Automatic clamping device for special-shaped part machining of numerical control milling machine

Abstract

The utility model relates to the technical field of auxiliary machine manufacturing, in particular to an automatic clamping device for special-shaped part machining of a numerical control milling machine. Comprising a clamping table, two flexible clamping bodies are arranged on the clamping table, each flexible clamping body comprises an abutting assembly, the abutting assemblies are used for making contact with the uneven special-shaped part surface, a driving mechanism is arranged in the clamping table, and the top of the driving mechanism penetrates through the clamping table to be connected with the two flexible clamping bodies correspondingly; and the driving mechanism is used for driving the two flexible clamp bodies to move on the sliding piece. According to the utility model, the spring action is realized by utilizing the compressibility of gas, and the abutting component shares the part, so that compared with a structure for providing compensation by virtue of a compression spring, the compensation performance of the extrusion head which executes larger compression compensation for multiple times can be prevented from being inferior to that of other parts; the driving mechanism synchronously drives the two flexible clamp bodies to move, so that the abutting assemblies of the flexible clamp bodies can automatically and quickly clamp and fix the flexible parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to auxiliary mechanical manufacturing technical field especially, relates to a kind of automatic clamping device of special-shaped part processing of numerical control milling machine. BACKGROUND

[0002] Special-shaped part refers to the part of irregular shape, generally refers to the appearance of workpiece is non-standard workpiece, for example, the outer surface is concave-convex, when cutting processing of special-shaped part using numerical control milling machine, it needs to be fixed by the clamping device that is different from bench vice, i.e. can be attached to the concave-convex plane.

[0003] The existing technology is mostly through one or two groups of flexible clamps to clamp and fix special-shaped parts. The flexible clamp is mostly composed of multiple extrusion heads and compression springs connected with the multiple extrusion heads one by one. The extrusion head can be recessed or protruded according to the depth or height of the concave-convex part, so that the special-shaped part is extruded by the extrusion head to compensate the compression spring, and the multiple extrusion heads are abutted on the concave-convex part surface, so as to achieve the effect of fixing the special-shaped part.

[0004] When using the above-mentioned technology, it is found that the existing technology has the following technical problems: the compression spring connected with the extrusion head located in the middle part performs larger compression compensation each time, and the compression compensation performance of the compression spring in the middle part is inferior to that of the compression spring in other parts after long-term and multiple use; in addition, when moving one or two groups of flexible clamps to contact the special-shaped part, the flexible clamp is mostly moved by manually driving screw or transmission member. Therefore, a kind of automatic clamping device for special-shaped part processing of numerical control milling machine is designed to provide another technical solution for the above technical problems. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide an automatic clamping device for special-shaped part processing of numerical control milling machine which is not easy to perform larger compression compensation by multiple extrusion heads and can replace manual driving to move the flexible clamp part to contact.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] An automatic clamping device for special-shaped part processing of numerical control milling machine, comprising a clamping table, further comprising:

[0008] Two flexible clamp bodies are connected to the clamping table through a sliding member, and the two flexible clamp bodies are oppositely arranged and each include an abutting assembly for contacting the surface of the concave-convex special-shaped part; and

[0009] A driving mechanism is arranged in the clamping table and is composed of at least two linkage frames and a brake connected between the at least two linkage frames, the at least two linkage frames are respectively connected with the two flexible clamping bodies, and the linkage frames are used to drive the flexible clamping bodies to move on the clamping table through the sliding member.

[0010] As a preferred embodiment of the automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model, the two flexible clamping bodies further each comprise a shell accommodating an abutting component and a base fixed to the bottom of the shell, the base is used to enclose the abutting component in the shell, and a part of the abutting component is exposed outside the shell.

[0011] The sliding member is composed of at least one guide rail and at least two groups of sliding blocks arranged on the guide rail, and the at least two groups of sliding blocks are respectively fixed to the shells of the two flexible clamping bodies.

[0012] As a preferred embodiment of the automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model, the abutting component comprises a gas cavity, a plurality of gas pipes and a plurality of telescopic rods, the gas cavity is filled with gas, a one-way inflation connector is connected to the gas cavity, the gas cavity is located in the shell, and one end of the one-way inflation connector extends out of the shell.

[0013] A plurality of the gas pipes are fixed to the gas cavity, wherein the lower half of each gas pipe is located in the gas cavity, and the upper half of each gas pipe is fixed to the shell through a support.

[0014] The bottom end of each telescopic rod is located in one of the gas pipes, and the top of each telescopic rod is exposed to the shell.

[0015] As a preferred embodiment of the automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model, each telescopic rod comprises a rod body, a stop ring and a sliding seal, the stop ring is fixedly sleeved on the middle part of the rod body, and the sliding seal is fixedly sleeved on the bottom end of the rod body, and the sliding seal is used to make the rod body slide in the gas pipe to extrude the gas in the gas cavity.

[0016] As a preferred embodiment of the automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model, each linkage frame comprises two groups of transmission rods, a guide shaft and a sliding sleeve, the guide shaft is vertically fixed in the shell, and the sliding sleeve is movably sleeved on the sliding sleeve.

[0017] The two groups of transmission rods on the adjacent sides of the at least two linkage frames are jointly and rotatably connected in the clamping table, and the two groups of transmission rods of one linkage frame are respectively connected between the sliding sleeve, the brake and the shell of the flexible clamping body.

[0018] The brake is used for driving the sliding sleeve to slide on the guide shaft through the transmission rod group, and driving the sliding block to slide on the guide rail through the shell.

[0019] As a preferred embodiment of the automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model, the transmission rod group comprises a lever, a supporting rod, a first connecting rod and a second connecting rod, the lever is rotationally connected in the clamping table, one end of the lever is rotationally connected with the first connecting rod, the other end of the lever is rotationally connected with the brake, one end of the first connecting rod is rotationally connected with the shell of the flexible clamping body, and the other end of the first connecting rod is rotationally connected with the sliding sleeve.

[0020] One end of the supporting rod is fixed on the lever, the other end of the supporting rod is rotationally connected with the second connecting rod, and one end of the second connecting rod is rotationally connected with the sliding sleeve.

[0021] It can be seen without doubt that the above technical scheme of the application can certainly solve the technical problems to be solved by the application.

[0022] Meanwhile, by means of the above technical scheme, the utility model has at least the following beneficial effects:

[0023] The automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model realizes the action of the spring by using the compressibility of gas, and lets the abutting assembly share the part, so that, compared with a structure that provides compensation by means of a compression spring, the compensation performance of the extrusion head that is executed multiple times and has a large compression compensation can be made worse than that of other parts.

[0024] The automatic clamping device for machining special-shaped parts of a numerical control milling machine provided by the utility model is driven by the driving mechanism to move the two flexible clamping bodies, so that the abutting assembly of the flexible clamping body can automatically and quickly clamp and fix the flexible part. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0026] Figure 1 It is a whole structure schematic view of the automatic clamping device for machining special-shaped parts of a numerical control milling machine of the utility model;

[0027] Figure 2 It is a partial internal structure schematic view of the clamping table in a cross section of the automatic clamping device for machining special-shaped parts of a numerical control milling machine of the utility model;

[0028] Figure 3This utility model relates to an automatic clamping device for machining irregularly shaped parts on a CNC milling machine. Figure 1 The structural schematic diagram shown is based on the explosive decomposition.

[0029] Figure 4 This is a schematic diagram of a single transmission rod assembly of the automatic clamping device for machining irregular parts on a CNC milling machine according to this utility model.

[0030] Figure 5 This is a schematic diagram showing the structure of the flexible clamping body of the automatic clamping device for machining irregular parts on a CNC milling machine according to the present invention.

[0031] Figure 6 This utility model relates to an automatic clamping device for machining irregularly shaped parts on a CNC milling machine. Figure 5 A further enlarged and cross-sectional view of the internal structure of the middle abutment component;

[0032] Figure 7 The accompanying drawing shows the automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to this utility model. Figure 6 A cross-sectional view of the telescopic rod located inside the trachea;

[0033] In the diagram: 1. Clamping table; 2. Flexible clamping body; 21. Abutment assembly; 211. Air chamber; 212. Air pipe; 213. Telescopic rod; 214. Rod body; 215. Retaining ring; 216. Sliding seal; 22. Housing; 23. Base; 3. Sliding component; 31. Guide rail; 32. Slider; 4. Drive mechanism; 41. Linkage frame; 411. Guide shaft; 412. Sliding sleeve; 413. Lever; 414. Support rod; 415. First connecting rod; 416. Second connecting rod; 42. Brake. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] like Figure 1 As shown, the automatic clamping device for machining irregular parts on a CNC milling machine includes a clamping table 1, on which two flexible clamping bodies 2 are provided. Specifically, the two flexible clamping bodies 2 are located on the top of the clamping table 1 in a left-right opposite manner through a sliding member 3. The sliding member 3 enables the two flexible clamping bodies 2 to move relative to each other, thereby fixing the irregular parts between the two flexible clamping bodies 2.

[0039] like Figure 2 As shown, the clamping platform 1 has a hollowed-out space inside, and a drive mechanism 4 is provided in the space. The top of the drive mechanism 4 passes through the clamping platform 1 and is connected to two flexible clamps 2 respectively. The drive mechanism 4 is used to drive the two flexible clamps 2 to move closer to each other on the sliding member 3, or to move away from each other to one side, providing the driving force for the flexible clamps 2 to move.

[0040] like Figure 3 As shown, the slider 3 consists of at least one guide rail 31 (including but not limited to this, two sets are shown in the figure) and at least two sets of sliders 32 (including but not limited to this) disposed on the guide rail 31. The at least two sets of sliders 32 are respectively fixed to two flexible clamps 2. The flexible clamps 2 are pushed by the drive mechanism 4, which in turn drives the sliders 32 connected to the bottom to slide on the guide rail 31, so that the flexible clamps 2 move closer to or away from the other flexible clamps 2.

[0041] The drive mechanism 4 located in the clamping table 1 consists of at least two linkage frames 41 (including but not limited to these) and a brake 42 connected between the at least two linkage frames 41. Both linkage frames 41 are connected to two flexible clamps 2. The brake 42 drives the linkage frames 41 to rotate, thereby causing the linkage frames 41 to drive the flexible clamps 2 to move on the guide rail 31 on the clamping table 1 via the slider 32, so as to expand or reduce the distance between the two flexible clamps 2, so that the two flexible clamps 2 can combine to fix the irregular parts or detach them from the irregular parts.

[0042] It should be noted that the brake 42 includes, but is not limited to, any cylinder driven by electric, pneumatic or hydraulic means. Any component, structure or device that can provide linear drive is acceptable. A controller (not shown in the figure) is installed on the clamping table 1 to control the start and stop of the brake 42. Taking the brake 42 as an example, the cylinder is connected to a hydraulic station. The controller is electrically connected to the hydraulic station and controls the hydraulic station to supply or withdraw hydraulic oil to the cylinder. The piston rod of the cylinder extends or retracts into the cylinder through the input or output of hydraulic oil.

[0043] Furthermore, such as Figure 4 As shown and referenced Figure 3 At least two linkage frames 41 each include two transmission rod assemblies ( Figure 4(The same parts are omitted, and the omitted parts are equivalent to the parts shown in the reference), guide shaft 411 and sliding sleeve 412. The guide shaft 411 is vertically fixed inside the housing 22, and the sliding sleeve 412 is movably sleeved on the sliding sleeve 412.

[0044] The two transmission rod groups on the adjacent sides of the two linkage frames 41 are rotatably connected in the clamping table 1, and the two transmission rod groups of one linkage frame 41 are respectively connected between the sliding sleeve 412, the brake 42 and the shell 22 of the flexible clamp 2.

[0045] Taking the brake 42 as an example of a hydraulic cylinder, since the two transmission rod groups on adjacent sides (i.e. concentrated on the left or right side) are rotatably connected to the free end of the hydraulic cylinder piston rod or the end of the cylinder body away from the piston rod, when the hydraulic cylinder piston rod is supplied with hydraulic oil or retracted to make piston movement, it will drive the transmission rod groups on the opposite side (i.e. the left and right sides) to move synchronously. The movement of the driven transmission rod groups is manifested as: driving the sliding sleeve 412 to slide on the guide shaft 411, driving the flexible clamp 2 and pushing the slider 32 to slide on the guide rail 31;

[0046] Furthermore, each transmission rod assembly includes a lever 413, a support rod 414, a first connecting rod 415, and a second connecting rod 416. The lever 413 is rotatably connected to the clamping table 1. One end of the lever 413 is rotatably connected to the first connecting rod 415, and the other end of the lever 413 is rotatably connected to the brake 42. One end of the first connecting rod 415 is rotatably connected to the flexible clamp 2.

[0047] One end of the support rod 414 is fixed to the lever 413, and the other end of the support rod 414 is rotatably connected to the second connecting rod 416. One end of the second connecting rod 416 is rotatably connected to the sliding sleeve 412.

[0048] When the piston rod of the hydraulic cylinder extends, it will affect one end of the piston rod or cylinder body connecting lever 413 (i.e., as shown in the image). Figure 4 The lever 413 is subjected to force at the bottom end, causing it to rotate around the part that is rotatably connected to the clamping table 1. At the same time, the other end of the lever 413 (i.e. the end connected to the first connecting rod 415) pulls or pushes the flexible clamp 2 to move forward or backward on the clamping table 1 through the first connecting rod 415.

[0049] The support rod 414 drives the sliding sleeve 412 to slide on or off the guide shaft 411 via the second connecting rod 416. By driving the sliding sleeve 412 to slide on the guide shaft 411 via the support rod 414, the rotational damping of the lever 413 is increased, thereby improving the rotational stability of the lever 413.

[0050] like Figure 5 As shown and referenced Figure 1 - Figure 3Both flexible clamps 2 include an abutment component 21, a housing 22 for accommodating the abutment component 21, and a base 23 fixed to the bottom of the housing 22. The base 23 is used to enclose the abutment component 21 inside the housing 22. A portion of the abutment component 21 located inside the housing 22 is exposed outside the housing 22. The portion of the abutment component 21 exposed outside the housing 22 can contact the uneven surface of the irregular part. In this way, the abutment component 21 contacts the surface of the irregular part in a small area, thereby achieving the effect of fixing the irregular part.

[0051] Furthermore, such as Figure 6 As shown and referenced Figure 5 The contact component 21 includes an air chamber 211, several air pipes 212 and several telescopic rods 213. The air chamber 211 is filled with gas and a one-way inflation connector is connected to the air chamber 211. The air chamber 211 is located inside the housing 22. One end of the one-way inflation connector extends out of the housing 22. The one-way inflation connector is used to connect to an air pump. A certain amount of gas is injected into the air chamber 211 through the air pump. The one-way inflation connector includes, but is not limited to, an inflation valve. However, any other component that can make it impossible for the gas to flow out irreversibly after it is input can be used.

[0052] A matrix of several tracheas 212 are fixed on the air chamber 211, wherein the lower half of the trachea 212 is located inside the air chamber 211, and the upper half of the trachea 212 is fixed to the shell 22 by a bracket. When the trachea 212 is fixed, it plays a role in restraining the air chamber 211 from being compressible, so that the gas inside the air chamber 211 can only be squeezed from inside the trachea 212.

[0053] The air chamber 211 itself has a certain elasticity and is preferably made of rubber material. When the air chamber 211 is located in the housing 22, there is a certain gap between the air chamber 211 and the housing 22. In this way, when the gas in the air chamber 211 is compressed, the compressed gas will expand the air chamber 211 and deform outward along its own circumference. Conversely, the air chamber 211 will also drive the internal gas to further enter the air tube 212.

[0054] The bottom ends of several telescopic rods 213 are located in several air pipes 212, and the tops of several telescopic rods 213 protrude from the housing 22. Since the gas is compressible, it can play a role roughly equivalent to a spring. This causes the telescopic rods 213 to be squeezed and moved downward in the air pipes 212 when they are subjected to uneven surfaces of irregular parts. The movement of the telescopic rods 213 in the air pipes 212 achieves the effect of squeezing the gas in the air chamber 211. When the telescopic rods 213 do not come into contact with irregular parts, the air chamber 211 returns to its original position and drives the gas into the air pipes 212. As the gas enters from the air chambers 211 in the air pipes 212, the gas lifts the telescopic rods 213 and moves them upward when they return to their original position in the air pipes 212.

[0055] Furthermore, such as Figure 7 As shown and referenced Figure 6 Each telescopic rod 213 includes a rod body 214, a retaining ring 215, and a sliding seal 216. The sliding seal 216 is fixedly sleeved on the bottom end of the rod body 214. The sliding seal 216 is a sliding mechanical seal. Specifically, the sliding seal 216 allows the rod body 214 to slide inside the air tube 212 while sealing the inside of the air tube 212 below the sliding seal 216. This restricts the gas in the air chamber 211 from leaking out through the gap between the air tube 212 and the rod body 214, thus preventing the rod body 214 from sliding down inside the air tube 212 and failing to compress the gas in the air chamber 211.

[0056] A retaining ring 215 is fixedly sleeved on the middle of the rod 214. The retaining ring 215 restricts the rod 214 from entering the air tube 212 completely and restricts the rod 214 from being completely exposed outside the housing 22. When the rod 214 returns to its original position and moves upward, it causes the retaining ring 215 to contact the inner top wall of the housing 22. This ensures that the lengths of the rods 214 exposed outside the housing 22 are all consistent.

[0057] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic clamping device for machining irregularly shaped parts on a CNC milling machine, comprising a clamping table (1), characterized in that, Also includes: Two flexible clamps (2) are connected to the clamping table (1) via a sliding member (3), and the two flexible clamps (2) are arranged opposite to each other and each includes an abutment component (21) for contacting the uneven surface of the irregular part; and The drive mechanism (4) is located inside the clamping table (1) and consists of at least two linkage frames (41) and a brake (42) connected between the at least two linkage frames (41). The at least two linkage frames (41) are respectively connected to two flexible clamps (2). The linkage frames (41) are used to drive the flexible clamps (2) to move on the clamping table (1) through the sliding member (3).

2. The automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to claim 1, characterized in that, Both of the flexible clamps (2) also include a housing (22) for accommodating the abutment component (21) and a base (23) fixed to the bottom of the housing (22), the base (23) for enclosing the abutment component (21) inside the housing (22), a portion of the abutment component (21) protruding outside the housing (22); The sliding member (3) consists of at least one guide rail (31) and at least two sets of sliders (32) disposed on the guide rail (31), and the at least two sets of sliders (32) are respectively fixed to the housing (22) of the two flexible clamps (2).

3. The automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to claim 2, characterized in that, The contact assembly (21) includes an air chamber (211), several air pipes (212) and several telescopic rods (213). The air chamber (211) is filled with gas. A one-way inflation connector is connected to the air chamber (211). The air chamber (211) is located inside the housing (22). One end of the one-way inflation connector extends out of the housing (22). A plurality of the tracheas (212) are fixed in an array on an air chamber (211), wherein the lower half of the tracheas (212) is located inside the air chamber (211), and the upper half of the tracheas (212) is fixed to the housing (22) by a bracket; The bottom ends of several of the telescopic rods (213) are located inside several air tubes (212), and the tops of several of the telescopic rods (213) are exposed outside the housing (22).

4. The automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to claim 3, characterized in that, Each of the aforementioned telescopic rods (213) includes a rod body (214), a retaining ring (215), and a sliding seal (216). The retaining ring (215) is fixedly sleeved on the middle part of the rod body (214), and the sliding seal (216) is fixedly sleeved on the bottom end of the rod body (214). The sliding seal (216) is used to allow the rod body (214) to slide within the air tube (212) to compress the gas in the air chamber (211).

5. The automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to claim 1 or 3, characterized in that, At least two of the linkage frames (41) each include two transmission rod groups, a guide shaft (411) and a sliding sleeve (412). The guide shaft (411) is vertically fixed inside the housing (22), and the sliding sleeve (412) is movably sleeved on the sliding sleeve (412). At least two of the two linkage frames (41) have two transmission rod groups on adjacent sides rotatably connected in the clamping table (1), and the two transmission rod groups of one linkage frame (41) are respectively connected between the sliding sleeve (412), the brake (42) and the housing (22) of the flexible clamp (2); The brake (42) is used to drive the sliding sleeve (412) to slide on the guide shaft (411) through the transmission rod assembly, and to push the slider (32) to slide on the guide rail (31) through the housing (22).

6. The automatic clamping device for machining irregularly shaped parts on a CNC milling machine according to claim 5, characterized in that, The transmission rod assembly includes a lever (413), a support rod (414), a first connecting rod (415), and a second connecting rod (416). The lever (413) is rotatably connected to the clamping table (1). One end of the lever (413) is rotatably connected to the first connecting rod (415), and the other end of the lever (413) is rotatably connected to the brake (42). One end of the first connecting rod (415) is rotatably connected to the housing (22) of the flexible clamp (2). One end of the support rod (414) is fixed to the lever (413), and the other end of the support rod (414) is rotatably connected to the second connecting rod (416), and one end of the second connecting rod (416) is rotatably connected to the sliding sleeve (412).

Images