the spring clamp expands radially.

[0006] The inner bottom surface of the groove has a raised axially machined layer for abutting the workpiece.

[0007] The axially machined layer is provided with clearance holes for the workpiece to extend into.

[0008] The spring clip includes at least three clamping claws, each of which has a clamping block protruding radially from its end.

[0009] The bottom surface of the groove is provided with at least three sets of mounting holes. Each set of mounting holes includes an opening for the clamping block to pass through and a slot for the clamping claw to be inserted. The opening and slot of the mounting holes in the same set are distributed circumferentially and connected.

[0010] The inner wall of the groove is provided with a conical surface corresponding to the slot, and the outer wall of the clamping block is provided with a conical inclined surface adapted to the conical surface.

[0011] The distance between the card slot and the inner wall of the groove is less than the thickness of the clamping block.

[0012] The processing plate is connected to a limiting block by a first fastener. The limiting block extends into the groove, and one of the clamping blocks is provided with a limiting groove for the limiting block to be inserted.

[0013] The tooling bracket also includes a base plate and a support plate. The hydraulic assembly includes a hydraulic cylinder and a hydraulic rod telescopically mounted on the hydraulic cylinder. The end of the hydraulic rod away from the hydraulic cylinder is connected to a spring clip via a second fastener.

[0014] The beneficial effects of this utility model are as follows: This utility model facilitates the control of the axial parameters of the workpiece through the clamping groove. The clamping groove plays a role in clamping and positioning the workpiece. The spring clamp is controlled by the hydraulic component to tighten the workpiece in the clamping groove, ensuring the firmness of the clamping. When the workpiece is placed in the clamping groove, it will fit against the inner bottom surface of the groove. The total axial length of the workpiece can be calculated by one tool setting. All parameters of the axial direction can be controlled during subsequent machining, resulting in higher machining accuracy. Furthermore, the flatness of the axial end face of the workpiece can be guaranteed, reducing repeated tool setting and positioning, and improving machining efficiency and quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the self-centering machining center tooling of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the workpiece removal method according to the present invention; Figure 4 This is a schematic diagram of the processing plate in this utility model; Figure 5 This is a schematic diagram of the spring clip in this utility model; In the figure, 1-tooling bracket, 2-hydraulic component, 3-spring clip, 4-processing plate, 5-groove, 6-clamping groove, 7-axial processing layer, 8-displacement hole, 9-clamping claw, 10-clamping block, 11-opening, 12-slot, 13-conical surface, 14-conical inclined surface, 15-first fastener, 16-limiting block, 17-limiting groove, 18-base plate, 19-support plate, 20-hydraulic cylinder, 21-hydraulic rod, 22-second fastener, 23-workpiece. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 5 As shown, this is an embodiment of the present invention. The self-centering machining center fixture includes a fixture support 1 and a hydraulic component 2 and a spring clamp 3 disposed on the fixture support 1. The hydraulic component 2 drives the spring clamp 3 to reciprocate. The fixture support 1 includes a machining plate 4, on which a groove 5 is provided. The spring clamp 3 forms a sliding fit with the inner wall of the groove 5. The inner bottom surface of the groove 5 and the inner wall of the spring clamp 3 form a clamping groove 6 for clamping the workpiece. When the hydraulic component 2 drives the spring clamp 3 to move toward the inner bottom surface of the groove 5, the spring clamp 3 contracts radially. When the hydraulic component 2 drives the spring clamp 3 to move away from the inner bottom surface of the groove 5, the spring clamp 3 expands radially.

[0021] The beneficial effects of this design are as follows: the clamping groove facilitates the control of the axial parameters of the workpiece. The clamping groove serves to clamp and position the workpiece. The spring clamp is controlled by a hydraulic component to tighten the workpiece 23 in the clamping groove, ensuring the firmness of the clamping. When the workpiece is placed in the clamping groove, it will fit against the inner bottom surface of the groove. The total axial length of the workpiece can be calculated in one tool setting. All parameters of the axial direction can be controlled during subsequent machining, resulting in higher machining accuracy. Furthermore, the flatness of the axial end face of the workpiece can be guaranteed, reducing repeated tool setting and positioning, and improving machining efficiency and quality.

[0022] Furthermore, the inner bottom surface of the groove 5 has an axially machined layer 7 for abutting against the workpiece.

[0023] The beneficial effects of this design are as follows: the inner bottom surface of the groove is thickened with an axial machining layer. The thickened axial machining layer can be milled by the tool multiple times. As the number of machining operations increases, the axial machining layer may be affected by wear or fine chips, affecting the flatness of the end face. The axial machining layer can be milled once before clamping the workpiece to ensure that the workpiece can fit flatly with the axial machining layer each time, thereby ensuring the accuracy of the machined workpiece.

[0024] Furthermore, the axial machining layer 7 is provided with a clearance hole 8 for the workpiece to extend into.

[0025] The beneficial effects of this design are as follows: when the workpiece is a rotor seat, it usually has a shaft, and the clearance hole allows the shaft to extend in, making it easier to clamp the workpiece.

[0026] In a further configuration, the spring clip 3 includes at least three clamping claws 9, each of which has a clamping block 10 protruding radially from its end.

[0027] The beneficial effects of this design are as follows: In this embodiment, the three clamping jaws are evenly distributed circumferentially to form a triangular force-applying structure. The three clamping jaws move concentrically radially to clamp the workpiece, achieving a self-centering function, that is, the workpiece is coaxial with the groove, and the workpiece can be clamped more firmly.

[0028] Furthermore, the bottom surface of the groove 5 is provided with at least three sets of mounting holes. Each set of mounting holes includes an opening 11 through which the clamping block 10 passes and a slot 12 into which the clamping claw 9 is embedded. The opening 11 and the slot 12 of the same set of mounting holes are distributed circumferentially and connected.

[0029] The advantages of this design are as follows: three sets of mounting holes correspond to three sets of clamping claws, allowing for the clamping claws to be installed and removed. The clamping block can be inserted into or extended out of the groove from the opening. The slot can only be used for the clamping claws to be inserted. First, insert the clamping block into the groove, and then insert the clamping claw into the slot by rotating the spring clip. This completes the installation of the spring clip. The structure is simple and easy to install and remove.

[0030] Furthermore, a conical surface 13 is provided on the inner wall of the groove 5 at the position corresponding to the slot 12, and a conical inclined surface 14 adapted to the conical surface 13 is provided on the outer wall of the clamping block 10.

[0031] The beneficial effects of this design are as follows: when the spring clip moves toward the bottom surface of the groove, the clamping block slides along the conical surface through the inclined conical surface, causing the clamping block to contract radially and expand in the opposite direction, thereby achieving clamping and releasing of the workpiece.

[0032] Furthermore, the distance between the card slot 12 and the inner wall of the groove 5 is less than the thickness of the clamping block 10.

[0033] The beneficial effects of this design are as follows: it expands the radial range of the clamping groove, allowing the workpiece to be smoothly inserted into the clamping groove when the clamping jaws expand, and it can tightly abut against the workpiece surface when the clamping jaws retract.

[0034] In a further configuration, a limiting block 16 is connected to the processing plate 4 via a first fastener 15. The limiting block 16 extends into the groove 5, and one of the clamping blocks 10 is provided with a limiting groove 17 for the limiting block 16 to be embedded in.

[0035] The beneficial effects of this design are as follows: In this embodiment, both the first and second fasteners are bolts of the prior art. The limiting block and the clamping block are matched with the limiting groove, which can prevent the clamping block from extending outside the groove and limit the axial movement range of the spring clamp.

[0036] Furthermore, the tooling bracket 1 also includes a base plate 18 and a support plate 19, and the hydraulic assembly 2 includes a hydraulic cylinder 20 and a hydraulic rod 21 telescopically mounted on the hydraulic cylinder 20. The end of the hydraulic rod 21 away from the hydraulic cylinder 20 is connected to the spring clip 3 through a second fastener 22.

[0037] The beneficial effects of this setup are as follows: the base plate is used for the installation and placement of hydraulic components; the base plate is connected to the processing plate through the support plate; and the hydraulic cylinder controls the extension and retraction of the hydraulic rod to drive the spring clamp to move back and forth.

[0038] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tooling for a self-centering machining center, characterized in that: The fixture includes a tooling bracket (1) and a hydraulic assembly (2) and a spring clamp (3) mounted on the tooling bracket (1). The hydraulic assembly (2) drives the spring clamp (3) to reciprocate. The tooling bracket (1) includes a processing plate (4). The processing plate (4) has a groove (5). The spring clamp (3) and the inner wall of the groove (5) form a sliding fit. The inner bottom surface of the groove (5) and the inner wall of the spring clamp (3) form a clamping groove (6) for clamping the workpiece. When the hydraulic assembly (2) drives the spring clamp (3) to move toward the inner bottom surface of the groove (5), the spring clamp (3) contracts radially. When the hydraulic assembly (2) drives the spring clamp (3) to move away from the inner bottom surface of the groove (5), the spring clamp (3) expands radially.

2. The self-centering machining center fixture according to claim 1, characterized in that: The inner bottom surface of the groove (5) has an axially machined layer (7) for abutting the workpiece.

3. The self-centering machining center fixture according to claim 2, characterized in that: The axially machined layer (7) is provided with clearance holes (8) for the workpiece to extend into.

4. The self-centering machining center fixture according to claim 1, characterized in that: The spring clip (3) includes at least three clamping claws (9), each of which has a clamping block (10) protruding radially at its end.

5. The self-centering machining center fixture according to claim 4, characterized in that: At least three sets of mounting holes are provided on the bottom surface of the groove (5). Each set of mounting holes includes an opening (11) through which the clamping block (10) passes and a slot (12) into which the clamping claw (9) is inserted. The opening (11) and the slot (12) of the same set of mounting holes are distributed circumferentially and connected.

6. The self-centering machining center fixture according to claim 5, characterized in that: The inner wall of the groove (5) is provided with a conical surface (13) corresponding to the slot (12), and the outer wall of the clamping block (10) is provided with a conical inclined surface (14) that matches the conical surface (13).

7. The self-centering machining center fixture according to claim 6, characterized in that: The distance between the card slot (12) and the inner wall of the groove (5) is less than the thickness of the clamping block (10).

8. The self-centering machining center fixture according to claim 4, characterized in that: The processing plate (4) is connected to a limiting block (16) by a first fastener (15), the limiting block (16) extends into the groove (5), and one of the clamping blocks (10) is provided with a limiting groove (17) for the limiting block (16) to be inserted.

9. The self-centering machining center fixture according to claim 1, characterized in that: The tooling bracket (1) also includes a base plate (18) and a support plate (19). The hydraulic assembly (2) includes a hydraulic cylinder (20) and a hydraulic rod (21) telescopically mounted on the hydraulic cylinder (20). The end of the hydraulic rod (21) away from the hydraulic cylinder (20) is connected to a spring clip (3) via a second fastener (22).

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