Auxiliary tool for centering male die cavity and female die cavity of cold header

Abstract

The invention discloses an auxiliary tool for centering a male die cavity and a female die cavity of a cold header, which comprises a female die measuring sleeve, a male die measuring sleeve, a calibration sleeve, a displacement sensor and a display mechanism, and is characterized in that the female die measuring sleeve comprises a first measuring sleeve and a second measuring sleeve; the side wall of the second measuring sleeve is provided with a plurality of measuring holes, the measuring holes are arranged along the radial direction of the second measuring sleeve, and the plurality of measuring holes are respectively and annularly arranged along the axis of the second measuring sleeve; and a displacement sensor is arranged in each measuring hole and is connected with a display mechanism. The die has the technical effects that the offset between the female die cavity and the male die cavity can be visually observed by utilizing the display mechanism, so that the concentricity of the die can be conveniently and quickly adjusted; in the using process, the concentricity of the male and female die cavities of the cold header can be simply, stably and reliably adjusted, a traditional manual tool does not need to be used in the adjusting process, operation is easy, the requirement for operators is low, accurate centering of the male and female die cavities can be rapidly achieved, and the effect is good after practical application.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle parts production, and particularly relates to an auxiliary tool for centering the convex and concave die cavities of a cold heading machine. Background Art

[0002] During the production process of some parts of new energy vehicles, a cold heading machine is required. When the cold heading machine is running, the punch reciprocates left and right, and the die is stationary. The punch and the die are respectively installed in the punch cavity and the die cavity. During the cold heading production process, it is required that the punch cavity and the die cavity must be well centered, and the eccentricity error cannot exceed 0.1 mm. Therefore, during the operation of the cold heading machine, it is often necessary to calibrate the centering of the punch and the die to ensure the processing accuracy. In the prior art, the centering calibration work is manually operated. The operator adjusts the position of the punch cavity manually to achieve the centering of the two. The commonly used tools are centering sleeves and feeler gauges. The operation is complex, the efficiency is very low, and usually an experienced operator is required to complete it. Summary of the Invention

[0003] Therefore, the present invention provides an auxiliary tool for centering the convex and concave die cavities of a cold heading machine to solve the above problems in the prior art.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] According to the first aspect of the present invention, an auxiliary tool for centering the convex and concave die cavities of a cold heading machine includes a die measuring sleeve, a punch measuring sleeve, a calibration sleeve, a displacement sensor, and a display mechanism. The die measuring sleeve includes a first measuring sleeve and a second measuring sleeve. Both the first measuring sleeve and the second measuring sleeve are cylindrical. The first measuring sleeve and the second measuring sleeve are coaxially arranged. One end of the first measuring sleeve is connected to one end of the second measuring sleeve. A plurality of measuring holes are provided on the side wall of the second measuring sleeve. The measuring holes are arranged along the radial direction of the second measuring sleeve. The plurality of measuring holes are respectively arranged annularly along the axis of the second measuring sleeve.

[0006] A displacement sensor is provided in each of the measuring holes. The displacement sensor is connected to the display mechanism.

[0007] The punch measuring sleeve includes a third measuring sleeve and a fourth measuring sleeve. Both the third measuring sleeve and the fourth measuring sleeve are cylindrical. The third measuring sleeve and the fourth measuring sleeve are coaxially arranged. One end of the third measuring sleeve is connected to one end of the fourth measuring sleeve.

[0008] The calibration sleeve includes a first mounting sleeve and a second mounting sleeve. Both the first mounting sleeve and the second mounting sleeve are cylindrical. The first mounting sleeve and the second mounting sleeve are coaxially arranged, and one end of the first mounting sleeve is connected to one end of the second mounting sleeve.

[0009] The outer diameter of the first measuring sleeve is adapted to the inner diameter of the die body. The inner diameter of the second measuring sleeve is adapted to the outer diameter of the fourth measuring sleeve. The outer diameter of the third measuring sleeve is adapted to the inner diameter of the punch body. And the inner diameter of the first measuring sleeve is adapted to the outer diameter of the first mounting sleeve. The inner diameter of the second measuring sleeve is adapted to the outer diameter of the second mounting sleeve.

[0010] Further, the display mechanism includes a mounting base and a plurality of displays. The plurality of displays are all mounted on the mounting base. The displays are arranged in one-to-one correspondence with the displacement sensors. Each displacement sensor is connected to one display.

[0011] Further, the mounting base includes a base and a mounting plate. The base is horizontally arranged. The mounting plate is inclined. The bottom end of the mounting plate is connected to the base. The displacement sensor is arranged on the mounting plate.

[0012] Further, four measuring holes are provided on the side wall of the second measuring sleeve. The four measuring holes are respectively arranged in a circular array along the axis of the second measuring sleeve.

[0013] The display mechanism includes four displays. The four displays are all arranged on the mounting plate.

[0014] Further, a plurality of planes are provided on the outer side wall of the second measuring sleeve. The planes are arranged in one-to-one correspondence with the measuring holes. Each measuring hole is located in one plane.

[0015] Further, the concentricity between the first measuring sleeve and the second measuring sleeve is less than 0.01 mm.

[0016] The concentricity between the third measuring sleeve and the fourth measuring sleeve is less than 0.01 mm.

[0017] The concentricity between the first mounting sleeve and the second mounting sleeve is less than 0.01 mm.

[0018] Further, a die cavity is provided in the die body. When the first measuring sleeve is inserted into the die cavity, the gap between the outer side wall of the first measuring sleeve and the inner side wall of the die cavity is less than 0.02 mm.

[0019] When the fourth measuring sleeve is inserted into the second measuring sleeve, the gap between the outer sidewall of the fourth measuring sleeve and the inner sidewall of the second measuring sleeve is less than 0.02 mm;

[0020] A punch cavity is provided in the punch body. When the third measuring sleeve is inserted into the punch cavity, the gap between the outer sidewall of the third measuring sleeve and the inner wall of the punch cavity is less than 0.02 mm.

[0021] Further, after the first mounting sleeve is inserted into the first measuring sleeve, the gap between the outer sidewall of the first mounting sleeve and the inner sidewall of the first measuring sleeve is less than 0.02 mm;

[0022] After the second mounting sleeve is inserted into the second measuring sleeve, the gap between the outer sidewall of the second mounting sleeve and the inner sidewall of the second measuring sleeve is less than 0.02 mm.

[0023] Further, the accuracy of the displacement sensor is 0.01 mm, and the measuring range of the displacement sensor is 5 mm.

[0024] Further, the concave die measuring sleeve, the punch measuring sleeve and the calibration sleeve are all made of die steel.

[0025] The present invention has the following advantages: The concave die measuring sleeve, the punch measuring sleeve, the calibration sleeve, the displacement sensor and the display mechanism cooperate with each other. During the centering process, the offset between the concave die cavity and the punch cavity can be intuitively observed by using the display mechanism, so as to facilitate the quick adjustment of their concentricity; During the use process, the concentricity of the punch and die cavities of the cold heading machine can be adjusted simply, stably and reliably. During the adjustment process, traditional manual tools are not required, the operation is simple, the requirements for operators are low, the accurate centering of the punch and die cavities can be quickly realized, and the effect is good after practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0027] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved.

[0028] Figure 1 The first perspective view of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0029] Figure 2 The second perspective view of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0030] Figure 3 The sectional view of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0031] Figure 4 The overall structural schematic diagram of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention when calibrated using a calibration sleeve.

[0032] Figure 5 The sectional view of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention when calibrated using a calibration sleeve.

[0033] Figure 6 The respective views of the measuring bracket of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0034] Figure 7 The respective views of the concave die measuring sleeve of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0035] Figure 8 The respective views of the punch measuring sleeve of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0036] Figure 9 The respective views of the calibration sleeve of an auxiliary tool for aligning the convex and concave die cavities of a cold heading machine provided by some embodiments of the present invention.

[0037] In the figure: 1. Concave die body, 2. Concave die measuring sleeve, 3. Displacement sensor, 4. Punch body, 5. Punch measuring sleeve, 6. Concave die cavity, 7. Punch cavity, 8. Calibration sleeve, 9. Base, 10. Mounting plate, 11. Display, 12. First measuring sleeve, 13. Second measuring sleeve, 14. First measuring cavity, 15. Second measuring cavity, 16. Measuring hole, 17. Third measuring sleeve, 18. Fourth measuring sleeve, 19. Third measuring cavity, 20. Fourth measuring cavity, 21. First mounting sleeve, 22. Second mounting sleeve, 23. First mounting cavity, 24. Second mounting cavity. Detailed implementation manners

[0038] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0039] Embodiment 1

[0040] As Figures 1 to 9 shown, an auxiliary tool for centering the convex and concave die cavities of a cold heading machine in the first aspect embodiment of the present invention includes a concave die measuring sleeve 2, a convex die measuring sleeve 5, a calibration sleeve 8, a displacement sensor 3, and a display mechanism. The concave die measuring sleeve 2 is made of die steel. The concave die measuring sleeve 2 includes a first measuring sleeve 12 and a second measuring sleeve 13. Both the first measuring sleeve 12 and the second measuring sleeve 13 are cylindrical. The diameter of the first measuring sleeve 12 is smaller than that of the second measuring sleeve 13. The first measuring sleeve 12 and the second measuring sleeve 13 are coaxially arranged. The concentricity between the first measuring sleeve 12 and the second measuring sleeve 13 is less than 0.01 mm. The first measuring sleeve 12 and the second measuring sleeve 13 are of an integral structure, and one end of the first measuring sleeve 12 is connected to one end of the second measuring sleeve 13. A plurality of measuring holes 16 are provided on the side wall of the second measuring sleeve 13. The measuring holes 16 are arranged along the radial direction of the second measuring sleeve 13. The plurality of measuring holes 16 are respectively arranged annularly along the axis of the second measuring sleeve 13.

[0041] A displacement sensor 3 is provided in each measuring hole 16. The displacement sensor 3 is connected to the display mechanism. The displacement sensor 3 is a precision measurement contact digital sensor with an accuracy of 0.01 mm and a measuring range of 5 mm. The probe can be telescopic after contacting the object to be measured.

[0042] The convex die measuring sleeve 5 is made of die steel. The convex die measuring sleeve 5 includes a third measuring sleeve 17 and a fourth measuring sleeve 18. Both the third measuring sleeve 17 and the fourth measuring sleeve 18 are cylindrical. The diameter of the third measuring sleeve 17 is smaller than that of the fourth measuring sleeve 18. The third measuring sleeve 17 and the fourth measuring sleeve 18 are coaxially arranged. The concentricity between the third measuring sleeve 17 and the fourth measuring sleeve 18 is less than 0.01 mm. The third measuring sleeve 17 and the fourth measuring sleeve 18 are of an integral structure, and one end of the third measuring sleeve 17 is connected to one end of the fourth measuring sleeve 18.

[0043] The calibration sleeve 8 is made of die steel. The calibration sleeve 8 includes a first mounting sleeve 21 and a second mounting sleeve 22. Both the first mounting sleeve 21 and the second mounting sleeve 22 are cylindrical. The diameter of the first mounting sleeve 21 is smaller than that of the second mounting sleeve 22. The first mounting sleeve 21 and the second mounting sleeve 22 are coaxially arranged. The concentricity between the first mounting sleeve 21 and the second mounting sleeve 22 is less than 0.01 mm. The first mounting sleeve 21 and the second mounting sleeve 22 are of an integral structure. One end of the first mounting sleeve 21 is connected to one end of the second mounting sleeve 22.

[0044] As Figure 2 and Figure 3 shown, the outer diameter of the first measuring sleeve 12 matches the inner diameter of the die body 1, and the first measuring sleeve 12 can be inserted into the die body 1; the inner diameter of the second measuring sleeve 13 matches the outer diameter of the fourth measuring sleeve 18, and the fourth measuring sleeve 18 can be inserted into the second measuring sleeve 13; the outer diameter of the third measuring sleeve 17 matches the inner diameter of the punch body 4, and the third measuring sleeve 17 can be inserted into the punch body 4; as Figure 4 and Figure 5 shown, the inner diameter of the first measuring sleeve 12 matches the outer diameter of the first mounting sleeve 21, and the first mounting sleeve 21 can be inserted into the first measuring sleeve 12; the inner diameter of the second measuring sleeve 13 matches the outer diameter of the second mounting sleeve 22, and the second mounting sleeve 22 can be inserted into the second measuring sleeve 13.

[0045] In this embodiment, it should be noted that a first measuring cavity 14 and a second measuring cavity 15 are respectively provided in the first measuring sleeve 12 and the second measuring sleeve 13, and the first measuring cavity 14 and the second measuring cavity 15 communicate with each other; a third measuring cavity 19 and a fourth measuring cavity 20 are respectively provided in the third measuring sleeve 17 and the fourth measuring sleeve 18, and the third measuring cavity 19 and the fourth measuring cavity 20 communicate with each other; a first mounting cavity 23 and a second mounting cavity 24 are respectively provided in the first mounting sleeve 21 and the second mounting sleeve 22, and the first mounting cavity 23 and the second mounting cavity 24 communicate with each other; the first measuring cavity 14, the second measuring cavity 15, the third measuring cavity 19, the fourth measuring cavity 20, the first mounting cavity 23 and the second mounting cavity 24 are all cylindrical;

[0046] A die cavity 6 is provided in the die body 1. When the first measuring sleeve 12 is inserted into the die cavity 6, it can slide freely, and the gap between the outer side wall of the first measuring sleeve 12 and the inner side wall of the die cavity 6 is less than 0.02 mm;

[0047] When the fourth measuring sleeve 18 is inserted into the second measuring sleeve 13, it can slide freely, and the gap between the outer side wall of the fourth measuring sleeve 18 and the inner side wall of the second measuring sleeve 13 is less than 0.02 mm;

[0048] The punch body 4 is provided with a punch cavity 7. When the third measuring sleeve 17 is inserted into the punch cavity 7, it can slide freely, and the gap between the outer side wall of the third measuring sleeve 17 and the inner wall of the punch cavity 7 is less than 0.02 mm;

[0049] After the first mounting sleeve 21 is inserted into the first measuring sleeve 12, it can slide freely, and the gap between the outer side wall of the first mounting sleeve 21 and the inner side wall of the first measuring sleeve 12 is less than 0.02 mm;

[0050] After the second mounting sleeve 22 is inserted into the second measuring sleeve 13, it can slide freely, and the gap between the outer side wall of the second mounting sleeve 22 and the inner side wall of the second measuring sleeve 13 is less than 0.02 mm.

[0051] The technical effects achieved by this embodiment are as follows: The die measuring sleeve 2, the punch measuring sleeve 5, the calibration sleeve 8, the displacement sensor 3 and the display mechanism cooperate with each other. During the centering process, the offset between the die cavity and the punch cavity can be intuitively observed by using the display mechanism, so as to facilitate the rapid adjustment of their concentricity; during the use process, the concentricity of the punch and die cavities of the cold heading machine can be adjusted simply, stably and reliably. During the adjustment process, traditional manual tools are not required, the operation is simple, the requirements for operators are low, the precise centering of the punch and die cavities can be quickly realized, and the effect is good after actual application.

[0052] Embodiment 2

[0053] As Figures 1 to 9 shown, another auxiliary tool for centering the punch and die cavities of a cold heading machine provided in this embodiment has a structure including all the contents of Embodiment 1, and only the different parts will be described below.

[0054] In this embodiment, the display mechanism includes a mounting base and a plurality of displays 11. The plurality of displays 11 are all mounted on the mounting base. The displays 11 are arranged in one-to-one correspondence with the displacement sensors 3. Each displacement sensor 3 is connected to a display 11, and the display 11 is used to display the reading of the displacement sensor 3 connected to it.

[0055] In this embodiment, it should be noted that, as Figure 6 shown, the mounting base includes a base 9 and a mounting plate 10. The base 9 is horizontally arranged, the mounting plate 10 is inclined, the bottom end of the mounting plate 10 is connected to the base 9, the included angle between the mounting plate 10 and the base 9 is less than 90°, the included angle between the mounting plate 10 and the base 9 is preferably 30° to 60°, and the display 11 is arranged on the upward-facing surface of the mounting plate 10; the base 9 is plate-shaped, the middle part of the base 9 is hollowed out, and the displacement sensor 3 is arranged on the mounting plate 10.

[0056] The technical effects achieved in this embodiment are as follows: The entire display mechanism has a simple structure. The display 11 and the displacement sensor 3 are arranged in one-to-one correspondence, which can intuitively display the readings of the displacement sensors 3 at various positions, thereby facilitating the adjustment of the orientation between the punch and the die during the centering operation, and then quickly and accurately completing the centering operation between the punch cavity and the die cavity.

[0057] Embodiment 3

[0058] As Figures 1 to 9 shown, another auxiliary tool for centering the punch and die cavities of a cold heading machine provided in this embodiment has a structure including all the contents of Embodiment 2. Only the different parts will be described below.

[0059] In this embodiment, the measuring hole 16 is a round hole. Four measuring holes 16 are provided on the side wall of the second measuring sleeve 13, and the four measuring holes 16 are arranged in a circular array along the axis of the second measuring sleeve 13;

[0060] The display mechanism includes four displays 11. The four displays 11 are all arranged on the mounting plate 10, and the four displays 11 are symmetrically distributed in pairs in the four directions of up, down, left, and right.

[0061] In this embodiment, it should be noted that as Figure 1 、 Figure 2 、 Figure 4 and Figure 7 shown, a plurality of planes are provided on the outer side wall of the second measuring sleeve 13. The planes are arranged in one-to-one correspondence with the measuring holes 16, and each measuring hole 16 is located in a plane, thereby facilitating the installation of the displacement sensor 3.

[0062] Furthermore, the usage method and principle of the entire tool are as follows:

[0063] First, perform equipment installation, cable connection, and debugging of the displacement sensor 3. Check and confirm that the four displacement sensors 3 correspond to the corresponding displays 11, and adjust the readings corresponding to the displacement of the probe extension directions of the four displacement sensors 3 to positive values;

[0064] Secondly, perform calibration work; insert the calibration sleeve 8 into the die measuring sleeve 2 and adjust it to a suitable contact position. As Figure 4 and Figure 5 shown, at this moment, readings are displayed on the four small displays 11, and the readings are set to zero;

[0065] Then, take out the calibration sleeve 8 and perform the centering operation; start the cold heading machine slowly, move the punch body 4 to a position away from the die body 1 to create space for operation. Insert the first measuring sleeve 12 of the die measuring sleeve 2 into the die cavity 6, and after inserting the third measuring sleeve 17 of the punch measuring sleeve 5 into the punch cavity 7, start the cold heading machine slowly and move the punch measuring sleeve 5 to a suitable measuring position so that the fourth measuring sleeve 18 is inserted into the second measuring sleeve 13. At this moment, read the reading of the display 11 on the mounting plate 10. If the reading of the display 11 in a certain direction is greater than zero, it indicates that there is a difference in the concentricity of the punch and die in this direction, and the installation position of the punch cavity 7 needs to be adjusted repeatedly to reduce this value to close to zero (less than 0.02 mm). For example, if the reading of the upper display is 0.8 mm, the punch cavity needs to be moved upward, and so on, until the readings of all 4 small displays are close to zero (less than 0.02 mm). At this moment, the punch and die cavities maintain good concentricity, and the centering operation is completed.

[0066] The technical effect achieved by this embodiment is that the usage method of the entire tool is simple to operate, facilitating the quick, efficient, and accurate centering of the punch and die cavities.

[0067] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

[0068] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

Claims

1. An auxiliary tool for centering the cavity of the punch and die of a cold heading machine, characterized in that It includes a concave die measuring sleeve (2), a convex die measuring sleeve (5), a calibration sleeve (8), a displacement sensor (3) and a display mechanism. The concave die measuring sleeve (2) includes a first measuring sleeve (12) and a second measuring sleeve (13). Both the first measuring sleeve (12) and the second measuring sleeve (13) are cylindrical. The first measuring sleeve (12) and the second measuring sleeve (13) are coaxially arranged, and one end of the first measuring sleeve (12) is connected to one end of the second measuring sleeve (13). A plurality of measuring holes (16) are provided on the side wall of the second measuring sleeve (13). The measuring holes (16) are arranged along the radial direction of the second measuring sleeve (13), and the plurality of measuring holes (16) are respectively arranged annularly along the axis of the second measuring sleeve (13). One displacement sensor (3) is provided in each of the measuring holes (16), and the displacement sensor (3) is connected to the display mechanism. The convex die measuring sleeve (5) includes a third measuring sleeve (17) and a fourth measuring sleeve (18). Both the third measuring sleeve (17) and the fourth measuring sleeve (18) are cylindrical. The third measuring sleeve (17) and the fourth measuring sleeve (18) are coaxially arranged, and one end of the third measuring sleeve (17) is connected to one end of the fourth measuring sleeve (18). The calibration sleeve (8) includes a first mounting sleeve (21) and a second mounting sleeve (22). Both the first mounting sleeve (21) and the second mounting sleeve (22) are cylindrical. The first mounting sleeve (21) and the second mounting sleeve (22) are coaxially arranged, and one end of the first mounting sleeve (21) is connected to one end of the second mounting sleeve (22). The outer diameter of the first measuring sleeve (12) is mutually adapted to the inner diameter of the concave die body (1). The inner diameter of the second measuring sleeve (13) is mutually adapted to the outer diameter of the fourth measuring sleeve (18). The outer diameter of the third measuring sleeve (17) is mutually adapted to the inner diameter of the convex die body (4). And the inner diameter of the first measuring sleeve (12) is mutually adapted to the outer diameter of the first mounting sleeve (21). The inner diameter of the second measuring sleeve (13) is mutually adapted to the outer diameter of the second mounting sleeve (22).

2. The auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, wherein, The display mechanism includes a mounting seat and a plurality of displays (11). The plurality of displays (11) are all mounted on the mounting seat. The displays (11) are arranged in one-to-one correspondence with the displacement sensors (3). Each displacement sensor (3) is connected to one display (11).

3. The auxiliary tool for centering the cold heading machine punch and die cavity according to claim 2, characterized in that, The mounting seat includes a base (9) and a mounting plate (10). The base (9) is horizontally arranged. The mounting plate (10) is inclined. The bottom end of the mounting plate (10) is connected to the base (9). The displacement sensor (3) is arranged on the mounting plate (10).

4. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 3, characterized in that, Four measuring holes (16) are provided on the side wall of the second measuring sleeve (13). The four measuring holes (16) are respectively arranged in an annular array along the axis of the second measuring sleeve (13). The display mechanism includes four displays (11). The four displays (11) are all arranged on the mounting plate (10).

5. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, characterized in that, A plurality of planes are provided on the outer side wall of the second measuring sleeve (13), and the planes are arranged in one-to-one correspondence with the measuring holes (16), and each of the measuring holes (16) is located in one of the planes.

6. An auxiliary tool for centering the cavity of the punch and die of a cold heading machine according to claim 1, characterized in that The concentricity between the first measuring sleeve (12) and the second measuring sleeve (13) is less than 0.01 mm; The concentricity between the third measuring sleeve (17) and the fourth measuring sleeve (18) is less than 0.01 mm; The concentricity between the first mounting sleeve (21) and the second mounting sleeve (22) is less than 0.01 mm.

7. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, characterized in that, A die cavity (6) is provided in the die body (1). When the first measuring sleeve (12) is inserted into the die cavity (6), the gap between the outer side wall of the first measuring sleeve (12) and the inner side wall of the die cavity (6) is less than 0.02 mm; When the fourth measuring sleeve (18) is inserted into the second measuring sleeve (13), the gap between the outer side wall of the fourth measuring sleeve (18) and the inner side wall of the second measuring sleeve (13) is less than 0.02 mm; A punch cavity (7) is provided in the punch body (4). When the third measuring sleeve (17) is inserted into the punch cavity (7), the gap between the outer side wall of the third measuring sleeve (17) and the inner wall of the punch cavity (7) is less than 0.02 mm.

8. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, characterized in that, After the first mounting sleeve (21) is inserted into the first measuring sleeve (12), the gap between the outer side wall of the first mounting sleeve (21) and the inner side wall of the first measuring sleeve (12) is less than 0.02 mm; After the second mounting sleeve (22) is inserted into the second measuring sleeve (13), the gap between the outer side wall of the second mounting sleeve (22) and the inner side wall of the second measuring sleeve (13) is less than 0.02 mm.

9. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, characterized in that, The accuracy of the displacement sensor (3) is 0.01 mm, and the measuring range of the displacement sensor (3) is 5 mm.

10. An auxiliary tool for centering the convex and concave die cavities of a cold heading machine according to claim 1, characterized in that, The die measuring sleeve (2), the punch measuring sleeve (5) and the calibration sleeve (8) are all made of die steel.

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