An adjustable cone-positioning automatic tool-changing grinding wheel chuck

Abstract

The utility model relates to an adjustable conical surface positioning automatic tool-changing grinding wheel chuck. The utility model includes a chuck body for sleeve installation of a grinding wheel, the chuck body includes a positioning hole arranged along the axial direction of the chuck body and used for the spindle to extend into and be positioned and connected, the positioning hole includes a positioning cone surface matched with the spindle cone surface; a broaching disc is detachably mounted on the chuck body, the broaching disc includes a broaching disc hole connected to the positioning hole, the broaching disc hole includes a first contact surface and a second contact surface; wherein, when the broaching rod is retracted, the broaching rod abuts against the first contact surface, so that the spindle can be pressed against the positioning cone surface; when the broaching rod is extended, the broaching rod abuts against the second contact surface, so that the spindle can be separated from the positioning cone surface. The utility model has a simple and reliable structure, low processing and manufacturing costs, and is relatively easy to implement.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheel chucks, in particular to an adjustable cone surface positioning automatic tool-changing grinding wheel chuck. Background Art

[0002] At present, there are generally two structures for connecting the grinding wheel spindle and the chuck of a vertical grinder: one is a manual method with end cover screw fixation and cone surface positioning, and the other is an automatic tool change method with HSK elastic broach shank, elastic hole and end face simultaneously positioned.

[0003] Manual method of fixing the end cover screws and positioning the cone surface: This method requires manual operation when replacing the grinding wheel chuck. The specific steps include removing the screws on the end cover connecting the grinding wheel chuck and the spindle, using special tools to detach the chuck from the connecting cone surface, then removing the old chuck and replacing it with a new one, and finally fixing the end cover screws. This process is particularly difficult when the grinding wheel is large, because the whole set of chucks is heavy, the labor intensity during the installation and disassembly process is high, and it also cannot meet the needs of automated production.

[0004] Automatic tool changing method with simultaneous positioning of HSK elastic broach handle, elastic hole and end face: This automatic grinding wheel changing method is suitable for lighter and higher-speed grinding wheel chucks. However, when the weight of the grinding wheel and chuck increases to 50Kg or more, the reliability is significantly reduced. At the same time, in order to ensure that the inner hole and the end face can still reliably contact at the same time after elastic deformation, the manufacturing difficulty of the chuck is greatly increased. Therefore, this structure has obvious limitations in the application of heavy-duty grinding wheel chucks. Summary of the invention

[0005] To this end, the utility model provides an adjustable conical positioning automatic tool-changing grinding wheel chuck, which realizes automatic tool changing through a tool pulling rod. It has a simple and reliable structure, low processing and manufacturing costs and is easy to implement. It avoids the high labor intensity and time consumption of traditional manual methods, and greatly improves production efficiency.

[0006] In order to solve the above technical problems, the utility model provides an adjustable conical surface positioning automatic tool changing grinding wheel chuck, which is used to be connected to the main shaft, the main shaft is telescopically connected with a broaching rod, and the grinding wheel chuck comprises:

[0007] A chuck body, used for sleeve mounting of a grinding wheel, the chuck body comprising a positioning hole arranged along the axial direction of the chuck body and used for the spindle to extend into and be positioned and connected, the positioning hole comprising a positioning conical surface matched with the conical surface of the spindle;

[0008] A broaching disc is detachably mounted on the chuck body, the broaching disc comprises a broaching disc hole connected to the positioning hole, and the broaching disc hole comprises a first contact surface and a second contact surface;

[0009] When the tool rod is retracted, the tool rod abuts against the first contact surface, so that the spindle can be pressed against the positioning conical surface; when the tool rod is extended, the tool rod abuts against the second contact surface, so that the spindle can be separated from the positioning conical surface.

[0010] In one embodiment of the present utility model, the first contact surface is a conical surface radially extending from the side wall of the broach disc hole, and the second contact surface is the bottom surface of the broach disc hole.

[0011] In one implementation of the utility model, the broach disc hole and the positioning hole are coaxially arranged.

[0012] In an embodiment of the present utility model, a mounting hole is axially extended from the positioning hole, and the broaching disc extends into the mounting hole.

[0013] In an embodiment of the present utility model, the mounting hole is a stepped hole, the broaching disc abuts against a step of the mounting hole and is connected to the broaching disc via a first connecting member.

[0014] In one embodiment of the utility model, a pressure cover is further included, and a positioning step is radially extended along the outer wall of the chuck body, and the pressure cover is used to press the grinding wheel against the positioning step.

[0015] In one implementation of the utility model, a gasket is provided between the positioning step and the pressure cover.

[0016] In one embodiment of the utility model, a mounting step extends radially along the outer wall of the chuck body, and the gland is connected to the mounting step via a second connecting member.

[0017] In one embodiment of the present invention, a mounting groove for mounting a balancing weight is provided on the axial end surface of the chuck body.

[0018] In one implementation of the utility model, the positioning cone surface adopts a 1:10 cone surface.

[0019] The above technical solution of the utility model has the following advantages compared with the prior art:

[0020] The utility model describes an adjustable conical surface positioning automatic tool-changing grinding wheel chuck, which adopts a large conical surface contact automatic tool-changing method for heavy-duty grinding wheel chucks, and has the characteristics of simple and reliable structure, low processing and manufacturing cost and easy implementation, stable performance, high precision and long service life, and ensures high rigidity, high precision and flexible adjustment convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0022] Figure 1 The utility model is a schematic diagram of the overall structure of an adjustable cone-surface positioning automatic tool-changing grinding wheel chuck.

[0023] Description of the Figures in the Specification:

[0024] 1. chuck body; 11. positioning hole; 12. positioning cone surface; 13. mounting hole; 14. positioning step; 15. mounting step;

[0025] 2. Grinding wheel;

[0026] 3. broaching plate; 31. broaching plate hole; 32. first contact surface; 33. second contact surface;

[0027] 4. Covering;

[0028] 5. Washer;

[0029] 6. A first connecting member;

[0030] 7. Second connecting piece;

[0031] 8. Balance weight;

[0032] 9. Installation slot. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0037] Reference Figure 1 As shown, the utility model is an adjustable conical surface positioning automatic tool changing grinding wheel chuck, which is used to be connected to the main shaft, the main shaft is telescopically connected with a broaching rod, and the grinding wheel chuck 2 includes:

[0038] A chuck body 1 is used for sleeve mounting of a grinding wheel 2, the chuck body 1 comprises a positioning hole 11 arranged along the axial direction of the chuck body 1 and used for the spindle to extend into and be positioned and connected, the positioning hole 11 comprises a positioning cone surface 12 matched with the cone surface of the spindle;

[0039] A broaching plate 3 is detachably mounted on the chuck body 1, wherein the broaching plate 3 comprises a broaching plate hole 31 connected to the positioning hole 11, and the broaching plate hole 31 comprises a first contact surface 32 and a second contact surface 33;

[0040] When the tool rod is retracted, the tool rod abuts against the first contact surface 32 so that the spindle can be pressed against the positioning conical surface 12; when the tool rod is extended, the tool rod abuts against the second contact surface 33 so that the spindle can be separated from the positioning conical surface 12.

[0041] It can be understood that the broaching rod is an HSK broaching rod, which is driven upward or downward by the oil cylinder in the spindle of the HSK broaching rod, and the driving force of the broaching cylinder is used to push the grinding wheel 2 chuck as a whole away from the conical surface of the spindle.

[0042] Automatic tool changing is achieved through the HSK tool puller, avoiding the high labor intensity and time consumption of the traditional manual method, greatly improving production efficiency.

[0043] In one embodiment, the first contact surface 32 is a conical surface radially extending from the side wall of the broaching plate hole 31 , and the second contact surface 33 is the bottom surface of the broaching plate hole 31 .

[0044] In one embodiment, the broaching hole 31 is coaxially arranged with the positioning hole 11 .

[0045] In one embodiment, a mounting hole 13 is axially extended from the positioning hole 11 , and the broaching disc 3 extends into the mounting hole 13 .

[0046] Specifically, the mounting hole 13 is a stepped hole, the broaching disc 3 abuts against the step of the mounting hole 13 and is connected to the broaching disc 3 via a first connecting member 6 (such as a screw).

[0047] The chuck body 1 and the broaching disc 3 are assembled in a separate structure, which makes it easy to adjust the installation size and position according to the upper and lower positions of the broaching rod, thereby reducing the processing difficulty.

[0048] In one embodiment, a pressure cover 4 is further included. A positioning step 14 is radially extended along the outer wall of the chuck body 1. After the grinding wheel 2 is installed on the outer circle of the chuck body 1, the pressure cover 4 is used to press the grinding wheel 2 against the positioning step 14.

[0049] In one embodiment, a gasket 5 is provided between the positioning step 14 and the pressure cover 4 , and the gasket 5 can be provided when the width of the grinding wheel 2 is not sufficient.

[0050] In one embodiment, a mounting step 15 is radially extended along the outer wall of the chuck body 1 , and the gland 4 is connected to the mounting step 15 via a second connecting member 7 (such as a screw).

[0051] In one embodiment, the axial end surface of the chuck body 1 is provided with a mounting groove 9 for mounting a balancing weight 8. The chuck body 1 can be provided with grooves for mounting multiple sets of balancing weights 8, and their positions on the chuck can be adjusted to reduce the unbalance of the grinding wheel 2 when the chuck rotates at high speed.

[0052] In one embodiment, the positioning cone surface 12 is a 1:10 cone surface, so that the diameter and length of the positioning cone surface are both large, so that the contact rigidity is good and the load-bearing capacity is strong after being connected with the main shaft.

[0053] Therefore, through the above-mentioned setting, the grinding wheel 2 chuck adopts the automatic tool changing method of large cone contact for the heavy grinding wheel 2 chuck, which has the characteristics of simple and reliable structure, low processing and manufacturing cost and easy implementation, stable performance, high precision and long service life, which not only ensures high rigidity, but also ensures high precision and flexible adjustment convenience.

[0054] The principle of the utility model is as follows: when the grinding wheel 2 chuck needs to be removed from the grinding spindle, the spindle is moved to the tool changing position, the broaching rod at the lower end of the spindle moves downward to press against the second contact surface 33 of the broaching disc 3, and an axial thrust is generated to disengage the positioning conical surface 12 of the chuck body 1 from the conical surface of the spindle, and the entire set of grinding wheel 2 chucks falls on the tool changing position, completing the automatic tool changing process.

[0055] When replacing the new grinding wheel 2 chuck, move the empty spindle to the upper tool position, move the spindle downward and insert it into the set position in the chuck positioning hole 11, and move the tool rod upward until it touches the first contact surface 32, and after the tightening signal is generated, the installation of the new grinding wheel 2 chuck is completed.

[0056] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An adjustable conical positioning automatic tool-changing grinding wheel chuck, used to be connected to a spindle, the spindle is telescopically connected to a broaching rod, characterized in that: The grinding wheel (2) chuck comprises: A chuck body (1) is used for sleeve-mounting a grinding wheel (2), the chuck body (1) comprising a positioning hole (11) arranged along the axial direction of the chuck body (1) and used for the spindle to extend into and be positioned and connected, the positioning hole (11) comprising a positioning conical surface (12) that matches the conical surface of the spindle; A broaching disc (3) is detachably mounted on the chuck body (1), the broaching disc (3) comprising a broaching disc hole (31) connected to the positioning hole (11), the broaching disc hole (31) comprising a first contact surface (32) and a second contact surface (33); When the tool rod is retracted, the tool rod abuts against the first contact surface (32), so that the main shaft can be pressed against the positioning conical surface (12); when the tool rod is extended, the tool rod abuts against the second contact surface (33), so that the main shaft can be separated from the positioning conical surface (12).

2. The adjustable cone-positioning automatic tool-changing grinding wheel chuck according to claim 1 is characterized in that: The first contact surface (32) is a conical surface extending radially from the side wall of the broaching tool disc hole (31), and the second contact surface (33) is the bottom surface of the broaching tool disc hole (31).

3. The adjustable cone-positioning automatic tool-changing grinding wheel chuck according to claim 1 is characterized in that: The broaching disc hole (31) is coaxially arranged with the positioning hole (11).

4. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 1, characterized in that: A mounting hole (13) is axially extended from the positioning hole (11), and the broaching disc (3) extends into the mounting hole (13).

5. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 4 is characterized in that: The mounting hole (13) is a stepped hole, the broaching disc (3) abuts against a step of the mounting hole (13) and is connected to the broaching disc (3) via a first connecting member (6).

6. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 1, characterized in that: It also comprises a pressure cover (4), a positioning step (14) extending radially along the outer wall of the chuck body (1), and the pressure cover (4) is used to press the grinding wheel (2) against the positioning step (14).

7. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 6, characterized in that: A gasket (5) is provided between the positioning step (14) and the pressure cover (4).

8. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 6, characterized in that: An installation step (15) extends radially along the outer wall of the chuck body (1), and the gland (4) is connected to the installation step (15) via a second connecting member (7).

9. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 1, characterized in that: An installation groove (9) for installing a balancing weight (8) is provided on the axial end surface of the chuck body (1).

10. The adjustable conical surface positioning automatic tool-changing grinding wheel chuck according to claim 1, characterized in that: The positioning conical surface (12) is a 1:10 conical surface.

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