Grinding head clamp of machining center

Abstract

The utility model provides a machining center grinding head clamp which comprises a horizontally-arranged base body, a horizontally-arranged arc-shaped clamping opening is formed in one end of the base body and used for being connected with a grinding head in a clamping mode, and clamping blocks which are coplanar and hinged through a hinge shaft are arranged at the opening end of the clamping opening. The clamping blocks are symmetrically arranged and are elastically connected through springs; the clamping blocks are unfolded or folded through rotation of the clamping blocks; when the grinding head enters and exits from the clamping blocks, the clamping blocks are automatically opened; the springs are used for driving the clamping blocks to fold; the inner side of the clamping block is arc-shaped and has the same diameter as the inner wall of the bayonet; when the clamping blocks are folded, the inner sides of the clamping blocks and the inner sides of the bayonets form continuous major arcs. Due to the elastic arrangement of the clamping block, when the grinding head enters and exits from the bayonet, the clamping block can be automatically opened, so that the entering and exiting resistance of the grinding head is reduced, and the position of the grinding head cannot deviate.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a grinding head fixture for a machining center. Background Technique

[0002] When a machining center performs grinding work, due to the differences in the grinding parts and the parts to be ground, a variety of grinding heads are generally required. Therefore, a manipulator is set on the machining center to replace the grinding heads.

[0003] When the grinding head is not working, it is generally clamped on the fixture for the manipulator to grab. Conventional fixtures, as shown in Figure 5 , are provided with a U-shaped groove. The bottom of the groove is arc-shaped, and the two arms are parallel. The distance between the two arms is less than the diameter of the bottom of the groove. The arc shape of the bottom of the groove is used to match the grinding head. In this way, the grinding head needs to spread the two arms before it can be clamped into the bottom of the groove, which is not only laborious, but also causes the position of the grinding head to shift, making it difficult to accurately clamp into the bottom of the groove. Content of the Utility Model

[0004] To solve the technical problems in the background technique, the utility model discloses a grinding head fixture for a machining center.

[0005] The utility model provides a grinding head fixture for a machining center, which includes a horizontally arranged base body. One end of the base body is provided with a horizontally arranged arc-shaped bayonet for clamping the grinding head. The open end of the bayonet is provided with clamping blocks that are coplanar and hinged by a hinge shaft;

[0006] The clamping blocks are symmetrically arranged and are elastically connected by springs;

[0007] The clamping blocks are opened or closed by their rotation;

[0008] When the grinding head enters or exits between the clamping blocks, the clamping blocks automatically open;

[0009] The springs are used to drive the clamping blocks to close;

[0010] The inner sides of the clamping blocks are arc-shaped, and their diameters are the same as the inner wall of the bayonet;

[0011] When the clamping blocks are closed, their inner sides and the inner side of the bayonet form a continuous major arc.

[0012] The beneficial effects of the utility model are as follows: 1. The elastic setting of the clamping blocks enables the clamping blocks to automatically open when the grinding head enters or exits the bayonet, thereby reducing the resistance of the grinding head to enter and exit and preventing its position from shifting; 2. The inner sides of the clamping blocks and the inner side of the opening form a major arc, with a larger contact area with the grinding head and higher clamping stability; 3. When the bayonet contracts, it will form a pressure on the grinding head, thereby improving the position stability of the grinding head when it is clamped into the bayonet.

[0013] To improve the stability of the rotation of the clamping block, a further design is as follows: a horizontally arranged clamping groove is provided at the open end of the bayonet; one end of the clamping block is inserted into the clamping groove, and its upper and lower sides are in contact with the groove walls of the clamping groove.

[0014] If the clamping block is excessively contracted, it will be difficult for the grinding head to be clamped into the bayonet. Based on this, a further improvement lies in: the side surface of the bayonet is composed of a first inner arc surface, a first end surface, a first transition surface, and a first outer side surface connected in sequence; the first end surface and the first outer side surface are perpendicular; the first transition surface forms a 135° angle with the first end surface; the clamping block is provided with a second end surface corresponding to the first end surface and a second transition surface corresponding to the first transition surface; the hinge shaft is arranged near the connection of the first outer side surface and the first transition surface; when the clamping block is closed, if a grinding head is clamped in the bayonet, the first end surface and the second end surface are parallel and have a gap, the first transition surface and the second transition surface are parallel and have a gap, and a pressure is generated between the clamping block and the grinding head.

[0015] The specific installation structure of the spring is as follows: an installation groove connecting the clamping groove is provided at a position on the first outer side surface far from the first transition surface; the spring is arranged in the installation groove; one end of the spring is connected to the bottom of the installation groove, and the other end is connected to the clamping block.

[0016] If the spring is fixedly installed in the installation groove, the operating space is small and the difficulty is high. Based on this, a further improvement lies in: the part of the clamping block inserted into the clamping groove is set as the insertion part, and the part located outside the clamping groove is set as the clamping part; the hinge point of the clamping block is arranged on the insertion part and close to the clamping part; a fixing column is connected to the inner side of the open and closed end of the insertion part; a protruding support column is arranged at the bottom of the installation groove; both ends of the spring are respectively sleeved on the fixing column and the support column.

[0017] Generally, multiple fixtures are provided and arranged horizontally at intervals on the mounting rack, which has the following disadvantages: 1. The spacing error of the fixtures is large, resulting in difficulty for the manipulator to accurately grasp or place the grinding head; 2. The occupied space is large, which will lead to an increase in cost. Based on the above two points, a further improvement lies in: the base body is in a "+" shape, and four bayonets are provided and evenly distributed on the outside of the base body.

[0018] Since the bayonet is fixed, the length of its first inner arc surface directly affects the stability of clamping the grinding head. Based on this, a further improvement lies in: the first inner arc surface is in a semi-circular arc shape.

[0019] Since the inner side surfaces of the two clamping blocks form a constricted structure, when the grinding head is clamped into the bayonet, it will be blocked by the clamping blocks. Based on this, a further improvement lies in: the inner side of the clamping block is set as a second inner arc surface; the outer end of the second inner arc surface is sequentially connected with an outer end surface and a second outer side surface, so that the side surface of the clamping part is composed of a second inner arc surface, an outer end surface, a second outer side surface, a second transition surface, and a second end surface in sequence; the connection between the second inner arc surface and the outer end surface is transitioned through an inferior arc-shaped arc surface. Description of the Drawings

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is a structural schematic diagram of the present utility model, in which one clamping block is in a disengaged state;

[0022] Figure 2 is Figure 1 an enlarged view of part A in

[0023] Figure 3 is the front view of the present utility model;

[0024] Figure 4 is Figure 3 a cross-sectional view taken along B-B in

[0025] Figure 5 is the front view of a traditional grinding head fixture;

[0026] In the figure: 1, base body; 2, bayonet; 3, clamping block; 4, hinge shaft; 5, spring; 6, clamping groove; 7, mounting groove; 21, first inner arc surface; 22, first end face; 23, first transition surface; 24, first outer side surface; 31, second end face; 32, second transition surface; 33, insertion part; 34, clamping part; 35, fixing column; 36, second inner arc surface; 37, outer end face; 38, second outer side surface; 71, support column. Specific embodiments

[0027] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0028] As Figures 1-4 shown, the present utility model discloses a grinding head fixture for a machining center, including a horizontally arranged base body 1, the base body 1 forming a "+" shape, and a horizontally arranged circular arc bayonet 2 being provided at the end of each section thereof for clamping the grinding head.

[0029] The open end of the bayonet 2 is connected with a clamping block 3 which is coplanar and hinged by a hinge shaft 4. The clamping blocks 3 are symmetrically arranged and elastically connected by a spring 5. Its specific structure is as follows: a horizontally arranged clamping groove 6 is formed at the open end of the bayonet 2; the clamping block 3 is composed of an inserted part 33 and a clamping part 34 which are connected to each other. The inserted part 33 is inserted into the clamping groove 6, and the thickness of the clamping part 34 is the same as that of the base body 1 and is located outside the clamping groove 6. The side surface of the bayonet 2 is composed of a first inner arc surface 21, a first end surface 22, a first transition surface 23 and a first outer side surface 24 which are connected in sequence; the first end surface 22 and the first outer side surface 24 are perpendicular; the first transition surface 23 and the first end surface 22 form an angle of 135°. The clamping block 3 is provided with a second end surface 31 corresponding to the first end surface 22 and a second transition surface 32 corresponding to the first transition surface 23; the inner side of the clamping block 3 is set as a second inner arc surface 36; the outer end of the second inner arc surface 36 is sequentially connected with an outer end surface 37 and a second outer side surface 38, so that the side surface of the clamping part 34 is composed of a second inner arc surface 36, an outer end surface 37, a second outer side surface 38, a second transition surface 32 and a second end surface 31; the connection between the second inner arc surface 36 and the outer end surface 37 is transitioned by an inferior arc-shaped circular arc surface. In this way, when the grinding head is inserted into the bayonet 2, the transition circular arc surface plays a guiding role, so that the clamping block 3 automatically opens. The hinge shaft 4 is arranged near the connection between the first outer side surface 24 and the first transition surface 23; when the clamping block 3 is folded, if a grinding head is clamped in the bayonet 2, the first end surface 22 and the second end surface 31 are parallel and have a gap, the first transition surface 23 and the second transition surface 32 are parallel and have a gap, and a pressure is generated between the clamping block 3 and the grinding head. If there is no grinding head in the bayonet 2, the clamping block 3 continues to rotate inward until the connection point between the second end surface 31 and the second inner arc surface 36 abuts against the first end surface 22, and this position will not affect the grinding head entering the bayonet. An installation groove 7 connecting the clamping groove 6 is arranged at a position of the first outer side surface 24 far from the first transition surface 23; the spring 5 is arranged in the installation groove 7. The inner side of the opening and closing end of the inserted part 33 is connected with a fixed column 35; a protruding support column 71 is arranged at the bottom of the installation groove 7; the two ends of the spring 5 are respectively sleeved on the fixed column 35 and the support column 71.

[0030] The beneficial effects of the present utility model are as follows: 1. The elastic setting of the clamping block 3 enables the clamping block 3 to automatically open when the grinding head enters and exits the bayonet 2, thereby reducing the resistance of the grinding head to enter and exit and preventing its position from shifting; 2. The inner side of the clamping block 3 and the inner side of the opening form a superior arc shape, with a larger contact area with the grinding head and higher clamping stability; 3. When the bayonet 2 contracts, it will form a pressure on the grinding head, thereby improving the position stability of the grinding head when it is clamped in the bayonet 2; 4. The "+" shaped structure of the base body 1 enables the position accuracy of the four bayonets 2 to be higher, facilitating the manipulator to accurately grasp the grinding head.

[0031] Based on the above-mentioned ideal embodiments of the present utility model as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A grinding head fixture for a machining center, comprising a horizontally arranged base (1), one end of the base (1) is provided with a horizontally arranged arc-shaped bayonet (2) for clamping the grinding head, characterized in that: The opening end of the bayonet (2) is provided with a clamping block (3) which is coplanar and hinged via a hinge shaft (4); The clamping blocks (3) are arranged symmetrically and are elastically connected via springs (5); The clamping block (3) is opened or closed by rotating. When the grinding head moves in and out from between the clamping blocks (3), the clamping blocks (3) automatically open; The spring (5) is used to drive the clamping block (3) to collapse; The inner side of the clamping block (3) is in an arc shape, and its diameter is the same as the inner wall of the clamping port (2); When the clamping block (3) is folded, its inner side and the inner side of the clamping opening (2) form a continuous arc shape.

2. The grinding head fixture for a machining center according to claim 1, characterized in that: The opening end of the bayonet (2) is provided with a horizontally arranged clamping groove (6); One end of the clamping block (3) is inserted into the clamping groove (6), and the upper and lower sides thereof are in contact with the groove wall of the clamping groove (6).

3. The grinding head fixture for a machining center according to claim 2, characterized in that: The side surface at the bayonet (2) is composed of a first inner arc surface (21), a first end surface (22), a first transition surface (23) and a first outer side surface (24) which are connected in sequence; The first end surface (22) and the first outer side surface (24) are perpendicular; The first transition surface (23) and the first end surface (22) form an angle of 135°; The block (3) is provided with a second end surface (31) corresponding to the first end surface (22), and a second transition surface (32) corresponding to the first transition surface (23); The hinge shaft (4) is arranged near the connection between the first outer side surface (24) and the first transition surface (23); When the clamping block (3) is folded, if a grinding head is clamped in the clamping port (2), the first end surface (22) and the second end surface (31) are parallel and have a gap, the first transition surface (23) and the second transition surface (32) are parallel and have a gap, and pressure is generated between the clamping block (3) and the grinding head.

4. The grinding head fixture for a machining center according to claim 3, characterized in that: A mounting groove (7) connected to the clamping groove (6) is provided on the first outer side surface (24) at a position away from the first transition surface (23); The spring (5) is arranged in the mounting groove (7); One end of the spring (5) is connected to the bottom of the installation groove (7), and the other end is connected to the clamping block (3).

5. The grinding head fixture for a machining center according to claim 4, characterized in that: The portion of the clamping block (3) inserted into the clamping groove (6) is set as the inserting portion (33), and the portion located outside the clamping groove (6) is set as the clamping portion (34); The hinge point of the clamping block (3) is arranged at the plug-in portion (33) and is close to the clamping portion (34); A fixing column (35) is connected to the inner side of the opening and closing end of the plug-in portion (33); A raised support column (71) is provided at the bottom of the installation groove (7); The two ends of the spring (5) are respectively sleeved on the fixing column (35) and the supporting column (71).

6. The grinding head fixture for a machining center according to claim 1, characterized in that: The base (1) is in the shape of a "+" character, and the number of the bayonet holes (2) is four and evenly distributed on the outer side of the base (1).

7. The grinding head fixture for a machining center according to claim 3, characterized in that: The first inner arc surface (21) is in a semicircular arc shape.

8. The grinding head fixture for a machining center according to claim 5, characterized in that: The inner side of the clamping block (3) is configured as a second inner arc surface (36); The outer end of the second inner arc surface (36) is sequentially connected to an outer end surface (37) and a second outer side surface (38), so that the side surface of the clamping portion (34) is composed of the second inner arc surface (36), the outer end surface (37), the second outer side surface (38), the second transition surface (32) and the second end surface (31) which are sequentially connected; The connection between the second inner arc surface (36) and the outer end surface (37) is transitioned through a minor arc-shaped arc surface.

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