Metallographic grinding machine

Abstract

The metallographic grinding machine comprises a base, the base is rotationally connected with a grinding base plate, the grinding base plate is fixedly connected with a circle of outer edge, the outer edge is provided with a notch, the metallographic grinding machine further comprises a clamping ring, the position, close to a lower opening, of the inner wall of the clamping ring is fixedly connected with two opposite protruding blocks, and the bottom of the outer edge is fixedly connected with an arc-shaped spring piece. The middle of the spring piece is sunken downwards, and two feet of the spring piece are fixed to the bottom face of the outer edge. Abrasive paper is placed on the grinding base plate, the two protruding blocks of the clamping ring are aligned with the two notches in the outer edge of the grinding base plate respectively, the clamping ring is moved to enable the protruding blocks to penetrate through the notches so that the grinding base plate can be sleeved, the clamping ring is rotated, the side walls of the protruding blocks exert acting force on the side portions of the spring pieces, the spring pieces are compressed, and the protruding blocks penetrate through the side portions of the spring pieces to be ground. When the clamping ring moves to the position below the spring piece, the spring piece rebounds, downward acting force is generated on the upper bottom face of the protruding block, the clamping ring tightly presses the abrasive paper and the grinding base plate, and therefore the clamping ring and the abrasive paper are fixed to the grinding base plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to high-precision workpiece grinding technical field especially relates to a metallographic grinder. BACKGROUND

[0002] It is mainly used for grinding in high-precision plane, inner and outer cylindrical surface, conical surface, spherical surface, thread surface and other profile of workpiece.

[0003] The main types of metallographic grinder include disc grinder, rotating shaft grinder and various special grinding machines. The disc grinder is divided into single disc and double disc, and the double disc grinder is most commonly used. In the double disc grinder, multiple workpieces are placed in the clamping frame between the upper and lower grinding discs, and the clamping frame and the workpieces are driven by eccentric or planetary mechanism to move in parallel. The lower grinding disc rotates, and the upper grinding disc parallel to it can not rotate, or rotates reversely relative to the lower grinding disc, and can move up and down to press the workpiece (the pressure is adjustable).

[0004] Generally, the sandpaper is placed on the grinding disc, and then the collar is sleeved on the grinding disc to press the sandpaper. The collar is fixed on the grinding disc by the friction between the inner wall of the collar and the outer wall of the grinding disc, so that the sandpaper is pressed on the grinding disc, and the grinding disc drives the sandpaper to rotate to grind the workpiece. However, the fixing effect is not obvious, and the grinding disc and the sandpaper slip, which affects the grinding of the workpiece. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a metallographic grinder, which has the advantages of improving the fixing effect of the collar on the sandpaper.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] A metallographic grinder comprises a base, a grinding disc and a collar. The surface of the base is provided with a groove. The grinding disc is located in the groove of the base and is rotationally connected with the base. The edge of the grinding disc is fixedly connected with a ring-shaped outer edge. The outer edge is provided with a notch. Two symmetrical protrusions are fixedly connected with the inner wall of the collar near the lower opening. A spring sheet is fixedly connected with the bottom of the outer edge. The spring sheet is arc-shaped, and the middle part of the spring sheet is concave downward. The two feet of the spring sheet are fixedly connected with the bottom surface of the outer edge.

[0008] The technical scheme is adopted, the sandpaper is placed on the grinding base, the two protrusions of the clamping ring are respectively aligned with the two notches of the outer edge of the grinding base, the clamping ring is moved to make the protrusions pass through the notches, so that the grinding base is sleeved, the clamping ring is rotated, the side wall of the protrusion generates a force on the side of the spring sheet, the spring sheet is compressed, the protrusion moves to the lower side of the spring sheet after passing through the side of the spring sheet, the spring sheet rebounds to generate a downward force on the upper bottom surface of the protrusion, so that the clamping ring is pressed against the sandpaper and the grinding base, the clamping ring is pushed by the elastic force of the spring sheet, the force between the clamping ring and the grinding base is increased, the friction between the clamping ring and the grinding base is increased, the clamping ring and the grinding base are fixed more firmly, and the sandpaper is better limited.

[0009] Preferably, the outer wall of the clamping ring is provided with friction lines.

[0010] The technical scheme is adopted, the friction between the hand and the outer wall of the clamping ring is increased, and the clamping ring is better rotated.

[0011] Preferably, the base is provided with a water retaining ring at the grinding base.

[0012] The technical scheme is adopted, the cooling water used during grinding is prevented from splashing and flying to the base of the grinding machine, so that the grinding machine is damaged.

[0013] Preferably, the upper opening of the retaining ring is provided with a cover plate.

[0014] The technical scheme is adopted, dust is prevented from falling on the grinding base.

[0015] Preferably, the protrusion is made of rubber.

[0016] The technical scheme is adopted, the friction between the protrusion and the spring sheet is increased, and the fixing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a whole schematic view of the embodiment;

[0018] Fig. 2 It is a schematic view of the internal structure of the base;

[0019] Fig. 3 It is a connection schematic view of the grinding base and the clamping ring;

[0020] Fig. 4 It is an enlarged schematic view of A;

[0021] Fig. 5 It is an exploded schematic view of the grinding base.

[0022] Reference numerals: 1, base; 2, grinding tray; 3, collar; 4, outer edge; 5, notch; 6, protrusion; 7, spring piece; 8, friction pattern; 9, water baffle; 10, cover plate. DETAILED DESCRIPTION

[0023] The following description is only a preferred embodiment of the present application, the protection scope is not limited to the embodiment, any technical solution falling within the concept of the present application should fall within the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application should be considered as the protection scope of the present application.

[0024] See Figs. 1 to 5 A metallographic grinder comprises a base 1, a surface of the base 1 is provided with a groove, a water baffle 9 is placed on the groove to prevent the cooling water used in grinding from splashing onto the base 1 of the grinder and causing damage to the grinder, a grinding tray 2 is arranged in the groove, the grinding tray 2 is located in the water baffle 9 and is rotationally connected to the base 1, a cover plate 10 is placed at the opening of the upper portion of the water baffle to prevent dust from falling onto the grinding tray 2, and the grinder further comprises a collar 3, the outer wall of the collar 3 is provided with a friction pattern 8 to increase the friction between the hand and the outer wall of the collar 3 and better rotate the collar 3, an outer edge 4 is fixedly connected to the upper edge of the grinding tray 2, the outer edge 4 is provided with two symmetrical notches 5, two opposite protrusions 6 are fixedly connected to the inner wall of the collar 3 near the opening of the lower portion thereof, and a spring piece 7 is fixedly connected to the bottom of the outer edge 4, the spring piece 7 is arc-shaped, the middle portion of the spring piece 7 is concave downward, and the two feet of the spring piece 7 are fixedly connected to the bottom surface of the outer edge 4.

[0025] Working principle: place sandpaper on the grinding tray 2, align the two protrusions 6 of the collar 3 with the two notches 5 of the outer edge 4 of the grinding tray 2 respectively, move the collar 3 downward, drive the protrusions 6 to pass through the notches 5 and thereby cover the grinding tray 2, rotate the collar 3, the side wall of the protrusion 6 exerts a force on the side portion of the spring piece 7 to compress the spring piece 7, after the protrusion 6 passes through the side portion of the spring piece 7, the protrusion 6 moves below the spring piece 7, the spring piece 7 rebounds to exert a downward force on the upper bottom surface of the protrusion 6 to compress the sandpaper and the grinding tray 2, thereby fixing the collar 3 and the sandpaper on the grinding tray 2, the spring force of the spring piece 7 pushes the collar 3 to increase the force between the collar 3 and the grinding tray 2, thereby increasing the friction between the collar 3 and the grinding tray 2, making the fixation of the collar 3 and the grinding tray 2 more firm and better limiting the sandpaper, preventing the sandpaper and the grinding tray 2 from moving relatively when grinding a workpiece and affecting the grinding of the workpiece.

Claims

1. A metallographic grinder, comprising a base (1), a grinding disc (2) and a clamping ring (3), the surface of the base (1) is provided with a groove, the grinding disc (2) is located in the groove and is rotationally connected with the base (1), characterized in that, The grinding base (2) edge is fixedly connected with a circle of outer edge (4), the outer edge (4) is provided with notch (5), the inner wall of the collar (3) is fixedly connected with two opposite protrusions (6) near the lower opening, the bottom of the outer edge (4) is fixedly connected with spring leaf (7), the spring leaf (7) is arc-shaped, and the middle part of the spring leaf (7) is concave downward, and the two feet of the spring leaf (7) are fixedly connected with the bottom surface of the outer edge (4).

2. A metallographic polisher according to claim 1, wherein The outer wall of the collar (3) is provided with friction lines (8).

3. A metallographic polisher according to claim 2, wherein The base (1) is placed with a water baffle (9) at the grinding base (2), and the water baffle (9) is detachably connected with the base (1).

4. A metallographic polisher according to claim 3, wherein The upper opening of the water baffle (9) is placed with a cover plate (10).

5. The metallographic polisher of claim 1, wherein, The protrusion (6) is made of rubber material.

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