A cold header clamp table position calibration tool and calibration method

Abstract

The application discloses a cold header clamp table position calibration tool and a calibration method, which comprise a frame body and a taper hole positioning sleeve. The frame body comprises a fixed plate and a plurality of cylinders. The cylinders are inserted into a cold header concave die cavity to realize coaxial reference positioning. The top of the fixed plate is provided with a second through hole corresponding to a clamp fixed pin. The taper hole positioning sleeve is arranged in the second through hole. The two ends of each taper hole positioning sleeve are fixed to the fixed plate through nuts. After the nuts are loosened, the taper hole positioning sleeve can slide in the direction through the second through hole. The inner hole of the taper hole positioning sleeve is divided into a front taper guide section and a rear cylindrical positioning section. The large hole end of the taper guide section faces the clamp table of the cold header, and the small hole end is connected with the hole diameter of the cylindrical positioning section. The cold header downtime debugging time can be reduced, the effective production of the equipment can be effectively improved, the calibration of different specifications of products of the same type of multi-station cold header can be adapted, the early investment cost is low, the effect is quick, the tool purchase, storage and loss cost are greatly reduced.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle component manufacturing technology, specifically to a cold heading machine clamp position calibration tool and calibration method. Background Technology

[0002] In the high-speed cold heading production of precision parts for new energy vehicles, the blank is fed into the die cavity by a feeding mechanism, where it undergoes plastic forming under the pressure of the punch. After forming, the blank is ejected outward by the die ejection mechanism and then transferred to the next station by the clamping assembly. Therefore, the coaxiality and concentricity between the center of the clamping jaws and the die cavity hole must be controlled within 0.1mm. If the concentricity exceeds the standard, batch production failures such as blank slippage, workpiece extrusion deformation, punch-clamp collision, and die breakage will occur, significantly increasing the scrap rate of parts and the cost of die wear.

[0003] The current mainstream clamping table position calibration method in the industry has the following drawbacks:

[0004] After installing the clamping jaws and die, the working angle of the cold heading machine is adjusted to a specific angle. The concentricity of the clamping jaw center and the die hole is checked. This requires the operator to enter the die working area and observe and analyze it visually. This area contains reciprocating moving components such as punches, ejector mechanisms, and moving clamps. Under conditions such as equipment misstart, safety protection device failure, or sudden movement of the transmission mechanism, personal injury such as squeezing or impact can easily occur. In addition, this method requires the manufacture of inspection round bars of a specific diameter. Enterprises need to customize multiple sets of inspection round bars with different outer diameters according to different specifications of dies on the production line. The processing of round bars requires precision turning and grinding processes, with a long processing cycle for each piece. The stocking of multiple specifications ties up a large amount of procurement funds, and the classification, storage, and management of various round bars are cumbersome, and problems such as loss, mixing, and dimensional wear and failure are prone to occur, further increasing the daily operation and maintenance costs.

[0005] The existing method indirectly measures the position of the clamping platform by checking the state of the clamping jaws. Concentricity is judged by inspecting the round bar simultaneously penetrating the clamping jaws and the die cavity. However, the clamping jaws themselves have dimensional deviations such as machining tolerances, long-term wear, and deformation during disassembly and assembly. These deviations will be added to the concentricity test results, which cannot truly reflect the actual installation position of the clamping platform body. This can easily mislead operators and cause the clamping platform to be improperly calibrated.

[0006] Because long-term high-speed impact and vibration of the equipment can cause the clamping table to shift position, the existing calibration method has no standardized benchmark retention means. After each shift, the entire visual verification process must be repeated, which cannot quickly reproduce the original standard concentric position. The equipment shutdown and debugging frequency is high, which reduces the production line capacity. Using the traditional calibration method, a single complete calibration takes a long time and requires a high level of worker experience. Summary of the Invention

[0007] Therefore, the present invention provides a tool and method for calibrating the position of the clamping table of a cold heading machine, in order to solve one or more technical problems existing in the prior art.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] In a first aspect, a tool for calibrating the position of a clamping table in a cold heading machine includes a frame body and multiple sets of tapered hole positioning sleeves;

[0010] The frame body includes a fixed plate and several cylinders. The cylinders are used to be inserted into the cavity of the cold heading machine in a clearance fit to achieve coaxial reference positioning. The top of the fixed plate has a number of second through holes that correspond one-to-one with the clamping pins of the clamping table of the cold heading machine along the length direction of the fixed plate.

[0011] The conical hole positioning sleeves are inserted one-to-one into the second through hole. Each conical hole positioning sleeve is fixed to the fixing plate at both ends by nuts. The nuts are respectively attached to the inner and outer sides of the fixing plate. After the nuts are loosened, the conical hole positioning sleeve can slide along the direction of penetrating the second through hole. The inner hole of the conical hole positioning sleeve is divided into a front conical guide section and a rear cylindrical positioning section along the axial direction. The diameter of the conical guide section gradually decreases from the outside to the inside. The large hole end of the conical guide section faces the clamping table of the cold heading machine, and the small hole end connects with the diameter of the cylindrical positioning section.

[0012] Furthermore, the bottom of the fixing plate is provided with a plurality of first through holes, and bolts are inserted into the first through holes, and the cylinder is connected to the fixing plate by bolts.

[0013] Furthermore, the cylinder consists of two solid cylinders, and the outer diameter of the cylinders forms a fitting clearance of 0.02mm-0.04mm with the inner hole of the die cavity of the cold heading machine.

[0014] Furthermore, the cylinder is made of 45 steel.

[0015] Furthermore, there are 10 tapered hole positioning sleeves.

[0016] Furthermore, the tapered hole positioning sleeve is made of wear-resistant alloy steel.

[0017] In a second aspect, a calibration method using any of the cold heading machine clamp table position calibration tools described in the first aspect includes a station calibration step, wherein the station calibration step includes:

[0018] Step S201: Adjust the cold heading machine to the calibration working angle, take out the calibrated calibration tool, and insert the cylinder into the cavity of the cold heading machine for positioning;

[0019] Step S202: Apply colorant evenly to the inner wall of the tapered guide section of the tapered hole positioning sleeve;

[0020] Step S203: Push the calibration tool deep into the die cavity of the cold heading machine so that the clamp fixing pin first enters the front tapered guide section of the tapered hole positioning sleeve;

[0021] Step S204: Observe the traces of paint being rubbed off on the inner wall of the conical guide section to determine the direction of the clamp table offset; operate the adjusting component of the cold heading machine clamp drive mechanism to make slight adjustments to the clamp table up and down and left and right.

[0022] Step S205: Repeatedly push the calibration tool, observe the scratches, and adjust the position of the clamping platform until all clamp fixing pins can smoothly enter the rear cylindrical positioning section of the corresponding conical hole positioning sleeve without jamming. The concentric calibration of the clamping platform is completed.

[0023] Furthermore, it also includes a tool reference calibration step, which is a preliminary step to the workstation calibration step. The tool reference calibration step includes:

[0024] Step S101: Adjust the cold heading machine to the calibration-specific working angle, and push the two solid cylinders of the calibration tool into the cold heading machine cavity to complete the positioning;

[0025] Step S102: Loosen the nuts at both ends of all the tapered hole positioning sleeves so that each tapered hole positioning sleeve can slide freely in the second through hole to adjust its position;

[0026] Step S103: Push the calibration tool deep into the cavity of the cold heading machine so that the clamping pin of the cold heading machine clamping table extends into the cylindrical positioning section of the inner hole of the tapered hole positioning sleeve.

[0027] Step S104: Tighten the nuts at both ends of the conical hole positioning sleeve, and apply paint to the contact position between the nuts and the frame body to form a marking line;

[0028] Step S105: After all the taper hole positioning sleeves at all workstations have been calibrated, the calibration tool is pulled out of the die cavity of the cold heading machine.

[0029] Compared with the prior art, this application has at least the following beneficial effects:

[0030] 1. The main frame of this invention uses two solid cylinders to quickly position itself by fitting with the die cavity through a gap. It is equipped with an adjustable tapered hole positioning sleeve with a tapered guide section, eliminating the need for repeated disassembly and assembly and comparison of multiple specifications of inspection bars. Using this tool can reduce the downtime for cold heading machine debugging, effectively improve the efficient production of the equipment, and a single tooling set can be adapted to the calibration of different specifications of products on a multi-station cold heading machine of the same model. No additional auxiliary tooling is required, resulting in low initial investment costs, quick implementation and effectiveness, and a significant reduction in tooling procurement, storage and loss costs.

[0031] 2. This tool abandons the traditional method of indirect measurement relying on clamp jaws, avoiding measurement interference caused by clamp jaw processing and wear; the position deviation of the clamping table after traditional calibration can only be controlled within 0.3 mm to 0.5 mm, while this tool can stably control the position deviation within 0.1 mm, reducing failures such as clamping failure, die collision, and workpiece scrap.

[0032] 3. Traditional calibration requires operators to extend their arms into the mold working area for extended periods, posing a risk of squeezing and impact injuries. This tool relies on external frame push-pull operation, eliminating the need for personnel to enter the dangerous area of ​​the mold 95% of the time. This significantly reduces the probability of personal injury caused by equipment malfunctions or safety protection failures, thus greatly enhancing operational safety.

[0033] 4. This tool adopts a purely mechanical structure, which is stable in operation, easy to maintain, durable in mechanical structure, and simple and convenient to disassemble and maintain. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Figure 1 A first-view reference diagram of a cold heading machine clamp table position calibration tool provided in this application embodiment;

[0037] Figure 2 A second-view reference diagram for using a cold heading machine clamp table position calibration tool provided in this application embodiment;

[0038] Figure 3 A third-view reference diagram of a cold heading machine clamp table position calibration tool provided in this application embodiment;

[0039] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of section AA;

[0040] Figure 5A fourth-view reference diagram for using a cold heading machine clamp table position calibration tool provided in this application embodiment;

[0041] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB section;

[0042] Figure 7 A side view of the conical hole positioning sleeve of a cold heading machine clamp table position calibration tool provided in this application embodiment;

[0043] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the CC section;

[0044] Figure 9 This application provides a schematic diagram of the fixing plate structure of a cold heading machine clamp table position calibration tool.

[0045] Figure 10 This is a schematic cross-sectional view of a cold heading machine clamp position calibration tool provided in an embodiment of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Frame body; 2. Fixing plate; 3. Cylinder; 4. First through hole; 5. Second through hole; 6. Tapered hole positioning sleeve; 7. Clamp fixing pin; 8. Bolt; 9. Nut. Detailed Implementation

[0048] The following specific embodiments illustrate the implementation of this application. 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 only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] like Figures 1 to 10 As shown, this application provides a cold heading machine clamping table position calibration tool, which includes a frame body 1 and multiple sets of conical hole positioning sleeves 6. Preferably, there are 10 sets of conical hole positioning sleeves 6.

[0051] The main frame 1 includes a fixing plate 2 and two solid cylinders 3. The cylinders 3 are inserted into the die cavity of the cold heading machine with a clearance fit to achieve coaxial reference positioning. The fixing plate 2 has an inverted U-shaped plate structure, and its bottom end (i.e., the end closest to the die cavity of the cold heading machine) has two first through holes 4. The two first through holes 4 are arranged at intervals along the length of the fixing plate 2. The two solid cylinders 3 are fixedly connected to the fixing plate 2 by bolts 8. The bolts 8 pass through the first through holes 4 and are screwed to the ends of the cylinders 3. Preferably, the cylinders 3 are made of 45# steel, and their outer diameter forms a fit clearance of 0.02mm-0.04mm with the inner hole of the die cavity of the cold heading machine to ensure that the cylinders 3 can slide smoothly into the die cavity while maintaining a precise positioning fit and preventing positional wobble due to excessive clearance.

[0052] The top end of the fixing plate 2 (i.e. the end away from the cold heading machine cavity) has a plurality of spaced second through holes 5 along its length. Preferably, the second through holes 5 are 10 round holes, and the positions of the 10 second through holes 5 correspond one-to-one with the clamp fixing pins 7 of the 10 stations of the cold heading machine.

[0053] In this embodiment, ten conical hole positioning sleeves 6 are respectively inserted into the corresponding second through holes 5. Each conical hole positioning sleeve 6 is a cylindrical sleeve structure, the outer diameter of which matches the inner diameter of the second through hole 5, and the conical hole positioning sleeve 6 can slide axially within the second through hole 5. Both ends of each conical hole positioning sleeve 6 extend out from the inner and outer sides of the fixing plate 2 and are fixed to the fixing plate 2 by two nuts 9, which respectively abut against the inner and outer sides of the fixing plate 2. After loosening the nuts 9, the position of the conical hole positioning sleeve 6 can be adjusted axially along the second through hole 5; after tightening the nuts 9, the conical hole positioning sleeve 6 is locked onto the fixing plate 2.

[0054] Preferably, the tapered hole positioning sleeve 6 is made of wear-resistant alloy steel and undergoes overall quenching treatment to ensure that its surface hardness is not lower than HRC55, so as to ensure that the inner wall of the tapered hole will not be worn by the clamp fixing pin 7 during long-term use and lose its accuracy. The inner hole of the tapered hole positioning sleeve 6 is divided into a front tapered guide section and a rear cylindrical positioning section along the axial direction. The diameter of the tapered guide section gradually decreases from the outside to the inside, and its small end connects with the diameter of the cylindrical positioning section. The inner diameter of the cylindrical positioning section is adapted to the outer diameter of the cold heading machine clamp fixing pin 7. The two are precisely matched, and when the clamp fixing pin 7 is fully inserted into the cylindrical positioning section, the concentricity deviation of the two reflects the actual position deviation of the clamp table.

[0055] The assembly method in this embodiment is as follows:

[0056] First, insert two solid cylinders 3 into the two first through holes 4 of the fixing plate 2 respectively, and tighten them with bolts 8 to fix the solid cylinders 3 to the fixing plate 2. Then, insert ten conical hole positioning sleeves 6 into the ten second through holes 5 of the fixing plate 2 respectively, and screw nuts 9 on both ends of each conical hole positioning sleeve 6. At this time, the nuts 9 are not tightened, allowing the conical hole positioning sleeve 6 to slide freely in the second through hole 5. The initial assembly of the calibration tool is now complete.

[0057] In a further embodiment, a calibration method for a cold heading machine clamping table position calibration tool is provided, using the calibration tool in the above embodiment, including a tool reference calibration step and a workstation calibration step.

[0058] When installing a new cold heading machine for the first time after it leaves the factory, or when the cold heading machine needs to be recalibrated after a major overhaul, perform the following tool calibration steps:

[0059] Step S101: Adjust the cold heading machine to the dedicated calibration working angle, align the two cylinders 3 of the assembled calibration tool with the inner hole of the die cavity of the cold heading machine, and push them in smoothly along the axial direction so that the cylinders 3 are completely inserted into the die cavity. Use the fitting clearance of 0.02mm to 0.04mm to achieve precise positioning of the calibration tool relative to the die cavity.

[0060] Step S102: Loosen the nuts 9 at both ends of all the tapered hole positioning sleeves 6 so that each tapered hole positioning sleeve 6 can slide freely along the axial direction in the corresponding second through hole 5, so as to adjust the position later.

[0061] Step S103: Push the calibration tool deep into the die cavity of the cold heading machine by hand or with an auxiliary push rod until the ten clamping pins 7 on the clamping table of the cold heading machine are inserted into the inner holes of the corresponding tapered hole positioning sleeves 6. Since the tapered hole positioning sleeves 6 are not yet locked at this time, when the clamping pins 7 enter the tapered hole positioning sleeves 6, they will push the tapered hole positioning sleeves 6 in the second through hole 5 to produce a slight axial sliding, so that the position of the tapered hole positioning sleeves 6 automatically adapts to the actual center position of the clamping pins 7. When the clamping pins 7 are fully inserted into the cylindrical positioning section of the tapered hole positioning sleeves 6 and form a precise fit with the cylindrical positioning section, it indicates that the tapered hole positioning sleeves 6 have reached the concentric position with the clamping pins 7.

[0062] Step S104: Keep the calibration tool in this position and tighten the nuts 9 at both ends of the conical hole positioning sleeve 6 in sequence to fix the conical hole positioning sleeve 6 on the fixing plate 2. Then, paint is applied to the contact position between each nut 9 and the surface of the fixing plate 2 to form a clear marking line. This marking line serves as a quick reset reference for subsequent repeated calibration. When the clamping table shifts position after the equipment has been used for a period of time, the operator only needs to loosen the nuts 9 of the conical hole positioning sleeve 6 and then tighten them back to the marking line position to quickly restore the original setting position of the conical hole positioning sleeve 6 on the fixing plate 2 without repeating the complete calibration process from steps S101 to S103.

[0063] Step S105: After all the tapered hole positioning sleeves 6 have been calibrated and locked, the calibration tool is smoothly pulled out of the die cavity of the cold heading machine, and the tool reference calibration is completed. At this time, the calibration tool is a special calibration tool corresponding to the standard concentric position of the clamping table of the cold heading machine.

[0064] When the cold heading machine has been in operation for a long time, the clamping table position may shift due to high-speed impact and vibration, requiring routine calibration and maintenance. The following calibration steps should be performed:

[0065] Step S201: Adjust the cold heading machine to the calibration-specific working angle, take out the calibration tool that has been calibrated in step S105, and insert the cylinder 3 back into the die cavity of the cold heading machine to complete the tooling positioning.

[0066] Step S202: Apply a layer of colorant evenly to the inner wall of the front conical guide section of the 10 conical hole positioning sleeves 6 using a marker or brush, ensuring that the inner conical surface of the conical guide section is fully covered, the pigment layer is of uniform thickness and does not block the inner hole of the conical guide section.

[0067] Step S203: Smoothly push the calibration tool into the depth of the die of the cold heading machine so that the clamp fixing pin 7 first enters the front tapered guide section of the tapered hole positioning sleeve 6; since the clamping table may have deviated from the standard position at this time, the clamp fixing pin 7 will not directly enter the rear cylindrical positioning section, but will first contact the inner wall of one side of the tapered guide section.

[0068] Step S204: Observe the marks left by friction on the inner wall of the tapered guide section to determine the direction of the clamping platform's offset. For example, if the upper half of the paint in the inner hole of the tapered guide section is wiped off while the lower half remains intact, it indicates that the clamp fixing pin 7 is installed too high, meaning the clamping platform is offset upwards as a whole. If the paint on the left side is wiped off, it indicates that the clamping platform is offset to the left. After determining the offset direction of the clamping platform based on the location of the scratches, the operator operates the adjusting components in the cold heading machine's clamp drive mechanism to make minor adjustments to the clamping platform in both the up-down and left-right directions.

[0069] Step S205: Repeat steps S203 and S204, i.e., repeatedly push the calibration tool, observe the scratches, and adjust the position of the clamping platform. After each adjustment, wipe off the original pigment layer and reapply, and test again. When all clamp fixing pins 7 can smoothly enter the rear cylindrical positioning section of the corresponding conical hole positioning sleeve 6 without jamming, and there are no obvious traces of unilateral erasure of the pigment layer on the inner wall of each conical guide section, it indicates that the clamping platform has been restored to the concentric position consistent with the standard reference, and the concentric calibration of the clamping platform is completed.

[0070] In a further embodiment, when the clamping table position needs to be recalibrated after a period of production operation, it is not necessary to repeat the complete tool reference calibration process of steps S101 to S103.

[0071] First, observe the paint markings at the contact points between the nut 9 and the fixed plate 2. If the markings are complete and clear, it indicates that the position of the tapered hole positioning sleeve 6 on the fixed plate 2 has not changed. The operator only needs to tighten the nuts 9 at both ends of each tapered hole positioning sleeve 6 to the markings to restore the standard concentric position of the tapered hole positioning sleeve 6 and the clamp fixing pin 7. Then, adjust the position of the clamping table according to the workstation calibration procedures in steps S201 to S205.

[0072] If the paint markings become blurred or the position of the cone hole positioning sleeve 6 changes unexpectedly after prolonged use or maintenance, the tool reference calibration process needs to be repeated, i.e., steps S101 to S105, to re-establish the standard reference and repaint the paint markings.

[0073] This marker line reset application method significantly shortens the preparation time for repeated calibrations, avoids the need to recalibrate the tool reference for each calibration, and significantly improves daily maintenance efficiency.

[0074] The storage media described in the embodiments of the present invention are intended to include, but are not limited to, these and any other suitable types of memory.

[0075] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this invention can be implemented using a combination of hardware and software. When applied as software, the corresponding functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0076] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A tool for calibrating the position of a clamping table in a cold heading machine, characterized in that, It includes the frame body (1) and multiple sets of tapered hole positioning sleeves (6); The frame body (1) includes a fixing plate (2) and several cylinders (3). The cylinders (3) are used to be inserted into the cold heading machine cavity in a clearance fit to achieve coaxial reference positioning. The top of the fixing plate (2) is provided with a number of second through holes (5) that correspond one-to-one with the clamp fixing pins (7) of the cold heading machine clamp table. The conical hole positioning sleeves (6) are inserted one by one into the second through hole (5). The two ends of each conical hole positioning sleeve (6) are fixed to the fixing plate (2) by nuts (9). The nuts (9) are respectively attached to the inner and outer sides of the fixing plate (2). After the nuts (9) are loosened, the conical hole positioning sleeves (6) can slide along the direction of penetrating the second through hole (5). The inner hole of the conical hole positioning sleeve (6) is divided into a front conical guide section and a rear cylindrical positioning section along the axial direction. The diameter of the conical guide section gradually decreases from the outside to the inside. The large hole end of the conical guide section faces the clamping table of the cold heading machine, and the small hole end is connected to the diameter of the cylindrical positioning section.

2. The cold heading machine clamp table position calibration tool according to claim 1, characterized in that, The bottom of the fixing plate (2) is provided with a plurality of first through holes (4), and bolts (8) are inserted into the first through holes (4). The cylinder (3) is connected to the fixing plate (2) by bolts (8).

3. The cold heading machine clamp table position calibration tool according to claim 2, characterized in that, The cylinder (3) consists of two solid cylinders (3), and the outer diameter of the cylinder (3) forms a fitting clearance of 0.02mm-0.04mm with the inner hole of the die cavity of the cold heading machine.

4. The cold heading machine clamp table position calibration tool according to claim 3, characterized in that, The cylinder (3) is made of No. 45 steel.

5. The cold heading machine clamp table position calibration tool according to claim 1, characterized in that, There are 10 tapered hole positioning sleeves (6).

6. The cold heading machine clamp table position calibration tool according to claim 4, characterized in that, The tapered hole positioning sleeve (6) is made of wear-resistant alloy steel.

7. A calibration method using the cold heading machine clamp table position calibration tool as described in any one of claims 1-6, characterized in that, The workstation calibration step includes: Step S201: Adjust the cold heading machine to the calibration working angle, take out the calibration tool that has been calibrated, and insert the cylinder (3) into the cavity of the cold heading machine for positioning; Step S202: Apply colorant evenly to the inner wall of the tapered guide section of the tapered hole positioning sleeve (6); Step S203: Push the calibration tool deep into the die of the cold heading machine so that the clamp fixing pin (7) first enters the front tapered guide section of the tapered hole positioning sleeve (6); Step S204: Observe the traces of paint being rubbed off on the inner wall of the conical guide section to determine the direction of the clamp table offset; operate the adjusting component of the cold heading machine clamp drive mechanism to make slight adjustments to the clamp table up and down and left and right. Step S205: Repeatedly push the calibration tool, observe the scratches, and adjust the position of the clamping platform until all clamp fixing pins (7) can smoothly enter the rear cylindrical positioning section of the corresponding conical hole positioning sleeve (6) without jamming. The concentric calibration of the clamping platform is completed.

8. The calibration method for the cold heading machine clamp table position calibration tool according to claim 7, characterized in that, It also includes a tool reference calibration step, which is a prerequisite step for the workstation calibration step. The tool reference calibration step includes: Step S101: Adjust the cold heading machine to the calibration-specific working angle, and push the two solid cylinders (3) of the calibration tool into the cold heading machine cavity to complete the positioning; Step S102: Loosen the nuts (9) at both ends of all the tapered hole positioning sleeves (6) so that each tapered hole positioning sleeve (6) can slide freely in the second through hole (5) to adjust its position; Step S103: Push the calibration tool deep into the cavity of the cold heading machine so that the clamp fixing pin (7) of the cold heading machine clamp table extends into the cylindrical positioning section of the inner hole of the tapered hole positioning sleeve (6). Step S104: Tighten the nuts (9) at both ends of the conical hole positioning sleeve (6), and apply paint to the contact position between the nuts (9) and the frame body (1) to form a marking line; Step S105: After all the taper hole positioning sleeves (6) at all workstations are calibrated, the calibration tool is pulled out from the die cavity of the cold heading machine.

Images