Centering clamp for elliptical ring workpiece

Abstract

The utility model provides a centering fixture for an elliptical ring workpiece, which comprises a bottom plate and a centering mechanism, the bottom plate is provided with a screw hole, and the bottom surface of the bottom plate is provided with a groove containing the screw hole; the centering mechanism comprises a center block and two symmetrical sliding assemblies arranged on the two sides of the center block, the center block is of an isosceles trapezoid structure, the two equilateral sides of the center block are close to the sliding assemblies respectively, a center hole is formed in the center block, a center screw is installed in the screw hole, and the center screw is connected with the sliding assemblies. The center block is movably arranged on the center screw in a sleeved mode through the center hole, the small end face of the center block faces the bottom plate, and a pressing spring is arranged between the end face and the bottom plate. The center of the elliptical ring workpiece can be accurately positioned, and the use is very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a centering fixture for an elliptical ring workpiece. Background Art

[0002] When drilling holes in a tooling tool, the tooling tool is mounted on a fixture for fixation, and then the drill bit rotates to perform the drilling. When drilling holes in existing elliptical ring workpieces, it is often necessary to accurately locate the center of the elliptical ring for symmetrical drilling, but existing fixtures do not have the function of locating the center of the elliptical ring. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a centering fixture for an elliptical ring workpiece, which can accurately locate the center of the elliptical ring workpiece and is very convenient to use.

[0004] In order to achieve the purpose of this utility model, the technical solution adopted by this utility model is:

[0005] A centering fixture for an elliptical ring workpiece comprises a base plate and a centering mechanism, the base plate being provided with a screw hole, the bottom surface of the base plate being provided with a groove containing the screw hole, and the position of the centering mechanism corresponding to the groove; the centering mechanism comprising a center block and two symmetrical sliding components arranged on both sides of the center block, the movement directions of the two sliding components being in a straight line, the center block being an isosceles trapezoidal structure, and two equal sides being close to one of the sliding components respectively, the center block being provided with a center hole, a center screw being installed on the screw hole, the center block being movably mounted on the center screw through the center hole, the aperture of the center hole being smaller than the nut of the center screw, the smaller end face of the center block facing the base plate, and a pressing spring being provided between the end face and the base plate.

[0006] The sliding assembly of the utility model includes a slide groove and a sliding part. The sliding assembly includes a slide groove and a sliding part. A slide groove penetrating the bottom plate is provided on each side of the screw hole. The two slide grooves are located in a straight line. A sliding part is provided on the slide groove. The bottom of the sliding part is connected to a sliding rod. The sliding rod passes through the slide groove, and the protruding end is connected to a card block.

[0007] Preferably, the sliding member includes a slider and a cross bar, one end of the slider is close to the center block, the other end of the slider is connected to the center of the cross bar, and the cross bar is perpendicular to the sliding groove.

[0008] Further preferably, both end surfaces of the crossbar are arc surfaces adapted to the inner side wall of the elliptical ring workpiece.

[0009] Preferably, the sliding rod is a sliding screw, and the blocking block is a nut of the sliding screw.

[0010] The upper end surface of the central block of the utility model is provided with an accommodating groove for accommodating the nut.

[0011] The two sides of the two sliding components of the utility model are respectively connected by a return spring.

[0012] Preferably, the contact surface between the sliding assembly and the center block is matched with the center block.

[0013] The beneficial effects of the present invention are:

[0014] 1. Press the center block downward. Since the smaller end face of the isosceles trapezoid is facing downward, the downward movement of the center block will push the two symmetrical sliding components to slide to both sides at the same speed until both sliding components are against the inner wall of the elliptical ring workpiece. At this time, the screw position is the center of the elliptical ring workpiece. Tighten the screw downward, and the elliptical ring workpiece is supported and positioned by the two sliding components.

[0015] 2. The two sliding components are connected on both sides by a return spring, so that the two sliding components always keep in contact with the center block, making it smoother to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the centering fixture for an elliptical ring workpiece of the present invention.

[0017] Figure 2 This is a top view of the base plate of Example 2.

[0018] Figure 3 This is a schematic diagram of the use state of the centering fixture of the elliptical ring workpiece of the utility model.

[0019] Figure 4 Schematic diagram of the use status of the centering fixture of the elliptical ring workpiece in Example 5.

[0020] The markings in the figure are: 1. Base plate, 2. Center block, 3. Sliding assembly, 4. Center screw, 5. Sliding rod, 6. Press spring, 7. Elliptical ring workpiece, 8. Return spring, 9. Connecting rod, 11. Screw hole, 12. Groove, 21. Center hole, 22. Receiving groove, 31. Slider, 32. Cross bar, 41. Nut, 51. Block, 71. Punch. DETAILED DESCRIPTION

[0021] In order to more clearly and in detail illustrate the purpose and technical solution of the utility model, the utility model is further described below through relevant embodiments. The following embodiments are only for the purpose of specifically illustrating the implementation method of the utility model and do not limit the scope of protection of the utility model.

[0022] Example 1

[0023] like Figure 1 As shown, a centering fixture for an elliptical ring workpiece includes a base plate 1 and a centering mechanism, the base plate 1 is provided with a screw hole 11, and the bottom surface of the base plate 1 is provided with a groove 12 containing the screw hole 11, and the position of the centering mechanism corresponds to the groove 12; the centering mechanism includes a center block 2 and two symmetrical sliding components 3 arranged on both sides of the center block 2, and the movement directions of the two sliding components 3 are in a straight line, the center block 2 is an isosceles trapezoidal structure, and two equal sides are close to one of the sliding components 3, the center block 2 is provided with a center hole 21, and a center screw 4 is installed on the screw hole 11, the center block 2 is movably mounted on the center screw 4 through the center hole 21, the aperture of the center hole 21 is smaller than the nut 41 of the center screw 4, the smaller end face of the center block 2 faces the base plate 1, and a pressing spring 6 is provided between the end face and the base plate 1.

[0024] like Figure 3 As shown, an elliptical ring workpiece 7 is placed on base plate 1, with the centering mechanism located within the workpiece. Pressing down on center block 2, due to the smaller end surface of the isosceles trapezoid facing downward, the downward movement of center block 2 pushes two symmetrical sliding assemblies 3 to slide radially along the elliptical ring at the same speed, until both sliding assemblies 3 abut against the inner sidewall of the elliptical ring workpiece 7. At this point, center screw 4 is the center of the elliptical ring workpiece 7. Tighten center screw 4 downward to prevent center block 2 from resetting. The two sliding assemblies 3 are fixed in position, and the elliptical ring workpiece 7 is supported and positioned by the two sliding assemblies 3. Punching can then begin.

[0025] Example 2

[0026] This embodiment is based on embodiment 1:

[0027] like Figure 1 and Figure 2 As shown, the sliding assembly 3 includes a slide groove 13 and a sliding member. A slide groove 13 penetrating the base plate 1 is provided on each side of the screw hole 11. The two slide grooves 13 are located in a straight line. A sliding member is provided on the slide groove 13. The bottom of the sliding member is connected to a slide rod 5. The slide rod 5 passes through the slide groove 13, and the protruding end is connected to a block 51.

[0028] The sliding assembly 3 of this embodiment is realized by the cooperation of the sliding groove 13 and the sliding member, and can also be realized by a sliding rail. As long as the method can realize sliding, it is applicable to the present invention.

[0029] Example 3

[0030] This embodiment is based on embodiment 2:

[0031] The sliding member includes a slider 31 and a crossbar 32. One end of the slider 31 is close to the center block 2, and the other end of the slider 31 is connected to the center of the crossbar 32. The crossbar 32 is perpendicular to the slide groove 13. The sliding member of this structure has a better supporting effect on the elliptical ring workpiece.

[0032] The sliding rod 5 is a sliding screw, and the clamping block 51 is a nut of the sliding screw.

[0033] Example 4

[0034] This embodiment is based on embodiment 2:

[0035] The two end surfaces of the crossbar 32 are arc surfaces adapted to the inner side wall of the elliptical ring workpiece 7 , which provide better stability for supporting the elliptical ring workpiece.

[0036] The upper end surface of the center block 2 is provided with a receiving groove 22 for receiving the nut 41 , which is more conducive to tightening the screw.

[0037] Example 5

[0038] This embodiment is based on embodiment 1:

[0039] like Figure 4 As shown, the two sides of the two sliding components 3 are respectively connected by a return spring 8. The two sliding components 3 are always kept pressing the center block 2 inward, and the sliding components 3 abut against the center block 2, which makes the use smoother.

[0040] The contact surface between the sliding component 3 and the center block 2 is matched with the center block 2, which is more conducive to smooth sliding.

[0041] The connection methods not mentioned in the present invention are welding, clamping, riveting, hinged connection, threaded connection or bonding.

[0042] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A centering fixture for an elliptical ring workpiece, characterized in that: It includes a base plate and a centering mechanism, the base plate is provided with a screw hole, the bottom surface of the base plate is provided with a groove containing the screw hole, and the position of the centering mechanism corresponds to the groove; the centering mechanism includes a center block and two symmetrical sliding components arranged on both sides of the center block, the movement directions of the two sliding components are in a straight line, the center block is an isosceles trapezoidal structure, and the two isosceles surfaces are respectively close to one of the sliding components, the center block is provided with a center hole, and a center screw is installed on the screw hole. The center block is movably mounted on the center screw through the center hole, the aperture of the center hole is smaller than the nut of the center screw, the smaller end face of the center block faces the base plate, and a pressing spring is provided between the end face and the base plate.

2. The centering fixture for an elliptical ring workpiece according to claim 1, characterized in that: The sliding assembly includes a sliding groove and a sliding part. A sliding groove penetrating the bottom plate is provided on each side of the screw hole. The two sliding grooves are located in a straight line. A sliding part is provided on the sliding groove. The bottom of the sliding part is connected to a sliding rod. The sliding rod passes through the sliding groove, and the protruding end is connected to a card block.

3. The centering fixture for an elliptical ring workpiece according to claim 2, characterized in that: The sliding member includes a slider and a cross bar, one end of the slider is close to the center block, the other end of the slider is connected to the center of the cross bar, and the cross bar is perpendicular to the sliding groove.

4. The centering fixture for an elliptical ring workpiece according to claim 3, characterized in that: The two end surfaces of the cross bar are arc surfaces adapted to the inner side wall of the elliptical ring workpiece.

5. The centering fixture for an elliptical ring workpiece according to claim 2, characterized in that: The sliding rod is a sliding screw, and the clamping block is a nut of the sliding screw.

6. The centering fixture for an elliptical ring workpiece according to claim 1, characterized in that: The upper end surface of the center block is provided with an accommodating groove for accommodating the nut.

7. The centering fixture for an elliptical ring workpiece according to claim 1, characterized in that: The two sides of the two sliding assemblies are respectively connected via a return spring.

8. The centering fixture for an elliptical ring workpiece according to claim 7, characterized in that: The contact surface between the sliding assembly and the center block is matched with the center block.

Images