Synchronous drilling clamp for multi-hole machining

Abstract

The utility model relates to the technical field of casting part machining, in particular to a multi-hole machining synchronous drilling clamp which comprises a tool table, two fixing bases are arranged at the upper end of the tool table, a positioning plate is arranged between the two fixing bases, and a first power clamp device is arranged on one side of the positioning plate and used for fixing a casting placed between the two fixing bases. The ejector rods are arranged on the sides, close to each other, of the two fixing seats, second chucks are arranged at the ends, away from the fixing seats, of the ejector rods, and the second power clamps are arranged in the fixing seats and used for pushing the ejector rods to stretch out and draw back synchronously. The two sets of ejector rods conduct multi-point fixing on the casting from the other two sides of the casting, the multiple fixing points can evenly share the clamping force, the possibility that a single fixing point is loosened or damaged or fails due to too large stress is reduced, and therefore the reliability of the whole clamping device is improved; and in addition, the object can be effectively prevented from shaking, shifting or overturning in the clamping process, and the clamping stability is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of casting processing technology, and in particular to a synchronous drilling fixture for multi-hole processing. Background Technology

[0002] In rail transit braking devices, castings are fixed using positioning fixtures when holes are drilled. The positioning fixtures accurately position and fix the castings, effectively preventing them from shifting and ensuring the positional accuracy and quality stability of the castings during the hole drilling process.

[0003] Patent application CN202420532060.7 discloses an eccentric wheel scribing and drilling fixture. This fixture includes a base, a pressure plate, clamping screws, and a workpiece. The base is an "I"-shaped plate with a V-shaped groove along its transverse axis at the head for clamping the workpiece. Multiple evenly distributed vertical guide pin holes are located on the side platforms on both sides of the V-shaped groove. The pressure plate is a hollow rectangular plate with a central annular rectangular hole. This fixture can simultaneously restrict both axial movement and central rotation, enabling rapid fixation of the workpiece with high positioning accuracy. It allows for scribing at the positions of the eccentric and radial holes, and direct drilling of the radial holes. The fixture has a simple structure and is easy to operate. However, because the guide plate clamps the casting in a bidirectional manner, stress concentrates in one area during clamping. Excessive clamping force can easily damage the surface of the casting. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a multi-hole machining synchronous drilling fixture to overcome the shortcomings of existing fixtures.

[0005] To achieve the purpose of this utility model, the utility model is achieved through the following technical solution: a multi-hole machining synchronous drilling fixture, comprising: a tooling table, with two fixed seats provided at the upper end of the tooling table, and the fixed seats being fixedly connected to the tooling table;

[0006] A positioning plate is placed between two fixed seats, and the left and right ends of the positioning plate are fixedly connected to the fixed seats;

[0007] The first power clamp, located on one side of the positioning plate, is used to fix the casting placed between the two fixed seats;

[0008] Multiple push rods are placed on one side of two fixed seats that are close to each other. The end of the push rod away from the fixed seat is provided with a second clamp, and the other end of the push rod is inserted into the fixed seat and slidably connected to the fixed seat.

[0009] The second power clamp, placed inside the fixed seat, is used to push multiple push rods to extend and retract synchronously, thereby fixing the casting placed between the two fixed seats.

[0010] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0011] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0012] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0013] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0014] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0015] Further improvement lies in that the first power clamping comprises a first pneumatic push rod, the first pneumatic push rod is detachably connected to the upper end of the tooling table, the first pneumatic push rod is provided with a first chuck on the side facing the positioning plate, and the output end of the first pneumatic push rod is fixedly connected with the first chuck.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] Two groups of top rods fix the casting from the other two sides, multiple fixing points can evenly share the clamping force, the possibility that a single fixing point is loose, damaged or fails due to excessive stress is reduced, the reliability of the whole clamping device is improved, and the object can be more effectively prevented from shaking, deviating or overturning in the clamping process, and the stability of clamping is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 is the structure diagram of the tooling table in the utility model.

[0020] Figure 2 is the structure diagram of the fixing base in the utility model.

[0021] Figure 3 is the structure diagram of the ejector rod in the utility model.

[0022] 1, tooling table; 2, fixing base; 3, positioning plate; 4, first pneumatic push rod; 5, bolt base; 6, first chuck; 7, sleeve; 8, guide edge; 9, ejector rod; 10, guide groove; 11, second chuck; 12, first placing cavity; 13, second placing cavity; 14, second pneumatic push rod; 15, pull rod; 16, L-shaped push piece; 17, polygonal edge groove; 18, polygonal prism. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort are within the scope of protection of the present application.

[0024] According to Figure 1 , 2 , 3, a multi-hole machining synchronous drilling clamp is provided in the embodiments, which comprises: a tooling table 1, two fixing bases 2 are arranged on the upper end of the tooling table 1, and the fixing bases 2 are fixedly connected with the tooling table 1;

[0025] A positioning plate 3 is arranged between the two fixing bases 2, and the left and right ends of the positioning plate 3 are fixedly connected with the fixing bases 2; a casting needing to be drilled is placed between the two fixing bases 2, and the positioning plate 3 is abutted against one side of the casting.

[0026] A first power clamp is arranged on one side of the positioning plate 3 and is used for fixing the casting placed between the two fixing bases 2; the first power clamp pushes the casting from the other side of the casting and cooperates with the positioning plate 3 to fix the casting.

[0027] A plurality of top rods 9 are arranged on one side of the two fixed seats 2 close to each other, and the end of the top rod 9 away from the fixed seat 2 is provided with a second chuck 11, and the other end of the top rod 9 is inserted into the fixed seat 2 and is in sliding connection with the fixed seat 2;

[0028] The second power clamp is arranged in the fixed seat 2 and is used for pushing the plurality of top rods 9 to synchronously extend and retract, so as to fix the casting placed between the two fixed seats 2.

[0029] In order to prevent the casting from being deviated when the hole is opened, the second power clamp in the fixed seat 2 controls the top rods 9 on the fixed seat 2 to extend and retract synchronously, and the two groups of top rods 9 fix the casting from the other two sides of the casting by multiple points, so that the plurality of fixing points can evenly share the clamping force, the possibility of loosening, damage or failure of a single fixing point due to excessive force is reduced, the reliability of the entire clamping device is improved, and in addition, the object can be more effectively prevented from shaking, deviating or overturning during clamping, and the stability of clamping is greatly improved.

[0030] Regarding the first power clamp:

[0031] The first power clamp includes a first pneumatic push rod 4, which is detachably connected to the upper end of the tool table 1, and the first pneumatic push rod 4 is provided with a first chuck 6 on the side facing the positioning plate 3, and the output end of the first pneumatic push rod 4 is fixedly connected with the first chuck 6. The casting needing to be drilled is placed between the two fixed seats 2, and the first pneumatic push rod 4 will push the casting through the first chuck 6, and cooperate with the positioning plate 3 to fix the casting from the left and right sides of the casting.

[0032] It is worth noting that the first placing cavity 12 and the second placing cavity 13 for placing the second power clamp are arranged in the fixed seat 2, the end of the top rod 9 away from the second chuck 11 extends into the second placing cavity 13, the outer side of the top rod 9 is provided with a sleeve 7, the sleeve 7 is fixedly connected with the fixed seat 2, and the sleeve 7 is in sliding connection with the top rod 9. The second power clamp is placed in the first placing cavity 12 and the second placing cavity 13, and is used for pushing the plurality of top rods 9 on the fixed seat 2 to synchronously extend and retract, and the top rod 9 slides along the inner wall of the sleeve 7 when extending and retracting, and the sleeve 7 guides the top rod 9 by cooperating with the top rod 9, so as to improve the stability of the top rod 9 when extending and retracting.

[0033] Regarding the second power clamp:

[0034] The second power clamp comprises a second pneumatic push rod 14 and a pull rod 15. The second pneumatic push rod 14 is fixedly connected inside the first placing cavity 12, and the pull rod 15 is arranged in the second placing cavity 13. One end of the pull rod 15 penetrates into the first placing cavity 12 and is fixedly connected with the output end of the second pneumatic push rod 14. The outer side of the pull rod 15 is provided with a plurality of L-shaped push plates 16. One end of each L-shaped push plate 16 is hingedly connected with the pull rod 15, and the other end of each L-shaped push plate 16 is hingedly connected with the jacking rod 9. The central part of each L-shaped push plate 16 is provided with a pivot, and each L-shaped push plate 16 is pivotally connected to the bottom wall of the second placing cavity 13 through the pivot.

[0035] When the second pneumatic push rod 14 horizontally pushes the pull rod 15, the pull rod 15 will synchronously push the two L-shaped push plates 16, and the L-shaped push plates 16 will rotate around the pivots. When rotating, the end of each L-shaped push plate 16 away from the pull rod 15 will push the jacking rod 9, so as to push the jacking rod 9 out of the second placing cavity 13 and to the outside of the fixed seat 2. Conversely, the jacking rod 9 will be pulled into the second placing cavity 13.

[0036] In order to further improve the stability of the pull rod 15 when translating in the second placing cavity 13, in the preferred scheme, the end of the pull rod 15 away from the second pneumatic push rod 14 is provided with a polygonal prism 18. The polygonal prism 18 is fixedly connected with the pull rod 15. The end of the polygonal prism 18 away from the pull rod 15 penetrates out of the fixed seat 2. The outer side of the fixed seat 2 is provided with a polygonal prism groove 17 matched with the polygonal prism 18. When the pull rod 15 is pushed by the second pneumatic push rod 14, the polygonal prism 18 fixedly connected with the pull rod 15 will also move. The polygonal prism 18 moves along the polygonal prism groove 17. The polygonal prism groove 17 limits the rotation of the pull rod 15 by matching with the polygonal prism 18.

[0037] In order to avoid the deflection of the jacking rod 9 when supporting, in the preferred scheme, the outer side of the jacking rod 9 is provided with a guide groove 10, and the inner side of the sleeve 7 is provided with a guide rib 8. The guide rib 8 is fixedly connected with the sleeve 7. The guide rib 8 is inserted into the guide groove 10 and is in sliding connection with the guide groove 10. The jacking rod 9 slides along the inner side wall of the sleeve 7. The guide rib 8 fixedly connected with the inner side of the sleeve 7 will slide along the guide groove 10 provided on the outer side of the jacking rod 9. The guide rib 8 limits the jacking rod 9 by matching with the guide groove 10, so that the jacking rod 9 will not rotate when sliding.

[0038] In order to facilitate the disassembly and assembly of the first pneumatic push rod 4, in the preferred scheme, the left and right sides of the first pneumatic push rod 4 are provided with a bolt seat 5. The bolt seat 5 is fixedly connected with the first pneumatic push rod 4. The bolt seat 5 is provided with a fixed bolt. The fixed bolt penetrates through the bolt seat 5 and is in threaded connection with a bolt hole provided on the upper end of the tooling table 1. When replacing the first pneumatic push rod 4, the fixed bolt on the bolt seat 5 can be rotated out of the bolt hole on the upper end of the tooling table 1.

[0039] The working principle of the present application is as follows:

[0040] The casting needing to be opened is placed between the two fixing bases 2, and the positioning plate 3 is abutted against one side of the casting. The first power clamp pushes the casting from the other side of the casting, and cooperates with the positioning plate 3 to fix the casting. In order to prevent the casting from being deviated during opening, the second power clamp in the fixing base 2 synchronously controls the extension and retraction of the top rods 9 on the fixing base 2, and the two groups of top rods 9 fix the casting from the other two sides of the casting. Multiple fixing points can evenly share the clamping force, which reduces the possibility of loosening, damage or failure of a single fixing point due to excessive force, thereby improving the reliability of the entire clamping device. In addition, it can more effectively prevent the object from shaking, deviating or overturning during clamping, greatly improving the stability of clamping.

[0041] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A multi-hole machining synchronous drilling jig, characterized by, Include: Tooling table (1), the upper end of the tooling table (1) is provided with two fixed seats (2), the fixed seat (2) is fixedly connected with the tooling table (1); Positioning plate (3), placed between two fixed seats (2), the left and right ends of the positioning plate (3) are fixedly connected with the fixed seat (2); The first power clamp is placed on one side of the positioning plate (3) and is used for fixing the casting placed between the two fixed seats (2); A plurality of ejector rods (9) are placed on one side of the two fixed seats (2) close to each other, one end of the ejector rod (9) away from the fixed seat (2) is provided with a second chuck (11), the other end of the ejector rod (9) is inserted into the fixed seat (2) and is slidably connected with the fixed seat (2); The second power clamp is placed in the fixed seat (2) and is used for pushing the plurality of ejector rods (9) to expand and contract synchronously to fix the casting placed between the two fixed seats (2).

2. The multi-hole machining synchronized drilling jig according to claim 1, characterized in that: The first power clamp includes a first pneumatic push rod (4), the first pneumatic push rod (4) is detachably connected on the upper end of the tooling table (1), the first pneumatic push rod (4) is provided with a first chuck (6) on the side facing the positioning plate (3), and the output end of the first pneumatic push rod (4) is fixedly connected with the first chuck (6).

3. The multi-hole machining synchronized drilling jig according to claim 1, characterized in that: The fixed seat (2) is provided with a first placing cavity (12) and a second placing cavity (13) for placing the second power clamp, one end of the ejector rod (9) away from the second chuck (11) extends into the second placing cavity (13), a sleeve (7) is arranged on the outer side of the ejector rod (9), the sleeve (7) is fixedly connected with the fixed seat (2), and the sleeve (7) is slidably connected with the ejector rod (9).

4. The multi-hole machining synchronized drilling jig according to claim 3, characterized in that: The second power clamp includes a second pneumatic push rod (14) and a pull rod (15), the second pneumatic push rod (14) is fixedly connected on the inner side of the first placing cavity (12), the pull rod (15) is placed in the second placing cavity (13), one end of the pull rod (15) penetrates into the first placing cavity (12) and is fixedly connected with the output end of the second pneumatic push rod (14), a plurality of L-shaped tabs (16) are arranged on the outer side of the pull rod (15), one end of the L-shaped tab (16) is hinged with the pull rod (15), the other end of the L-shaped tab (16) is hinged with the ejector rod (9), a pivot is arranged in the center of the L-shaped tab (16), and the L-shaped tab (16) is pivotally connected to the bottom wall of the second placing cavity (13).

5. A multi-hole machining synchronized drilling jig according to claim 4, characterized in that: One end of the pull rod (15) away from the second pneumatic push rod (14) is provided with a polygonal prism (18), the polygonal prism (18) is fixedly connected with the pull rod (15), one end of the polygonal prism (18) away from the pull rod (15) penetrates out of the fixed seat (2), and a polygonal prism groove (17) matched with the polygonal prism (18) is formed on the outer side of the fixed seat (2).

6. The multi-hole machining synchronized drilling jig according to claim 3, characterized in that: The outer side of the top rod (9) is provided with a guide groove (10), the inner side of the sleeve (7) is provided with a guide rib (8), the guide rib (8) is fixedly connected with the sleeve (7), and the guide rib (8) is inserted into the guide groove (10) and is in sliding connection with the guide groove (10).

7. The multi-hole machining synchronized drilling jig according to claim 2, characterized in that: The left and right sides of the first pneumatic push rod (4) are provided with a bolt seat (5), the bolt seat (5) is fixedly connected with the first pneumatic push rod (4), a fixed bolt is assembled on the bolt seat (5), the fixed bolt passes through the bolt seat (5) and is in threaded connection with a bolt hole provided on the upper end of the tooling table (1).

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