Positioning tool for processing a front plate of a shooting table

Abstract

The utility model relates to workpiece clamping auxiliary device technical field discloses a positioning tool for shooting platform front plate machining, including tool body, tool body includes a pair of parallel distribution and fixed on the support part of machine tool workstation, the pivot joint position of shooting platform front plate pivot joint cooperation is set up in one support part and the adjusting mechanism of driving shooting platform front plate horizontal reciprocating rotation to with machine tool datum axis parallel is set up in another support part, the scheme has constructed a single point pivot joint as the rotation center, through horizontal rotation shooting platform front plate makes its datum side surface tend to with machine tool datum axis parallel positioning mode, after adopting this mode, only needs to process a pin hole when shooting platform front plate front processing and ensures that the basic size of pin hole is accurate, can realize pivot joint, avoids the phenomenon that cannot normally clamp because of the position degree deviation of two pin holes.

Description

Technical Field

[0001] This utility model relates to the technical field of workpiece clamping auxiliary devices, and in particular to a positioning fixture for machining the front plate of a shooting table. Background Technology

[0002] The existing injection molding machine front plate structure can refer to the injection molding machine front plate disclosed in Chinese Patent No. CN219883134U, which includes a plate body, a cavity on the plate body, and guide pin holes and injection holes opened on the cavity. The injection plate is usually machined by a machining center and is usually clamped by a one-sided two-pin positioning method. That is, the tooling has a precision plane that contacts the bottom surface of the injection plate, and a pair of pins are protruding on the plane. The injection plate has pin holes for the pins to be inserted. After the injection plate is inserted with the pins and contacts the precision plane, the clamping device presses the injection plate onto the tooling.

[0003] The above-mentioned method is a common positioning method in machining. However, the pin holes on the front plate of the injection table need to be machined in the first process, and the dimensions of the two pin holes and their relative positions need to be highly consistent in order to successfully align with the pins in subsequent clamping. If there is a positional deviation between the pin holes and it flows into subsequent processes, the injection table front plate will not be able to be clamped properly, and the injection table front plate will have to be reworked. Therefore, the existing injection table front plate tooling has excessively high requirements for the machining accuracy of the pin holes on the injection table front plate, poor fault tolerance, resulting in a high scrap rate and frequent rework. Utility Model Content

[0004] In view of the shortcomings of existing front plate tooling, which has excessively high requirements for the machining accuracy of the pin holes on the front plate of the injection stage, poor fault tolerance, resulting in high scrap rate and frequent rework, the purpose of this utility model is to provide a positioning tooling for machining the front plate of the injection stage.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: A positioning fixture for machining the front plate of a firing table includes a fixture body, which includes a pair of parallel supporting components fixed to the machine tool worktable, a pivot position provided on one of the supporting components for pivotally engaging the front plate of the firing table, and an adjustment mechanism provided on the other supporting component for driving the front plate of the firing table to rotate horizontally reciprocally until it is parallel to the reference axis of the machine tool.

[0006] By adopting the above scheme, this scheme constructs a positioning method with a single-point pivot as the rotation center, and the reference side of the front plate of the injection stage is made to be parallel to the reference axis of the machine tool by horizontally rotating the front plate of the injection stage. With this method, when the front plate of the injection stage is pre-processed, only one pin hole needs to be machined and the basic size of the pin hole needs to be ensured to achieve the pivot connection. This avoids the phenomenon that the two pin holes cannot be properly clamped due to positional deviation. This not only significantly improves the fault tolerance and adaptability of the tooling, but also fundamentally reduces the rework of the workpiece caused by the machining error of the reference hole. Thus, while ensuring the final machining accuracy, it improves production efficiency and product yield.

[0007] Preferably, the adjustment mechanism includes a first adjustment member that is horizontally arranged and connected to the front plate of the firing table, and a second adjustment member that is sleeved on the first adjustment member and threadedly connected to the tooling body. The end of the first adjustment member away from the front plate of the firing table forms a limiting end that restricts the second adjustment member from disengaging. An adjustment gap is left between the limiting end and the front plate of the firing table for the second adjustment member to move laterally when rotating relative to the tooling body. The front plate of the firing table moves forward or away from the front plate of the firing table as the second adjustment member moves towards the front plate of the firing table to achieve forward and reverse rotation adjustment. A clearance is left on the second adjustment member to avoid the first adjustment member moving around as the front plate of the firing table rotates.

[0008] Preferably, the pivot position includes a positioning pin protruding from the support component, which forms a pivot engagement with the front plate of the firing table after being inserted into it, and the front plate of the firing table has a pin hole for the positioning pin to be inserted.

[0009] With the above scheme, when the second adjusting member is continuously rotated towards the front plate of the firing table, the second adjusting member will abut against and push the front plate of the firing table to rotate horizontally to one side. When the second adjusting member is continuously rotated away from the front plate of the firing table, the second adjusting member will abut against the limit end and pull the front plate of the firing table to rotate horizontally in the opposite direction through the first adjusting member. Therefore, when the operator uses the adjusting mechanism in this scheme, he only needs to operate on one side of the front plate of the firing table. There is no need to walk back and forth on the machine tool's worktable to switch the adjustment direction. Since there will be iron filings, cutting fluid and other substances left on the machine tool's worktable, frequent walking can easily cause slipping and falling injuries. Therefore, adopting this structure can reduce the incidence of safety accidents. In this design, the rotation of the front plate of the firing table will cause the first adjusting component to rotate as well, resulting in a certain deflection of the first adjusting component. The second adjusting component can avoid the effects of the deflection by utilizing the clearance. Even after the first adjusting component deflects, the second adjusting component can still be rotated without affecting the adjustment of the front plate of the firing table. The clearance design ensures that the installation position of the first adjusting component can be installed even if there is a certain deviation between the installation position and the position of the pin hole. This reduces the precision requirements of the pre-processing of the front plate of the firing table and prevents the adjustment mechanism from falling into the high-precision fit of two pin positioning again.

[0010] Preferably, one end of the support component is provided with a mounting block, the mounting block having a threaded through hole for the second adjusting member to be screwed in, and the second adjusting member having a central hole for the first adjusting member to pass through, the diameter of which is larger than that of the first adjusting member.

[0011] Using the above solution, the gap between the inner wall of the central hole and the outer wall of the first adjusting member is the clearance mentioned in the previous solution.

[0012] Preferably, the mounting block is connected to the support component by a pair of bolts. The mounting block has a slotted hole through which the two bolts pass. When the bolts are not tightened, the mounting block can be horizontally guided to move along the side of the support component.

[0013] By adopting the above scheme, the adaptability of the adjustment mechanism has been optimized. When there is a large deviation in the installation position of the pin hole or the first adjustment component, the second adjustment component can be screwed into the mounting block first, then the bolt can be loosened, and then the mounting block can be moved so that the center hole of the second adjustment component is aligned with the installation position of the first adjustment component, and then the bolt can be tightened. This design can further reduce the accuracy requirements during the pre-processing of the front plate of the firing table.

[0014] Preferably, the first adjusting component is a screw, and a threaded hole for screwing the first adjusting component is provided on the side wall of the front plate of the firing table.

[0015] Using the above solution, the front plate of the firing table is a large part, and its transportation and clamping steps must be completed with the help of a crane (bridge crane). Therefore, two pairs of lifting eye holes will be opened on both sides of the front plate of the firing table. After the lifting eye is removed, the lifting eye holes can be used as threaded holes for the installation of the first adjustment component. Therefore, the threaded holes in this solution do not need to be processed additionally. It is only necessary to select a screw that matches the lifting eye hole.

[0016] Preferably, the support component is provided with a connection mechanism that is fixedly connected to the machine tool table.

[0017] Preferably, the connecting mechanism includes a T-shaped screw that slides and engages with a guide groove on the machine tool worktable and is partially inserted into a support component. The support component has a clearance hole for the T-shaped screw to pass through and a countersunk groove coaxially arranged with the clearance hole. A nut that is screwed into the T-shaped screw is rotatably disposed in the countersunk groove, and a retaining spring is provided on the inner wall of the countersunk groove to prevent the nut from falling off.

[0018] Using the above solution, the operator can adjust the position of the support components and quickly lock them according to the different sizes of the front plate of the firing table. This design can increase the compatibility between the positioning fixture and different models of the front plate of the firing table. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a positioning fixture for machining the front plate of a shooting platform, as shown in this embodiment, mounted on a machine tool. Figure 2 This is a schematic diagram of the disassembled state of a positioning fixture for machining the front plate of a shooting platform according to this embodiment; Figure 3 This is a top view of a positioning fixture for machining the front plate of a shooting platform, as described in this embodiment, mounted on a machine tool. Figure 4 yes Figure 3 A sectional view of AA in the middle; Figure 5 yes Figure 4 A magnified view of a portion of A1; Figure 6 yes Figure 3 The cross-sectional view of BB in the middle.

[0020] The parts referred to by the numbers in the above attached figures are as follows: 1. Front plate of the injection table; 2. Machine tool worktable; 201. Clamping device; 3. Support component; 301. Weight reduction groove; 4. First adjusting component; 5. Second adjusting component; 6. Positioning pin; 7. Pin hole; 8. Mating groove; 9. Mounting block; 10. Threaded through hole; 11. Center hole; 12. Bolt; 13. Mounting hole; 14. Waist-shaped hole; 15. Threaded hole; 16. T-screw; 17. Clearance hole; 18. Countersunk groove; 19. Nut; 20. Snap ring. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Example A positioning fixture for machining the front plate of a firing table, according to Figure 1 , 2 As shown, it includes a pair of parallel support components 3 distributed on the machine tool worktable 2. Several weight-reducing grooves 301 are formed on the outer wall of the support component 3. The front plate 1 of the injection stage is placed on the support component 3. One of the support components 3 has a mating groove 8, and a locating pin 6 is interference-fitted into the mating groove 8. According to... Figure 6 As shown, a pin hole 7 is provided on the bottom surface of the front plate 1 of the firing table. In this embodiment, the depth of the pin hole 7 is greater than the height of the part of the positioning pin 6 protruding from the support component. This design ensures that the support component 3 fits against the bottom surface of the front plate 1 of the firing table after the positioning pin 6 is fully inserted into the pin hole 7. After the positioning pin 6 is inserted into the pin hole 7, the front plate 1 of the firing table and the support component 3 achieve pivotal engagement.

[0023] Another supporting component 3 is equipped with an adjustment mechanism that drives the front plate 1 of the firing platform to rotate horizontally and reciprocally, according to... Figure 2 , 4As shown in Figure 5, the adjustment mechanism includes a horizontally arranged first adjustment member 4. A threaded hole 15 for screwing the first adjustment member 4 is provided on the side wall of the front plate 1 of the firing table. A second adjustment member 5 is sleeved on the first adjustment member 4. A mounting block 9 is provided at one end of the support member 3. A threaded through hole 10 for screwing the second adjustment member 5 is provided on the mounting block 9. In this embodiment, the first adjustment member 4 is a screw rod. The large end of the first adjustment member 4 forms a limiting end that restricts the second adjustment member 5 from disengaging. An adjustment distance is left between the limiting end and the front plate 1 of the firing table for the second adjustment member 5 to move laterally when rotating relative to the tool body. When the second adjustment member 5 rotates continuously towards the front plate 1 of the firing table, the second adjustment member 5 will abut against and push the front plate 1 of the firing table to rotate horizontally counterclockwise. When the second adjustment member 5 rotates continuously away from the front plate 1 of the firing table, the second adjustment member 5 will abut against the limiting end and pull the front plate 1 of the firing table to rotate horizontally clockwise through the first adjustment member 4.

[0024] according to Figure 2 , 5 As shown, the second adjusting member 5 has a central hole 11 with a diameter larger than that of the first adjusting member 4. The first adjusting member 4 passes through the central hole 11. When the front plate 1 of the firing table rotates, it will rotate together with the first adjusting member 4, causing the first adjusting member 4 to deflect to a certain extent. The gap between the inner wall of the central hole 11 and the outer wall of the first adjusting member 4 can avoid the influence of the deflection. After the first adjusting member 4 deflects, the second adjusting member 5 can still be rotated to adjust the front plate 1 of the firing table.

[0025] according to Figure 2 As shown, the mounting block 9 is connected to the support component 3 by a pair of bolts 12. The support component 3 has mounting holes 13 for bolts 12 to be screwed in, and the mounting block 9 has waist-shaped holes 14 for two bolts 12 to pass through. When the bolts 12 are not tightened, the mounting block 9 can move horizontally along the side of the support component 3.

[0026] The support component 3 is equipped with a connection mechanism that is fixedly connected to the machine tool worktable 2, according to... Figure 6 As shown, the connecting mechanism includes a T-shaped screw 16 that slides and engages with the guide groove on the machine tool worktable 2 and is partially inserted into the support component 3. The support component 3 has a clearance hole 17 for the T-shaped screw 16 to pass through and a countersunk groove 18 coaxially arranged with the clearance hole 17. A nut 19 that is screwed into the T-shaped screw 16 is rotatably arranged in the countersunk groove 18. A retaining spring 20 is provided on the inner wall of the countersunk groove 18 to prevent the nut 19 from falling off.

[0027] Combining the above structure and Figures 1-6 The positioning adjustment steps of a positioning fixture for machining the front plate of a shooting platform in this embodiment are described below: First, hoist the front plate 1 of the firing table to the top of the machine tool worktable 2, align it with the support component 3, and slowly lower it to a height that leaves a certain gap with the support component 3. Then, align the pin hole 7 on the front plate 1 of the firing table with the positioning pin 6 and lower it to make the front plate 1 of the firing table and the support component 3 pivotally connected. The second step is to screw the second adjusting member 5 into the mounting block 9, then loosen the bolt 12, and adjust the center hole 11 and the threaded hole 15 to be roughly aligned by moving the mounting block 9 to ensure that the clearance between the first adjusting member 4 and the center hole 11 is relatively uniform. Then, insert the first adjusting member 4 into the center hole 11 and connect it to the threaded hole 15. The third step is to magnetically fix the dial indicator to the spindle of the machine tool and move the spindle close to one side of the front plate 1 of the injection table so that the dial indicator head contacts the front plate 1 of the injection table and preloads a certain stroke. Then, move the spindle along the side of the front plate 1 of the injection table. By observing the swing of the dial indicator pointer, the deviation direction of the side of the front plate 1 of the injection table relative to the reference axis of the machine tool can be determined. Then, turn the second adjusting part 5 in the corresponding direction to drive the front plate 1 of the injection table to rotate in a direction parallel to the reference axis of the machine tool. Then move the spindle again and repeat the above actions until the swing range of the dial indicator pointer is within the processing requirements, thus completing the positioning of the front plate 1 of the injection table. Fourth step, lift the machine tool spindle away from the front plate 1 of the injection table, and then use the clamping device 201 to fix the front plate 1 of the injection table onto the machine tool worktable 2. Then remove the dial indicator, remove the first adjusting part 4 and the second adjusting part 5, and you can start processing.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for machining the front plate of a firing table, comprising a fixture body, characterized in that: The tooling body includes a pair of parallel supporting components (3) fixed on the machine tool worktable (2), a pivot position on one of the supporting components (3) for pivotally engaging with the front plate (1) of the injection stage, and an adjustment mechanism on the other supporting component (3) for driving the front plate (1) of the injection stage to rotate horizontally back and forth to be parallel to the reference axis of the machine tool.

2. The positioning fixture for machining the front plate of a firing table according to claim 1, characterized in that: The adjustment mechanism includes a first adjustment member (4) that is horizontally set and connected to the front plate (1) of the firing table, and a second adjustment member (5) that is sleeved on the first adjustment member (4) and threadedly connected to the tooling body. The end of the first adjustment member (4) away from the front plate (1) forms a limiting end that restricts the second adjustment member (5) from disengaging. An adjustment gap is left between the limiting end and the front plate (1) of the firing table for the second adjustment member (5) to move laterally when rotating relative to the tooling body. The front plate (1) of the firing table is adjusted to rotate in both directions as the second adjustment member (5) moves forward or away from the front plate (1). The second adjustment member (5) has a clearance for avoiding the first adjustment member (4) from moving as the front plate (1) of the firing table rotates.

3. The positioning fixture for machining the front plate of a firing table according to claim 2, characterized in that: The pivot position includes a positioning pin (6) protruding on the support component (3) and pivotally engaged with the front plate (1) of the firing platform. The front plate (1) of the firing platform has a pin hole (7) for the positioning pin (6) to be inserted.

4. The positioning fixture for machining the front plate of a firing table according to claim 2, characterized in that: One end of the support component (3) is provided with a mounting block (9), and the mounting block (9) is provided with a threaded through hole (10) for the second adjusting component (5) to be screwed in. The second adjusting component (5) is provided with a center hole (11) for the first adjusting component (4) to pass through, and the diameter is larger than that of the first adjusting component (4).

5. A positioning fixture for machining the front plate of a firing table according to claim 4, characterized in that: The mounting block (9) is connected to the support component (3) by a pair of bolts (12). The mounting block (9) has a waist-shaped hole (14) through which the two bolts (12) pass. When the bolts (12) are not tightened, the mounting block (9) can move horizontally along the side of the support component (3).

6. A positioning fixture for machining the front plate of a firing table according to claim 2, characterized in that: The first adjusting component (4) is a screw, and a threaded hole (15) for screwing the first adjusting component (4) is provided on the side wall of the front plate (1) of the firing platform.

7. A positioning fixture for machining the front plate of a firing table according to claim 1, characterized in that: The support component (3) is provided with a connection mechanism that is fixedly connected to the machine tool worktable (2).

8. A positioning fixture for machining the front plate of a firing table according to claim 7, characterized in that: The connecting mechanism includes a T-screw (16) that slides and engages with the guide groove on the machine tool table (2) and is partially inserted into the support component (3). The support component (3) has a clearance hole (17) for the T-screw (16) to pass through and a countersunk groove (18) coaxially arranged with the clearance hole (17). A nut (19) that is screwed into the T-screw (16) is rotatably arranged in the countersunk groove (18). A retaining ring (20) is provided on the inner wall of the countersunk groove (18) to prevent the nut (19) from falling off.

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