A cold header for metal working and a method of using the same

Abstract

The present application belongs to the technical field of cold header, especially relates to a cold header for metal processing and a use method thereof; the cold header comprises: a machine base; a plurality of fixed dies which are arranged side by side and equidistantly; a plurality of movable dies which are respectively arranged opposite to one fixed die; a plurality of stamping mechanisms which respectively drive one movable die to stamp in the direction of the corresponding fixed die; a hydraulic control oil circuit which is used for driving the stamping mechanisms to operate; wherein the hydraulic control oil circuit comprises: an oil tank in which hydraulic oil is stored; an oil supply driving assembly which is used for pumping the hydraulic oil in the oil tank; an oil inlet conveying system which is used for conveying the hydraulic oil pumped by the oil supply driving assembly to each stamping mechanism; an oil return conveying pipe fitting which is used for receiving the hydraulic oil discharged by the stamping mechanism and returning to the oil tank; wherein the stamping mechanism is provided with a stamping cavity and a return cavity; through the setting of the hydraulic control oil circuit, the stamping pressure of different stations is respectively controlled, the stamping pressure is ensured, and the finished product rate of the produced metal piece is improved.

Description

A cold heading machine for metal processing and its usage method Technical Field

[0001] This invention belongs to the field of cold heading machine technology, and particularly relates to a cold heading machine for metal processing and its usage method. Background Technology

[0002] A cold heading machine is a mechanical device used for forming metal parts, mainly for manufacturing various standard and non-standard parts. Typically, a cold heading machine uses hydraulic transmission to apply impact or pressure to the metal material, forging it at room temperature to complete plastic deformation, and then shaping the material using a mold cavity. However, the cold heading of a metal part requires multiple processes, such as initial heading, pre-forming, final forming, and diameter reduction. The impact or pressure varies in each process, and if the pressure cannot be accurately controlled, it can easily affect the quality of the formed metal part. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a cold heading machine for metal processing with a simple structure and easy control of the pressure at each workstation, as well as its usage method.

[0004] In view of this, the present invention provides a cold heading machine for metal processing, comprising:

[0005] Base;

[0006] Several fixed molds are arranged side by side and at equal intervals;

[0007] Several moving molds are each positioned opposite a fixed mold;

[0008] Several stamping mechanisms each drive a moving die to stamp in the direction of the corresponding fixed die;

[0009] The hydraulic control circuit is used to drive the stamping mechanism.

[0010] The hydraulic control circuit includes:

[0011] The oil tank contains hydraulic oil.

[0012] The oil supply drive assembly is used to pump the hydraulic oil out of the oil tank;

[0013] The oil inlet delivery system is used to deliver the hydraulic oil pumped out by the oil supply drive component to each stamping mechanism;

[0014] The return oil conveying pipe is used to receive the hydraulic oil discharged by the stamping mechanism and send it back to the oil tank; the stamping mechanism has a stamping chamber and a return chamber.

[0015] In the above technical solution, the oil supply drive component further includes:

[0016] Several oil supply drive components are connected in parallel and connected to the oil inlet pipeline;

[0017] The oil supply drive component includes:

[0018] The delivery pump has its inlet connected to the oil tank.

[0019] The pump output pipe is connected to the outlet of the delivery pump;

[0020] A pump switching valve, one of whose interfaces is connected to the pump output pipe;

[0021] The pumping connection pipe is connected to the second port of the pumping switching valve;

[0022] The pump return line is connected to the third port of the pump switching valve.

[0023] In the above technical solution, the oil inlet delivery system further includes:

[0024] The original pressure conveying component is used to receive the hydraulic oil delivered from the oil supply drive component;

[0025] The pressurization module increases the pressure of the pumped hydraulic oil;

[0026] The pressurized delivery component delivers the pressurized hydraulic oil from the pressurization module to the stamping mechanism to drive its operation.

[0027] In the above technical solution, the pressurization module further includes:

[0028] Several intensifiers, each with a high-pressure chamber, a low-pressure chamber, a reset chamber and an intensifier piston, are arranged side by side in order of increasing intensifier pressure;

[0029] Several low-pressure control valves, one of the ports of each valve is connected to the low-pressure chamber of a corresponding booster via a pipe;

[0030] Several high-pressure control valves, one of the ports of each valve is connected to the high-pressure chamber of a corresponding booster via a pipe;

[0031] The reset control valve has one port that connects the reset chambers of each booster in parallel via pipes.

[0032] In the above technical solution, the original pressure conveying component further includes:

[0033] The original pressure delivery pipeline is used to connect to the output end of the oil supply drive component;

[0034] The return control valve has one port connected to the original pressure conveying pipeline via a pipe, and the second port connected in parallel to the return chamber of the stamping mechanism via a pipe.

[0035] The original pressure reset pipeline is the second interface connecting the original pressure delivery pipeline and the reset control valve.

[0036] The original low-pressure input pipe is connected to the second port on the low-pressure control valve connected to the booster with the lowest boost pressure.

[0037] A proportional pressure control valve is installed on the original pressure delivery pipeline;

[0038] The original pressure high-pressure input pipe is the second interface connecting the original pressure delivery pipeline and the high-pressure control valve.

[0039] In the above technical solution, the pressurized delivery component further includes:

[0040] Several stamping conveying pipe fittings, each fitting connecting the third port of one of the high-pressure control valves to the stamping chamber of a corresponding stamping mechanism;

[0041] In fact, stamped conveyor pipe fittings include:

[0042] The high-pressure output pipe is connected to the second port of the corresponding high-pressure control valve;

[0043] The high-pressure proportional valve is connected to the high-pressure output pipe. The high-pressure proportional valve is either an electro-hydraulic proportional valve or an electro-hydraulic proportional directional valve.

[0044] The flow monitor is connected in series with the high-pressure proportional valve via a pipeline;

[0045] The stamping pressure monitor is connected in series with the flow monitor via a pipeline;

[0046] A stamping check valve is connected in series with a stamping pressure monitor via a pipeline;

[0047] The stamping control valve has one port connected to the stamping check valve via a pipe, and the second port connected to the stamping chamber of the corresponding stamping mechanism via a pipe.

[0048] In the above technical solution, the pressurized delivery component further includes:

[0049] Several pressurization auxiliary fittings, one less than the number of stamping conveying fittings, have one end connected to the high-pressure output pipe on the lower pressurizer and the second interface of the low-pressure control valve on the adjacent higher pressurizer.

[0050] Each pressurization auxiliary fitting includes:

[0051] The pressurization auxiliary pipeline connects the high-pressure output pipe to the low-pressure control valve.

[0052] Several auxiliary proportional valves are installed on the pressurization auxiliary pipeline, and at one end of the high-pressure delivery pipeline;

[0053] Several auxiliary check valves are installed on the pressurization auxiliary pipeline, near the end of the low-pressure control valve.

[0054] In the above technical solution, the return oil delivery pipe fitting further includes:

[0055] The return oil conveying main pipe is connected to the oil tank;

[0056] The return oil pipe connects the third interface of the return control valve to the return oil delivery main pipe.

[0057] Several stamped return oil pipes are respectively connected to the third interface of the corresponding stamped control valve and the return oil delivery main pipe;

[0058] Several low-pressure return oil pipes connect the third interface of the corresponding low-pressure control valve to the main return oil delivery pipe.

[0059] Reset the return oil pipe and connect the third port of the reset control valve to the main return oil delivery pipe;

[0060] The end of the pump return oil pipe is connected to the main return oil delivery pipe.

[0061] Furthermore, the above technical solution also includes:

[0062] The control cabinet contains control circuits and controllers, and has a human-machine interface on the outside.

[0063] The original pressure sensor is installed in the original pressure delivery pipeline;

[0064] The controller receives data from the high-pressure monitor, flow monitor, and stamping pressure monitor to determine whether the hydraulic control circuit is abnormal. At the same time, the controller is programmed to control the delivery pump, pumping switching valve, low-pressure control valve, high-pressure control valve, reset control valve, return control valve, high-pressure proportional valve, stamping control valve, and auxiliary proportional valve.

[0065] The controller is pre-loaded with operating data of the hydraulic control circuit during the processing of different parts;

[0066] The operating data includes the pressure threshold of the original pressure delivery pipeline, and the pressure threshold and flow rate threshold of the hydraulic oil input to the stamping chamber of each stamping mechanism.

[0067] The beneficial effects of this invention are as follows:

[0068] 1. The cold heading machine uses a hydraulic control circuit to separately control the stamping pressure at different stations, ensuring the pressure of each stamping mechanism and improving the yield of the produced metal parts;

[0069] 2. By configuring the oil supply drive component, the delivery pump can be started and stopped infrequently, thus ensuring the service life of the delivery pump and the cold heading machine as a whole. Attached Figure Description

[0070] Figure 1 is a schematic diagram of the structure of the present invention;

[0071] Figure 2 is a schematic diagram of the hydraulic control circuit in this invention;

[0072] The markings in the diagram represent: 1-oil tank, 2-transfer pump, 3-pump switching valve, 4-pump connection pipe, 5-pump return oil pipe, 6-booster, 6a-high pressure chamber, 6b-low pressure chamber, 6c-reset chamber, 7-low pressure control valve, 8-high pressure control valve, 9-reset control valve, 10-original pressure delivery pipeline, 11-return control valve, 12-original pressure reset pipeline, 13-original pressure and low pressure input pipeline, 14-proportional pressure control valve, 15-high pressure output pipe, 16-high pressure proportional valve, 17-flow rate. 18-Pressing pressure monitor, 19-Pressing check valve, 20-Pressing control valve, 21-Pressure auxiliary pipeline, 22-Auxiliary proportional valve, 23-Return oil delivery main pipe, 24-Return oil return pipe, 25-Pressing return oil pipe, 26-Low pressure return oil pipe, 27-Reset return oil pipe, 28-Original pressure sensor, 29-Original pressure high pressure input pipe, 100-Machine base, 101-Fixed die, 102-Moving die, 103-Pressing mechanism, 103a-Pressing chamber, 103b-Return chamber. Detailed Implementation

[0073] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0074] Example 1:

[0075] This embodiment provides a cold heading machine for metal processing, including:

[0076] Base 100;

[0077] Several fixed molds 101 are arranged side by side and at equal intervals;

[0078] Several moving molds 102 are respectively arranged opposite to a fixed mold 101;

[0079] Several stamping mechanisms 103 each drive a moving die 102 to stamp in the direction of the corresponding fixed die 101;

[0080] The hydraulic control circuit is used to drive the stamping mechanism 103.

[0081] The hydraulic control circuit includes:

[0082] Oil tank 1 contains hydraulic oil;

[0083] The oil supply drive assembly is used to pump out the hydraulic oil in the oil tank 1;

[0084] The oil inlet delivery system is used to deliver the hydraulic oil pumped out by the oil supply drive component to each stamping mechanism 103;

[0085] The return oil conveying pipe is used to receive the hydraulic oil discharged from the stamping mechanism 103 and send it back to the oil tank 1; wherein the stamping mechanism 103 has a stamping chamber 103a and a return chamber 103b.

[0086] In this embodiment, the number of fixed dies 101 and moving dies 102 is equal, and the number of stamping mechanisms 103 is equal to the number of moving dies 102. The stamping mechanism 103 is a hydraulic cylinder, which drives the moving die 102 to stamp against the fixed die 101 to complete the cold heading process of metal. The hydraulic oil stored in the oil tank 1 provides the hydraulic power source for driving the stamping mechanism 103. The oil supply drive assembly pumps the hydraulic oil in the oil tank 1 at a certain pressure, and then pressurizes it step by step through the oil inlet delivery system before supplying it to the stamping mechanism 103 that corresponds to the impact pressure. Thus, the supply of hydraulic oil at different pressures can be completed by pumping hydraulic oil through one oil supply drive assembly, meeting the needs of different stamping mechanisms 103. The return oil delivery pipe collects the returned hydraulic oil and delivers it back to the oil tank 1. In order to ensure the purity and good performance of the hydraulic oil, an oil cooler and a filter can be installed at the end of the return oil delivery pipe connected to the oil tank 1.

[0087] Example 2:

[0088] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0089] The oil supply drive assembly includes:

[0090] Several oil supply drive components are connected in parallel and connected to the oil inlet pipeline;

[0091] The oil supply drive component includes:

[0092] The inlet of the transfer pump 2 is connected to the oil tank 1.

[0093] The pump output pipe is connected to the outlet end of the delivery pump 2;

[0094] Pumping switching valve 3, one of its ports is connected to the pumping output pipe;

[0095] Pumping connection pipe 4 is connected to the second port of pumping switching valve 3;

[0096] The pump return pipe 5 is connected to the third port of the pump switching valve 3.

[0097] In this embodiment, multiple parallel oil supply drive components are provided, which can supply multiple raw pressure oils with different pressures and flow rates, thereby ensuring smooth driving of the stamping mechanism 103 during different operations. It should be noted that the raw pressure mentioned throughout the text refers to the pressure obtained solely through the oil supply drive components.

[0098] The delivery pump 2 is a unidirectional variable hydraulic pump, which can change the original pressure and flow rate of the hydraulic oil, and deliver hydraulic oil with corresponding pressure and flow rate in different actions of the stamping mechanism 103. The pumping switching valve 3 is a three-way solenoid valve. Driven by the pumping switching valve 3, it determines whether the hydraulic oil pumped by the delivery pump 2 enters the pumping connection pipe 4 or the pumping return pipe 5.

[0099] The hydraulic oil entering the pumping connection pipe 4 will eventually enter the oil inlet delivery system, and the hydraulic oil entering the pumping return oil pipe 5 will eventually enter the return oil delivery pipe. The switching is achieved by the action of the pumping switching valve 3, thereby avoiding frequent start-stop of the delivery pump 2, which would affect the service life of the delivery pump 2. That is, when the stamping mechanism 103 does not need all delivery pumps 2 to pump hydraulic oil, it can deliver the hydraulic oil pumped by one or several delivery pumps 2 to the return oil delivery pipe, and finally flow back to the oil tank 1.

[0100] Example 3:

[0101] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0102] The oil inlet delivery system includes:

[0103] The original pressure conveying component is used to receive the hydraulic oil delivered from the oil supply drive component;

[0104] The pressurization module increases the pressure of the pumped hydraulic oil;

[0105] The pressurized delivery component delivers the pressurized hydraulic oil from the pressurization module to the stamping mechanism 103 to drive the stamping mechanism 103 to operate.

[0106] In this embodiment, the original pressure conveying assembly delivers hydraulic oil, pressurized by the oil supply drive component, to the pressurizing module and the stamping assembly. The pressurizing module is used to increase the pressure of the delivered original pressure hydraulic oil to obtain hydraulic oil with the pressure required by different stamping mechanisms 103. The pressurizing conveying assembly delivers hydraulic oil with different pressures pressurized by the pressurizing module to the corresponding stamping mechanism 103, thereby ensuring that the pressure of the stamping mechanism 103 reaches the stamping standard during stamping, thus ensuring the quality of the obtained metal parts.

[0107] Example 4:

[0108] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0109] The pressurization module includes:

[0110] Several boosters 6, each having a high-pressure chamber 6a, a low-pressure chamber 6b, a reset chamber 6c and a booster piston, and the boosters 6 are arranged side by side in order to increase the boost pressure;

[0111] Several low-pressure control valves 7, one of the ports of each valve is connected to the low-pressure chamber 6b of a corresponding booster 6 via a pipe;

[0112] Several high-pressure control valves 8, one of the ports of each valve is connected to the high-pressure chamber 6a of a corresponding booster 6 via a pipe;

[0113] The reset control valve 9 has one port that connects the reset chambers 6c of each booster 6 in parallel via pipes.

[0114] In this embodiment, the booster 6 achieves pressure boosting by utilizing the ratio of the different pressure-bearing cross-sectional areas of the high-pressure chamber 6a and the low-pressure chamber 6b. It can be either a booster cylinder or a hydraulic booster 6. The volume of the high-pressure chamber 6a of the booster 6 supplying hydraulic oil to different stamping mechanisms 103 can be different; the volume of the high-pressure chamber 6a of the booster 6 supplying hydraulic oil to the stamping mechanism 103 requiring the highest stamping pressure can be the smallest. The low-pressure control valve 7 controls the entry or exit of hydraulic oil into the low-pressure chamber 6b, the high-pressure control valve 8 controls the entry or exit of hydraulic oil into the high-pressure chamber 6a, and the reset control valve 9 controls the entry or exit of hydraulic oil into the reset chamber 6c. Furthermore, the low-pressure control valve 7, the high-pressure control valve 8, and the reset control valve 9 are all three-way solenoid valves.

[0115] When high-pressure hydraulic oil output from the booster 6 is required, hydraulic oil is input into the low-pressure chamber 6b to drive the booster piston to move, thereby squeezing the hydraulic oil in the high-pressure chamber 6a to form high-pressure hydraulic oil, which is then output outward through the high-pressure control valve 8. At this time, the reset chamber 6c is also squeezed, and the hydraulic oil in the reset chamber 6c is discharged outward through the reset control valve 9. When the booster 6 resets, the reset control valve 9 is controlled to supply the original pressure hydraulic oil into the reset chamber 6c, driving the booster piston to reset. At this time, the low-pressure chamber 6b is compressed, so the low-pressure control valve 7 is controlled to discharge the hydraulic oil in the low-pressure chamber 6b. During the reset process of the booster 6, the high-pressure control valve 8 is simultaneously controlled to input the original pressure hydraulic oil into the high-pressure chamber 6a.

[0116] Simultaneously, the hydraulic oil input to the high-pressure chamber 6a for pressurization and the hydraulic oil input to the reset chamber 6c are both at their original pressure. The hydraulic oil input to the low-pressure chamber 6b of the booster 6 with the lowest boost pressure is at its original pressure, while the boosting oil input to the low-pressure chambers 6b of other booster 6s comes from the high-pressure chamber 6a of the adjacent booster 6 with the lowest boost pressure. Therefore, the pressure of the hydraulic oil input to the low-pressure chambers 6b of the booster 6 increases sequentially, thus increasing the pressure of the hydraulic oil output to the high-pressure chamber 6a. Furthermore, in addition to supplying hydraulic oil to the adjacent low-pressure chambers 6b of the booster 6, the high-pressure chamber 6a of the booster 6 also supplies hydraulic oil to the stamping mechanism 103 with the corresponding pressure requirement, resulting in different stamping pressures for the stamping mechanisms 103 in different processes. Moreover, the stamping mechanisms 103 are arranged according to the processing steps of the workpiece, not according to the magnitude of the stamping pressure.

[0117] Example 5:

[0118] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0119] The pressure delivery assembly includes:

[0120] The original pressure delivery pipeline 10 is used to connect to the output end of the oil supply drive component;

[0121] The return control valve 11 has one port connected to the original pressure conveying pipeline 10 via a pipeline, and the second port connected in parallel to the return chamber 103b of the stamping mechanism 103 via a pipeline.

[0122] The original pressure reset pipeline 12 connects the original pressure delivery pipeline 10 to the second interface of the reset control valve 9;

[0123] The original low-pressure input pipe 13 is connected to the second interface on the low-pressure control valve 7 connected to the booster 6 with the lowest boost pressure;

[0124] A proportional pressure control valve 14 is installed on the original pressure delivery pipeline 10;

[0125] The original pressure high pressure input pipe 29 connects the original pressure delivery pipe 10 to the second interface of the high pressure control valve 8.

[0126] In this embodiment, the original pressure delivery pipeline 10 is used to receive the original pressure hydraulic oil delivered by the oil supply drive assembly; the low-pressure original pressure input pipeline delivers hydraulic oil to the low-pressure chamber 6b of the outermost booster 6, which has the lowest boost pressure; the original pressure high-pressure input pipeline 29 can input the original pressure hydraulic oil into the high-pressure chamber 6a; and the proportional pressure control valve 14 adjusts in a timely manner when the oil pressure fluctuates in the original pressure delivery pipeline 10 to ensure the stability of the oil pressure in the original pressure delivery pipeline 10. The return control valve 11 is a three-way solenoid valve used to control the entry or exit of hydraulic oil in the return chamber 103b of the stamping mechanism 103, and the hydraulic oil input into the return chamber 103b is the original pressure hydraulic oil. The original pressure reset pipeline 12 delivers original pressure hydraulic oil to the reset chamber 6c, thereby resetting the booster 6. The original pressure low-pressure input pipeline 13 delivers original pressure hydraulic oil to the low-pressure chamber 6b of the booster 6, which has the lowest boost pressure, and then drives the booster to boost pressure.

[0127] Example 6:

[0128] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0129] The pressurized delivery assembly includes:

[0130] Several stamping conveying pipe fittings, each fitting connecting the third port of one of the high-pressure control valves 8 to the stamping chamber 103a of a corresponding stamping mechanism 103;

[0131] In fact, stamped conveyor pipe fittings include:

[0132] The high-pressure output pipe 15 is connected to the second port of the corresponding high-pressure control valve 8;

[0133] High pressure proportional valve 16 is connected to high pressure output pipe 15. High pressure proportional valve 16 is an electro-hydraulic proportional valve or an electro-hydraulic proportional directional valve.

[0134] Flow monitor 17 is connected in series with high pressure proportional valve 16 via a pipeline;

[0135] The stamping pressure monitor 18 is connected in series with the flow monitor 17 via a pipeline;

[0136] The stamping check valve 19 is connected in series with the stamping pressure monitor 18 via a pipeline;

[0137] The stamping control valve 20 has one port connected to the stamping check valve 19 via a pipe, and the second port connected to the stamping chamber 103a of the corresponding stamping mechanism 103 via a pipe.

[0138] In this embodiment, the stamping conveying assembly is used to convey the high-pressure hydraulic oil formed in the high-pressure chamber 6a of the corresponding intensifier 6 to the stamping chamber 103a of the corresponding stamping mechanism 103. The high-pressure conveying pipe is connected to the high-pressure control valve 8, and the high-pressure proportional valve 16 is used to control the flow rate of the conveyed high-pressure hydraulic oil and to appropriately adjust the oil pressure to meet the driving requirements of the corresponding stamping mechanism 103. The flow monitor 17 and the stamping pressure monitor 18 work together to monitor the oil pressure and flow rate of the hydraulic oil in the stamping conveying pipe, providing timely feedback to form a good closed-loop control, thereby ensuring the stamping effect and the synchronization of the actions of each stamping mechanism 103. The stamping control valve 20 is connected to the stamping chamber 103a to control the input of high-pressure hydraulic oil into the stamping chamber 103a or to discharge the hydraulic oil from the stamping chamber 103a. The stamping check valve 19 ensures that the hydraulic oil does not flow back, preventing pipeline pressure fluctuations.

[0139] Example 7:

[0140] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0141] The pressurized delivery assembly also includes:

[0142] Several pressurization auxiliary fittings, one less than the number of stamping conveying fittings, have one end of which connects the high-pressure output pipe 15 connected to the lower pressurization pressure booster 6 to the second interface of the low-pressure control valve 7 on the adjacent higher pressurization pressure booster 6.

[0143] Each pressurization auxiliary fitting includes:

[0144] The pressurization auxiliary pipeline 21 connects the high-pressure output pipeline 15 to the low-pressure control valve 7;

[0145] Several auxiliary proportional valves 22 are installed on the pressurization auxiliary pipeline 21 and are located at one end of the high-pressure delivery pipeline;

[0146] Several auxiliary check valves are installed on the pressurized auxiliary pipeline 21, near one end of the low-pressure control valve 7.

[0147] In this embodiment, the pressurization auxiliary pipe can deliver the pressurized hydraulic oil from the high-pressure chamber 6a of the corresponding booster 6 to the low-pressure chamber 6b of the adjacent booster 6; the auxiliary proportional valve 22 is used to control the flow rate of hydraulic oil in the pressurization auxiliary pipe 21, thereby ensuring the synchronicity of the operation of each booster 6; the auxiliary check valve can prevent hydraulic oil backflow.

[0148] Example 8:

[0149] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0150] Return oil delivery pipe fittings include:

[0151] The return oil conveying main pipe 23 is connected to the oil tank 1;

[0152] Return oil pipe 24 connects the third interface of return control valve 11 to return oil delivery main pipe 23;

[0153] Several stamped return oil pipes 25 are respectively connected to the third interface of the corresponding stamped control valve 20 and the return oil delivery main pipe 23;

[0154] Several low-pressure return oil pipes 26 are respectively connected to the third interface of the corresponding low-pressure control valve 7 and the return oil delivery main pipe 23;

[0155] Reset the return oil pipe 27 and connect the third port of the reset control valve 9 to the return oil delivery main pipe 23;

[0156] The end of the pump return oil pipe 5 is connected to the return oil delivery main pipe 23.

[0157] In this embodiment, the main return oil supply pipe connects each return oil branch pipe to the oil tank 1; the return oil return pipe 24 discharges the hydraulic oil in the return chamber 103b during compression (i.e., during the stamping process); the stamping return oil pipe 25 discharges the hydraulic oil in the stamping chamber 103a during the resetting process of the stamping mechanism 103; the low-pressure return oil pipe 26 discharges the hydraulic oil in the low-pressure chamber 6b when the booster 6 resets; and the reset return oil pipe 27 discharges the hydraulic oil in the reset chamber 6c when the booster 6 is driven. The end of the pumping return oil pipe 5 is connected to the main return oil supply pipe 23, thereby avoiding situations where the hydraulic oil pressure in the original pressure supply pipeline 10 is too high or the flow rate is too large without stopping the machine.

[0158] Example 9:

[0159] This embodiment provides a cold heading machine for metal processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0160] Also includes:

[0161] The control cabinet contains control circuits and controllers, and has a human-machine interface on the outside.

[0162] The original pressure sensor 28 is installed in the original pressure delivery pipeline 10;

[0163] The controller receives data from the high pressure monitor, flow monitor 17 and stamping pressure monitor 18 to determine whether the hydraulic control circuit is abnormal. At the same time, the controller programs and controls the delivery pump 2, pumping switching valve 3, low pressure control valve 7, high pressure control valve 8, reset control valve 9, return control valve 11, high pressure proportional valve 16, stamping control valve 20 and auxiliary proportional valve 22.

[0164] The controller is pre-loaded with operating data of the hydraulic control circuit during the processing of different parts;

[0165] The operating data includes the pressure threshold of the original pressure delivery pipeline 10, and the pressure threshold and flow rate threshold of the hydraulic oil input to the stamping chamber 103a of each stamping mechanism 103.

[0166] In this embodiment, the original pressure sensor 28 is used to monitor the pressure of the original pressure hydraulic oil in the original pressure delivery pipeline 10 and promptly feed it back to the controller, enabling the controller to perform precise control. The controller also reads the pressure and flow rate of the hydraulic oil entering each stamping mechanism 103 from the high-pressure pressure monitor and flow monitor 17, forming a closed-loop pressure oil control system to ensure the stamping pressure and speed of the stamping mechanism 103. Simultaneously, the controller programs and controls the delivery pump 2, pumping switching valve 3, low-pressure control valve 7, high-pressure control valve 8, reset control valve 9, return control valve 11, high-pressure proportional valve 16, stamping control valve 20, and auxiliary proportional valve 22, thereby ensuring the high efficiency and accuracy of the cooling machine's operation and guaranteeing the metal processing effect. Furthermore, the preset values ​​of the operating data can better determine whether the cold heading machine is operating abnormally.

[0167] Example 10:

[0168] This embodiment provides a method for using a cold heading machine for metal processing. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0169] Usage instructions include:

[0170] Step 1: Preset values. Select the type and material of the metal part to be processed through the human-computer interaction interface.

[0171] Step 2, data generation: The controller pre-generates the pressure values ​​for stamping of each stamping mechanism 103 based on the type and material of the pre-processed metal parts.

[0172] Step 3, numerical correction: The pressure value of the pre-generated stamping mechanism 103 is manually corrected and modified to form the final required processing pressure value and then saved.

[0173] Step four: Equipment operation. The controller controls the operation of each delivery pump 2 and valve according to the processing pressure value.

[0174] In this embodiment, the controller has preset values ​​for the stamping pressure required by each stamping mechanism 103 when processing metal parts of different materials, and a comparison table of this pressure data is provided for operators to compare. When using the cold heading machine, operators only need to input the metal part to be processed and its material into the controller through the human-machine interface. The controller retrieves the corresponding processing data and displays it through the human-machine interface. Operators can adjust the pressure of each stamping mechanism 103 according to the actual situation of historical processing, thereby forming the final processing data. Finally, running the equipment allows the corresponding stamping mechanism 103 to perform stamping processing at the specified pressure, which is both easy to operate and convenient for processing metal parts.

[0175] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cold heading machine for metal processing, characterized in that, include: A base (100); several fixed dies (101) arranged side by side and at equal intervals; several moving dies (102) arranged opposite to one fixed die (101); several stamping mechanisms (103) each driving one moving die (102) to stamp towards the fixed die (101); a hydraulic control circuit for driving the stamping mechanism (103) to run; wherein the hydraulic control circuit includes: an oil tank (1) containing hydraulic oil; an oil supply drive assembly for pumping out the hydraulic oil in the oil tank (1); and an oil inlet conveying system for conveying the hydraulic oil pumped out by the oil supply drive assembly. The hydraulic oil is supplied to each stamping mechanism (103); the return oil supply pipe is used to receive the hydraulic oil discharged from the stamping mechanism (103) and send it back to the oil tank (1); wherein the stamping mechanism (103) has a stamping chamber (103a) and a return chamber (103b); the oil supply drive assembly includes: a plurality of oil supply drive components, which are arranged in parallel and connected to the oil supply pipeline; wherein the oil supply drive components include: a delivery pump (2), the inlet end of which is connected to the oil tank (1); a pump output pipe, which is connected to the outlet end of the delivery pump (2); a pump switching valve (3), one of which is connected to the oil tank (1). The inlet is connected to the pump output pipe; the pump connection pipe (4) is connected to the second port of the pump switching valve (3); the pump return pipe (5) is connected to the third port of the pump switching valve (3); the oil inlet conveying system includes: a pressure conveying component for receiving hydraulic oil from the oil supply drive component; a pressurization module for pressurizing the pumped hydraulic oil; a pressurization conveying component for conveying the pressurized hydraulic oil from the pressurization module to the stamping mechanism (103) to drive the stamping mechanism (103) to run; the pressurization module includes: several pressurization... Each of the boosters (6) has a high-pressure chamber (6a), a low-pressure chamber (6b) and a reset chamber (6c), and they are arranged side by side in order of increasing boost pressure; several low-pressure control valves (7), one of the interfaces of each valve is connected to the low-pressure chamber (6b) of a booster (6) through a pipe; several high-pressure control valves (8), one of the interfaces of each valve is connected to the high-pressure chamber (6a) of a booster (6) through a pipe; and reset control valves (9), one of the interfaces of each booster (6) is connected in parallel to the reset chambers (6c) of each booster (6) through a pipe.

2. The cold heading machine for metal processing according to claim 1, characterized in that, The original pressure delivery assembly includes: an original pressure delivery pipeline (10) for connecting to the output end of the oil supply drive assembly; a return control valve (11), one of which is connected to the original pressure delivery pipeline (10) through an original pressure return pipeline (30), and the second interface is connected in parallel to the return chamber (103b) of the stamping mechanism (103) through a pipeline; an original pressure reset pipeline (12) for connecting the original pressure delivery pipeline (10) to the second interface of the reset control valve (9); an original pressure low-pressure input pipe (13) for connecting to the second interface of the low-pressure control valve (7) connected to the booster (6) with the lowest boost pressure; a proportional pressure control valve (14) for being installed on the original pressure delivery pipeline (10); and an original pressure high-pressure input pipe (29) for connecting the original pressure delivery pipeline (10) to the second interface of the high-pressure control valve (8).

3. A cold heading machine for metal processing according to claim 2, characterized in that, The pressurized conveying assembly includes: a plurality of pressurized conveying pipe fittings, each fitting connecting the third port of one of the high-pressure control valves (8) to the pressurizing chamber (103a) of a corresponding pressurizing mechanism (103); wherein the pressurized conveying pipe fittings include: a high-pressure output pipe (15) connected to the second port of the corresponding high-pressure control valve (8); a high-pressure proportional valve (16) connected to the high-pressure output pipe (15); a flow monitor (17) connected in series with the high-pressure proportional valve (16) via a pipe; a pressurizing pressure monitor (18) connected in series with the flow monitor (17) via a pipe; a pressurizing check valve (19) connected in series with the pressurizing pressure monitor (18) via a pipe; and a pressurizing control valve (20), one port of which is connected to the pressurizing check valve (19) via a pipe, and the second port of which is connected to the pressurizing chamber (103a) of the corresponding pressurizing mechanism (103) via a pipe.

4. A cold heading machine for metal processing according to claim 3, characterized in that, The pressurized conveying assembly further includes: several pressurized auxiliary pipe fittings, one less than the number of stamping conveying pipe fittings, one end of which connects the high-pressure output pipe (15) connected to the pressurizer (6) with lower pressurization pressure to the second interface of the low-pressure control valve (7) on the adjacent pressurizer (6) with higher pressurization pressure; wherein each of the pressurized auxiliary pipe fittings includes: a pressurized auxiliary pipeline (21) connecting the high-pressure output pipe (15) and the low-pressure control valve (7); several auxiliary proportional valves (22) set on the pressurized auxiliary pipeline (21) and near one end of the high-pressure conveying pipeline; and several auxiliary check valves set on the pressurized auxiliary pipeline (21) and near one end of the low-pressure control valve (7).

5. A cold heading machine for metal processing according to claim 4, characterized in that, The oil return pipeline includes: a main oil return pipeline (23) connected to the oil tank (1); a return oil return pipeline (24) connecting the third interface of the return control valve (11) to the main oil return pipeline (23); a plurality of stamped oil return pipelines (25) connecting the third interface of each stamped control valve (20) to the main oil return pipeline (23); a plurality of low-pressure oil return pipelines (26) connecting the third interface of each low-pressure control valve (7) to the main oil return pipeline (23); a reset oil return pipeline (27) connecting the third interface of the reset control valve (9) to the main oil return pipeline (23); wherein the end of the pumping oil return pipeline (5) is connected to the main oil return pipeline (23).

6. A cold heading machine for metal processing according to claim 5, characterized in that, Also includes: The control cabinet contains a control circuit and a controller, and has a human-machine interface on the outside. The original pressure sensor (28) is installed in the original pressure delivery pipeline (10). The controller obtains data from the original pressure sensor (28), the flow monitor (17) and the stamping pressure monitor (18) to determine whether the hydraulic control oil circuit is abnormal. At the same time, the controller programs and controls the delivery pump (2), the pumping switching valve (3), the low pressure control valve (7), the high pressure control valve (8), the reset control valve (9), the return control valve (11), the high pressure proportional valve (16), the stamping control valve (20), and the auxiliary proportional valve (22). The controller has preset operating data of the hydraulic control oil circuit when different parts are processed. The operating data includes the pressure threshold of the original pressure delivery pipeline (10), the pressure threshold of the hydraulic oil input to the stamping chamber (103a) of each stamping mechanism (103), and the flow rate threshold.

7. A method of using a cold heading machine for metalworking as described in claim 6, characterized in that: include: Step 1, preset value: Select the type and material of the metal part to be processed through the human-machine interface; Step 2, data generation: The controller pre-generates the pressure value of each stamping mechanism (103) for stamping processing based on the type and material of the pre-processed metal part; Step 3, numerical correction: Manually correct and modify the pressure value of the pre-generated stamping mechanism (103) to form the final required processing pressure value and save it; Step 4, equipment operation: The controller controls the operation of each delivery pump (2) and valve based on the processing pressure value.

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