Clamp tool for CNC machining

Abstract

The utility model provides a clamp tool for CNC machining, belongs to the technical field of CNC machining, and solves the problem that in the prior art, a fixing mode adopting suction cup adsorption is not suitable for thin workpieces. The clamping device comprises a base plate, a plurality of positioning blocks making contact with the outer edge of a workpiece are arranged on the base plate, and a pressing mechanism used for pressing and fixing the workpiece is installed on the base plate. The placing position of the workpiece is positioned through the multiple positioning blocks, then the workpiece is pressed on the base plate through the pressing mechanism, the situation that the thin workpiece deforms due to negative pressure adsorption is avoided, and meanwhile the problem that the workpiece fixing effect is poor due to the fact that the adsorption force of the suction cup becomes small after the thin workpiece deforms is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of CNC processing, in particular to a clamp tooling for CNC processing. Background Art

[0002] Generally, CNC machining usually refers to computer digital controlled precision machining, such as CNC lathes, CNC milling machines, CNC boring and milling machines, etc.

[0003] When processing, the workpiece needs to be positioned to ensure the processing accuracy. The existing fixture adopts a suction cup adsorption method. For example, the patent with patent number CN218397096U discloses a CNC vacuum suction cup clamping mechanism, which sets an annular sealing groove at the edge of the module placement area, and the rubber ring is partially embedded in the annular sealing groove. When the module is fixed by the suction cup adsorption method, the rubber ring is deformed by the pressure of the module edge, which can make the front of the module fit the module placement area completely, and the module is firmly and stably fixed in the processing area, ensuring that the module will not produce shaking during processing, thereby affecting the processing accuracy of the copper column. The copper column processing accuracy has been optimized, thereby effectively solving the problem of the break at the splicing of the display unit after assembly due to the inconsistent height of the copper column, eliminating the bright line formed by the break at the splicing position of the display unit, thereby optimizing the display effect. However, when adsorbing and fixing a thinner workpiece, the workpiece will be thin and deformed. The workpiece cannot be adsorbed, and the workpiece is easily knocked off during processing, causing damage to the machine. Therefore, the suction cup adsorption fixation method is not suitable for thinner workpieces. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a CNC machining fixture, which locates the placement position of the workpiece by means of several positioning blocks, and then presses the workpiece onto the substrate by a clamping mechanism, thereby avoiding deformation of thinner workpieces due to negative pressure adsorption, and also avoiding the problem of poor workpiece fixing effect caused by the reduced adsorption force of the suction cup after the thinner workpiece is deformed.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A CNC machining fixture comprises a base plate, a plurality of positioning blocks in contact with the outer edge of a workpiece are arranged on the base plate, and a clamping mechanism for pressing down and fixing the workpiece is installed on the base plate.

[0007] Preferably, the clamping mechanism comprises a first pressing block movably arranged on the base plate, the first pressing block is provided with a strip-shaped through groove, and a first screw rod threadably connected to the base plate is movably arranged in the strip-shaped through groove.

[0008] Preferably, a first step adapted to the workpiece is formed at one end of the first pressing block close to the workpiece.

[0009] Preferably, a fixing seat installed on the substrate is provided on the side of the first pressure block away from the workpiece, a first elastic member is connected between the fixing seat and the first pressure block, a card slot located between the fixing seat and the first pressure block is opened on the substrate, and a card block cooperating with the card slot is provided on the end face of the first pressure block close to the substrate.

[0010] Preferably, the fixing seat is detachably connected to the base plate.

[0011] Preferably, the clamping mechanism further comprises a second pressing block movably arranged on the base plate, and the second pressing block is provided with a second screw rod movably penetrating the second pressing block and being threadedly connected to the base plate.

[0012] Preferably, the second pressing block is provided with a second step adapted to the workpiece.

[0013] Preferably, a second elastic member is connected between the second pressing block and the base plate.

[0014] Preferably, at least two second elastic members are provided and are located on both sides of the second screw.

[0015] Preferably, the positioning block is a cylinder.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The workpiece is positioned by several positioning blocks, and then the workpiece is pressed against the substrate by a clamping mechanism, which prevents the thinner workpiece from being deformed due to negative pressure adsorption. It also avoids the problem of poor workpiece fixing effect caused by the reduced adsorption force of the suction cup after the thinner workpiece is deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the main structure provided for an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of a three-dimensional structure provided for an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the three-dimensional structure of the first pressing block and the fixing seat provided in an embodiment of the utility model;

[0022] Figure 4This is a schematic diagram of the three-dimensional structure of the second pressing block provided in an embodiment of the utility model.

[0023] Description of the drawings: 1-base plate; 2-second screw rod; 3-second pressure block; 4-workpiece; 5-positioning block; 6-first pressure block; 7-strip through groove; 8-first screw rod; 9-slot; 10-fixed seat; 11-first elastic member; 12-block; 13-first step; 14-second elastic member; 15-second step. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Combine the following Figure 1-Figure 4 The utility model is described in detail.

[0028] Example

[0029] A CNC machined fixture comprises a base plate 1, on which are arranged a plurality of positioning blocks 5 in contact with the outer edge of a workpiece 4, and on which is installed a clamping mechanism for pressing down and fixing the workpiece 4. The clamping mechanism comprises a first clamping block 6 movably arranged on the base plate 1, on which is arranged a strip-shaped through groove 7, in which is arranged a first screw 8 threadedly connected to the base plate 1. The first screw 8 keeps its position stationary, and the first clamping block 6 can adjust its position through the strip-shaped through groove 7, so as to move to the top of the workpiece 4, and then the first screw 8 is tightened to press the first clamping block 6 against the workpiece 4, so as to fix the workpiece 4.

[0030] The first pressing block 6 has a first step 13 adapted to the workpiece 4 at one end thereof close to the workpiece 4. The first step 13 can assist the first pressing block 6 to quickly press on the edge of the workpiece 4, and prevent the first pressing block 6 from extending into the processing area of ​​the workpiece 4.

[0031] A fixing seat 10 mounted on the substrate 1 is provided on the side of the first pressing block 6 away from the workpiece 4, a first elastic member 11 is connected between the fixing seat 10 and the first pressing block 6, a card slot 9 is provided on the substrate 1 between the fixing seat 10 and the first pressing block 6, and a card block 12 cooperating with the card slot 9 is provided on the end surface of the first pressing block 6 close to the substrate 1. The first elastic member 11 can assist the first step 13 on the first pressing block 6 to press against the edge of the workpiece 4, and can also limit the movement of the first pressing block 6, so that the first pressing block 6 moves along the length direction of the strip through groove 7, and avoids the first pressing block 6 rotating around the first screw 8, which causes the first step 13 to not fit well on the workpiece 4; the card block 12 cooperates with the card slot 9 to retract the first pressing block 6, so as to facilitate the placement of the workpiece 4.

[0032] The fixing base 10 is detachably connected to the base plate 1, so that the fixing base 10 and the first elastic member 11 can be replaced conveniently. The fixing base 10 can be connected by a screw, such as Figure 3 As shown, the screw rod vertically penetrates the fixing seat 10 and is threadedly connected to the base plate 1 .

[0033] The clamping mechanism also includes a second clamping block 3 movably arranged on the base plate 1, and a second screw 2 movably passing through the second clamping block 3 and threadedly connected to the base plate 1 is arranged on the second clamping block 3, and a second step 15 adapted to the workpiece 4 is formed on the second clamping block 3. When fixing some workpieces 4 with special shapes, the second clamping block 3 can be used for fixing. Figure 1 and 2The workpiece 4 shown has a concave structure in the middle. If the first pressing block 6 is used to fix it, at least two first pressing blocks 6 are required to abut and fix the concave arc-shaped part. However, due to the small size of the workpiece 4, it is inconvenient to install two first pressing blocks 6, and the first pressing block 6 cannot abut against the arc-shaped part well. The second pressing block 3 can press on the edge of the workpiece 4 through the arc-shaped second steps 15 on both sides, and tighten the second screw 2 to achieve the pressing and fixing of the workpiece 4. The straight edge of the workpiece 4 continues to be fixed by the first pressing block 6.

[0034] A second elastic member 14 is connected between the second pressing block 3 and the base plate 1. The second elastic member 14 assists the second pressing block 3 to spring up when the second screw 2 is loosened, thereby facilitating the picking up of the workpiece 4; the second elastic member 14 can also limit the second pressing block 3 from rotating around the second screw 2 to prevent the second step 15 from not aligning with the workpiece 4.

[0035] At least two second elastic members 14 are provided and are located on both sides of the second screw rod 2 , so that the second pressing block 3 can be pressed downward in a balanced manner.

[0036] The positioning block 5 is a cylinder, and the contact area between the cylinder and the side of the workpiece 4 is small, which is conducive to the smooth placement and removal of the workpiece 4.

[0037] The first elastic member 11 and the second elastic member 14 are both springs.

[0038] The use process of the clamping tool is as follows: before placing the workpiece 4, first loosen the first screw 8 and the second screw 2, then move the first pressure block 6 backwards to make the clamping block 12 snap into the clamping slot 9; then put the workpiece 4 into the placement area surrounded by the positioning block 5, pull the first pressure block 6 out of the clamping slot 9 and loosen it, the first pressure block 6 is bounced by the first elastic member 11 to abut the workpiece 4, and finally tighten the first screw 8 and the second screw 2 to complete the placement of the workpiece 4. The clamping tool of the present application can quickly clamp the workpiece 4, and it is convenient and quick to use when clamping the workpiece 4. The workpiece 4 can reduce deformation, improve work efficiency and reduce damage in many aspects.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A CNC machined fixture, comprising a base plate (1), characterized in that: The base plate (1) is provided with a plurality of positioning blocks (5) in contact with the outer edge of the workpiece (4), and a clamping mechanism for pressing down and fixing the workpiece (4) is installed on the base plate (1).

2. A CNC machining fixture according to claim 1, characterized in that: The clamping mechanism comprises a first pressing block (6) movably arranged on the base plate (1), the first pressing block (6) being provided with a strip-shaped through groove (7), and a first screw rod (8) threadedly connected to the base plate (1) being movably arranged in the strip-shaped through groove (7).

3. A CNC machining fixture according to claim 2, characterized in that: An end of the first pressing block (6) close to the workpiece (4) is provided with a first step (13) adapted to the workpiece (4).

4. A CNC machining fixture according to claim 2, characterized in that: A fixing seat (10) mounted on the substrate (1) is arranged on the side of the first pressing block (6) away from the workpiece (4); a first elastic member (11) is connected between the fixing seat (10) and the first pressing block (6); a clamping groove (9) located between the fixing seat (10) and the first pressing block (6) is provided on the substrate (1); and a clamping block (12) cooperating with the clamping groove (9) is arranged on the end surface of the first pressing block (6) close to the substrate (1).

5. A CNC machining fixture according to claim 4, characterized in that: The fixing seat (10) is detachably connected to the base plate (1).

6. A CNC machining fixture according to claim 1, characterized in that: The clamping mechanism further comprises a second pressing block (3) movably arranged on the base plate (1), and the second pressing block (3) is provided with a second screw rod (2) movably penetrating the second pressing block (3) and being threadedly connected to the base plate (1).

7. A CNC machining fixture according to claim 6, characterized in that: The second pressing block (3) is provided with a second step (15) adapted to fit the workpiece (4).

8. A CNC machining fixture according to claim 6, characterized in that: A second elastic member (14) is connected between the second pressing block (3) and the base plate (1).

9. A CNC machining fixture according to claim 8, characterized in that: At least two second elastic members (14) are provided and are located on both sides of the second screw rod (2).

10. The CNC machining fixture according to claim 1, characterized in that: The positioning block (5) is a cylinder.

Images