Airtight clamp structure of flange drilling machine

Abstract

The utility model relates to an airtight fixture structure of a flange drilling machine, which comprises a fixture base and a plurality of chuck pressing claws, the plurality of chuck pressing claws are uniformly distributed around the axis of the fixture base and are radially connected to the fixture base in a sliding manner, and each chuck pressing claw is provided with a flange supporting surface. An airtight hole is formed in the flange supporting face and communicated with a center air channel in the clamp base through a pressing claw air channel. According to the clamp, the airtight hole is formed in the contact surface of the chuck pressing claw and the flange, so that the airtight hole synchronously moves along with the chuck pressing claw to adapt to the size of the flange, the clamp does not need to be replaced tediously, convenience and rapidness are achieved, the universality is high, the production efficiency can be improved, and the production cost can be reduced; the pressing degree of the flange on the clamp is guaranteed through the airtight holes.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to an airtight clamp structure of a flange drilling machine. Background Art

[0002] The prior art disclosed by the current clamp, as shown in the Chinese patent document, "A clamp for processing the inner ring of the flange", patent number CN201922197346.6, mainly includes a base, three concentric positioning seats and three concentric claw seats are evenly installed on the base, and a claw is installed on each claw seat. An airtight hole is opened on the upper surface of the positioning seat, and the airtight hole is connected to the air inlet hole on the base through an air duct. In this prior art, the airtight hole is indirectly fixed on the base through the positioning seat, so that the airtight hole cannot be adjusted at any time according to the diameter of the flange, and the position of the positioning seat can only be adjusted again or the positioning seat can be replaced. Therefore, the applicant provides a new solution to the above-mentioned technical problems through further improvement and perfection of the structure for consumers to choose and use. Summary of the invention

[0003] The purpose of the utility model is to solve the above-mentioned existing problems and provide a simple and reasonable airtight fixture structure for a flange drilling machine, the main function of which is to make the airtight hole move synchronously with the chuck pressure claw to adapt to the size of the flange, and to ensure the tightness of the flange on the fixture by using the airtight hole.

[0004] A gas-tight fixture structure for a flange drilling machine comprises a fixture base and a plurality of chuck jaws, wherein the plurality of chuck jaws are evenly distributed around the axis of the fixture base and radially slidably connected to the fixture base, and each chuck jaw is provided with a flange supporting surface, and an airtight hole is opened on the flange supporting surface, and the airtight hole is connected to the central air channel in the fixture base through the jaw air channel.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, an exhaust hole connected to the pressure jaw air channel is opened on the side of the chuck pressure jaw, and the exhaust hole is connected to a first air source interface, and the first air source interface is connected to the central air channel.

[0007] As a further solution, a longitudinal linear groove and a transverse linear groove are provided in the chuck pressure claw, the upper end of the longitudinal linear groove constitutes an airtight hole, the lower end is connected with the closed end of the transverse linear groove, the open end of the transverse linear groove constitutes a slotted hole, a blockage is provided on the slotted hole, the exhaust hole is connected with the transverse linear groove, and a pressure claw airway is formed between the longitudinal linear groove and at least one section of the transverse linear groove.

[0008] As a further solution, a central through hole is opened in the clamp base, and a spacer sleeve is assembled and connected in the central through hole. A boss extends from the center of the spacer sleeve, and the side wall of the boss is opened with through-tube holes corresponding to the number of chuck pressure claws. The exhaust pipe connected to the first air source interface passes through the through-tube holes and extends into the central through hole.

[0009] As a further solution, a transition component is also assembled and connected in the central through hole, the central airway is opened in the transition component, the air outlet end of the central airway is connected to the negative pressure source, the air inlet end of the central airway is connected to a second air source interface corresponding to a number of corresponding pipe holes, and the second air source interface is connected to the first air source interface through an exhaust pipe.

[0010] As a further solution, the transition assembly includes a transition stud and an air circuit plate, wherein the air circuit plate is fastened to the head of the transition stud; the stud portion of the transition stud is provided with a central main air duct and a plurality of radially arranged branch air ducts that are interconnected, and the air circuit plate is provided with connecting holes corresponding to each branch air duct, and the connecting holes, branch air ducts and the central main air duct constitute the central air duct, and the plurality of second air source interfaces are connected to the air circuit plate.

[0011] As a further solution, the chuck pressure jaw is provided with two or more step-difference end faces, the outer step-difference end face forms a flange support face, the inner step-difference end face forms an avoidance end face, and the outer end of the flange support face is provided with a limiting protrusion, and a flange clamping cavity is formed between the multiple limiting protrusions.

[0012] As a further solution, a guide groove is radially opened on the clamp base, which is connected to the central through hole. A base jaw is slidably connected in the guide groove and is limited by the spacer sleeve. The chuck pressure jaw is adjustably connected to the top surface of the base jaw.

[0013] As a further solution, an adjustment groove is provided on the base jaw along its sliding direction, an adjustment nut is slidably connected in the adjustment groove, the adjustment nut is tightly connected to the chuck pressure jaw, and the base jaw and the chuck pressure jaw have mutually meshing fine-tuning tooth surfaces on their opposing abutting surfaces.

[0014] As a further solution, it also includes a CNC dividing plate, and the clamp base is horizontally connected to the rotation output end of the CNC dividing plate; a pull rod is provided in the CNC dividing plate, one end of the pull rod is connected to the transition stud, and the other end of the pull rod extends out of the CNC dividing plate and is connected to a retraction cylinder.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model discloses an airtight fixture structure for a flange drilling machine. The airtight hole is arranged on the contact surface between the chuck pressure jaw and the flange, so that the airtight hole moves synchronously with the chuck pressure jaw to adapt to the size of the flange. There is no need to replace the fixture cumbersomely. The utility model is convenient and fast, has strong versatility, can improve production efficiency, and can reduce production costs. After the flange is placed in the fixture through the mechanical structure, the airtight hole is used to ensure the tightness of the flange on the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an embodiment of a clamp in the utility model.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the chuck pressure claw in the utility model.

[0019] Figure 3 This is a schematic diagram of the decomposed structure of the clamp in the utility model.

[0020] Figure 4 It is a schematic diagram of the cross-section decomposition of the clamp in the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1 to 4 As shown, an airtight fixture structure of a flange drilling machine includes a fixture base 1 and a plurality of chuck jaws 2, wherein the plurality of chuck jaws 2 are evenly distributed around the axis of the fixture base 1 and radially slidably connected to the fixture base 1, and each chuck jaw 2 is provided with a flange supporting surface 201, and an airtight hole 202 is opened on the flange supporting surface 201, and the airtight hole 202 is connected with a central air channel 22 in the fixture base 1 through a jaw air channel 21.

[0023] This clamp sets the airtight hole on the contact surface between the chuck jaw 2 and the flange, so that the airtight hole 202 moves synchronously with the chuck jaw 2 to adapt to the size of the flange. There is no need to replace the clamp cumbersomely. It is convenient and fast, has strong versatility, can improve production efficiency, and can reduce production costs. After the flange is placed in the clamp through the mechanical structure, the airtight hole is used to ensure the tightness of the flange on the clamp.

[0024] An exhaust hole 23 communicating with the pressure jaw air channel 21 is formed on the side of the chuck pressure jaw 2 . The exhaust hole 23 is connected to the first air source interface 3 . The first air source interface 3 is communicated with the central air channel 22 .

[0025] A longitudinal linear groove 203 and a transverse linear groove 204 are provided in the chuck pressure jaw 2. The upper end of the longitudinal linear groove 203 constitutes an airtight hole 202, and the lower end is connected to the closed end of the transverse linear groove 204. The open end of the transverse linear groove 204 constitutes a slotted hole 205. A plug is provided on the slotted hole 205. The exhaust hole 23 is connected to the transverse linear groove 204. A pressure jaw airway 21 is formed between the longitudinal linear groove 203 and at least one section of the transverse linear groove 204.

[0026] The transverse linear through slot 204 is arranged along the length direction of the chuck jaw 2. A longitudinal linear through slot 203 can be opened to communicate with the transverse linear through slot 204 according to the clamping position of the flange, so that the chuck jaw 2 can adapt to flanges of various widths.

[0027] A central through hole 101 is provided in the clamp base 1, and a spacer sleeve 4 is assembled and connected in the central through hole 101. A boss 401 extends from the center of the spacer sleeve 4, and a side wall of the boss 401 is provided with through holes 402 corresponding to the number of the chuck jaws 2. The exhaust pipe connected to the first air source interface 3 passes through the through holes 402 and extends into the central through hole 101; so that the exhaust pipe can pass through the through holes 402 and be introduced into the clamp base 1. When the clamp base 1 drives the chuck jaw 2 to rotate, the correspondingly connected exhaust pipe can rotate synchronously, and problems such as exhaust pipe entanglement will not occur.

[0028] The central through hole 101 is also equipped with a transition component, and the central air duct 22 is opened in the transition component. The air outlet end of the central air duct 22 is connected to the negative pressure source, and the air inlet end of the central air duct 22 is connected to a second air source interface 5 corresponding to a number of corresponding through-tube holes 402. The second air source interface 5 is connected to the first air source interface 3 through an exhaust pipe. The transition component is used to allow the central air duct to be led out along the center of the clamp base 1.

[0029] The transition assembly includes a transition stud 6 and an air circuit plate 7, and the air circuit plate 7 is fastened to the head of the transition stud 6; the stud part of the transition stud 6 is provided with a central main air channel 601 and a plurality of radially arranged branch air channels 602 that are interconnected, and the air circuit plate 7 is provided with a connecting hole 701 corresponding to each branch air channel 602, and the connecting hole 701, the branch air channel 602 and the central main air channel 601 constitute a central air channel 22, and the plurality of second air source interfaces 5 are connected to the air circuit plate 7.

[0030] The chuck pressure jaw 2 is provided with two or more step-difference end faces, the outer step-difference end face forms a flange support face 201, the inner step-difference end face forms an avoidance end face 206, and the outer end of the flange support face 201 is provided with a limiting protrusion 207, and a flange clamping cavity is formed between the multiple limiting protrusions 207.

[0031] A guide groove 102 is radially opened on the clamp base 1, and the guide groove 102 is connected to the central through hole 101. The base jaws 8 are slidably connected in the guide groove 102 and are limited by the spacer sleeve 4. The chuck pressure jaws 2 are adjustably connected to the top surface of the base jaws 8; the guide groove 102 guides each base jaw 8 to perform linear motion along the radial direction.

[0032] An adjustment groove 801 is provided on the base jaw 8 along its sliding direction, and an adjustment nut 9 is slidably connected in the adjustment groove 801. The adjustment nut 9 is tightly connected to the chuck pressure jaw 2, and the base jaw 8 and the chuck pressure jaw 2 are both provided with mutually meshing fine-tuning tooth surfaces 10 on the opposing abutting surfaces; the fine-tuning tooth surfaces 10 can adjust the initial position of the chuck pressure jaw 2 according to the diameter of the flange, and can reduce the loose and tight sliding stroke of the base jaw 8 and the chuck pressure jaw 2.

[0033] It also includes a CNC dividing plate 11, and the clamp base 1 is horizontally connected to the rotation output end of the CNC dividing plate 11; a pull rod 12 is provided in the CNC dividing plate 11, one end of the pull rod 12 is connected to the transition stud 6, and the other end of the pull rod 12 extends out of the CNC dividing plate 11 and is connected to a retracting cylinder 13; the clamp is connected to the CNC dividing plate 11, and can drive the flange to rotate in steps, so as to facilitate the circumferential processing of the flange by the spindle; since the clamp base 1 is horizontally arranged, when the manipulator places the flange on the clamp base 1, after the chuck pressure claw 2 clamps the flange, it is easy for the flange to not be pressed tightly on one of the flange support surfaces 201, so the airtight hole 202 opened on the flange support surface 201 has a more significant effect on the horizontally placed clamp.

[0034] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An airtight fixture structure for a flange drilling machine, characterized in that: The invention comprises a clamp base (1) and a plurality of chuck pressing jaws (2), wherein the plurality of chuck pressing jaws (2) are evenly distributed around the axis of the clamp base (1) and are radially slidably connected to the clamp base (1), and each chuck pressing jaw (2) is provided with a flange supporting surface (201), and an airtight hole (202) is opened on the flange supporting surface (201), and the airtight hole (202) is connected to a central air channel (22) in the clamp base (1) through a pressing jaw air channel (21).

2. The airtight fixture structure of a flange drilling machine according to claim 1, characterized in that: An exhaust hole (23) communicating with the pressure jaw airway (21) is provided on the side of the chuck pressure jaw (2); the exhaust hole (23) is connected to a first air source interface (3); and the first air source interface (3) is connected to the central airway (22).

3. The airtight fixture structure of a flange drilling machine according to claim 2, characterized in that: The chuck pressure jaw (2) is provided with a longitudinal linear groove (203) and a transverse linear groove (204); the upper end of the longitudinal linear groove (203) forms an airtight hole (202); the lower end is connected to the closed end of the transverse linear groove (204); the open end of the transverse linear groove (204) forms a slotted hole (205); a plug is provided on the slotted hole (205); the exhaust hole (23) is connected to the transverse linear groove (204); and a pressure jaw airway (21) is formed between the longitudinal linear groove (203) and at least one section of the transverse linear groove (204).

4. The airtight fixture structure of a flange drilling machine according to claim 2, characterized in that: The clamp base (1) is provided with a central through hole (101), a spacer sleeve (4) is mounted and connected in the central through hole (101), a boss (401) extends from the center of the spacer sleeve (4), a side wall of the boss (401) is provided with through-tube holes (402) corresponding to the number of the chuck pressure claws (2), and an exhaust pipe connected to the first air source interface (3) passes through the through-tube holes (402) and extends into the central through hole (101).

5. The airtight fixture structure of a flange drilling machine according to claim 4, characterized in that: A transition component is also assembled and connected in the central through hole (101), the central air channel (22) is opened in the transition component, the air outlet end of the central air channel (22) is connected to the negative pressure source, and the air inlet end of the central air channel (22) is connected to a second air source interface (5) corresponding to a number of corresponding through-tube holes (402), and the second air source interface (5) is connected to the first air source interface (3) through an exhaust pipe.

6. The airtight fixture structure of a flange drilling machine according to claim 5, characterized in that: The transition assembly comprises a transition stud (6) and an air circuit plate (7), wherein the air circuit plate (7) is fastened to the head of the transition stud (6); the stud portion of the transition stud (6) is provided with a central main air channel (601) and a plurality of radially arranged branch air channels (602) which are interconnected, the air circuit plate (7) is provided with a connecting hole (701) corresponding to each branch air channel (602), the connecting hole (701), the branch air channels (602) and the central main air channel (601) constitute a central air channel (22), and the plurality of second air source interfaces (5) are connected to the air circuit plate (7).

7. The airtight fixture structure of a flange drilling machine according to claim 1, characterized in that: The chuck pressure jaw (2) is provided with two or more step-difference end faces, the outer step-difference end face forms a flange support face (201), the inner step-difference end face forms an avoidance end face (206), and the outer end of the flange support face (201) is provided with a limiting convex portion (207), and a flange clamping cavity is formed between the plurality of limiting convex portions (207).

8. The airtight fixture structure of a flange drilling machine according to claim 4, characterized in that: A guide slot (102) is radially provided on the clamp base (1), the guide slot (102) is connected to the central through hole (101), a base jaw (8) is slidably connected in the guide slot (102) and is limitedly abutted against the spacer sleeve (4), and the chuck pressure jaw (2) is adjustably connected to the top surface of the base jaw (8).

9. The airtight fixture structure of a flange drilling machine according to claim 8, characterized in that: An adjustment groove (801) is provided on the base jaw (8) along its sliding direction, an adjustment nut (9) is slidably connected in the adjustment groove (801), the adjustment nut (9) is tightly connected to the chuck pressure jaw (2), and mutually meshing fine-tuning tooth surfaces (10) are provided on the opposing abutting surfaces of the base jaw (8) and the chuck pressure jaw (2).

10. The airtight fixture structure of a flange drilling machine according to claim 6, characterized in that: It also includes a numerically controlled indexing disk (11), wherein the fixture base (1) is horizontally connected to the rotation output end of the numerically controlled indexing disk (11); a pull rod (12) is provided inside the numerically controlled indexing disk (11), one end of the pull rod (12) is connected to the transition stud (6), and the other end of the pull rod (12) extends out of the numerically controlled indexing disk (11) and is connected to a retracting cylinder (13).

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