Pneumatic arc plate milling machine fixture

Abstract

The utility model discloses a pneumatic type arc plate milling machine fixture, belongs to the technical field of fixtures, solves the problem that a fixture in the prior art cannot accurately clamp an arc plate, and comprises a clamping mechanism, the clamping mechanism is composed of a fixed seat, a bearing table and a pneumatic clamping piece, and the arc plate is placed on the bearing table. A centering positioning mechanism is arranged at one end of the bearing table and comprises a positioning block and an eccentric stop block, the eccentric stop block is connected with the positioning block through a torsional spring, and positioning pin holes are formed in the positions, located on the peripheral side of the arc plate, of the bearing table. After the arc plate is placed on the bearing table, the arc plate moves on the surface of the bearing table to drive the eccentric check block to rotate, then the torsional spring accumulates force, the pin shaft is inserted into the positioning pin hole to achieve primary fixing of the arc plate, then the arc plate is clamped and fixed through the pneumatic clamping piece, accurate position control over the arc plate is achieved, and the stability of the arc plate is guaranteed; the clamp is installed on a milling machine through a bottom plate, the clamp is enclosed by a water collecting tank plate, and a liquid discharging tank is arranged in the water collecting tank plate to discharge liquid.

Description

Technical Field

[0001] The utility model belongs to the technical field of jigs, and specifically relates to a pneumatic arc plate milling machine jig. Background Art

[0002] The existing arc plate milling machine jigs usually use pressing blocks to fix the arc plate on both long sides and in the middle in two times. The assembly process entirely depends on manual operation by workers, which is time-consuming and laborious, and extremely affects the processing progress. At the same time, manual operation easily leads to unbalanced pressure on both sides of the pressing block, resulting in damage to the accuracy of the arc plate sample during processing or even scrapping of the sample, increasing the production cost of the sample. Secondly, the traditional pressing block jig requires manual positioning by workers, and it is very difficult to take into account the assembly of the jig while positioning, so that at least two people are required to participate in the clamping process, increasing the labor cost.

[0003] In order to solve the above problems, there are numerous studies on arc plate jigs in the prior art. For example, the Chinese utility model patent CN212095422U discloses a pneumatic jig for machining parts with irregular positioning surfaces. The jig includes a bottom plate and a fixed seat. The fixed seat is fixed on the bottom plate. A first rotary cylinder and a second rotary cylinder are arranged on the bottom plate. An arc-shaped groove is arranged on the fixed seat. The movable ends of the first rotary cylinder and the second rotary cylinder are respectively matched with both ends of the arc-shaped groove. A limiting component is arranged at the side end of the fixed seat. The limiting component includes a limiting block and a pressing column. The limiting block is fixedly connected with the fixed seat, and the pressing column is fixedly connected with the limiting block in the horizontal direction. A stepped block is arranged at the movable end of the first rotary cylinder, and a first buffer pad is arranged at the lower end of the stepped block. When the jig is used, the part is first placed on the arc-shaped groove and limited by the limiting block and the pressing column, and then the first rotary cylinder and the second rotary cylinder work to drive the stepped block to move to clamp and fix the part. However, the jig still has the following defects during use.

[0004] During the process of clamping the part by the above jig, since the part cannot be fixed when being limited by the limiting block and the pressing column, the stability of the part is poor. After the part deviates in the arc-shaped groove, the first rotary cylinder and the second rotary cylinder work to drive the stepped block to move and cannot accurately clamp the part, resulting in low clamping efficiency and poor effect. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the problem that the fixture in the prior art cannot accurately clamp, the following technical solutions are adopted in the present utility model.

[0007] A pneumatic arc plate milling machine fixture, comprising a clamping mechanism. The clamping mechanism includes a fixed seat, a bearing platform, and pneumatic clamping members located on the periphery of the bearing platform. The arc plate is placed on the bearing platform, and the pneumatic clamping members are used to clamp the arc plate. Positioning pin holes are provided on the bearing platform on the periphery of the arc plate, and a centering positioning mechanism is provided at one end of the bearing platform on the fixed seat. When the arc plate moves on the bearing platform and cooperates with the centering positioning mechanism to expose the positioning pin holes on the periphery, a pin is inserted to preliminarily fix the arc plate on the bearing platform, and then the pin is removed after the pneumatic clamping members clamp the arc plate.

[0008] Preferably, the centering positioning mechanism includes a fixed shaft, a positioning block, and an eccentric stopper. The fixed shaft is fixedly installed on the fixed seat, the positioning block is installed on the fixed shaft, the positioning block fits against the end of the bearing platform to achieve the positioning purpose, and the eccentric stopper is rotatably installed on the positioning block. A torsion spring is installed between the eccentric stopper and the positioning block. When the arc plate moves on the bearing platform, it can drive the eccentric stopper to rotate and the torsion spring to store energy.

[0009] Preferably, a stop post is installed on the lower surface of the eccentric stopper, and the stop post cooperates with the eccentric stopper to prevent the arc plate from disengaging from the eccentric stopper.

[0010] Preferably, the pneumatic clamping member includes a rotary pressing cylinder and a clamping assembly. When the rotary pressing cylinder works, it can drive the clamping assembly to move up and down. After the clamping assembly moves down and presses against the arc plate, the arc plate can be clamped and fixed.

[0011] Preferably, the clamping assembly includes a connecting portion and a pressing portion. The connecting portion is connected to the working end of the rotary pressing cylinder, and the pressing portion is connected to the connecting portion. When the rotary pressing cylinder works, it drives the connecting portion and the pressing portion to move. When the pressing portion presses against the side of the arc plate, the arc plate can be clamped and fixed.

[0012] Preferably, a clamping groove is formed on the lower surface of the pressing portion. When the pressing portion presses against the arc plate, the clamping groove is clamped at the side of the arc plate, and the arc plate is clamped and fixed by the pressing portion pressing against the arc plate.

[0013] Preferably, the fixture is fixedly installed on the bottom plate through the fixed seat, and is installed on the milling machine through the bottom plate. A water collecting trough plate is fixedly installed on the surface of the bottom plate, and the water collecting trough plate encloses the fixture.

[0014] Preferably, a liquid discharge groove is formed on the bottom plate inside the water collecting trough plate, and the liquid discharge groove is used to discharge the liquid in the water collecting trough plate.

[0015] Preferably, a plurality of the pneumatic clamping members are provided, and the rotary pressing cylinders in the pneumatic clamping members are controlled to work through the same pipeline. The rotary pressing cylinders work by injecting and discharging gas, and can drive the clamping assembly to move up and down.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) In the pneumatic arc plate milling fixture of the present utility model, the arc plate is clamped by the pneumatic clamping member, and a clamping groove is provided on the pressing portion in the pneumatic clamping member. The clamping groove is clamped on the side of the arc plate, ensuring the stability of the fixture clamping the arc plate. In addition, before clamping the arc plate, the arc plate is centered and adjusted by the centering and positioning mechanism. Specifically, the fixture moves to drive the eccentric block on the centering and adjusting mechanism to rotate, so that the torsion spring stores energy. After the positioning pin holes on the periphery of the arc plate are exposed, the pin shaft is inserted into the positioning pin holes to preliminarily fix the arc plate, and then the arc plate is pressed and clamped by the pneumatic clamping member, ensuring the accuracy of the arc plate position and improving the clamping effect.

[0018] (2) In the pneumatic clamping member of the present utility model, the rotary pressing cylinders inject and discharge gas through the same pipeline, so that multiple rotary pressing cylinders can move synchronously and apply the same magnitude of force to the arc plate, avoiding the problem of arc plate damage caused by excessive local force application.

[0019] (3) The fixture of the present utility model is assembled on the milling machine through the bottom plate, and a water collecting groove plate is also connected to the bottom plate. The water collecting groove plate encloses the fixture to form a cavity. A liquid discharge groove is provided on the bottom plate in the water collecting groove plate, and the liquid discharge groove can discharge the liquid in the cavity, avoiding the residue of liquid in the fixture. Description of the Drawings

[0020] Figure 1 is the effect diagram of the assembly of the fixture, the bottom plate and the water collecting groove plate in the present utility model;

[0021] Figure 2 is Figure 1 the structural schematic diagram of another perspective;

[0022] Figure 3 is the structural schematic diagram of the fixture in the present utility model;

[0023] Figure 4 is the assembly schematic diagram of the fixed seat and the bearing platform in the present utility model;

[0024] Figure 5 is Figure 4 the top view;

[0025] Figure 6 is Figure 4Side view;

[0026] Figure 7 Structural schematic diagram of the centering and positioning mechanism in the present utility model;

[0027] Figure 8 Is Figure 7 Side view;

[0028] Figure 9 Structural schematic diagram of the rotary pressing cylinder in the present utility model;

[0029] Figure 10 Is Figure 9 Side view.

[0030] The corresponding relationship between each attached drawing label and the component name in the figure is as follows:

[0031] 100, bottom plate; 200, clamping mechanism;

[0032] 101, water collecting tank plate; 201, fixed seat; 202, bearing platform; 203, pneumatic clamping member; 204, centering and positioning mechanism;

[0033] 100a, drain tank;

[0034] 202a, positioning pin hole; 203a, rotary pressing cylinder; 203b, clamping assembly;

[0035] 203b-1, connecting portion; 203b-2, pressing portion; 203b-3, clamping groove;

[0036] 204a, fixed shaft; 204b, positioning block; 204c, eccentric block; 204d, torsion spring;

[0037] 204c-1, retaining post. Detailed implementation manners

[0038] To make the above objects, features and advantages of the present utility model more obvious and understandable, the detailed implementation manners of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0039] Many specific details are set forth in the following description in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present utility model, so the present utility model is not limited by the specific embodiments disclosed below.

[0040] Secondly, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures or characteristics that may be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an embodiment that is separate or selectively mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0041] As Figure 1 and Figure 2 shown, the fixture in this embodiment is assembled on the bottom plate 100 and is assembled on the milling machine through the bottom plate. The fixture in this embodiment includes a clamping mechanism 200. The clamping mechanism 200 is installed on the bottom plate 100 and is installed on the milling machine through the bottom plate 100, and clamps the arc-shaped sample, that is, the arc plate, to ensure the stability of the sample.

[0042] As Figure 1 and Figure 2 shown, a water collecting trough plate 101 is formed around the outside of the clamping mechanism 200 in this embodiment. The water collecting trough plate 101 is fixedly installed on the bottom plate 100 by bolts. A liquid discharge groove 100a is also provided on the bottom plate 100 in this embodiment. The liquid discharge groove 100a can discharge the liquid in the cavity enclosed by the water collecting trough plate 101, avoiding liquid residue.

[0043] As Figures 3 - 6 shown, it is a schematic structural diagram of the clamping mechanism 200 in this embodiment. The clamping mechanism 200 in this embodiment includes a fixed seat 201. The fixed seat 201 is located in the cavity enclosed by the water collecting trough plate 101 and is fixedly installed on the surface of the bottom plate 100. A bearing platform 202 is fixedly installed on the surface of the fixed seat 201. The arc plate can be placed on the surface of the bearing platform 202. In this embodiment, a pneumatic clamping member 203 is fixedly installed on the fixed seat 201. When the pneumatic clamping member 203 works, it can clamp the arc plate on the surface of the bearing platform 202. It should be noted that there are 2 pneumatic clamping members 203 arranged along the long side direction of the arc plate and 1 pneumatic clamping member 203 arranged along the short side direction of the arc plate. The arc plate can be tightly fixed on the surface of the bearing platform 202 through the pneumatic clamping members 203 in the long side direction and the short side direction.

[0044] As Figure 9 and Figure 10 shown, the pneumatic clamping member 203 in this embodiment includes a rotary pressing cylinder 203a and a clamping assembly 203b. In this embodiment, the rotary pressing cylinder 203a is fixed on the surface of the fixed seat 201, and the power end of the rotary pressing cylinder 203a is connected to the clamping assembly 203b. When the rotary pressing cylinder 203a works, it can drive the clamping assembly 203b to rise or fall. When the clamping assembly 203b presses against the arc plate on the surface of the bearing platform 202, it is used to fix the arc plate to ensure the stability of the sample.

[0045] As Figure 10 shown, the clamping assembly 203b in this embodiment includes a connecting portion 203b-1. The connecting portion 203b-1 is installed at the power end of the rotary pressing cylinder 203a. An abutting portion 203b-2 is connected to the end of the connecting portion 203b-1. In this embodiment, when the rotary pressing cylinder 203a works, it drives the connecting portion 203b-1 and the abutting portion 203b-2 to move up and down. When the abutting portion 203b-2 abuts against the surface of the arc plate, the arc plate can be fixed on the surface of the carrier 202. As Figure 10 shown, in this embodiment, in order to further improve the stable effect of the pneumatic clamping member 203 on clamping the arc plate, in this embodiment, a clamping groove 203b-3 is formed on the lower surface of the abutting portion 203b-2. When the abutting portion 203b-2 moves downward due to the action of the rotary pressing cylinder 203a, the abutting portion 203b-2 abuts against the side of the arc plate, and the clamping groove 203b-3 is clamped on the side of the arc plate, further ensuring the stable effect of the pneumatic clamping member 203 on clamping the arc plate.

[0046] In addition, since in the prior art, when the position of the arc plate placed on the carrier is not accurate enough, the pneumatic clamping member 203 cannot ensure a good clamping effect on the arc plate. To solve this problem, arc-shaped placement grooves are distributed on the surface of the carrier 202 in this embodiment. Positioning pin holes 202a are provided on both sides of the arc-shaped placement grooves. There are multiple positioning pin holes 202a, and the placement area of the arc plate is located between the positioning pin holes 202a. In addition, a centering positioning mechanism 204 is provided at one end of the carrier 202. The centering positioning mechanism 204 is installed on the fixed seat 201 and is located at the end of the carrier 202, and positioning pin holes 202a are also provided on the surface of the carrier 202 opposite to one end of the centering positioning mechanism 204. In this embodiment, after the arc plate is placed on the carrier 202, the arc plate is accurately positioned on the carrier 202 after being adjusted by the centering positioning mechanism 204. The arc plate can be preliminarily fixed on the surface of the carrier 202 by inserting a pin into the positioning pin hole 202a. At this time, the pneumatic clamping member 203 works to drive the abutting portion 203b-2 to move downward to abut and fix the arc plate. After ensuring the stability of the arc plate, the arc plate can be accurately fixed on the surface of the carrier 202 by removing the pin.

[0047] As Figure 7 and Figure 8As shown, it is a schematic structural diagram of the centering and positioning mechanism 204 in this embodiment. The purpose of the centering and positioning mechanism 204 in this embodiment is to accurately position the arc plate on the surface of the carrier 202 so that the pneumatic clamping member 203 can perform accurate clamping. The centering and positioning mechanism 204 in this embodiment includes a fixed shaft 204a, the fixed shaft 204a is installed on the fixed seat 201, a positioning block 204b is installed on the fixed shaft 204a, and the positioning block 204b fits against the end of the carrier 202 to achieve the positioning purpose. And an eccentric stopper 204c is rotatably installed on the positioning block 204b, and a torsion spring 204d is installed between the positioning block 204b and the eccentric stopper 204c. In this embodiment, after the arc plate is placed on the carrier 202, in order to adjust the accuracy of the arc plate placement, the arc plate moves toward the side of the centering and positioning mechanism 204. After the end of the arc plate contacts the eccentric stopper 204c, the arc plate continues to move to drive the eccentric stopper 204c to rotate so that the torsion spring stores energy. Until all the positioning pin holes 202a on the circumferential side of the arc plate are exposed, at this time the arc plate is located at the center position of the carrier 202, and the centering adjustment is completed. After the pin shaft is inserted into the positioning pin hole 202a, the arc plate is initially fixed. Then the pneumatic clamping member 203 works to drive the pressing portion 203b-2 to press against the arc plate to ensure the stability of the arc plate. Then, after pulling out the pin shaft, the arc plate can be accurately clamped on the surface of the carrier 202 by the clamping force of the pneumatic clamping member 203.

[0048] In addition, as Figure 8 shown, a stop post 204c-1 is further provided on the lower surface of the eccentric stopper 204c in this embodiment. The stop post 204c-1 avoids the problem that the eccentric stopper 204c is separated from the end of the arc plate, and ensures that the arc plate can drive the eccentric stopper 204c to move during the centering adjustment process.

[0049] It should be noted that the rotary pressing cylinders 203a in the pneumatic clamping member 203 in this embodiment realize gas injection and discharge through the same pipeline, so as to realize the synchronous operation of multiple rotary pressing cylinders 203a and equal pressing forces, which not only ensures the clamping effect on the arc plate, but also avoids the problem of damage to the arc plate caused by excessive local clamping force.

[0050] The above content further elaborates on the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A pneumatic arc plate milling fixture, comprising a clamping mechanism (200), the clamping mechanism (200) includes a fixed seat (201), a bearing platform (202) and pneumatic clamping members (203) located on the periphery of the bearing platform (202). The arc plate is placed on the bearing platform (202), and the pneumatic clamping members (203) are used to clamp the arc plate. It is characterized in that, Positioning pin holes (202a) are provided on the circumferential side of the arc plate on the carrier table (202), and a centering and positioning mechanism (204) is provided at one end of the carrier table (202) on the fixed seat (201). When the arc plate moves on the carrier table (202) and cooperates with the centering and positioning mechanism (204) to expose the positioning pin holes (202a) on the circumferential side, a pin shaft is inserted to preliminarily fix the arc plate on the carrier table (202), and then the pneumatic clamping member (203) clamps the arc plate and removes the pin shaft.

2. The pneumatic arc plate milling machine fixture according to claim 1, wherein The described centering and positioning mechanism (204) includes a fixed shaft (204a), a positioning block (204b), and an eccentric stopper (204c). The fixed shaft (204a) is fixedly installed on the fixed seat (201), the positioning block (204b) is installed on the fixed shaft (204a), the positioning block (204b) fits against the end of the carrier table (202) to achieve the positioning purpose, and the eccentric stopper (204c) is rotatably installed on the positioning block (204b). A torsion spring (204d) is installed between the eccentric stopper (204c) and the positioning block (204b). When the arc plate moves on the carrier table (202), it can drive the eccentric stopper (204c) to rotate and the torsion spring (204d) to store energy.

3. The pneumatic arc plate milling machine fixture according to claim 2, characterized in that, A stop post (204c-1) is installed on the lower surface of the described eccentric stopper (204c). The stop post (204c-1) cooperates with the eccentric stopper (204c) to prevent the arc plate from detaching from the eccentric stopper (204c).

4. The pneumatic arc plate milling machine fixture according to claim 1, characterized in that, The described pneumatic clamping member (203) includes a rotary pressing cylinder (203a) and a clamping assembly (203b). When the rotary pressing cylinder (203a) operates, it can drive the clamping assembly (203b) to move up and down. After the clamping assembly (203b) moves downward and presses against the arc plate, it can clamp and fix the arc plate.

5. The pneumatic arc plate milling machine fixture according to claim 4, wherein, The described clamping assembly (203b) includes a connecting portion (203b-1) and a pressing portion (203b-2). The connecting portion (203b-1) is connected to the working end of the rotary pressing cylinder (203a), and the pressing portion (203b-2) is connected to the connecting portion (203b-1). When the rotary pressing cylinder (203a) operates, it drives the connecting portion (203b-1) and the pressing portion (203b-2) to move. When the pressing portion (203b-2) presses against the side of the arc plate, it can clamp and fix the arc plate.

6. The pneumatic arc plate milling machine fixture according to claim 5, wherein A clamping groove (203b-3) is formed on the lower surface of the described pressing portion (203b-2). When the pressing portion (203b-2) presses against the arc plate, the clamping groove (203b-3) clamps on the side of the arc plate, and the pressing portion (203b-2) presses against the arc plate to clamp and fix the arc plate.

7. The pneumatic arc plate milling machine fixture according to any one of claims 1-6, characterized in that, This fixture is fixedly installed on the base plate (100) through the fixed seat (201), and is installed on a milling machine through the base plate (100). A water collecting trough plate (101) is fixedly installed on the surface of the base plate (100), and the water collecting trough plate (101) encloses this fixture.

8. The pneumatic arc plate milling machine fixture according to claim 7, characterized in that, A drain groove (100a) is formed on the base plate (100) inside the water collecting trough plate (101), and the drain groove (100a) is used to drain the liquid in the water collecting trough plate (101).

9. The pneumatic arc plate milling machine fixture according to claim 4, characterized in that, A plurality of the pneumatic clamping members (203) are provided, and the rotary pressing cylinders (203a) in the pneumatic clamping members (203) are controlled to work through the same pipeline. The rotary pressing cylinders (203a) work by injecting and discharging gas, and thus can drive the clamping assemblies (203b) to move up and down.

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