Pneumatic correction tool

Abstract

The utility model relates to the technical field of part correction, in particular to a pneumatic correction tool which comprises a downward pressing mechanism and a bottom supporting assembly, the downward pressing mechanism comprises a pressing plate which is pneumatically driven to ascend and descend and a correction pressing rod which is installed on the pressing plate and is adjustable in height, and the bottom supporting assembly comprises a positioning pin, an equal-height block and a bottom supporting column. The positioning pins are used for positioning workpieces, the equal-height blocks are fixedly installed, the height of the bottom supporting columns can be adjusted, and one bottom supporting column is correspondingly arranged below each shape correcting pressing rod. The scheme is used for solving the problem that a correction tool in the prior art is tedious in thickness standard block adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field of component orthopedics, and particularly relates to a pneumatic correction tooling. Background Art

[0002] Metal die casting is a process method in which molten metal is filled into the die cavity of a die casting mold at high speed under high pressure and crystallized and solidified under pressure to obtain die castings.

[0003] During the cooling process of the casting, it will go through three interrelated shrinkage stages: liquid shrinkage stage, solidification shrinkage stage, and solid shrinkage stage. Among them, the solid shrinkage stage has the greatest impact on the shape and dimensional accuracy of the casting, and is also the main reason for the deformation of the casting. During the cooling process of the casting, affected by factors such as metal composition, temperature change, and phase change, as well as in the processes of ejection and slag inclusion removal, etc., the casting will produce warping deformation, making its flatness exceed the design requirements.

[0004] To ensure the product quality of the castings for subsequent use, it is necessary to correct the deformation of the castings. The traditional correction method is to manually place the castings on a flatness gauge, detect with a feeler gauge, and for the positions that do not pass the detection, manually use a correction hammer to correct. Using this method can effectively solve the problem of casting deformation, but the efficiency is low and it will increase the labor intensity and labor cost of workers.

[0005] Currently, in the prior art, there is a tooling for trimming and correcting die castings with the patent publication number of CN219484179U. The pressing mechanism and correction assembly provided on this tooling are used to orthopedize die cast products. During orthopedization, the casting is placed on the correction assembly, and the pressing mechanism is pressed down to achieve the orthopedization of the casting. However, when orthopedizing with the currently disclosed patent technology, it is necessary to adjust the number of thickness standard blocks below the correction insert according to the deformation amount of the casting to match the reverse deformation amount. This adjustment method is relatively complex, especially in the case of multiple deformation positions, or in the case of large differences in deformation amounts, such as long and narrow thin castings, or castings with special-shaped workpieces. It is necessary to increase or decrease different numbers of thickness standard blocks for each deformation position, making the operation rather cumbersome; in addition, since the thickness standard blocks are usually of a certain specification, during deformation compensation, only integer multiples of the thickness standard blocks can be used for reverse deformation adjustment, but this integer multiple of the thickness standard blocks may not exactly meet the requirements of the reverse deformation amount, resulting in a deviation between the size after orthopedization and the design. Summary of the Utility Model

[0006] The utility model aims to provide a pneumatic correction tooling to solve the problem of cumbersome adjustment of thickness standard blocks in the existing correction tooling.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A pneumatic straightening tooling, comprising a downward pressing mechanism and a bottom supporting assembly. The downward pressing mechanism includes a pressing plate that moves up and down pneumatically, and a height-adjustable straightening pressure rod installed on the pressing plate. The bottom supporting assembly includes a positioning pin, an equal-height block, and a bottom supporting column. The positioning pin is used to position the workpiece. The equal-height block is fixedly installed, and the bottom supporting column can be adjusted in height. There is a bottom supporting column corresponding to each straightening pressure rod.

[0009] The principle and advantages of this solution are as follows: By setting both the bottom supporting column and the straightening pressure rod to be height-adjustable, it is not necessary to adjust the number of thickness standard blocks as in the prior art, avoiding the problem of cumbersome adjustment. In addition, since both the bottom supporting column and the straightening pressure rod can be adjusted in height, the adjustment range can be wider, and the deformation amount can be compensated equally, thereby ensuring the dimensional accuracy after straightening.

[0010] In addition, through the setting of the height-adjustable straightening pressure rod and the bottom supporting column in this solution, both upward warping deformation and downward concave deformation can be corrected, improving the practicability compared with the prior art.

[0011] In addition, through the setting of the equal-height block, the height-adjustable bottom supporting column, and the height-adjustable straightening pressure rod in this solution, for the same straightening tooling, by adjusting the heights of the bottom supporting column and the straightening pressure rod, the straightening requirements of different products can be met, without the need to replace specific straightening templates that are concave-convexly matched with the product structure as in the prior art, thus greatly reducing the cost.

[0012] Preferably, as an improvement, an equal-height block pressure rod is further installed on the pressing plate of the downward pressing mechanism. The equal-height block pressure rod is slidably connected to the pressing plate, and an elastic member is provided between the equal-height block pressure rod and the pressing plate. Before straightening, the distance between the free end of the equal-height block pressure rod and the surface of the workpiece directly below is greater than the distance between the straightening pressure rod and the surface of the workpiece directly below, so that during the downward pressing process, the equal-height block pressure rod touches the surface of the workpiece earlier than other straightening pressure rods, thereby pre-compressing the workpiece. After the equal-height block pressure rod gradually approaches the equal-height block, the workpiece is slowly compressed.

[0013] Preferably, as an improvement, the number of the equal-height blocks is 3, and the connection lines of the three equal-height blocks form a triangle to form a stable support for the workpiece.

[0014] Preferably, as an improvement, the positioning pin is a floating positioning pin. The floating positioning pin includes a fixedly installed bushing, a pin body that slides on the bushing, and a spring sleeved on the pin body.

[0015] Preferably, as an improvement, both the orthopedic pressing rod and the bottom support column are provided with threaded sections for adjusting the height by threading. This solution has a simple structure and is easy to achieve height adjustment.

[0016] Preferably, as an improvement, the length of the workpiece to be orthopedically treated >> the width of the workpiece > the thickness of the workpiece. The number of the pressing mechanisms is three, and the three pressing mechanisms are arranged along the length direction of the workpiece. The equal-height block is arranged below the middle pressing mechanism. This solution realizes the zonal pressing of the workpiece through three pressing mechanisms. During specific use, the middle pressing mechanism can be lowered first for positioning to ensure the accuracy of the workpiece position, and then the pressing mechanisms on both sides can be lowered to realize the correction of multiple positions of the workpiece, namely the left, middle, and right positions. In addition, the zonal pressing from left to right can also select a suitable driving source and apply the required pressure according to the differences in deformation on both sides and in the middle, thereby further improving the practicality.

[0017] Preferably, as an improvement, the pressing mechanism is installed on a fixedly arranged top plate. A pull rod is connected to the top plate. The pull rod penetrates downward through the pressing plate, and a limiting member is fixed at the bottom of the pull rod passing through the pressing plate. The pull rod in this solution can not only form a guide for the movement of the pressing plate close to the workpiece but also use the limiting member at the bottom end of the pull rod to form a limit on the downward pressing position of the pressing plate, avoiding situations such as the pressing plate falling off, excessive stroke, and incorrect installation direction of the pressing plate.

[0018] Preferably, as an improvement, the pressing mechanism further includes a fixedly installed driving cylinder for driving the pressing plate to move away from or close to the equal-height block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of Embodiment 1 of the present invention (wherein the orthopedic pressing rod, the equal-height block pressing rod, and the equal-height block are only schematically shown in the figure, and not all the pressing rods are shown, and the positioning pins are not shown in the figure).

[0020] Figure 2 It is a top view schematic diagram of the bottom support assembly on the bottom plate after placing the workpiece in Embodiment 1 of the present invention (where A represents the support position of the equal-height block, B represents the position where the positioning pin is inserted for positioning, and the remaining fan-shaped marked positions with 1 / 4 represent the corresponding support positions of the bottom support columns).

[0021] Figure 3 It is a front view schematic diagram of the present invention in Embodiment 1 for showing a pair of orthopedic pressing rods and the corresponding bottom support columns (where the bottom plate and the pressing plate are shown in a sectional view).

[0022] Figure 4 It is a front view schematic diagram of the present invention in Embodiment 1 for showing a pair of equal-height block pressing rods and the corresponding equal-height blocks (where only the pressing plate is shown in a sectional view).

[0023] Figure 5 The structural front view sectional view of the floating positioning pin used in the first embodiment of the present utility model.

[0024] Figure 6 For Figure 5 The front view and top view (excluding the spring) of the floating positioning pin before assembly in

[0025] Figure 7 The front view schematic diagram of the second embodiment of the present utility model.

[0026] Figure 8 The front view schematic diagram of the pull rod used in the second embodiment of the present utility model. Specific embodiments

[0027] The following is a further detailed description through specific embodiments:

[0028] The reference numerals in the accompanying drawings of the specification include: bottom plate 10, top plate 20, connecting column 30, downward pressing mechanism 1, driving cylinder 11, pressing plate 12, orthopedic pressing rod 13, bottom support assembly 2, positioning pin 21, bushing 211, pin body 212, spring 213, equal-height block 22, bottom support column 23, equal-height block pressing rod 14, elastic member 15, pull rod 16, limiting member 17, equal-height block support position A, positioning pin insertion position B.

[0029] Embodiment 1

[0030] Combined with Figures 1 to 6 , a pneumatic correction tooling, including a bottom plate 10, a top plate 20, a downward pressing mechanism 1 and a bottom support assembly 2, the bottom plate 10 is fixedly installed, the top plate 20 is located directly above the bottom plate 10, and a connecting column 30 is fixed between the bottom plate 10 and the top plate 20.

[0031] The downward pressing mechanism 1 includes a driving cylinder 11, a pressing plate 12, and a plurality of orthopedic pressing rods 13 threadedly connected to the pressing plate 12. The driving cylinder 11 is fixed on the top plate 20. The driving cylinder 11 is used to drive the pressing plate 12 to move away from or close to the bottom support assembly 2 (that is, the cylinder drives the pressing rod to move up and down). The upper section of the orthopedic pressing rod 13 is a threaded section, and a threaded through hole is processed on the pressing plate 12. The threaded section of the orthopedic pressing rod 13 is threadedly connected to the threaded through hole of the pressing plate 12.

[0032] The bottom support assembly 2 includes two positioning pins 21, three equal-height blocks 22 and a plurality of bottom support columns 23 with adjustable heights. The positioning pin 21 is used to position the workpiece. The equal-height blocks 22 are fixedly installed on the bottom plate 10. The bottom support column 23 has a threaded section, and the bottom support column 23 is threadedly connected to the threaded through hole of the bottom plate 10. One bottom support column 23 corresponds to each orthopedic pressing rod 13 below.

[0033] The connection lines of the three equal-height blocks 22 form a triangle to form a stable support for the workpiece.

[0034] The positioning pin 21 is a floating positioning pin 21. The floating positioning pin 21 includes a bushing 211 fixedly installed on the bottom plate 10, a pin body 212 slidably mounted on the bushing 211, and a spring 213 sleeved on the pin body 212. The bushing 211 is provided with a stepped through hole, and the stepped small hole is located above the stepped large hole. The pin body 212 is provided with an annular protrusion, and the annular protrusion is located in the stepped large hole. The spring 213 is sleeved on a section below the annular protrusion of the pin body 212, and the spring 213 is located in the stepped large hole. The bottom plate 10 is provided with a through hole for the pin body 212 to penetrate through. The upper section of the pin body 212 passes through the stepped small hole for insertion into the positioning hole of the workpiece, and the lower section of the pin body 212 is inserted into the through hole.

[0035] The length of the workpiece to be orthopedized >> width >> thickness. The number of the pressing mechanisms 1 is three, and the three pressing mechanisms 1 are arranged along the length direction of the workpiece. The equal-height blocks 22 are arranged below the middle pressing mechanism 1. An equal-height block pressing rod 14 is installed on the pressing plate 12 of the middle pressing mechanism 1. The equal-height block pressing rod 14 is slidably connected to the pressing plate 12, and an elastic member 15 is arranged between the equal-height block pressing rod 14 and the pressing plate 12. In this embodiment, the elastic member 15 is a spring 213. A shoulder is integrally formed on the outer periphery of the equal-height block pressing rod 14, and the elastic member 15 is located between the shoulder and the pressing plate 12.

[0036] Before orthopedization, the distance between the free end of the equal-height block pressing rod 14 and the surface of the workpiece directly below is greater than the distance between the orthopedic pressing rod 13 and the surface of the workpiece directly below.

[0037] When adopting this embodiment, according to the deformation condition of the workpiece, adjust the heights of the bottom support columns 23 and the corresponding orthopedic pressing rods 13 corresponding to the deformation positions. After adjustment, place the workpiece on the equal-height blocks 22 and insert the floating positioning pin 21 into the positioning hole of the workpiece; then control the middle pressing mechanism 1 to drive preferentially, so that the middle pressing plate 12 first drives the equal-height block pressing rod 14 to contact the workpiece to form pre-positioning and pre-clamping of the workpiece, and then the two side pressing mechanisms 1 are also started, so that the orthopedic pressing rods 13 and the bottom support columns 23 of the pressing mechanisms 1 form orthopedization of the deformed part of the workpiece.

[0038] Compared with the prior art, this embodiment has the following advantages:

[0039] First, simple operation: It is not necessary to manually adjust the number of thickness standard blocks. Only by screwing the orthopedic pressing rod 13 and the bottom support column 23 can the height be adjusted, thereby adjusting the amount of reverse deformation and simplifying the operation process.

[0040] Second, improved accuracy: Both the bottom support column 23 and the orthopedic pressing rod 13 can be adjusted in height, and the deformation amount of the casting can be compensated equally to ensure the dimensional accuracy after orthopedization.

[0041] Third, strong adaptability: Whether it is the deformation of upward warping or downward concavity, it can be effectively corrected, improving the practicality of the tooling.

[0042] Fourth, cost reduction: By adjusting the heights of the bottom support column 23 and the orthopedic pressing rod 13, the orthopedic requirements of different products can be met without replacing specific orthopedic templates, reducing the cost.

[0043] In summary, the pneumatic correction tooling provided by the present utility model, through the design of the height-adjustable bottom support column 23 and the orthopedic pressing rod 13, effectively solves the problems existing in the prior art, improves the correction efficiency and accuracy, and reduces the production cost.

[0044] Embodiment 2

[0045] Combined with Figure 7 and Figure 8 , on the basis of Embodiment 1, the following improvements are made in this Embodiment 2: A downward-facing pull rod 16 is fixed to the top plate 20. Both the top section and the bottom section of the pull rod 16 are threaded sections. The pull rod 16 penetrates downward through the pressing plate 12, and a limiting member 17 is fixed to the bottom of the pull rod 16 passing through the pressing plate 12. The limiting member in this embodiment is a limiting nut.

[0046] The pull rod 16 in this embodiment can not only form the guidance for the lifting movement of the pressing plate 12, but also use the limiting member 17 at the bottom end of the pull rod 16 to form the limitation of the downward pressing position of the pressing plate 12, avoiding situations such as the detachment of the pressing plate 12, excessive stroke, and incorrect installation direction of the pressing plate 12.

[0047] The above are only the embodiments of the present utility model. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A pneumatic correction tool, comprising a pressing mechanism and a bottom support assembly, characterized in that: The downward pressing mechanism includes a pneumatically driven lifting pressure plate, a height-adjustable orthopedic pressure rod installed on the pressure plate, and a bottom support assembly including a positioning pin, an equal height block and a bottom support column. The positioning pin is used to position the workpiece, the equal height block is fixedly installed, and the bottom support column can be adjusted in height. There is a bottom support column corresponding to each orthopedic pressure rod.

2. A pneumatic correction tool according to claim 1, characterized in that: The pressing plate of the pressing mechanism is also provided with a pressing rod of an equal height block, which is slidably connected to the pressing plate, and an elastic member is arranged between the pressing rod of the equal height block and the pressing plate.

3. A pneumatic correction tool according to claim 1, characterized in that: The number of the equal-height blocks is 3, and the connecting lines of the three equal-height blocks form a triangle.

4. A pneumatic correction tool according to claim 1, characterized in that: The locating pin is a floating locating pin, which comprises a fixedly installed bushing, a pin body sliding on the bushing, and a spring sleeved on the pin body.

5. The pneumatic correction tool according to claim 1, characterized in that: The orthopedic pressure rod and the bottom support column are both provided with threaded sections, and the threaded sections are used for threaded height adjustment.

6. A pneumatic correction tool according to claim 1, characterized in that: The length of the workpiece to be corrected>>the width of the workpiece>the thickness of the workpiece. There are three pressing mechanisms, which are arranged along the length direction of the workpiece, and the equal height block is arranged under the middle pressing mechanism.

7. The pneumatic correction tool according to claim 1, characterized in that: The pressing mechanism is installed on a fixed top plate, a pull rod is connected to the top plate, the pull rod passes through the pressing plate downward, and the pull rod passes through a fixed limiting member at the bottom of the pressing plate.

8. The pneumatic correction tool according to claim 1, characterized in that: The pressing mechanism further comprises a fixedly mounted driving cylinder, which is used to drive the pressing plate to move away from or close to the equal height block.

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