Modular positioning fixture

Abstract

The application belongs to the technical field of positioning tooling, and discloses a modular positioning tooling, which comprises a base, OK clamps and a top block. The base is provided with a groove, and a plurality of positioning parts matched with the shape of a workpiece are arranged on both sides of the groove along the length direction of the groove. The plurality of OK clamps are connected in the groove, and the OK clamps are used for abutting the workpiece against the positioning parts. The top block is connected to the output end of the OK clamp in a detachable manner through a fixing piece, and the top block can move along the length direction of the fixing piece. The output end of the OK clamp is further provided with an elastic piece, one end of the elastic piece is connected with the OK clamp, the other end of the elastic piece is in abutment with the top block, and the side, away from the OK clamp, of the top block is provided with a matching part matched with the workpiece. The modular positioning tooling is modularly designed with the OK clamps and the top block, so that the top block with different matching parts can be replaced according to the shape of the workpiece. Meanwhile, the output end of the OK clamp is further provided with the elastic piece, which can play a buffering and clamping force adjusting role when fixing the workpiece, and is applicable to all the top blocks.

Description

Technical Field

[0001] This application belongs to the field of positioning tooling technology, specifically a modular positioning tooling. Background Technology

[0002] Positioning fixtures generally refer to specialized tools or equipment used in manufacturing or assembly processes to ensure the accurate positioning and fixation of workpieces or parts. Their main function is to guarantee the precision of product processing and assembly, improve production efficiency, and avoid errors.

[0003] The importance of modular tooling lies in its ability to significantly improve the flexibility and efficiency of the manufacturing process. Modular design allows tooling to be quickly assembled and adjusted using standardized units to adapt to the needs of different products or processes, thus avoiding the high costs of redesigning dedicated tooling for each new workpiece. This not only saves on design and manufacturing costs but also significantly shortens tooling development and debugging time, accelerating the introduction of new products. Furthermore, modular tooling facilitates maintenance and upgrades; components can be replaced individually without overall disassembly, extending the tooling's lifespan and improving equipment utilization.

[0004] CN219054115U discloses a multi-station quick-clamping fixture, including a base and multiple OK fixture assemblies. The base has two rows of part mounting positions for placing parts, with each row of part mounting positions corresponding to the previous one. A fixture mounting position is provided between each pair of corresponding part mounting positions. The OK fixture assembly is fixed in the fixture mounting position, thereby quickly installing and fixing two corresponding parts. Each OK fixture assembly includes a clamping wedge block and two positioning blocks. The two positioning blocks are symmetrically arranged in the fixture mounting position and correspond to the two parts respectively. The clamping wedge block is inserted between the two positioning blocks, thereby pressing the two parts together.

[0005] The above technical solution uses the OK fixture assembly to quickly install and fix parts on two rows of mounting positions. However, when fixing parts, there is no buffering effect when gradually tightening the workpiece, and the clamping force cannot be adjusted. At the same time, when the workpiece changes, the part of the OK fixture assembly that contacts the workpiece cannot be changed quickly accordingly. It can only be done by replacing another set of tooling, replacing the OK fixture assembly that is compatible with the workpiece, or replacing the two positioning blocks. Replacing another set of tooling and replacing the OK fixture assembly that is compatible with the workpiece will increase the cost; and replacing the two positioning blocks will also be relatively difficult to disassemble and assemble. Utility Model Content

[0006] The purpose of this application is to solve the above problems and provide a modular positioning fixture. This modular positioning fixture modularly designs the OK clamp and the top block, which makes it easy to replace the top block with different fitting parts according to the shape of the workpiece. At the same time, the output end of the OK clamp is also provided with an elastic element, which can play a role in buffering and adjusting the clamping force when fixing the workpiece, and is applicable to all top blocks.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A modular positioning fixture includes a base, OK clamps, and a top block. The base has mounting holes that match the external machine tool. The base also has a groove, and multiple positioning parts that match the shape of the workpiece are provided on both sides along the length of the groove. Multiple OK clamps are connected to the groove and are used to hold the workpiece against the positioning parts. The top block is detachably connected to the output end of the OK clamps by a fixing member, and the top block can move along the length of the fixing member. The output end of the OK clamps is also provided with an elastic member, one end of which is connected to the OK clamps and the other end of which abuts against the top block. The side of the top block away from the OK clamps has a fitting part that matches the workpiece.

[0009] Preferably, a baffle is provided in the groove, the baffle is arranged along the length of the groove and located in the middle of the groove, and the baffle is provided with multiple notches for installing OK clips, the vertical cross section of the notches is a structure that is wider at the top and narrower at the bottom.

[0010] Preferably, the fixing member is a fixing post, with a threaded part at one end along the length direction of the fixing post, a limiting part at the other end, a smooth part between the threaded part and the limiting part, a through hole matching the fixing post on the top block, a threaded hole matching the threaded part at the output end of the OK clamp, and the fixing post passing through the through hole and threadedly connected to the threaded hole.

[0011] Preferably, the top block has a first blind hole on the side near the OK clamp, the length of the first blind hole extends along the width direction of the top block, and one end of the elastic member is located in the first blind hole and abuts against the top block.

[0012] Preferably, the output end of the OK clip is provided with a second blind hole, which is arranged opposite to the first blind hole, and one end of the elastic element is fixedly connected in the second blind hole.

[0013] Preferably, the elastic element is a spring.

[0014] Preferably, the top block has an L-shaped structure, including a vertical part and a horizontal part. The horizontal part fits into the bottom of the groove, and the vertical part is connected to the output end of the OK clip through a fastener. The fitting part is located on the side of the horizontal part away from the vertical part.

[0015] Preferably, the base includes a base and a support, with mounting holes located on the base, a positioning pin for mounting the support on the base, and a clamping element for pressing the support on the base.

[0016] Preferably, the clamping element includes a pressure strip, the bottom of which is provided with a connecting piece and an elastic block adjacent to the connecting piece. The connecting piece is connected to the base by an external bolt, and the elastic block abuts against the support seat.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] This modular positioning fixture features a modular design for the OK clamp and top block, allowing for easy replacement of top blocks with different mating parts according to the shape of the workpiece. Additionally, the output end of the OK clamp is equipped with an elastic element, which can buffer and adjust the clamping force when fixing the workpiece, and is applicable to all top blocks. Attached Figure Description

[0019] Figure 1 This is the front view of the modular positioning tooling of Example 1;

[0020] Figure 2 This is a side view of the modular positioning fixture of Example 1;

[0021] Figure 3 This is a top view of the modular positioning tooling of Example 1;

[0022] Figure 4 This is a perspective view of the base of the modular positioning fixture in Example 1;

[0023] Figure 5 This is a perspective view of the support base of the modular positioning tooling in Example 1;

[0024] Figure 6 This is a schematic diagram showing the connection between the OK clamp and the top block of the modular positioning fixture in Example 1;

[0025] Figure 7 This is a schematic diagram of the modular positioning fixture with workpiece in Example 1;

[0026] Figure 8 This is a schematic diagram of the modular positioning fixture with workpiece in Example 2;

[0027] The labels for each item are as follows:

[0028] Base 1; OK clip 2; top block 3; fastener 4; elastic element 5; base 11; support seat 12; threaded hole 21; second blind hole 22; horizontal part 31; vertical part 32; through hole 33; first blind hole 34; limiting part 41; threaded part 42; smooth part 43; mounting hole 111; clamping element 112; positioning pin 113; groove 121; positioning part 122; stop bar 123; notch 124; handle 125; fitting part 311; pressure strip 1121; connecting piece 1122; elastic block 1123. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Example 1

[0031] Before describing this embodiment, the shape of the workpiece should be specifically explained. In this embodiment, the fixed workpiece is a sheet-like body with a trapezoidal horizontal cross-section. Rounded corners are provided between the long side and the inclined side of the workpiece, making the long side of the workpiece arc-shaped.

[0032] Therefore, in this embodiment, the positioning part 122 is also trapezoidal in shape, but does not have a long side, and the fitting part 311 is an arc-shaped part that matches the long side of the workpiece.

[0033] refer to Figures 1-7 A modular positioning fixture includes a base 1, an OK clamp 2, and a top block 3. The base 1 has mounting holes 111 that match the external machine tool. The base 1 has a groove 121. Multiple positioning parts 122 that match the shape of the workpiece are provided on both sides along the length direction of the groove 121. Multiple OK clamps 2 are connected in the groove 121. The OK clamps 2 are used to press the workpiece against the positioning parts 122. The top block 3 is detachably connected to the output end of the OK clamp 2 by a fixing member 4. The top block 3 can move along the length direction of the fixing member 4. The output end of the OK clamp 2 is also provided with an elastic member 5. One end of the elastic member 5 is connected to the OK clamp 2, and the other end abuts against the top block 3. The side of the top block 3 away from the OK clamp 2 is provided with a fitting part 311 that matches the workpiece.

[0034] It should also be noted that the base 1 is provided with a mounting hole 111 that matches the machine tool of the peripheral device. The mounting hole 111 is used to connect to the T-slot on the machine tool worktable. Specifically, the T-slot on the machine tool worktable is existing technology. You can refer to the technical solution disclosed in Chinese Patent CN111203734A, which mentions the specific structure of the worktable and the T-slot. Therefore, the mounting hole 111 and the installation method of the machine tool of the peripheral device will not be described in detail in this embodiment.

[0035] In the initial state, the top block 3 will be pushed out by the elastic element 5. Therefore, when placing the workpiece, the operator needs to manually push the top block 3 to move it away from the positioning part 122 so that the distance between the top block 3 and the positioning part 122 increases. The operator places the workpiece in the positioning part 122 and then releases the top block 3. The contact part 311 of the top block 3 will contact the workpiece and play a pre-fixing role. The operator then applies a pushing force through the OK clamp 2 to compress the spring, thereby pushing the top block 3 to press the workpiece against the positioning part 122.

[0036] Among them, the OK clip 2 is existing technology. Regarding the thrust applied by the OK clip 2, please refer to the technical solution disclosed in Chinese Patent CN217914842U.

[0037] In this embodiment, a baffle 123 is provided in the groove 121. The baffle 123 is arranged along the length of the groove 121 and is located in the middle of the groove 121. The baffle 123 is provided with a plurality of notches 124 for installing the OK clip 2. The vertical cross section of the notch 124 is a structure that is wider at the top and narrower at the bottom.

[0038] Specifically, the main function of the baffle 123 in the groove 121 is to restrict the movement of the OK clip 2. This is mainly achieved by creating a notch 124 in the baffle 123, and the cross-section of the notch 124 is wider at the top and narrower at the bottom. Preferably, the cross-section of the wider part at the top is trapezoidal. Therefore, the wider part at the top can play a guiding role when installing the OK clip 2, while the baffle 123 parts located on both sides of the notch 124 can fit against the OK clip 2 and play a role in stabilizing the OK clip 2.

[0039] In this embodiment, the fixing member 4 is a fixing post. One end of the fixing post is provided with a threaded part 42 and the other end is provided with a limiting part 41. A smooth part 43 is provided between the threaded part 42 and the limiting part 41. The top block 3 is provided with a through hole 33 that matches the fixing post. The output end of the OK clip 2 is provided with a threaded hole 21 that matches the threaded part 42. The fixing post passes through the through hole 33 and is threadedly connected to the threaded hole 21.

[0040] In actual use, the threaded part 42 on the fixing post plays a fixing role. After the fixing post passes through the top block 3, it is threadedly connected to the threaded hole 21 on the OK clamp 2. With the limiting part 41 on the fixing post, the top block 3 can slide along the smooth part 43 on the fixing post. Preferably, there are two fixing posts, that is, there are also two threaded holes 21. The stability of the top block 3 is ensured by fixing a straight line at two points.

[0041] In this embodiment, the top block 3 has a first blind hole 34 on the side near the OK clip 2. The length of the first blind hole 34 extends along the width direction of the top block 3. One end of the elastic member 5 is located in the first blind hole 34 and abuts against the top block 3. Further, the output end of the OK clip 2 has a second blind hole 22. The second blind hole 22 is arranged opposite to the first blind hole 34, and one end of the elastic member 5 is fixedly connected in the second blind hole 22.

[0042] In this embodiment, the elastic element 5 is a spring.

[0043] In practical use, one end of the spring can be fixed in the second blind hole 22 by welding, while the other end of the spring extends into the first blind hole 34 and abuts against the top block 3. This ensures that the spring's movement is limited to compression, restricting its radial movement. During replacement, the top block 3 can be separated from the OK clip 2 by removing the fixing post. The new top block 3 is connected to the OK clip 2 in the same way via the fixing post, ensuring that the other end of the spring extends into the first blind hole 34 of the top block 3. This provides a buffering effect for various top blocks 3. This method enables modular replacement of the top block 3 and OK clip 2.

[0044] Preferably, the top block 3 has an L-shaped structure, and the top block 3 includes a vertical part 32 and a horizontal part 31. The horizontal part 31 fits into the bottom of the groove 121, and the vertical part 32 is connected to the output end of the OK clip 2 through the fixing member 4. The fitting part 311 is located on the side of the horizontal part 31 away from the vertical part 32.

[0045] Specifically, the top block 3 adopts an L-shaped structure, which can divide the top block 3 into two parts for different purposes. The vertical part 32 mainly plays a fixing role and is connected to the OK clip 2 through the fastener 4. The horizontal part 31 plays a role in pressing against the workpiece. Therefore, the fitting part 311 is set on the horizontal part 31. Moreover, this method also facilitates the installation and disassembly of the top block 3.

[0046] In this embodiment, the base 1 includes a base 11 and a support 12. The mounting hole 111 is located on the base 11. The base 11 is also provided with a positioning pin 113 for mounting the support 12. The base 11 is also provided with a clamping member 112 for pressing the support 12.

[0047] In use, the support base 12 can be installed on the machine tool of the peripheral device via the base 11. Therefore, the support base 12 can be directly replaced for changes in parts. Implicitly, after the base 11 and the support base 12 are positioned by the positioning pin 113, the support base 12 can also be locked onto the base 11 by bolts. After the support base 12 and the base 11 are installed, the support base 12 is pressed onto the base 11 by the clamping member 112 to ensure the stability of the support base 12.

[0048] In this embodiment, the support base 12 is also provided with a handle 125 to facilitate the installation and disassembly of the support base 12.

[0049] In this embodiment, the clamping member 112 includes a clamping strip 1121. The bottom of the clamping strip 1121 is provided with a connecting piece 1122 and an elastic block 1123 adjacent to the connecting piece 1122. The connecting piece 1122 is connected to the base 11 by an external bolt. At this time, the elastic block 1123 abuts against the support base 12.

[0050] It should be noted that when installing the base 11 and the support 12, the clamping part 112 and the base 11 are in a separate state. That is, after the support 12 is installed, the bolt is passed through the connecting piece 1122 to lock the connecting piece 1122 onto the base 11, so that the elastic block 1123 on the pressure strip 1121 presses the support 12.

[0051] Example 2

[0052] refer to Figure 8 The difference between Embodiment 2 and Embodiment 1 is that the workpiece fixed in Embodiment 2 is a sheet-like body with a trapezoidal horizontal cross-section and rounded corners between the long side and the inclined side of the workpiece. In Embodiment 2, the fitting part 311 on the horizontal part 31 of the top block 3 is a plane.

[0053] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements or modifications can be made without departing from the principle of this application, and these improvements or modifications should also be considered within the scope of protection of this application.

Claims

1. A modular positioning fixture, comprising a base, OK clamps, and a top block, wherein the base has mounting holes matching an external machine tool, the base has a groove, and multiple positioning portions matching the shape of a workpiece are provided on both sides along the length direction of the groove, and the multiple OK clamps are all connected in the groove, the OK clamps being used to press the workpiece against the positioning portions, characterized in that, The top block is detachably connected to the output end of the OK clamp via a fixing member, and the top block can move along the length direction of the fixing member. The output end of the OK clamp is also provided with an elastic member, one end of which is connected to the OK clamp and the other end abuts against the top block. The top block has a fitting part that matches the workpiece on the side away from the OK clamp.

2. The modular positioning fixture according to claim 1, characterized in that, The groove is provided with a baffle bar, which is arranged along the length of the groove and located in the middle of the groove. The baffle bar is provided with multiple notches for installing the OK clip, and the vertical cross-section of the notch is wider at the top and narrower at the bottom.

3. The modular positioning fixture according to claim 1, characterized in that, The fixing member is a fixing post, with a threaded part at one end along the length direction of the fixing post and a limiting part at the other end. A smooth part is provided between the threaded part and the limiting part. The top block is provided with a through hole that matches the fixing post. The output end of the OK clamp is provided with a threaded hole that matches the threaded part. The fixing post passes through the through hole and is threadedly connected to the threaded hole.

4. The modular positioning fixture according to claim 1, characterized in that, The top block has a first blind hole on the side near the OK clip. The length of the first blind hole extends along the width direction of the top block. One end of the elastic member is located in the first blind hole and abuts against the top block.

5. The modular positioning fixture according to claim 4, characterized in that, The output end of the OK clip is provided with a second blind hole, which is arranged opposite to the first blind hole, and one end of the elastic element is fixedly connected in the second blind hole.

6. The modular positioning fixture according to claim 1, characterized in that, The elastic element is a spring.

7. The modular positioning fixture according to claim 1, characterized in that, The top block has an L-shaped structure, including a vertical part and a horizontal part. The horizontal part fits into the bottom of the groove, and the vertical part is connected to the output end of the OK clip through the fixing member. The fitting part is located on the side of the horizontal part away from the vertical part.

8. The modular positioning fixture according to claim 1, characterized in that, The base includes a base and a support base. The mounting hole is located on the base. The base is also provided with a positioning pin for mounting the support base and a clamping member for pressing the support base.

9. The modular positioning fixture according to claim 8, characterized in that, The clamping component includes a pressure strip, the bottom of which is provided with a connecting piece and an elastic block adjacent to the connecting piece. The connecting piece is connected to the base by an external bolt, and the elastic block abuts against the support seat.

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