CN111519014A - An improved heat treatment method for cylinder head and structure of heat treatment furnace - Google Patents

Abstract

The invention relates to an improved cylinder cover heat treatment method and a heat treatment furnace structure, which are characterized in that: the device comprises two rotary furnaces, wherein a temperature detector and an alarm are arranged in each rotary furnace; the inner cavity of each rotary furnace is provided with 12-18 rows of layer frame structures, each row of layer frame structure is provided with 12-18 layers of workpiece frames to form a 12-18 x 12-18 three-dimensional workpiece frame structure which is set as a high-temperature heating furnace and a constant-temperature aging furnace, the high-temperature heating furnace is a solid solution furnace, and the constant-temperature aging furnace is an aging furnace; a manipulator is arranged between the high-temperature heating furnace and the constant-temperature aging furnace, a quenching tank is arranged between a workpiece inlet/outlet of the high-temperature heating furnace and a workpiece inlet/outlet of the constant-temperature aging furnace, and a temperature detector is arranged in the quenching tank; an air cooling device is arranged at a workpiece inlet/outlet of the constant-temperature aging furnace; the mechanical arm sends the workpiece into the high-temperature heating furnace, the constant-temperature aging furnace, the quenching tank and the conveying belt, and takes the workpiece out of the high-temperature heating furnace, the constant-temperature aging furnace, the quenching tank and the conveying belt. The furnace has the characteristics of large volume of the furnace body, high efficiency, uniform heating of workpieces, high qualification rate and the like.

Description

An improved heat treatment method for cylinder head and structure of heat treatment furnace

technical field

The invention relates to an improved cylinder head heat treatment method and a heat treatment furnace structure. It belongs to the technical field of automobile and its accessories manufacturing equipment.

Background technique

In the prior art, the heat treatment method of the auto parts cylinder head generally uses a rotary heat treatment furnace for heat treatment. The heat treatment process is: manual input → solid solution → spray quenching water → aging → finished product; the heat treatment furnace is a small capacity furnace body structure , with a 10-column*5-layer structure (10-column*5-layer workpieces can be placed, and 2 workpieces can be placed on each layer), and its capacity is 100 workpieces/furnace; its structure is a tunnel-type furnace structure, including solid solution There is a spray quenching zone between the solid solution zone and the aging zone. The heat treatment method in the prior art has the following problems: (1) manual loading and unloading, the workload is large and the efficiency is low; (2) the workers work by the furnace, and the safety of the working environment is poor; (3) the workpiece is in the heat treatment process. Heat treatment together with the material frame (the weight of the material frame accounts for about 48%), which wastes energy; (4) the uniformity of the workpiece heat treatment temperature and quenching water temperature is poor, and the product qualification rate is low; (5) the residual heat of the material frame affects the ambient temperature of the workshop. The heat treatment furnaces in the prior art have the following problems: (1) the furnace body is small in volume and unreasonable in structure, and the number of heat-treating workpieces to be accommodated is small and the efficiency is low; (2) there is no fixed workpiece placement position, and an external material frame is required to enter the furnace, It is easy to cause the material frame to move during the rotary heat treatment and affect the heating of the workpiece, the workpiece is heated unevenly, and the product qualification rate is low; (3) The material frame is heated with the workpiece in the furnace body, resulting in energy waste; when it is removed from the furnace body, its temperature is high, The rest of the heat is dissipated to affect the workshop environment and temperature.

SUMMARY OF THE INVENTION

One of the purposes of the present invention is to solve the problems in the prior art cylinder head heat treatment method rotary heat treatment furnace that has a large workload of manual feeding and unloading, waste of energy when the material frame is heated together with the workpiece, poor uniformity of the heat treatment temperature of the workpiece, and low production efficiency and other problems, an improved heat treatment method for cylinder head is provided, which has the substantive features and remarkable technologies of small mechanical loading and unloading workload, energy saving, good heating uniformity of the workpiece, high product qualification rate and high production efficiency. progress.

The second purpose of the present invention is to solve the problems of the prior art cylinder head heat treatment furnace that the furnace body has a small volume, an unreasonable structure, a small number of heat-treating workpieces, low efficiency, no fixed workpiece placement position in the furnace, and uneven heating of the workpiece. , low product qualification rate and other problems, an improved structure of the cylinder head heat treatment furnace is provided, which has the advantages of large furnace body volume, reasonable structure, large number of heat treatment workpieces, high efficiency, fixed workpiece placement positions in the furnace, and uniform heating of workpieces. , high product qualification rate, outstanding substantive features and significant technological progress.

One of the objects of the present invention can be achieved by adopting the following technical solutions:

An improved method for heat treatment of cylinder head, characterized in that it comprises the following steps:

1) Two rotary kilns are set up, and temperature detectors and alarms are arranged in the rotary kilns; the inner cavity of each rotary kiln is provided with 12-18 rows of shelf structures, and each row of shelf structures has 12-18 layers The workpiece rack forms a 12-18*12-18 three-dimensional workpiece rack structure, which constitutes a large-capacity rotary heat treatment furnace structure; one of the rotary furnaces is set as a high-temperature heating furnace and the other is a constant temperature aging furnace. A manipulator is arranged between the constant temperature aging furnace, a quenching tank is set between the workpiece inlet/outlet of the high temperature heating furnace and the workpiece inlet/outlet of the constant temperature aging furnace, and a temperature detector is arranged in the quenching tank, and the workpiece inlet/outlet of the constant temperature aging furnace is installed in the quenching tank. There is a conveyor belt and an air cooling device at the exit; the workpiece is sent to the high temperature heating furnace, constant temperature aging furnace and quenching tank by the manipulator, and the workpiece is taken out from the high temperature heating furnace, constant temperature aging furnace and quenching tank;

2) The workpiece with the two-dimensional code is sent into the three-dimensional workpiece rack structure of the high-temperature heating furnace by the manipulator, and one or more workpieces are placed in each column and each layer of the workpiece in the three-dimensional workpiece rack structure; The temperature in the heating furnace is raised to 500°C-550°C and maintained at a constant temperature for 200 minutes to complete the high temperature heat treatment;

3) Take out all the high-temperature heat-treated workpieces from the high-temperature heating furnace by a manipulator, put them in the quenching tank for quenching for 60 seconds, and keep the water temperature at 80°C during the quenching process to complete the quenching of the workpieces;

4) Take out all the quenched workpieces from the quenching tank by the manipulator, and sequentially send them into the three-dimensional workpiece rack structure of the constant temperature aging furnace, and place one or more workpieces in each column and layer of the three-dimensional workpiece rack structure. Then, the temperature in the constant temperature aging furnace is raised to 200℃, and then the constant temperature aging is maintained for 180-190 minutes to complete the constant temperature aging heat treatment;

5) All the workpieces subjected to constant temperature aging heat treatment are taken out from the constant temperature aging furnace by the manipulator, and then sent to the conveyor belt in sequence, and the workpieces are sequentially cooled by the air cooling device to complete the heat treatment process of the cylinder head workpiece.

One of the objects of the present invention can also be achieved by adopting the following technical solutions:

Further, the control input end of the manipulator is connected to the control signal output end of the industrial computer PLC, and the work of the manipulator is controlled by the external industrial computer PLC.

Further, the temperature detector in the rotary furnace detects the temperature in the furnace and the temperature of each workpiece, and transmits the detected temperature signal to the signal input end of the external industrial computer PLC, and the control signal input end of the alarm in the rotary furnace is connected. The control signal output end of the industrial computer PLC, the industrial computer PLC judges whether the temperature of the workpiece exceeds the set range according to the input signal of the temperature detector and the two-dimensional code of the workpiece, so as to judge whether the workpiece is a good product or a waste product, and if it is judged as a waste product, it will drive an alarm. The machine alarms and drives the manipulator to put the workpiece waste from the upper limit of the conveyor belt into the waste bin; if it is judged as a good product, it drives the manipulator to remove the good workpiece from the upper limit of the conveyor belt and put it into the good product box; the industrial computer PLC according to the rotary furnace. The temperature signal of the temperature detector and the temperature detector in the quenching tank controls the temperature in the rotary furnace to be constant and the temperature in the quenching tank to be constant.

The second purpose of the present invention can be achieved by adopting the following technical solutions:

An improved structure of a heat treatment furnace for a cylinder head is characterized in that: it comprises two rotary furnaces, wherein a temperature detector and an alarm are arranged in the rotary furnaces; the inner cavity of each rotary furnace is provided with 12-18 rows of shelfs Structure, each row of shelf structure has 12-18 layers of workpiece racks, forming a 12-18*12-18 three-dimensional workpiece rack structure, which constitutes a large-capacity rotary heat treatment furnace structure; one of the rotary furnaces is set as a high-temperature heating furnace, The other is a constant temperature aging furnace, the high temperature heating furnace is a solid solution furnace, and the constant temperature aging furnace is an aging furnace; a manipulator is set between the high temperature heating furnace and the constant temperature aging furnace, and the workpieces of the high temperature heating furnace are imported/exited and the workpieces of the constant temperature aging furnace A quenching tank is arranged between the inlet and outlet, and a temperature detector is arranged in the quenching tank; a conveyor belt and an air cooling device are arranged at the inlet/outlet of the workpiece of the constant temperature aging furnace; Furnaces, quenching tanks and conveyor belts and removal of workpieces from high temperature heating furnaces, constant temperature aging furnaces, quenching tanks and conveyor belts.

The second object of the present invention can also be achieved by adopting the following technical solutions:

Further, the control input end of the manipulator is connected to the control signal output end of the industrial computer PLC, and the action output end of the manipulator has a telescopic structure, which extends into the high temperature heating furnace, the constant temperature aging furnace, the quenching tank and the conveyor belt to place and take out the workpiece. The industrial computer PLC controls the work of the manipulator.

Further, the temperature detector in the rotary furnace includes a furnace temperature detection head and a workpiece temperature detection head to detect the temperature in the furnace and the temperature of each workpiece, and the temperature signal output end of each temperature detection head is connected to the signal input end of the industrial computer PLC, The control signal input end of the alarm in the rotary furnace is connected to the control signal output end of the industrial computer PLC.

Further, the two-dimensional code of the workpiece is automatically recorded by the external industrial computer PLC, and a two-dimensional code scanner is arranged in the manipulator, and the signal output end of the two-dimensional code scanner is electrically connected to a signal input end of the external industrial computer PLC; the The PLC of the industrial computer judges whether the temperature of the workpiece exceeds the set range according to the input signal of the temperature detector and the QR code of the workpiece, so as to judge whether the workpiece is a good product or a waste product. The upper limit of the belt is put into the waste box; if it is judged to be a good product, the manipulator is driven to take the workpiece out of the upper limit of the conveyor belt and put it into the good product box; the industrial computer PLC is based on the temperature detector in the rotary furnace and the temperature detector in the quenching tank. The temperature signal in the rotary furnace is controlled to be constant and the temperature in the quenching tank is constant.

Further, the air cooling device includes a high-power fan and a fan frame, the fan frame is arranged above the conveyor belt at the outlet end of the constant temperature aging furnace, the high-power fan is arranged on the fan frame, and the air outlet of the high-power fan faces the Conveyor belt; the power and air volume of the high-power fan are adjustable.

The present invention has following outstanding substantive characteristic and technological progress:

1. The improved heat treatment method of the cylinder head involved in the present invention, because two rotary kilns are provided, which are respectively a high temperature heating furnace and a constant temperature aging furnace, and a temperature detector and an alarm are arranged in the rotary kiln; each rotary kiln is a three-dimensional large Capacity rotary furnace heat treatment furnace structure; also equipped with quenching tank, conveyor belt, air cooling device; temperature detector in the quenching tank, and a manipulator between the two rotary furnaces, and the manipulator sends the workpiece into the high-temperature heating furnace , constant temperature aging furnace and quenching tank and take the workpiece out of high temperature heating furnace, constant temperature aging furnace and quenching tank; raise the temperature in the high temperature heating furnace to 500℃-550℃ and keep constant temperature heating for 200 minutes to complete high temperature heat treatment; The workpieces are sequentially placed in the quenching tank 4 for quenching for 60 seconds, and the water temperature during the quenching process is kept at 80 °C to complete the quenching of the workpieces; The temperature in the aging furnace is raised to 200 °C and then maintained at a constant temperature for 180-190 minutes to complete the constant temperature aging heat treatment; finally, the workpieces are sequentially sent to the conveyor belt and the workpieces are sequentially cooled by the air cooling device to complete the heat treatment process of the cylinder head workpiece. Therefore, it can solve the problems of the prior art cylinder head heat treatment method that the rotary heat treatment furnace has a large workload of manual feeding and unloading, waste of energy when the material frame is heated together with the workpiece, poor uniformity of the heat treatment temperature of the workpiece, and low production efficiency. Substantial features and significant technological progress are outstanding, such as small blanking labor workload, energy saving, good heating uniformity of workpieces, high product qualification rate and high production efficiency.

2. The structure of the improved cylinder head heat treatment furnace involved in the present invention includes two rotary furnaces, in which a temperature detector and an alarm are provided; the inner cavity of each rotary furnace is provided with 12-18 rows of layers Rack structure, each row of rack structure has 12-18 layers of workpiece racks, forming a 12-18*12-18 three-dimensional workpiece rack structure, which constitutes a large-capacity rotary heat treatment furnace structure; one of the rotary furnaces is set as a high-temperature heating furnace , the other is a constant temperature aging furnace, the high temperature heating furnace is a solid solution furnace, and the constant temperature aging furnace is an aging furnace; a manipulator is set between the high temperature heating furnace and the constant temperature aging furnace, and the workpiece inlet/outlet of the high temperature heating furnace is connected with the constant temperature aging furnace. A quenching tank is set between the workpiece inlet/outlet, and a temperature detector is installed in the quenching tank; a conveyor belt and an air cooling device are arranged at the workpiece inlet/outlet of the constant temperature aging furnace; Aging furnaces, quenching tanks and conveyor belts and removing workpieces from high temperature heating furnaces, constant temperature aging furnaces, quenching tanks and conveyor belts. Therefore, it can solve the problems of the prior art cylinder head heat treatment furnace, such as small furnace body volume, unreasonable structure, small number of heat treatment workpieces accommodated, low efficiency, no fixed workpiece placement position in the furnace, uneven heating of workpieces, and low product qualification rate. , has the characteristics of large furnace body, reasonable structure, large number of heat treatment workpieces, high efficiency, fixed workpiece placement position in the furnace, uniform heating of workpieces, high product qualification rate, and significant technical progress.

3. The present invention adopts the frameless method to heat treat the workpiece, which can save energy consumption and fuel cost, improve the heating uniformity of the product, and improve the safety of the working environment; the applicant's trial shows that the cylinder head heating method of the present invention is applied. And heat treatment structure, energy consumption costs can be saved by about 37%.

4. The quenching tank is set up in the present invention, so that the workpiece is immersed in quenching water, which has the characteristics of constant temperature and uniform quenching water, and the placing and taking out of the workpiece in the solution furnace and the aging furnace are automatically completed by the manipulator, so the product can be improved. Heat uniformity, improve the safety of the working environment.

Description of drawings

FIG. 1 is a schematic structural diagram of a specific embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of the prior art.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Specific embodiment 1:

Referring to FIG. 1 , the structure of the improved cylinder head heat treatment furnace involved in this embodiment includes two rotary furnaces, in which a temperature detector and an alarm are provided; the inner cavity of each rotary furnace is provided with 12-18 Column layer structure 6, each column layer structure 6 has 12-18 layers of workpiece racks, forming a 12-18*12-18 three-dimensional workpiece rack structure, that is, a large-capacity rotary heat treatment furnace structure; set one of the rotary furnaces It is a high temperature heating furnace 1, the other is a constant temperature aging furnace 2, the high temperature heating furnace 1 is a solid solution furnace, and the constant temperature aging furnace 2 is an aging furnace; between the high temperature heating furnace 1 and the constant temperature aging furnace 2, a manipulator 3 is set to heat at a high temperature A quenching tank 4 is arranged between the workpiece inlet/outlet of the furnace 1 and the workpiece inlet/outlet of the constant temperature aging furnace 2, and a temperature detector is arranged in the quenching tank 4; a conveyor belt is arranged at the workpiece inlet/outlet of the constant temperature aging furnace 2 And the air cooling device 5; the workpiece is sent to the high temperature heating furnace 1, the constant temperature aging furnace 2, the quenching tank 4 and the conveyor belt by the manipulator 3, and the workpiece is removed from the high temperature heating furnace 1, the constant temperature aging furnace 2, the quenching tank 4 and the conveyor belt. take out.

In this example:

The control input end of the manipulator 3 is connected to the control signal output end of the industrial computer PLC. The action output end of the manipulator 3 has a telescopic structure and extends into the high temperature heating furnace 1, the constant temperature aging furnace 2, the quenching tank 4 and the conveyor belt to place and take out workpieces. The work of the manipulator 3 is controlled by an external industrial computer PLC. The manipulator 3 may use a conventional manipulator (robot), and the industrial computer PLC may be a conventional mobile external PLC.

The air cooling device 5 includes a high-power fan and a fan frame, the fan frame is arranged above the conveyor belt at the outlet end of the constant temperature aging furnace 2, the high-power fan is arranged on the fan frame, and the air outlet of the high-power fan faces the conveyor belt. Belt; the power and air volume of the high-power fan are adjustable.

The temperature detector in the rotary furnace (including the high temperature heating furnace 1 and the constant temperature aging furnace 2) includes a furnace temperature detection head and a workpiece temperature detection head to detect the temperature in the furnace and the temperature of each workpiece, and the temperature signal output end of each temperature detection head The signal input end of the industrial computer PLC is externally connected, and the control signal input end of the alarm in the rotary kiln is connected to the control signal output end of the industrial computer PLC.

The two-dimensional code of the workpiece 10 is automatically recorded by the external industrial computer PLC, and a two-dimensional code scanner is set in the manipulator 3, and the signal output end of the two-dimensional code scanner is electrically connected to a signal input end of the external industrial computer PLC; the The PLC of the industrial computer determines whether the temperature of the workpiece exceeds the set range according to the input signal of the temperature detector and the QR code of the workpiece 10 to determine whether the workpiece is a good product or a waste product. Take out from the upper limit of the conveyor belt and put it into the reject box; if it is judged to be a good product, drive the manipulator 3 to take out the good product from the upper limit of the conveyor belt and put it into the good product box; the industrial computer PLC is based on the temperature detector in the rotary furnace and the quenching tank 4. The temperature signal of the temperature detector controls the temperature in the rotary furnace to be constant and the temperature in the quenching tank 4 to be constant.

The temperature detector can adopt the temperature sensor of conventional technology, and the two-dimensional code scanner can adopt the two-dimensional code scanner of conventional technology. In addition to the three-dimensional fixed frame structure for placing the workpiece, the basic structure, heating method and sealing method of the conventional rotary kiln are adopted.

The improved cylinder head heat treatment method involved in this embodiment is characterized by comprising the following steps:

1) Two rotary kilns are set up, and temperature detectors and alarms are arranged in the rotary kilns; the inner cavity of each rotary kiln is provided with 12-18 rows of shelf structures 6, and each row of shelf structures 6 has 12-18 rows. 18 layers of workpiece racks form a 12-18*12-18 three-dimensional workpiece rack structure, which constitutes a large-capacity rotary heat treatment furnace structure; one of the rotary furnaces is set as high-temperature heating furnace 1 and the other as constant temperature aging furnace 2. A manipulator 3 is arranged between the high temperature heating furnace and the constant temperature aging furnace, a quenching tank 4 is arranged between the high temperature workpiece outlet of the high temperature heating furnace 1 and the aging workpiece inlet of the constant temperature aging furnace 2, and a temperature detector is arranged in the quenching tank 4. A conveyor belt and an air cooling device 5 are provided outside the aging workpiece outlet of the constant temperature aging furnace 2; And take out from the quenching tank 4;

2) The workpiece with the two-dimensional code is sent into the three-dimensional workpiece rack structure of the high-temperature heating furnace 1 through the manipulator 3, and one or more workpieces are placed in each row and each layer of the workpiece in the three-dimensional workpiece rack structure; then The temperature in the furnace of the high-temperature heating furnace is raised to 500℃-550℃ and maintained at a constant temperature for 200 minutes to complete the high-temperature heat treatment;

3) All the workpieces subjected to high temperature heat treatment are taken out from the high temperature heating furnace 1 by the manipulator 3, and are sequentially placed in the quenching tank 4 for quenching for 60 seconds, and the water temperature in the quenching process is maintained at 80 ° C to complete the quenching of the workpiece;

4) Take out all the quenched workpieces from the quenching tank 4 by the manipulator 3, and sequentially send them into the three-dimensional workpiece rack structure of the constant temperature aging furnace 2. Each row of the three-dimensional workpiece rack structure is placed on each layer of workpieces. Then, the temperature in the constant temperature aging furnace 2 is raised to 200°C, and then the constant temperature aging is maintained for 180-190 minutes to complete the constant temperature aging heat treatment;

5) All the workpieces subjected to constant temperature aging heat treatment are taken out from the constant temperature aging furnace 2 by the manipulator 3, and are sequentially sent to the conveyor belt and the workpieces are sequentially cooled by the air cooling device 5 to complete the heat treatment process of the cylinder head workpiece.

Further, the control input end of the manipulator 3 is connected to the control signal output end of the industrial computer PLC, and the work of the manipulator 3 is controlled by an external industrial computer PLC.

Further, the temperature detector in the rotary furnace detects the temperature in the furnace and the temperature of each workpiece, and transmits the detected temperature signal to the signal input end of the external industrial computer PLC, and the control signal input end of the alarm in the rotary furnace is connected. The control signal output end of the industrial computer PLC, the industrial computer PLC judges whether the temperature of the workpiece exceeds the set range according to the input signal of the temperature detector and the two-dimensional code of the workpiece, so as to judge whether the workpiece is a good product or a waste product, and if it is judged as a waste product, it will drive an alarm. The machine alarms and drives the manipulator to put the workpiece waste from the upper limit of the conveyor belt into the waste bin; if it is judged as a good product, it drives the manipulator 3 to output the good workpiece from the upper limit of the conveyor belt and put it into the good product box; the industrial computer PLC according to the rotary furnace The temperature signal of the temperature detector in the quenching tank 4 and the temperature detector in the quenching tank 4 control the temperature in the rotary furnace to be constant and the temperature in the quenching tank 4 to be constant.

In this embodiment, the workpiece 10 is accessed in the rotary kiln using the frameless processing method, the material is automatically loaded and unloaded by the manipulator 3, and the abnormal products are automatically identified and discharged through the detection and judgment of the external industrial computer PLC, so that the entire production conditions are automatically recorded. ; The solution furnace and aging furnace in the heat treatment process all adopt the furnace rotary structure; the heat treatment assembly line is composed of a feeding conveyor belt, a manipulator, a solution furnace, a quenching tank, an aging furnace, an air cooling rack, and a discharge conveyor belt.

The working steps of the pipeline include:

Loading→positioning→entering the furnace→solid solution→quenching→water removal→aging→out of the furnace-→-air cooling-unloading.

The positioning accuracy deviation of this embodiment is less than or equal to 20 mm; the aging and solution processes are continuously rotated in the furnace; after the aging is released, the workpiece is cooled to less than or equal to 70 ° C; the workpiece processing process is abnormal (drop, processing time overtime, abnormal pressure) automatic alarm; The abnormal products are automatically discharged; the processing conditions of each workpiece product are required to be recorded;

In this embodiment, the fork arm of the manipulator can be lengthened according to actual needs; the furnace body of the rotary furnace is a large-capacity structure, and the furnace chamber size: Φ4000-Φ5000mm (16 rows*5 layers can be loaded); the manipulator (robot) adopts an adjustable high-power The manipulator (robot), whose fork arm adopts long fork arm, can transport 3 products (length 1000-1350mm) at the same time, and the transport weight is 165-210kg (can transport 3 products at the same time); the air cooling device uses a large air volume fan, the Fan power/air volume: (power 20KW-45KW, air volume 1500-2500m ³ /min).

Referring to Figure 2, the prior art rotary heat treatment furnace workflow:

Feeding → QR code input → positioning → solution input → quenching water → aging input → air cooling → discharge

The working flow of the rotary heat treatment furnace of the present invention:

Feeding → QR code input → positioning → solution input → quenching water → aging input → air cooling → discharge

To sum up, although the heat treatment process of the present invention appears to be the same as the prior art on the surface, due to the use of a large-capacity rotary kiln and the use of a robot to deliver and take out workpieces, the temperature conditions in each stage of the heat treatment are different. At the same time, the temperature detector and alarm set in the rotary furnace of the present invention are provided with a two-dimensional code scanner in the manipulator, so that production automation can be formed, and the production efficiency and the quality of heat-treated products can be improved.

In practical application, the air cooling device 5 includes a high-power fan and a fan frame, the fan frame is arranged above the conveyor belt at the outlet end of the constant temperature aging furnace 2, the high-power fan is set on the fan frame, and the air outlet of the high-power fan is opposite to the To the conveyor belt; the power and air volume of the high-power fan are adjustable.

Claims (8)

1. An improved cylinder cover heat treatment method is characterized by comprising the following steps:

1) arranging two rotary furnaces, wherein a temperature detector and an alarm are arranged in each rotary furnace; the inner cavity of each rotary furnace is provided with 12-18 rows of shelf structures, each row of shelf structure is provided with 12-18 layers of workpiece shelves to form a 12-18 by 12-18 three-dimensional workpiece shelf structure, namely a large-capacity rotary heat treatment furnace structure is formed; setting one of the rotary furnaces as a high-temperature heating furnace (1) and the other as a constant-temperature aging furnace (2), arranging a manipulator (3) between the high-temperature heating furnace and the constant-temperature aging furnace, arranging a quenching tank (4) between a workpiece inlet/outlet of the high-temperature heating furnace (1) and a workpiece inlet/outlet of the constant-temperature aging furnace (2), arranging a temperature detector in the quenching tank (4), and arranging a conveying belt and an air cooling device (5) at the workpiece inlet/outlet of the constant-temperature aging furnace (2); the mechanical arm (3) sends the workpiece into the high-temperature heating furnace (1), the constant-temperature aging furnace (2) and the quenching tank (4) and takes the workpiece out of the high-temperature heating furnace (1), the constant-temperature aging furnace (2) and the quenching tank (4);

2) the method comprises the following steps that a workpiece with a two-dimensional code is sent into a three-dimensional workpiece frame structure of a high-temperature heating furnace (1) through a manipulator (3), and one or more workpieces are placed on each layer of workpieces in each row of the three-dimensional workpiece frame structure; then raising the temperature in the high-temperature heating furnace to 500-550 ℃ and keeping the constant temperature for heating for 200 minutes to finish high-temperature heat treatment;

3) the workpieces subjected to high-temperature heat treatment are completely taken out of the high-temperature heating furnace (1) through the manipulator (3), and are sequentially placed into a quenching tank (4) for quenching for 60 seconds, the water temperature in the quenching process is kept at 80 ℃, and the quenching of the workpieces is completed;

4) all the workpieces subjected to quenching treatment are taken out of the quenching tank (4) through a manipulator (3) and are sequentially sent into a three-dimensional workpiece frame structure of the constant-temperature aging furnace (2), and one or more workpieces are placed on each layer of workpieces in each row of the three-dimensional workpiece frame structure; then raising the temperature in the constant temperature aging furnace (2) to 200 ℃, keeping the constant temperature aging for 180-190 minutes, and finishing the constant temperature aging heat treatment;

5) and (3) taking out the workpieces subjected to constant-temperature aging heat treatment from the constant-temperature aging furnace (2) through the manipulator, sequentially feeding the workpieces into a conveying belt, and sequentially cooling the workpieces through an air cooling device (5) to finish the heat treatment process of the cylinder cover workpieces.

2. An improved cylinder head heat treatment method as claimed in claim 1, characterized in that: the control input end of the manipulator 3 is connected with the control signal output end of the industrial personal computer PLC, and the work of the manipulator (3) is controlled through the external industrial personal computer PLC.

3. An improved cylinder head heat treatment method as claimed in claim 2, characterized in that: a temperature detector in the rotary furnace detects the temperature in the furnace and the temperature of each workpiece, and transmits a detected temperature signal to a signal input end of an external industrial personal computer PLC, a control signal input end of an alarm in the rotary furnace is connected with a control signal output end of the industrial personal computer PLC, the industrial personal computer PLC judges whether the temperature of the workpiece exceeds a set range according to an input signal of the temperature detector and a workpiece two-dimensional code so as to judge whether the workpiece is good or waste, and drives the alarm to alarm and drives a manipulator to discharge the workpiece waste from the upper limit of a conveying belt into a waste box if the workpiece is judged to be waste; if the workpiece is judged to be good, the manipulator (3) is driven to take out the good workpiece from the upper limit of the conveyer belt and put the good workpiece into a good workpiece box; and the industrial personal computer PLC controls the temperature in the rotary furnace to be constant and the temperature in the quenching tank (4) to be constant according to temperature signals of the temperature detector in the rotary furnace and the temperature detector in the quenching tank (4).

4. The utility model provides a modified cylinder cap heat treatment furnace structure which characterized in that: the device comprises two rotary furnaces, wherein a temperature detector and an alarm are arranged in each rotary furnace; the inner cavity of each rotary furnace is provided with 12-18 rows of shelf structures, each row of shelf structure is provided with 12-18 layers of workpiece shelves to form a 12-18 by 12-18 three-dimensional workpiece shelf structure, namely a large-capacity rotary heat treatment furnace structure is formed; setting one of the rotary furnaces as a high-temperature heating furnace (1), the other rotary furnace as a constant-temperature aging furnace (2), the high-temperature heating furnace (1) as a solid solution furnace, and the constant-temperature aging furnace (2) as an aging furnace; a manipulator (3) is arranged between the high-temperature heating furnace (1) and the constant-temperature aging furnace (2), a quenching tank (4) is arranged between a workpiece inlet/outlet of the high-temperature heating furnace (1) and a workpiece inlet/outlet of the constant-temperature aging furnace (2), and a temperature detector is arranged in the quenching tank (4); a conveying belt and an air cooling device (5) are arranged at the workpiece inlet/outlet of the constant temperature aging furnace (2); the mechanical arm (3) sends the workpiece into the high-temperature heating furnace (1), the constant-temperature aging furnace (2), the quenching tank (4) and the conveyer belt, and takes the workpiece out of the high-temperature heating furnace (1), the constant-temperature aging furnace (2), the quenching tank (4) and the conveyer belt.

5. The improved cylinder head heat treatment furnace structure of claim 4, wherein: the control input end of the manipulator (3) is connected with the control signal output end of the industrial personal computer PLC, the action output end of the manipulator (3) is provided with a telescopic structure, the manipulator extends into the high-temperature heating furnace (1), the constant-temperature aging furnace (2), the quenching tank (4) and the conveying belt to place and take out workpieces, and the work of the manipulator (3) is controlled through the external industrial personal computer PLC.

6. An improved cylinder head heat treatment furnace structure according to claim 4 or 5, characterized in that: the temperature detector in the rotary furnace comprises a furnace temperature detection head and a workpiece temperature detection head to detect the temperature in the furnace and the temperature of each workpiece, the temperature signal output end of each temperature detection head is externally connected with the signal input end of an industrial personal computer PLC, and the control signal input end of an alarm in the rotary furnace is connected with the control signal output end of the industrial personal computer PLC.

7. The improved cylinder head heat treatment furnace structure of claim 6, wherein: the external industrial personal computer PLC automatically records the two-dimensional code of the workpiece, a two-dimensional code scanner is arranged in the manipulator (3), and the signal output end of the two-dimensional code scanner is electrically connected with one signal input end of the external industrial personal computer PLC; the industrial personal computer PLC judges whether the temperature of the workpiece exceeds a set range according to an input signal of the temperature detector and the workpiece two-dimensional code so as to judge whether the workpiece is good or waste, and drives an alarm to alarm and a manipulator to discharge the workpiece waste from the upper limit of a conveying belt into a waste box if the workpiece is judged to be waste; if the workpiece is judged to be good, the manipulator (3) is driven to take out the good workpiece from the upper limit of the conveyer belt and put the good workpiece into a good workpiece box; and the industrial personal computer PLC controls the temperature in the rotary furnace to be constant and the temperature in the quenching tank (4) to be constant according to temperature signals of the temperature detector in the rotary furnace and the temperature detector in the quenching tank (4).

8. The improved cylinder head heat treatment furnace structure of claim 1, wherein: the air cooling device (5) comprises a high-power fan and a fan frame, the fan frame is arranged above the conveying belt at the outlet end of the constant-temperature aging furnace (2), the high-power fan is arranged on the fan frame, and an air outlet of the high-power fan faces the conveying belt; the power and the air quantity of the high-power fan are adjustable.

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