Metal mold three-dimensional precision detection auxiliary device

Abstract

The utility model provides metal mould three -dimensional precision detection auxiliary device relates to mould precision detection equipment field, the utility model discloses a three -dimensional detection machine, the one side of three -dimensional detection machine is provided with the slide, the utility model places the metal mould between two clamps in the one side of three -dimensional detection machine, and the electric telescopic handle in the hollow box inside is started to drive piston plate downward movement, and the hydraulic oil in the hollow box inside is extruded to enter the inside of oil pipe, then is transported to the oil tank, and the piston rod box one end is slid, drives the clamping plate to move to the one side of metal mould, then the metal mould surface is fixed with the help of auxiliary mechanism more closely clamped, and in this way, it is not easy to displace and shake in the detection process, and the clamping force of clamping plate can also be buffered through auxiliary mechanism, avoids the situation that mould produces micro -deformation or scratches the mould surface of precision machining to cause because of partial clamping force is too tight, improves detection precision and mould quality.

Description

Technical Field

[0001] This utility model relates to the field of mold precision testing equipment, and in particular to an auxiliary device for three-dimensional precision testing of metal molds. Background Technology

[0002] The three-dimensional precision inspection machine for metal molds is a precision measuring device specifically designed for high-precision inspection of the geometric dimensions, shape accuracy, and positional tolerances of metal molds.

[0003] A 3D coordinate measuring machine (CMM) uses a contact probe in conjunction with a sliding frame to collect data on key parts of a metal mold in three-dimensional space, including surface features, cavity structure, holes, and curved surfaces. The collected physical coordinate data is then compared and analyzed with the theoretical 3D model in the design drawings to accurately assess whether the mold meets design requirements. The sliding frame can be driven by a motor-driven lead screw or a motor-driven rack and pinion mechanism, so there are no fixed limitations. During the inspection process, traditional auxiliary clamping devices often use rigid clamps to directly fix the mold. However, metal mold surfaces often have irregular contours, curvatures, or uneven structures, making it difficult for the clamping surface of the rigid clamp to fully conform to the mold surface. This results in a small clamping contact area, uneven force, and the possibility of localized over-tightening causing micro-deformation of the mold, or localized insufficient clamping force leading to loosening. This not only causes deviations in the inspection data but may also cause the mold to shift during inspection due to unstable clamping, or even scratch the precision-machined mold surface, seriously affecting the inspection accuracy and mold quality. Utility Model Content

[0004] The technical problem this invention aims to solve is that during the testing process, traditional auxiliary clamping devices often use rigid clamping plates to directly fix the mold. However, the surface of metal molds often has irregular contours, curvatures, or uneven structures, making it difficult for the clamping surface of the rigid clamping plate to fully fit the mold surface. This results in a small clamping contact area and uneven force, which can easily lead to local overtightness causing micro-deformation of the mold, or local insufficient clamping force causing loosening. This not only causes deviations in the test data but may also cause the mold to shift during the testing process due to unstable clamping, or even scratch the precision-machined mold surface, seriously affecting the testing accuracy and mold quality.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a three-dimensional precision inspection auxiliary device for metal molds, including a three-dimensional inspection machine. A sliding frame is provided on one side of the three-dimensional inspection machine, and a contact probe is provided on one side of the sliding frame. A limiting device is provided on one side of the three-dimensional inspection machine. The limiting device can clamp and fix the metal mold placed on the three-dimensional inspection machine by two clamping plates, which facilitates more accurate inspection. At the same time, several limiting rods and a first spring are provided on the clamping plates to buffer the clamping plates and the metal mold, so as to avoid scratching the mold surface.

[0006] Preferably, the limiting device includes a hollow box, one side of which is fixedly installed on one side of the three-dimensional measuring machine, and symmetrically formed circular holes on one side of the inner wall of the hollow box; an electric telescopic rod, one end of which is fixedly installed on one side of the inner wall of the hollow box; a piston plate, which is slidably installed in the inner wall of the hollow box, and one side of which is fixedly installed on the output end of the electric telescopic rod; two oil pipes, one end of which is installed through one side of the hollow box; and several oil tanks, one side of which is symmetrically fixedly installed on one side of both ends of the three-dimensional measuring machine, and the two ends of the two oil pipes are respectively installed through one side of the several oil tanks. Several piston rods, one end of which is slidably mounted in the inner wall of the oil tank, and the other end passes through one side of the inner wall of the oil tank, with a certain gap between the outer surface of the piston rod and the oil tank to facilitate gas flow; a clamping plate, one side of which is fixedly mounted on one side of the piston rod; a second spring, the inner wall of which is sleeved on the outer surface of one end of the piston rod, and both ends are fixedly mounted on one side of the piston rod and one side of the inner wall of the oil tank, respectively; an auxiliary mechanism, which is set on one side of the clamping plate to buffer the clamping force between the clamping plate and the metal mold, and at the same time shrinks accordingly according to the surface shape of the metal mold, so that the clamping plate fits the surface of the metal mold better.

[0007] The effect achieved by the above components is as follows: by setting a limiting device, the three-dimensional inspection machine moves in three-dimensional space with a contact probe and a sliding frame to collect point data on key parts such as surface features, cavity structure, hole positions, and curved surfaces of the metal mold. The collected physical coordinate data is compared and analyzed with the theoretical three-dimensional model in the design drawings to accurately assess whether the mold meets the design requirements. The internal drive of the sliding frame can be either a motor driving a lead screw or a motor driving a gear rack, so there is no fixed limitation. Before testing, the metal mold can be placed on one side of the three-dimensional measuring machine between two clamping plates. Then, the electric telescopic rod inside the hollow box is activated to drive the piston plate downward, squeezing the hydraulic oil inside the hollow box into the oil pipe and then delivering it to the oil tank. This pushes the piston rod to slide to one end. One end of the piston rod is slidably installed in the inner wall of the oil tank, while the other end penetrates the outer surface of the inner wall of the oil tank. There is a certain gap between the piston rod and the oil tank to facilitate gas flow, thus facilitating the back-and-forth movement of the piston rod. The movement of the piston rod to one end will drive the clamping plate to move towards the metal mold side. Then, with the help of the auxiliary mechanism, the surface of the metal mold is clamped and fixed more closely. This makes it less likely for displacement and shaking to occur during the testing process. The auxiliary mechanism can also buffer the clamping force of the clamping plate, avoiding the situation where the local clamping force is too tight, causing micro-deformation of the mold or scratching the precision-machined mold surface, thereby improving the testing accuracy and mold quality.

[0008] Preferably, the auxiliary mechanism includes a plurality of limiting rods, wherein the limiting rods are installed through one side of the clamping plate; and a plurality of first springs, wherein the inner wall of the first spring is sleeved on the outer surface of one end of the limiting rod, and the two ends are respectively fixedly installed on one side of the limiting rod and one side of the clamping plate.

[0009] The effect achieved by the above-mentioned components is as follows: By setting up an auxiliary mechanism, when the clamping plate moves towards and clamps the surface of the metal mold, one end of several limiting rods on the clamping plate will first contact the surface of the metal mold. As the clamping plate continues to move, the limiting rods will contract accordingly according to the shape of the surface of the metal mold, driving the corresponding first spring to stretch. This allows the surface of the clamping plate to fit more closely to the surface of the metal mold, clamping and fixing irregularly shaped metal molds. At the same time, the limiting rods and the first spring work together to buffer the clamping force of the clamping plate, avoiding the situation where the local clamping force is too tight, causing micro-deformation of the mold or scratching of the precision-machined mold surface, thus improving the detection accuracy and mold quality.

[0010] Preferably, the limiting device further includes a plurality of elastic rubber blocks, wherein one side of the plurality of elastic rubber blocks is fixedly installed in the inner wall of the circular hole at equal intervals.

[0011] The effect achieved by the above components is that by setting up elastic rubber blocks, the inner wall of the round hole can be sealed, so that when the electric telescopic rod is not moving, external dust and impurities are not easily allowed to enter the inner wall of the hollow box.

[0012] Preferably, a reinforcing rod is symmetrically fixedly installed on the outer surface of the output end of the electric telescopic rod, and one side of the reinforcing rod is fixedly installed on one side of the piston plate.

[0013] The effect achieved by the above components is that by setting up reinforcing rods, the connection area between the output end of the electric telescopic rod and the piston plate can be increased, making the connection more secure and stable.

[0014] Preferably, a support mechanism is provided between the outer surface of the oil pipe and one side of the three-dimensional measuring machine. The support mechanism includes a bracket, one side of which is fixedly installed on one side of the three-dimensional measuring machine; and a plurality of elastic arc blocks, wherein the outer surface of the elastic arc blocks is fixedly installed on one side of one end of the bracket, and the outer surface of the oil pipe is inserted into the inner wall of the elastic arc blocks.

[0015] The effect achieved by the above components is that, by setting up a support mechanism, after the oil pipe is installed by passing through one side of the hollow box and the oil tank, its outer surface can be inserted into the inner wall of the elastic arc block on the bracket to support and fix it, so that it is not easy to shake during use.

[0016] Preferably, a plurality of anti-slip strips are fixedly installed on the inner wall of the elastic arc block, and the anti-slip strips are made of rubber.

[0017] The effect achieved by the above components is that by setting anti-slip strips, the contact friction of the inner wall of the elastic arc block can be increased, making it less likely for the oil pipe to slip after being inserted into the inner wall of the elastic arc block, and the limiting support is more firm and stable.

[0018] Preferably, limit blocks are fixedly installed at both ends of the elastic arc block, wherein the two limit blocks are fixedly installed at an angle on both sides of the entrance of the elastic arc block.

[0019] The effect achieved by the above components is that by setting a limiting block, the area at the entrance of the elastic arc block can be increased, making it easier for the oil pipe to be quickly aligned and inserted.

[0020] The beneficial effects of this utility model are:

[0021] Before testing, the metal mold can be placed on one side of the three-dimensional measuring machine between two clamping plates. Then, the electric telescopic rod inside the hollow box is activated, which drives the piston plate downward, squeezing the hydraulic oil inside the hollow box into the oil pipe and then into the oil tank. This pushes the piston rod to slide to one end. One end of the piston rod is slidably installed in the inner wall of the oil tank, while the other end passes through one side of the inner wall of the oil tank. There is a certain gap between the outer surface of the piston rod and the oil tank, which facilitates gas flow and allows the piston rod to move back and forth. The movement of the piston rod to one end will drive the clamping plate to move towards the metal mold. Then, with the help of the auxiliary mechanism, the surface of the metal mold is clamped and fixed more closely. This makes it less likely for displacement and shaking to occur during the testing process. The auxiliary mechanism can also buffer the clamping force of the clamping plate, avoiding excessive local clamping force that could cause micro-deformation of the mold or scratches on the precision-machined mold surface, thus improving the testing accuracy and mold quality. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a three-dimensional structural diagram of the three-dimensional measuring machine of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the hollow box section of this utility model;

[0026] Figure 4 for Figure 3 A three-dimensional structural diagram of the electric telescopic pole.

[0027] Figure 5 for Figure 3 A three-dimensional structural diagram of the fuel tank area;

[0028] Figure 6 for Figure 3 A three-dimensional structural diagram of the central support.

[0029] Legend: 1. Three-dimensional measuring machine; 2. Limiting device; 3. Sliding frame; 4. Contact probe; 21. Hollow box; 22. Electric telescopic rod; 23. Circular hole; 24. Piston plate; 25. Oil pipe; 26. Oil tank; 27. Piston rod; 28. Support mechanism; 281. Bracket; 282. Elastic arc block; 283. Limiting block; 284. Anti-slip strip; 29. ​​Auxiliary mechanism; 291. Limiting rod; 292. First spring; 210. Clamping plate; 211. Second spring; 212. Elastic rubber block; 213. Reinforcing rod. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Figure 1-6 The illustrated auxiliary device for three-dimensional precision inspection of metal molds includes a three-dimensional inspection machine 1. A sliding frame 3 is mounted on one side of the three-dimensional inspection machine 1, and a contact probe 4 (model HP-THDe) is mounted on one side of the sliding frame 3. A limiting device 2 is mounted on one side of the three-dimensional inspection machine 1. The limiting device 2 clamps and fixes the metal mold placed on the three-dimensional inspection machine 1 using two clamping plates 210, facilitating more accurate inspection. Simultaneously, several limiting rods 291 and a first spring 292 mounted on the clamping plates 210 provide buffering clamping between the clamping plates 210 and the metal mold to prevent scratching the mold surface. It should be noted that the contact probe 4 is a mature technology and equipment in the prior art; its internal structure, connection method, and principle will not be elaborated upon.

[0033] Figure 1-6The limiting device 2 shown includes a hollow box 21, one side of which is fixedly installed on one side of the three-dimensional measuring machine 1, and symmetrically arranged circular holes 23 on one side of the inner wall of the hollow box 21; an electric telescopic rod 22, one end of which is fixedly installed on one side of the inner wall of the hollow box 21; a piston plate 24, which is slidably installed in the inner wall of the hollow box 21, and one side is fixedly installed on the output end side of the electric telescopic rod 22; two oil pipes 25, one end of which is installed through one side of the hollow box 21; several oil tanks 26, one side of which is symmetrically fixedly installed on one side of both ends of the three-dimensional measuring machine 1, and the two ends of the two oil pipes 25 are respectively installed through one side of the several oil tanks 26; several movable... A piston rod 27, one end of which is slidably mounted in the inner wall of the oil tank 26, and the other end passes through one side of the inner wall of the oil tank 26, with a certain gap between its outer surface and the oil tank 26 to facilitate gas flow; a clamping plate 210, one side of which is fixedly mounted on one side of the piston rod 27; a second spring 211, the inner wall of which is sleeved on the outer surface of one end of the piston rod 27, and both ends are fixedly mounted on one side of the piston rod 27 and one side of the inner wall of the oil tank 26, respectively; and an auxiliary mechanism 29, which is disposed on one side of the clamping plate 210 to buffer the clamping force between the clamping plate 210 and the metal mold, and to shrink accordingly according to the surface shape of the metal mold, so that the clamping plate 210 fits the surface of the metal mold more closely. By setting a limiting device 2, the three-dimensional inspection machine 1 moves in three-dimensional space with the contact probe 4 and the sliding frame 3 to collect point data on key parts such as surface features, cavity structure, hole positions, and curved surfaces of the metal mold. The collected physical coordinate data is compared and analyzed with the theoretical three-dimensional model in the design drawings to accurately evaluate whether the mold meets the design requirements.The internal drive of the sliding frame 3 can be either a motor driving a lead screw or a motor driving a gear rack, so there is no fixed limitation. Before testing, the metal mold can be placed on one side of the three-dimensional measuring machine 1, between the two clamping plates 210. Then, the electric telescopic rod 22 inside the hollow box 21 is activated to drive the piston plate 24 downward, squeezing the hydraulic oil inside the hollow box 21 into the oil pipe 25, and then transporting it to the oil tank 26, pushing the piston rod 27 to slide to one end. Here, one end of the piston rod 27 is slidably installed in the inner wall of the oil tank 26, while the other end passes through the oil tank. There is a certain gap between the inner wall of the oil tank 26 and the outer surface of the oil tank 26 to facilitate gas flow, thereby facilitating the back-and-forth movement of the piston rod 27. The movement of the piston rod 27 to one end will drive the clamping plate 210 to move towards the metal mold side. Then, with the help of the auxiliary mechanism 29, the surface of the metal mold is clamped and fixed more closely. This makes it less likely to displace or shake during the inspection process. The auxiliary mechanism 29 can also buffer the clamping force of the clamping plate 210 to avoid the mold from being slightly deformed or scratched due to excessive local clamping force, thereby improving the inspection accuracy and mold quality. The auxiliary mechanism 29 includes several limiting rods 291, which are installed through one side of the clamping plate 210; and several first springs 292, the inner wall of the first spring 292 is sleeved on the outer surface of one end of the limiting rod 291, and the two ends are respectively fixed to one side of the limiting rod 291 and one side of the clamping plate 210. By setting the auxiliary mechanism 29, when the clamping plate 210 moves towards and clamps the surface of the metal mold, one end of several limiting rods 291 on the clamping plate 210 will preferentially contact the surface of the metal mold. As the clamping plate 210 continues to move, the limiting rods 291 will contract accordingly according to the shape of the surface of the metal mold, which will drive the corresponding first spring 292 to stretch. This allows the surface of the clamping plate 210 to fit more closely to the surface of the metal mold, clamping and fixing irregularly shaped metal molds. At the same time, the limiting rods 291 and the first spring 292 work together to buffer the clamping force of the clamping plate 210, avoiding excessive local clamping force that could cause micro-deformation of the mold or scratches on the precision-machined mold surface, thereby improving the detection accuracy and mold quality.

[0034] Figure 1-6The limiting device 2 shown also includes several elastic rubber blocks 212, one side of which is fixedly installed at equal intervals in the inner wall of the circular hole 23. By setting the elastic rubber blocks 212, the inner wall of the circular hole 23 can be sealed, making it difficult for external dust and impurities to enter the inner wall of the hollow box 21 when the electric telescopic rod 22 is not moving. Reinforcing rods 213 are symmetrically fixedly installed on the outer surface of the output end of the electric telescopic rod 22, and one side of the reinforcing rod 213 is fixedly installed on one side of the piston plate 24. By setting the reinforcing rods 213, the connection area between the output end of the electric telescopic rod 22 and the piston plate 24 can be increased, making the connection more secure and stable.

[0035] Figure 1-6 A support mechanism 28 is provided between the outer surface of the oil pipe 25 and one side of the three-dimensional measuring machine 1. The support mechanism 28 includes a bracket 281, one side of which is fixedly installed on one side of the three-dimensional measuring machine 1; and several elastic arc blocks 282, the outer surface of which is fixedly installed on one end of the bracket 281, and the outer surface of the oil pipe 25 is inserted into the inner wall of the elastic arc blocks 282. By providing the support mechanism 28, after the oil pipe 25 is installed by passing several ends through one side of the hollow box 21 and the oil tank 26 respectively, its outer surface can be inserted into the inner wall of the elastic arc blocks 282 on the bracket 281 to support and fix it, making it less prone to shaking during use.

[0036] Figure 1-6 The inner wall of the elastic arc block 282 shown is fixedly equipped with several anti-slip strips 284, which are made of rubber. By setting the anti-slip strips 284, the contact friction of the inner wall of the elastic arc block 282 can be increased, making it less likely for the oil pipe 25 to slip after being inserted into the inner wall of the elastic arc block 282, thus providing a more secure and stable limiting support. Limiting blocks 283 are fixedly installed at both ends of the elastic arc block 282, with two of the limiting blocks 283 being fixedly installed at an angle on both sides of the entrance of the elastic arc block 282. By setting the limiting blocks 283, the area at the entrance of the elastic arc block 282 can be increased, making it easier for the oil pipe 25 to be quickly aligned and inserted.

[0037] Working principle: The three-dimensional inspection machine 1 uses a contact probe 4 and a sliding frame 3 to move and collect data on key parts of the metal mold, such as surface features, cavity structure, hole positions, and curved surfaces, in three-dimensional space. The collected physical coordinate data is compared and analyzed with the theoretical three-dimensional model in the design drawings to accurately assess whether the mold meets the design requirements. The internal drive of the sliding frame 3 can be either a motor driving a lead screw or a motor driving a gear rack, so there is no fixed limitation. Before testing, the metal mold can be placed on one side of the three-dimensional measuring machine 1, between the two clamping plates 210. Then, the electric telescopic rod 22 inside the hollow box 21 is activated, which drives the piston plate 24 to move downward, squeezing the hydraulic oil inside the hollow box 21 into the oil pipe 25, and then transporting it to the oil tank 26. This pushes the piston rod 27 to slide to one end. Here, one end of the piston rod 27 is slidably installed in the inner wall of the oil tank 26, while the other end passes through one side of the inner wall of the oil tank 26, and there is a certain gap between the outer surface and the oil tank 26 to facilitate gas flow, thus facilitating the back-and-forth movement of the piston rod 27. The piston rod 27 moving to one end will... The clamping plate 210 moves towards the metal mold. As the clamping plate 210 moves towards and clamps the surface of the metal mold, one end of several limiting rods 291 on the clamping plate 210 will preferentially contact the surface of the metal mold. With the continued movement of the clamping plate 210, the limiting rods 291 will contract accordingly according to the shape of the surface of the metal mold, causing the corresponding first spring 292 to stretch. This allows the surface of the clamping plate 210 to fit more closely to the surface of the metal mold, clamping and fixing irregularly shaped metal molds. At the same time, the limiting rods 291 and the first spring 292 work together to buffer the clamping force of the clamping plate 210, avoiding excessive local clamping force that could cause micro-deformation of the mold or scratches on the precision-machined mold surface, thus improving the detection accuracy and mold quality.

[0038] After the oil pipe 25 is installed by passing several ends through one side of the hollow box 21 and the oil tank 26, its outer surface can be inserted into the inner wall of the elastic arc block 282 on the bracket 281 to support and fix it, so that it is not easy to shake during use.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A three-dimensional precision inspection auxiliary device for metal molds, including a three-dimensional inspection machine (1), characterized in that: A sliding frame (3) is provided on one side of the three-dimensional inspection machine (1), and a contact probe (4) is provided on one side of the sliding frame (3). A limiting device (2) is provided on one side of the three-dimensional inspection machine (1). The limiting device (2) can clamp and fix the metal mold placed on the three-dimensional inspection machine (1) through two clamping plates (210), which facilitates more accurate inspection. At the same time, the clamping plate (210) and the metal mold are buffered and clamped by several limiting rods (291) and the first spring (292) provided on the clamping plate (210) to avoid scratching the surface of the mold.

2. The auxiliary device for three-dimensional precision inspection of metal molds according to claim 1, characterized in that: The limiting device (2) includes a hollow box (21), wherein one side of the hollow box (21) is fixedly installed on one side of the three-dimensional measuring machine (1), and a circular hole (23) is symmetrically opened on one side of the inner wall of the hollow box (21). An electric telescopic rod (22), one end of which is fixedly installed on one side of the inner wall of the hollow box (21); Piston plate (24), wherein the piston plate (24) is slidably installed in the inner wall of the hollow box (21), and one side is fixedly installed on the output end side of the electric telescopic rod (22); Two oil pipes (25), one end of which is installed through and on one side of the hollow box (21); Several oil tanks (26) are symmetrically fixed on one side of one end of the three-dimensional measuring machine (1), and the two ends of two oil pipes (25) are respectively installed through one side of the several oil tanks (26). Several piston rods (27), one end of which is slidably installed in the inner wall of the oil tank (26), and the other end passes through one side of the inner wall of the oil tank (26). There is a certain gap between the outer surface of the piston rod (27) and the oil tank (26) to facilitate gas flow. A clamping plate (210), wherein one side of the clamping plate (210) is fixedly mounted on one side of the piston rod (27); The second spring (211) has its inner wall sleeved on the outer surface of one end of the piston rod (27), and its two ends are respectively fixedly installed on one side of the piston rod (27) and one side of the inner wall of the oil tank (26); The auxiliary mechanism (29) is located on one side of the clamping plate (210) to buffer the clamping force between the clamping plate (210) and the metal mold, and shrinks accordingly according to the shape of the metal mold surface so that the clamping plate (210) fits the metal mold surface more closely.

3. The auxiliary device for three-dimensional precision inspection of metal molds according to claim 2, characterized in that: The auxiliary mechanism (29) includes several limiting rods (291), wherein the limiting rods (291) are installed through one side of the clamping plate (210); Several first springs (292) are provided, wherein the inner wall of the first spring (292) is sleeved on the outer surface of one end of the limiting rod (291), and both ends are fixedly installed on one side of the limiting rod (291) and one side of the clamp (210).

4. The auxiliary device for three-dimensional precision inspection of metal molds according to claim 2, characterized in that: The limiting device (2) also includes several elastic rubber blocks (212), wherein one side of several elastic rubber blocks (212) is fixedly installed in the inner wall of the circular hole (23) at equal intervals.

5. The auxiliary device for three-dimensional precision inspection of metal molds according to claim 2, characterized in that: A reinforcing rod (213) is symmetrically fixedly installed on the outer surface of the output end of the electric telescopic rod (22), and one side of the reinforcing rod (213) is fixedly installed on one side of the piston plate (24).

6. The auxiliary device for three-dimensional precision inspection of metal molds according to claim 2, characterized in that: A support mechanism (28) is provided between the outer surface of the oil pipe (25) and one side of the three-dimensional measuring machine (1). The support mechanism (28) includes a bracket (281), wherein one side of the bracket (281) is fixedly installed on one side of the three-dimensional measuring machine (1). Several elastic arc blocks (282) are provided, wherein the outer surface of the elastic arc block (282) is fixedly installed on one side of one end of the bracket (281), and the outer surface of the oil pipe (25) is inserted into the inner wall of the elastic arc block (282).

7. The three-dimensional precision inspection auxiliary device for metal molds according to claim 6, characterized in that: The inner wall of the elastic arc block (282) is fixedly equipped with several anti-slip strips (284), which are made of rubber.

8. The three-dimensional precision inspection auxiliary device for metal molds according to claim 6, characterized in that: Both ends of the elastic arc block (282) are fixedly installed with limit blocks (283), and the two limit blocks (283) are fixedly installed at the entrance of the elastic arc block (282) on both sides at an angle.

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