Machining clamp for thin-wall parts

Abstract

The utility model discloses a fixture for machining thin-wall parts, which belongs to the field of fixtures and comprises a worktable, a plurality of groups of sliding chutes are circumferentially arranged at the top of the worktable, a clamping mechanism is arranged in the sliding chutes and comprises an adjusting block, and two vertical plates are slidably connected to the top of the adjusting block. The sides, close to each other, of the two vertical plates are connected with clamping plates through springs, guide assemblies are arranged between the vertical plates and the clamping plates, pressure sensors are arranged on the sides, close to the clamping plates, of the vertical plates, and power assemblies are arranged in the adjusting blocks. The device has the beneficial effects that after a part is placed on the workbench, the two vertical plates are driven by the power assembly to move in the direction close to each other at the same time, after one clamping plate abuts against the part, the two vertical plates continue to move, at the moment, an adjusting block starts to slide in a sliding groove, and the device is suitable for cylindrical thin-wall parts with different diameters; and the two clamping plates are used for clamping the part from the inner direction and the outer direction at the same time, and deformation caused by uneven stress of the part is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, and in particular to a fixture for machining thin-walled parts. Background Technology

[0002] Thin-walled metal parts have advantages such as light weight, small footprint, compact structure, and material saving, therefore, they are found in many mechanical products. A fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for operation or inspection; it is also called a clamp. Broadly speaking, any device used to quickly, conveniently, and safely install a workpiece at any stage of the manufacturing process can be called a fixture.

[0003] A search revealed Chinese Patent Publication No. CN220807262U, which discloses a general-purpose flexible fixture for thin-walled parts. The starting motor drives a bidirectional threaded rod to rotate inside two support plates. With the sleeves slidingly connected to the limit post and guide plate, the two sleeves change from rotational motion to relative movement. This causes the two sliding plates connected to the two sliding posts to slide inside the worktable. After the thin-walled part is placed on the top of the worktable, it is clamped and limited by the two clamping plates.

[0004] However, for thin-walled cylindrical parts, since the parts are hollow inside, clamping plates directly clamp and limit them from the outside, which can easily cause uneven stress on the cylindrical parts and deformation. Utility Model Content

[0005] The purpose of this invention is to provide a fixture for machining thin-walled parts in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A fixture for machining thin-walled parts includes a worktable. Multiple sets of sliding grooves are circumferentially arranged on the top of the worktable. Each groove contains a clamping mechanism. Each clamping mechanism includes an adjusting block slidably connected within the groove. Two vertical plates are slidably connected to the top of the adjusting block. A clamping plate is connected to the side of the two vertical plates that is close to each other via a spring. A guide assembly is provided between the vertical plates and the clamping plate to improve the stability of the clamping plate. A pressure sensor is provided on the side of the vertical plate close to the clamping plate. A power assembly is provided within the adjusting block to drive the two vertical plates to move synchronously in a direction that moves closer to or further away from each other.

[0008] Preferably, the power assembly includes a stepper motor, which is fixedly connected to one side of the adjusting block. The output end of the stepper motor is connected to a bidirectional lead screw via a coupling. The adjusting block has an internal mounting groove, and the bidirectional lead screw is rotatably connected in the mounting groove. Two symmetrically arranged sliders are threaded onto the bidirectional lead screw, and the sliders are slidably connected in the mounting groove. The top of the adjusting block has a clearance groove communicating with the mounting groove, and the top of the slider extends out of the adjusting block through the clearance groove. A vertical plate is fixedly connected to the top of the slider.

[0009] Preferably, the guide assembly includes a slide rod slidably connected within the vertical plate, a clamping plate fixedly connected to one end of the slide rod, and the other end of the slide rod extending out of the vertical plate and fixedly connected to a limiting plate.

[0010] Preferably, the clamping plate is arc-shaped.

[0011] Preferably, the top of the worktable is provided with multiple sets of scales, with one slide corresponding to one set of scales, and the scales are perpendicular to the slides.

[0012] Preferably, the side wall of the worktable is provided with multiple clearance holes that communicate with the slide groove. The clearance holes are located on the extension line of the slide groove extending toward the side wall of the worktable, and the size of the clearance holes is larger than the size of the stepper motor.

[0013] The beneficial effects are as follows: after the part is placed on the worktable, the two vertical plates are driven by the power unit to move towards each other at the same time. After one of the clamping plates comes into contact with the part, the two vertical plates continue to move. At this time, the adjusting block begins to slide in the slide groove, which is convenient for using cylindrical thin-walled parts of different diameters. At the same time, the two clamping plates clamp the part from both inside and outside directions to avoid uneven force on the part and deformation.

[0014] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of a jig for machining thin-walled parts according to the present invention;

[0017] Figure 2 This is a top view of a fixture for machining thin-walled parts as described in this utility model;

[0018] Figure 3 This is a schematic diagram of a clamping mechanism for a machining fixture for thin-walled parts according to the present invention;

[0019] Figure 4 This is a front view of a clamping mechanism for a machining fixture for thin-walled parts as described in this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the adjusting block of a jig for machining thin-walled parts according to the present invention.

[0021] The reference numerals in the attached drawings are explained as follows: 1. Worktable; 101. Slide groove; 102. Clearance hole; 201. Adjusting block; 202. Vertical plate; 203. Clamping plate; 204. Spring; 205. Slide rod; 206. Limiting plate; 207. Pressure sensor; 301. Stepper motor; 302. Two-way lead screw; 303. Slider; 4. Scale. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1-5 As shown, a fixture for machining thin-walled parts includes a worktable 1. Multiple sets of sliding grooves 101 are circumferentially arranged on the top of the worktable 1. Each sliding groove 101 contains a clamping mechanism. Each clamping mechanism includes an adjusting block 201 slidably connected within the sliding groove 101. Two vertical plates 202 are slidably connected to the top of the adjusting block 201. A clamping plate 203 is connected to one side of the two vertical plates 202 that are close to each other via a spring 204. The spring force of the spring 204 is greater than the frictional force between the adjusting block 201 and the sliding groove 101. The clamping plate 203 is arc-shaped, allowing for better contact with the inner and outer walls of the cylindrical thin-walled part, thus improving the clamping effect. The adjusting block 201 is slidably connected within the sliding groove 101, facilitating adaptive adjustment of its position according to the different diameters of the cylindrical thin-walled part, so that the side wall of the cylindrical thin-walled part is located between the two clamping plates 203.

[0026] The top of the worktable 1 is provided with multiple sets of scales 4. One slide 101 corresponds to one set of scales 4. The scales 4 are perpendicular to the slide 101. When the diameter of the part differs too much from the position of the clamping mechanism, the scales 4 make it easy to move multiple sets of clamping mechanisms to approximately the same position according to the diameter of the cylindrical thin-walled part.

[0027] A guide assembly is provided between the vertical plate 202 and the clamping plate 203. The guide assembly is used to improve the stability of the clamping plate 203. The guide assembly includes a slide rod 205 that is slidably connected in the vertical plate 202. The clamping plate 203 is fixedly connected to one end of the slide rod 205. The other end of the slide rod 205 extends out of the vertical plate 202 and is fixedly connected to a limit plate 206.

[0028] A pressure sensor 207 is provided on the side of the vertical plate 202 near the clamping plate 203. After the clamping plate 203 is in contact with the inner and outer walls of the part, the vertical plate 202 continues to move, and the clamping plate 203 comes into contact with the pressure sensor 207. The pressure sensor 207 balances the clamping force of the clamping plate 203 to avoid the clamping force being too large or too small.

[0029] The adjusting block 201 is equipped with a power assembly, which includes a stepper motor 301. The stepper motor 301 is bolted to one side of the adjusting block 201. The output end of the stepper motor 301 is connected to a bidirectional lead screw 302 via a coupling. The adjusting block 201 has an internal mounting groove, and the bidirectional lead screw 302 is rotatably connected in the mounting groove. Two symmetrically arranged sliders 303 are threaded onto the bidirectional lead screw 302. The sliders 303 are slidably connected in the mounting groove. The top of the adjusting block 201 has a clearance groove communicating with the mounting groove. The top of the slider 303 extends out of the adjusting block 201 through the clearance groove. The vertical plate 202 is fixedly connected to the top of the slider 303. When the stepper motor 301 is started, it drives the bidirectional lead screw 302 to rotate. The bidirectional lead screw 302 drives the two sliders 303 to move the adjusting block 201 in a direction that moves closer to or further away from each other.

[0030] The side wall of the workbench 1 is provided with a plurality of clearance holes 102 that communicate with the slide 101. The clearance holes 102 are located on the extension line of the slide 101 extending toward the side wall of the workbench 1. The size of the clearance holes 102 is larger than the size of the stepper motor 301. During the movement of the adjusting block 201, the stepper motor 301 can extend into the clearance holes 102 to increase the range of movement of the adjusting block 201.

[0031] Working Principle: In use, first place the cylindrical thin-walled part on the worktable 1, start the stepper motor 301, which drives the bidirectional lead screw 302 to rotate. The bidirectional lead screw 302 drives two sliders 303, causing the adjusting block 201 to move closer to each other. The adjusting block 201 drives two vertical plates 202 to move simultaneously closer to each other. One of the clamping plates 203 first abuts against the part. As the two vertical plates 202 continue to move, because the elastic force of the spring 204 is greater than the frictional force between the adjusting block 201 and the slide groove 101, the adjusting block 201... 1. The slide begins to slide within the groove 101 until both clamping plates 203 are in contact with the inner and outer walls of the cylindrical thin-walled part. At this point, the vertical plate 202 continues to move, the spring 204 begins to compress, the distance between the vertical plate 202 and the clamping plate 203 gradually decreases, and the clamping force gradually increases. The clamping force of the clamping plate 203 is balanced by the pressure sensor 207. When the clamping force reaches a certain level, the stepper motor 301 is turned off, and the adjusting block 201 stops moving. At the same time, the part is clamped from both the inner and outer directions by the two clamping plates 203 to avoid uneven force on the part and deformation.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for machining thin-walled parts, comprising a worktable (1), wherein the top circumferentially of the worktable (1) is provided with multiple sets of sliding grooves (101), characterized in that: Each of the slide grooves (101) is equipped with a clamping mechanism. The clamping mechanism includes an adjusting block (201) slidably connected in the slide groove (101). Two vertical plates (202) are slidably connected to the top of the adjusting block (201). A clamping plate (203) is connected to the side of the two vertical plates (202) that are close to each other by a spring (204). A guide component is provided between the vertical plates (202) and the clamping plate (203). The guide component is used to improve the stability of the clamping plate (203). A pressure sensor (207) is provided on the side of the vertical plate (202) that is close to the clamping plate (203). A power component is provided in the adjusting block (201). The power component is used to drive the two vertical plates (202) to move synchronously in a direction that is close to or far away from each other.

2. A fixture for machining thin-walled parts according to claim 1, characterized in that: The power assembly includes a stepper motor (301), which is fixedly connected to one side of the adjusting block (201). The output end of the stepper motor (301) is connected to a double-acting lead screw (302) via a coupling. The adjusting block (201) has an internal mounting groove, and the double-acting lead screw (302) is rotatably connected in the mounting groove. Two symmetrically arranged sliders (303) are threaded onto the double-acting lead screw (302), and the sliders (303) are slidably connected in the mounting groove. The top of the adjusting block (201) has a clearance groove communicating with the mounting groove, and the top of the slider (303) extends out of the adjusting block (201) through the clearance groove. The vertical plate (202) is fixedly connected to the top of the slider (303).

3. A fixture for machining thin-walled parts according to claim 1, characterized in that: The guide assembly includes a slide rod (205) slidably connected within the vertical plate (202), a clamping plate (203) fixedly connected to one end of the slide rod (205), and the other end of the slide rod (205) extending out of the vertical plate (202) and fixedly connected to a limiting plate (206).

4. A fixture for machining thin-walled parts according to claim 1, characterized in that: The clamp (203) is arc-shaped.

5. A fixture for machining thin-walled parts according to claim 1, characterized in that: The top of the workbench (1) is provided with multiple sets of scales (4), and one slide (101) corresponds to one set of scales (4). The scales (4) are perpendicular to the slide (101).

6. A fixture for machining thin-walled parts according to claim 2, characterized in that: The side wall of the workbench (1) is provided with a plurality of clearance holes (102) communicating with the slide (101). The clearance holes (102) are located on the extension line of the slide (101) extending toward the side wall of the workbench (1). The size of the clearance holes (102) is larger than the size of the stepper motor (301).

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