Heat treatment device for piston production

Abstract

The utility model relates to a heat treatment device for piston production, which comprises a placing frame, a driving assembly and a material placing assembly, the driving assembly and the material placing assembly are arranged on the placing frame, the material placing assembly comprises a mounting disc and a linkage piece arranged in the middle of the upper end face of the mounting disc, and a plurality of first sliding grooves are formed in the mounting disc. A plurality of first sliding grooves are formed in the mounting disc, sliding blocks are arranged in the first sliding grooves in a sliding mode, bearing pieces are arranged on the sliding blocks, the material containing assembly further comprises lead screws capable of rotating in the mounting disc, and the lead screws are used for driving part of the sliding blocks to move close to or away from the center of the mounting disc in the transverse direction of the corresponding first sliding grooves. The bearing pieces on the multiple sliding blocks are matched with one another to be used for supporting a piston. According to the heat treatment device for piston production, the blocked surface of the piston during carburizing is reduced, it is guaranteed that the concentration and depth of a carburizing layer on the piston are uniform, and excessive distortion of a carburizing part is prevented.

Description

Technical Field

[0001] The utility model relates to the field of piston production, in particular to a heat treatment device for piston production. Background Art

[0002] Piston heat treatment refers to the process of heating the piston to a certain temperature under certain conditions, and then improving its mechanical and physical properties through rapid cooling or heating, so as to improve its hardness, wear resistance and corrosion resistance. The process flow of piston heat treatment mainly includes quenching, tempering, surface hardening and other links. The surface hardening of the piston refers to the strengthening treatment of the piston surface, generally using methods such as electric spark machining, carburizing, nitriding, etc. Piston carburizing is to spray a gas containing a carbon source onto the piston surface under high temperature and high pressure conditions, so that the surface undergoes chemical and physical reactions at the microscopic level, thereby forming a hard surface layer rich in carbon.

[0003] The piston is generally placed in a carburizing furnace for carburizing treatment. Since the piston is generally a columnar workpiece and its height is relatively small, the piston is a non-long rod-shaped workpiece. Considering that the placement of the piston must be stable and cannot be subjected to prestress, the non-long rod-shaped piston is generally not placed in the carburizing furnace in a vertical hanging manner, but the piston is placed flat on a placement rack, and then the placement rack is placed in the carburizing furnace. However, when the piston is placed, the placement surface that contacts the placement rack cannot be as fully contacted with the carbon-containing source gas as the other surfaces. Therefore, the carburizing effect of its placement surface is poorer than that of other surfaces. In the prior art, a hollow placement rack is used to address this problem, so that the placement surface of the piston can contact the carbon source gas as much as possible. However, a large area of ​​the placement surface is still in a blocked state, resulting in a large area of ​​the piston still not being able to fully contact the carbon-containing source gas, resulting in uneven concentration and depth of the carburized layer on the piston, causing irregular warping during quenching, and causing excessive distortion of the carburized part. In order to solve the above problems, a heat treatment device for piston production is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a heat treatment device for piston production to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heat treatment device for piston production, comprising a placement rack, a driving assembly and a material placement assembly arranged on the placement rack;

[0007] The material placing assembly comprises a mounting plate and a linkage member arranged at a middle position of an upper end surface of the mounting plate, the mounting plate is provided with a plurality of sliding grooves 1, sliding blocks are slidably arranged in the plurality of sliding grooves 1, and a supporting member is arranged on the sliding block, the material placing assembly also comprises a screw rod which can rotate in the mounting plate, the screw rod is used to drive a part of the sliding blocks to move towards or away from the center of the mounting plate along the lateral direction of the corresponding sliding groove 1, the sliding block which moves partially drives the linkage member to drive the other sliding blocks to move towards or away from the center of the mounting plate accordingly, the sliding block drives the supporting member to move towards or away from the center of the mounting plate to determine the position of the supporting member, and the supporting members on the plurality of sliding blocks cooperate with each other to place the piston;

[0008] The driving assembly is used to drive the screw rods of a plurality of the material placing assemblies to rotate in the same direction simultaneously.

[0009] Furthermore, the material placement assembly also includes a cover, on which a plurality of sliding grooves 2 corresponding to the plurality of sliding grooves 1 are formed, the sliding grooves 2 pass through the cover, and the cover is detachably connected to the mounting plate.

[0010] Furthermore, the linkage member includes a rotating disk and a connecting rod, the rotating disk is rotatably mounted on the middle part of the upper end surface of the mounting disk, one end of the connecting rod is rotatably connected to the rotating disk, and the other end of the connecting rod is rotatably connected to the sliding block, and the connecting rod is L-shaped.

[0011] Furthermore, a rotating hole 1 is provided in the middle of the lower end surface of the cover, a rotating hole 2 is provided in the middle of the upper end surface of the mounting plate, a rotating pin is provided through the middle of the rotating plate, the upper end of the rotating pin is rotatably connected to the rotating hole 1, and the lower end of the rotating pin is rotatably connected to the rotating hole 2.

[0012] Furthermore, a nut seat is threadedly connected to the screw rod, the nut seat is detachably connected to a part of the sliding block, and the screw rod is arranged in parallel with a part of the sliding groove.

[0013] Furthermore, the driving assembly includes a rotating handle and a plurality of rack plates 1, and the plurality of rack plates 1 are correspondingly arranged in front of the plurality of material placing assemblies;

[0014] The driving assembly also includes a chain and a plurality of sprockets, wherein the sprocket is arranged on the frame plate through a bearing, one end of the rotating handle is fixedly connected to the front end surface of the sprocket, and one end of the screw rod is detachably connected to the rear end surface of the sprocket, and the rotating handle can drive the screw rod to rotate.

[0015] Furthermore, the chain is embedded in a plurality of the sprockets, and the chain can drive the plurality of the sprockets to rotate simultaneously to drive a plurality of the material placing assemblies to move simultaneously.

[0016] Furthermore, the supporting member includes a plurality of extension rods, the upper end surfaces of the extension rods are provided with supporting blocks, the plurality of extension rods are respectively arranged on the upper end surfaces of the sliding blocks, and one end of the extension rods extends out of the second sliding groove.

[0017] Compared with the prior art, the utility model has the following beneficial effects: by setting up a placing assembly, the columnar piston can be stably supported in the carbon source gas, so that the surface of the piston blocked during carburizing is reduced, thereby ensuring that the concentration and depth of the carburized layer on the piston are uniform, and preventing excessive deformation of the carburized parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the heat treatment device for piston production.

[0019] Figure 2 This is a schematic diagram of the structure of the mounting plate and cover of the heat treatment device for piston production.

[0020] Figure 3 This is a view of the matching linkage and sliding block of a heat treatment device for piston production.

[0021] Figure 4 A view showing the matching of the lead screw and the sliding block of a heat treatment device for piston production.

[0022] In the figure: 1. placement rack; 2. driving assembly; 21. rotating handle; 22. rack plate 1; 23. chain; 24. sprocket; 3. material placement assembly; 31. mounting plate; 32. cover; 33. extension rod; 34. sliding groove 1; 35. rotating connection member 2; 36. sliding block; 37. connecting rod; 38. sliding groove 2; 39. rotating connection member 1; 310. supporting block; 311. rotating disk; 312. screw rod; 313. rack plate 2; 314. nut seat; 315. rotating pin. DETAILED DESCRIPTION

[0023] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0024] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0025] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0026] Example 1, please refer to Figure 1 to Figure 4 The structure shown in the embodiment of the utility model is a heat treatment device for piston production, comprising a placement rack 1, a driving assembly 2 and a material placement assembly 3 arranged on the placement rack 1;

[0027] The material placing assembly 3 comprises a mounting plate 31 and a linkage member arranged at the middle position of the upper end surface of the mounting plate 31. The mounting plate 31 is provided with a plurality of sliding grooves 34, and sliding blocks 36 are slidingly arranged in the plurality of sliding grooves 34. A supporting member is arranged on the sliding block 36. The material placing assembly 3 further comprises a screw rod 312 which can rotate in the mounting plate 31. The screw rod 312 is used to drive some sliding blocks 36 to move toward or away from the center of the mounting plate 31 along the lateral direction of the corresponding sliding groove 34. The sliding blocks 36 which move partially drive the linkage member to drive the other sliding blocks 36 to move toward or away from the center of the mounting plate 31 accordingly. The sliding blocks 36 drive the supporting member to move toward or away from the center of the mounting plate 31 to determine the position of the supporting member. The supporting members on the plurality of sliding blocks 36 cooperate with each other to place the piston.

[0028] The driving assembly 2 is used to drive the screw rods 312 of a plurality of material placing assemblies 3 to rotate in the same direction simultaneously.

[0029] In this embodiment, the placement rack 1 includes multiple layers of placement plates, and partitions are arranged on each layer of the placement plates, which are used to separate each layer of the placement plates into several placement areas with the partitions, and several material placement components 3 are placed in several placement areas. The above-mentioned placement rack 1 is a common placement device, and the placement rack 1 that meets the above-mentioned requirements can be selected in various fields such as industrial fields and life fields. It is a prior art and will not be repeated here. In addition, the several material placement components 3 on each layer of the placement plates are divided into several groups, and each group of material placement components 3 is neatly arranged and placed in the placement area. On the one hand, it can ensure the good circulation of gas in the carburizing furnace, and on the other hand, it can ensure that the driving component 2 can simultaneously drive several material placement components 3 located in the same group.

[0030] Furthermore, the material placement assembly 3 also includes a cover 32 , on which a plurality of second sliding grooves 38 corresponding to the plurality of first sliding grooves 34 are formed, the second sliding grooves 38 pass through the cover 32 , and the cover 32 is detachably connected to the mounting plate 31 .

[0031] In this embodiment, the cover 32 is detachably connected to the mounting disk 31 by means of a threaded connection, and after the cover 32 is connected to the mounting disk 31, the projection of the sliding groove 2 38 in the vertical direction coincides with the sliding groove 1 34, the sliding groove 1 34 and the sliding groove 2 38 have the same length, and the center lines of the two point to the center point of the mounting disk 31.

[0032] Furthermore, the linkage member includes a rotating disk 311 and a connecting rod 37. The rotating disk 311 is rotatably installed on the middle part of the upper end surface of the mounting disk 31. One end of the connecting rod 37 is rotatably connected to the rotating disk 311, and the other end of the connecting rod 37 is rotatably connected to the sliding block 36. The shape of the connecting rod 37 is L-shaped.

[0033] In this embodiment, a rotating connection member 39 is provided on the rotating disk 311, and a rotating connection member 35 is provided on the sliding block 36. The two ends of the connecting rod 37 are respectively not connected to the rotation of the rotating connection member 39 and the rotating connection member 35, so that the two ends of the connecting rod 37 can rotate freely. The rotating rotating disk 311 will drive the connecting rod 37 to rotate, and the rotating connecting rod 37 will pull the sliding block 36 to move laterally along the sliding groove 1 34. The coordination of the rotating disk 311, the connecting rod 37 and the sliding block 36 can refer to the crank slider mechanism, that is, the rotational motion is converted into linear motion. The number of sliding grooves 1 34 is four, and the L-shaped connecting rod 37 can better pull the sliding block 36 to move when it rotates.

[0034] Furthermore, a rotating hole 1 (not shown in the figure) is provided in the middle of the lower end surface of the cover 32, a rotating hole 2 (not shown in the figure) is provided in the middle of the upper end surface of the mounting plate 31, and a rotating pin 315 is provided through the middle position of the rotating plate 311, the upper end of the rotating pin 315 is rotatably connected to the rotating hole 1, and the lower end of the rotating pin 315 is rotatably connected to the rotating hole 2.

[0035] In this embodiment, the rotating pin 315 passes through the rotating disk 311 and is fixedly connected thereto. The lower end of the rotating pin 315 is movably connected to the second rotating hole through a bearing. Both ends of the rotating pin 315 can rotate freely so that the rotating disk 311 can rotate when subjected to thrust.

[0036] Furthermore, a nut seat 314 is screwed to the screw rod 312 , the nut seat 314 is detachably connected to a portion of the sliding block 36 , and the screw rod 312 is arranged in parallel with a portion of the sliding groove 34 .

[0037] In this embodiment, a sliding groove three is opened inside the mounting disk 31, and the nut seat 314 is slidably connected to the inside of the sliding groove three, so that the nut seat 314 has space to move. Two parallel frame plates 313 are also arranged inside the mounting disk 31. The screw rod 312 passes through the two frame plates 313 and is rotatably connected to the two frame plates 313 through bearings, so that the screw rod 312 can rotate freely when subjected to axial force.

[0038] Furthermore, the driving assembly 2 includes a rotating handle 21 and a plurality of racks 22, and the plurality of racks 22 are correspondingly arranged in front of the plurality of material placing assemblies 3;

[0039] The driving assembly 2 also includes a chain 23 and a plurality of sprockets 24. The sprocket 24 is arranged on the frame plate 22 through a bearing. One end of the rotating handle 21 is fixedly connected to the front end surface of the sprocket 24, and one end of the screw rod 312 is detachably connected to the rear end surface of the sprocket 24. The rotating handle 21 can drive the screw rod 312 to rotate.

[0040] In this embodiment, the number of rotating handles 21 is at least one, and the rotating handle 21 is connected to the screw rod 312 of the material placing assembly 3 located at the most side. Since multiple sprocket wheels 24 are driven by one chain 23, when the rotating handle 21 is rotated, all the sprocket wheels 24 start to rotate, thereby driving a plurality of material placing assemblies 3 of the same group located on the same placing plate to operate simultaneously, and the material placing assemblies 3 can be regulated at the same time, so that the positions of the supporting members on all the material placing assemblies 3 after moving are the same, so that the pistons of the same batch can all be properly placed on the supporting members.

[0041] Furthermore, the chain 23 is embedded in a plurality of sprocket wheels 24 , and the chain 23 can drive the plurality of sprocket wheels 24 to rotate simultaneously to drive the plurality of material placing assemblies 3 to move simultaneously.

[0042] Furthermore, the supporting member includes a plurality of extension rods 33 , the upper end surface of the extension rod 33 is provided with a supporting block 310 , and the plurality of extension rods 33 are respectively provided on the upper end surface of the sliding block 36 , and one end of the extension rod 33 extends out of the sliding groove 2 38 .

[0043] In this embodiment, there are four corresponding sliding grooves 34, sliding blocks 36, supporting members. The number of connecting rods 37 is also four, and the four supporting members have four supporting blocks 310. As the four sliding blocks 36 move by themselves, the four supporting blocks 310 also move by themselves accordingly. According to the size of the piston, the four supporting blocks 310 are moved to a suitable position, and the piston frame is placed between the four supporting blocks 310. At this time, the contact surface between the piston and the supporting block 310 is the shielding surface. The supporting block 310 is spherical. When the height of the piston is relatively large, that is, when the piston is a columnar workpiece, the side wall of the piston is placed between the four supporting members, so that it can be stably placed. Piston, at this time, the contact surface between the piston and the spherical supporting block 310 is very small, which is smaller than the contact surface blocked by placing it on a hollow placement plate in the prior art, so that when the workpiece is carburized, the depth and concentration of carburization on its surface are more uniform. When the height of the piston is relatively small, that is, the piston is a disc-shaped piston (or an approximately flat-plate-shaped piston), the bottom surface of the piston is placed between the four spherical supporting blocks 310, so that the piston can be stably placed. Similar to the above-mentioned columnar piston, the blocked surface of the disc-shaped piston is also smaller, and the depth and concentration of carburization on its surface are also more uniform.

[0044] It should be noted that, in the present embodiment, the so-called partial sliding block 36 refers to a certain sliding block 36, which is detachably connected to the nut seat 314 and moves laterally along the sliding groove 34 as the nut seat 314 moves. The sliding block 36 moving in a straight line will push the rotating disk 311 to rotate, and the rotating rotating disk 311 will drive the remaining sliding blocks 36 to move along the sliding groove 34, thereby realizing the self-centering movement of the four sliding blocks 36.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat treatment device for piston production, characterized in that: It includes a placing rack, a driving component and a material placing component arranged on the placing rack; The material placing assembly comprises a mounting plate and a linkage member arranged at a middle position of an upper end surface of the mounting plate, the mounting plate is provided with a plurality of sliding grooves 1, sliding blocks are slidably arranged in the plurality of sliding grooves 1, and a supporting member is arranged on the sliding block, the material placing assembly also comprises a screw rod which can rotate in the mounting plate, the screw rod is used to drive a part of the sliding blocks to move towards or away from the center of the mounting plate along the lateral direction of the corresponding sliding groove 1, the sliding block which moves partially drives the linkage member to drive the other sliding blocks to move towards or away from the center of the mounting plate accordingly, the sliding block drives the supporting member to move towards or away from the center of the mounting plate to determine the position of the supporting member, and the supporting members on the plurality of sliding blocks cooperate with each other to place the piston; The driving assembly is used to drive the screw rods of a plurality of the material placing assemblies to rotate in the same direction simultaneously.

2. A heat treatment device for piston production according to claim 1, characterized in that: The material placing assembly further comprises a cover, on which a plurality of second sliding grooves corresponding to the plurality of first sliding grooves are formed, the second sliding grooves pass through the cover, and the cover is detachably connected to the mounting plate.

3. A heat treatment device for piston production according to claim 2, characterized in that: The linkage member includes a rotating disk and a connecting rod. The rotating disk is rotatably mounted on the middle part of the upper end surface of the mounting disk. One end of the connecting rod is rotatably connected to the rotating disk, and the other end of the connecting rod is rotatably connected to the sliding block. The connecting rod is L-shaped.

4. A heat treatment device for piston production according to claim 3, characterized in that: A rotating hole 1 is provided in the middle of the lower end surface of the cover, a rotating hole 2 is provided in the middle of the upper end surface of the mounting plate, a rotating pin is provided through the middle of the rotating plate, the upper end of the rotating pin is rotatably connected to the rotating hole 1, and the lower end of the rotating pin is rotatably connected to the rotating hole 2.

5. A heat treatment device for piston production according to claim 4, characterized in that: A nut seat is threadedly connected to the screw rod, the nut seat is detachably connected to a part of the sliding block, and the screw rod is arranged in parallel with a part of the sliding groove.

6. A heat treatment device for piston production according to claim 5, characterized in that: The driving assembly includes a rotating handle and a plurality of rack plates 1, and the plurality of rack plates 1 are correspondingly arranged in front of the plurality of material placing assemblies; The driving assembly also includes a chain and a plurality of sprockets, wherein the sprocket is arranged on the frame plate through a bearing, one end of the rotating handle is fixedly connected to the front end surface of the sprocket, and one end of the screw rod is detachably connected to the rear end surface of the sprocket, and the rotating handle can drive the screw rod to rotate.

7. A heat treatment device for piston production according to claim 6, characterized in that: The chain is embedded in a plurality of the sprockets, and the chain can drive the plurality of the sprockets to rotate simultaneously to drive the plurality of the material placing components to move simultaneously.

8. A heat treatment device for piston production according to claim 7, characterized in that: The supporting member comprises a plurality of extension rods, the upper end surfaces of the extension rods are provided with supporting blocks, the plurality of extension rods are respectively arranged on the upper end surfaces of the sliding blocks, and one end of the extension rods extends out of the second sliding groove.

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