A CNC machining jig capable of quick clamping

Abstract

The utility model provides a kind of CNC machining jig of quick clamping, including general base and at least one group of die matched with general base, each group of die includes positioning jig and cover plate, general base is equipped with at least two lower installation holes, each lower installation hole is matched with draw-in nail, spring is sleeved on draw-in nail, spring is in lower installation hole, draw-in nail includes draw-in nail stem, draw-in nail stem top is formed with draw-in nail head, and draw-in nail stem bottom is equipped with extrusion seat;Positioning jig is equipped with at least two through holes corresponding with lower installation hole;Cover plate is equipped with at least two upper installation holes, each upper installation hole is divided into big hole and small hole, and big hole is communicated with small hole.Compared with prior art, the general base in the CNC machining jig can be matched with multiple dies, push-top draw-in nails are used, the cover plate is translated, the draw-in nail is displaced between the big hole and the small hole, and the cover plate and the positioning jig are positioned on the general base under the action of the spring force;Thus, the cover plate and the base do not need to be fixed by screwing, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures, and in particular to a CNC machining fixture that can be quickly clamped. Background Technology

[0002] Currently, CNC machining fixtures for individual products (such as die castings, forgings, etc.) are generally composed of a cover plate and a base. The cover plate needs to be fixed and locked to the base with more than 10 screws. During each assembly, manual alignment is required, and then each screw is gradually tightened. This results in low production efficiency and high workload for employees.

[0003] Therefore, there is still much room for improvement in traditional CNC machining fixtures. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a CNC machining fixture that can be quickly clamped, eliminating the need to fix the cover plate and base with screws, thereby improving work efficiency and reducing the workload of employees.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A CNC machining fixture capable of quick clamping includes a universal base and at least one set of molds that mate with the universal base. Each set of molds includes a positioning fixture and a cover plate that are detachably mounted on the universal base. The universal base has at least two lower mounting holes, and a pull stud for positioning the cover plate is fitted into each lower mounting hole. A spring is fitted onto the pull stud, and the spring is located within the lower mounting hole. The pull stud includes a pull stud rod, the top of which forms a pull stud head, and the bottom of which has a compression seat for compressing the spring during assembly and disassembly. The positioning fixture has at least two through holes corresponding to the lower mounting holes on the universal base. The cover plate has at least two upper mounting holes corresponding to the lower mounting holes. Each upper mounting hole is divided into a large hole for the pull stud head to pass through during assembly and disassembly and a small hole for preventing the pull stud head from passing through during positioning. The large hole and the small hole are connected.

[0007] Preferably, the lower mounting hole is a stepped hole, the spring and the compression seat are located inside the outer hole of the lower mounting hole, the pull pin passes through the inner hole of the lower mounting hole, and the diameter of the outer hole is larger than the diameter of the inner hole.

[0008] Preferably, the pull rod has a groove, and the compression seat is a retaining spring.

[0009] More preferably, the bottom of the rivet rod is provided with a screw hole, and the pressing seat is a screw that mates with the screw hole.

[0010] Preferably, a mounting groove for accommodating the rivet head is provided around the small hole.

[0011] Preferably, the orientation of the small holes in each mounting hole of the cover plate is consistent with the unlocking movement direction of the cover plate, and the orientation of the large holes in each mounting hole is consistent with the clamping movement direction of the cover plate.

[0012] More preferably, the upper mounting holes in the cover plate are arranged in columns, and correspondingly, the through holes in the positioning fixture are arranged in columns, and the lower mounting holes on the base are arranged in columns.

[0013] More preferably, the last mounting hole in each row of mounting holes in the cover plate is a U-shaped groove.

[0014] Preferably, the CNC machining fixture further includes a pusher plate for use when the cover plate needs to be installed and removed.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a CNC machining fixture that can be quickly clamped. The universal base can be used with multiple sets of molds. During clamping, a push-pull rivet is used to slide the cover plate, so that the rivet head is stuck outside the small hole. Under the action of the spring, the cover plate and the positioning fixture are positioned on the universal base. When unlocking, a push-pull rivet is used to slide the cover plate in the opposite direction, so that the rivet head passes through the large hole, realizing the separation of the cover plate from the base. This method of clamping and disassembling the cover plate does not require fixing the cover plate and the base with screws one by one, improving work efficiency and reducing the workload of employees. Attached Figure Description

[0016] Figure 1 An exploded view of a CNC machining fixture that can be quickly clamped according to this utility model.

[0017] Figure 2 This is a schematic diagram of a pull stud in a CNC machining fixture that can be quickly clamped according to the present invention.

[0018] Figure 3 The side view of the clamping cover plate in a CNC machining fixture that can be quickly clamped according to this utility model.

[0019] Figure 4 This is a top view of the clamping cover plate in a CNC machining fixture that can be quickly clamped according to the present invention.

[0020] Figure 5 This is a side view of the disassembly cover plate in a CNC machining fixture that can be quickly clamped according to the present invention.

[0021] Figure 6 This is a top view of the disassembly cover plate in a CNC machining fixture that can be quickly clamped according to the present invention. Detailed Implementation

[0022] The preferred embodiments of this utility model will be described in detail with reference to the accompanying drawings.

[0023] Figures 1 to 6 This is a preferred embodiment of a CNC machining fixture that can be quickly clamped, provided by this utility model. For example... Figures 1 to 6 As shown, the quick-clamping CNC machining fixture includes a universal base 10 and at least one set of molds 20 that mate with the universal base 10. Each set of molds 20 includes a positioning fixture 21 detachably mounted on the universal base 10 and a cover plate 22. The universal base 10 has at least two lower mounting holes 11, and each lower mounting hole 11 is fitted with a pull stud 12 for positioning the cover plate 22. A spring 13 is sleeved on the pull stud 12 and is located within the lower mounting hole 11. The pull stud 12 includes a pull stud rod 121, with a pull stud head 122 formed at the top of the pull stud rod 121 and a compression seat 123 at the bottom of the pull stud rod 121 for compressing the spring during assembly and disassembly. The positioning fixture 21 has at least two through holes 211 corresponding to the lower mounting holes 11 on the universal base 10. The cover plate 22 has at least two upper mounting holes 221 corresponding to the lower mounting holes 11, each upper mounting hole 221 being divided into sections for supplying the pull stud head during assembly and disassembly. The large hole 2211 through which the rivet head 122 passes and the small hole 2212 used to prevent the rivet head 122 from passing through during positioning are connected. Thus, during assembly, a set of required molds 20 is selected first. The positioning fixture 21 in the mold 20 is detachably mounted on the universal base 10. The through holes 211 on the positioning fixture 21 are aligned with the lower mounting holes 11. The rivet rod 121 of the rivet 12 passes through the through holes 211, holding the positioning fixture in place. 21 and the universal base 10 remain stationary. Using external force, push the pull pin 12 upward from below the universal base 10, compressing the spring 13. Place the cover plate 22 downward, aligning the large hole 2211 of each mounting hole 221 in the cover plate 22 with the pull pin 12 on the base 10. The large hole 2211 passes through the pull pin head 122 of the pull pin 12, with the pull pin head 122 positioned above the cover plate 22. Then, move the cover plate 22 horizontally, allowing the pull pin 12 to enter the small hole 2212 from the large hole 2211. Figure 4 As shown, since the rivet head 122 cannot pass through the small hole 2212, the rivet head 122 is stuck in the small hole 2212. After the external force is removed, the spring 13 stretches, and its elastic force tightens the cover plate and the fixture, thus allowing the product to be processed. When it is necessary to remove the product, the rivet 12 is pushed upward from below the universal base 10, and the pressing seat 123 presses against the spring 13, causing the rivet 12 in the small hole 2212 to move upward. Then, the cover plate 22 is moved in the opposite direction, allowing the rivet 12 to enter the large hole 2211 from the small hole 2212. Figure 6 As shown, lift the cover plate 22, and the pull pin head 122 passes through the large hole 2211 to remove the cover plate 22 from the positioning fixture 20, making it easier to take out the processed product inside the positioning fixture 21; this eliminates the need to fix the cover plate 22 and the base 10 with screws, improving work efficiency and reducing the workload of employees.

[0024] Each of the lower mounting holes 11 in the universal base 10 is a stepped hole. The spring 13 and the pressing seat 123 are located in the outer hole of the lower mounting hole 11. The pull rod 121 of the pull stud 12 passes through the inner hole of the lower mounting hole 11. The diameter of the outer hole is larger than the diameter of the inner hole. Thus, due to the diameter difference between the outer hole and the inner hole, when the pull stud 12 is pushed upward from below the universal base 10, the spring 13 is blocked by the stepped hole, and the pressing seat 123 at the bottom of the pull stud 12 presses the spring 13.

[0025] The cover plate 22 and fixture 21 are mounted on the universal base 10 by multiple rivets 12 and springs 13. Figure 2 As shown, the pull rivet 12 includes a pull rivet rod 121, a pull rivet head 122 at the top of the pull rivet rod 121, and a pressing seat 123 at the bottom of the pull rivet rod 121. The dimensions of the pressing seat 123 and the pull rivet head 122 are larger than the dimensions of the pull rivet rod 121, which can prevent the pull rivet 12 from arbitrarily falling out of the upper mounting hole 221 and the lower mounting hole 11. For ease of installation, the pressing seat 123 and the pull rivet rod 121 are separate structures; as a preferred embodiment, such as Figure 2 As shown, the compression seat 123 is a retaining spring, and the pull rod 121 has a retaining groove 1211 in which the retaining spring is installed. In another preferred embodiment, the bottom of the pull rod 121 is provided with a screw hole, and the compression seat 123 is a screw that mates with the screw hole. The diameter of the screw nut is larger than the diameter of the pull rod 121, so that the spring 13 can be compressed when the pull rod 12 moves upward.

[0026] The cover plate 22 is provided with a mounting groove 22121 around each small hole 2212 for mounting the rivet head 122. When the rivet head 122 is stuck outside the small hole 2212, the rivet head 122 is in the mounting groove 22121, preventing the rivet head 122 from moving arbitrarily.

[0027] The orientation of the small holes 2212 in each mounting hole 221 of the cover plate 22 is consistent with the unlocking movement direction of the cover plate 22, and the orientation of the large holes 2211 in each mounting hole 221 is consistent with the clamping movement direction of the cover plate 22, thereby facilitating the locking and unlocking of the cover plate 22; Figure 4 and Figure 5 In the middle, the downward movement of the cover plate 22 is the unlocking movement direction, and the upward movement of the cover plate 22 is the clamping movement direction.

[0028] like Figure 4 and Figure 5The upper mounting holes 22 in the cover plate 22 are arranged in columns, with the upper mounting holes 22 in each column being parallel and aligned. Correspondingly, the lower mounting holes 11 in the base 10 are arranged in three columns, with the lower mounting holes 11 in each column being parallel and aligned. The through holes 211 in the positioning fixture 21 are arranged in three columns, with the through holes 211 in each column being parallel and aligned. To facilitate the removal of the cover plate 22, the last upper mounting hole 22 in each column of upper mounting holes in the cover plate 22 is a U-shaped groove. The U-shaped groove is located on the side of the cover plate 22 near the unlocking direction, and the U-shaped groove corresponds to the lower mounting hole 11 on one side of the universal base, which facilitates the installation and removal of the cover plate 22.

[0029] The positioning fixture 21 is installed on the universal base 10 by screws. When making different products, it is only necessary to replace the different special positioning fixtures 21 and cover plates 22 on the universal base 10.

[0030] The CNC machining fixture also includes a pusher plate 30. When it is necessary to install and remove the cover plate 22, the pusher plate 30 is placed under the universal base 10. The pusher plate 30 is used to push all the pull studs 12 at the bottom of the universal base 10 upward as a whole. The pressing seat 123 on the pull studs 12 presses the spring 13, so that the cover plate 22 can be released and slid. After the pusher plate 30 is removed, the spring 13 is stretched, and its elasticity pulls the cover plate 22 and the fixture 21 tight.

[0031] The clamping process of the cover plate 22 in the CNC machining fixture is as follows: 1) Select the mold 20 corresponding to the product to be processed, and install the positioning fixture 21 in the mold 20 on the universal base 10 by screws. Align the through holes 211 on the positioning fixture 21 with the lower mounting holes 11, and let the pull pins 12 pass through the through holes 211; 2) Place the pusher plate 30 under the universal base 10. The pusher plate 30 pushes all the pull pins 12 at the bottom of the universal base 10 upwards, and the compression seats 123 on the pull pins 12 compress the springs 13; 3) Place the cover plate 22 downwards, and the cover plate 22... 2) Align the large hole 2211 of each mounting hole 221 with the pull stud 12 on the base 10. The large hole 2211 passes through the pull stud head 122 of the pull stud 12, and the pull stud head 122 is above the cover plate 22; 4) Move the cover plate 22 in the clamping and positioning direction. The pull stud 12 enters the small hole 2212 from the large hole 2211. The pull stud head 122 cannot pass through the small hole 2212; 5) After removing the pusher plate 30, the pull stud 12 descends, the spring 13 stretches, and its elasticity pulls the cover plate 22 and the fixture 21 tight. The pull stud head 122 is stuck in the mounting groove 22121 of the small hole 2212.

[0032] When the product is finished and needs to be removed, the disassembly process of the cover plate 22 in the CNC machining fixture is as follows: 1) Place the pusher plate 30 under the universal base 10. The pusher plate 30 pushes all the pull studs 12 at the bottom of the universal base 10 upwards. The compression seat 123 on the pull studs 12 compresses the spring 13, and the pull stud head 122 disengages from the placement groove 22121 of the small hole 2212; 2) Move the cover plate 22 in the unlocking direction. The pull studs 12 enter the large hole 2211 from the small hole 2212. Lift the cover plate 22. The pull stud head 122 passes through the large hole 2211. Remove the cover plate 22 from the positioning fixture 20 to facilitate the removal of the processed product in the positioning fixture 21.

[0033] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A CNC machining fixture capable of rapid clamping, characterized in that, The device includes a universal base (10) and at least one set of molds (20) that mate with the universal base (10). Each set of molds (20) includes a positioning fixture (21) detachably mounted on the universal base (10) and a cover plate (22). The universal base (10) has at least two lower mounting holes (11). Each lower mounting hole (11) is fitted with a pull stud (12) for positioning the cover plate (22). A spring (13) is fitted on the pull stud (12) and is located inside the lower mounting hole (11). The pull stud (12) includes a pull stud rod (121) and a pull stud head (122) is formed at the top of the pull stud rod (121). The bottom of the rivet rod (121) is provided with a compression seat (123) for compressing the spring (13) during disassembly and assembly; the positioning fixture (21) is provided with at least two through holes (211) corresponding to the lower mounting holes (11) on the universal base (10); the cover plate (22) is provided with at least two upper mounting holes (221) corresponding to the lower mounting holes (11), each upper mounting hole (221) is divided into a large hole (2211) for the rivet head (122) to pass through during disassembly and assembly and a small hole (2212) for preventing the rivet head (122) from passing through during positioning, the large hole (2211) and the small hole (2212) are connected.

2. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The lower mounting hole (11) is a stepped hole. The spring (13) and the compression seat (123) are located in the outer hole of the lower mounting hole (11). The pull pin (12) passes through the inner hole of the lower mounting hole (11). The diameter of the outer hole is larger than the diameter of the inner hole.

3. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The rivet rod (121) has a groove (1211), and the compression seat (123) is a retaining spring that cooperates with the groove.

4. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The bottom of the rivet rod (121) is provided with a screw hole, and the compression seat (123) is a screw that mates with the screw hole.

5. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: A mounting groove (22121) for mounting the rivet head (122) is formed around the small hole (2212).

6. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The orientation of the small holes (2212) in each of the upper mounting holes (221) of the cover plate (22) is consistent with the unlocking movement direction of the cover plate (22), and the orientation of the large holes (2211) in each of the upper mounting holes (221) is consistent with the clamping movement direction of the cover plate (22).

7. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The upper mounting holes (221) in the cover plate (22) are arranged in columns, and correspondingly, the through holes (211) in the positioning fixture (21) are arranged in columns, and the lower mounting holes (11) on the universal base (10) are arranged in columns.

8. The CNC machining fixture capable of rapid clamping according to claim 7, characterized in that: The last of the mounting holes in each row of the cover plate (22) is a U-shaped groove.

9. The CNC machining fixture capable of rapid clamping according to claim 1, characterized in that: The CNC machining fixture also includes a pusher plate (30) for use when the cover plate needs to be installed and removed, the pusher plate (30) being disposed below the universal base (10).

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